WO2024190154A1 - 車両用駆動装置 - Google Patents
車両用駆動装置 Download PDFInfo
- Publication number
- WO2024190154A1 WO2024190154A1 PCT/JP2024/003652 JP2024003652W WO2024190154A1 WO 2024190154 A1 WO2024190154 A1 WO 2024190154A1 JP 2024003652 W JP2024003652 W JP 2024003652W WO 2024190154 A1 WO2024190154 A1 WO 2024190154A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- module
- electric machine
- rotating electric
- power module
- drive device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/30—Structural association with control circuits or drive circuits
- H02K11/33—Drive circuits, e.g. power electronics
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
- H02K5/225—Terminal boxes or connection arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
Definitions
- This disclosure relates to a vehicle drive system.
- the above-mentioned configuration is a structure in which the main components of the inverter device (such as the power module and smoothing capacitor) are stacked vertically and fixed to the inverter housing, which poses the problem of an increase in the vertical size.
- the above-mentioned configuration is a structure in which the inverter housing is fixed to the housing main body, which fixes the inverter device, and the inverter housing, which requires assembling the inverter device to the inverter housing and assembling the inverter housing to the housing main body, which poses the problem of poor work efficiency.
- the present disclosure aims to reduce the vertical size while improving work efficiency during assembly.
- a rotating electric machine a transmission mechanism that is drivingly connected between the rotating electric machine and wheels; a power module having a power semiconductor element and supplying a plurality of phases of AC power to the rotating electric machine; a capacitor module including a smoothing capacitor electrically connected between the power module and a power source; a wiring module including a bus bar for multiple phases that electrically connects the rotating electric machine and the power module; a case that accommodates the rotating electric machine, the transmission mechanism, the power module, the capacitor module, and the wiring module, the case integrally includes a portion that forms a first storage chamber, a portion that forms a second storage chamber, and a partition wall that separates the first storage chamber and the second storage chamber, the first housing chamber houses the rotating electric machine and the transmission mechanism, the second housing chamber houses the power module, the capacitor module, and the wiring module,
- the vehicle drive device is provided, in which the power module, the capacitor module, and the wiring module are directly fastened to the partition wall at respective fastening positions where they do not overlap each other when viewed in
- this disclosure makes it possible to reduce the vertical size while improving work efficiency during assembly.
- FIG. 1 is a schematic top view showing a state in which a vehicle drive device is mounted in a vehicle.
- 2 is a cross-sectional view of a main portion of the vehicle drive device.
- FIG. FIG. 1 is a skeleton diagram showing a vehicle drive device. 1 is a top view that illustrates a vehicle drive device according to an embodiment of the present invention;
- FIG. 4 is a cross-sectional view showing a schematic diagram of a water channel structure between a partition wall and a power module. 4 is a cross-sectional view showing, in a schematic and partial manner, the fastening structure between various bus bars when cut along line BB in FIG. 3.
- FIG. 1 is a top view that illustrates a vehicle drive device according to an embodiment of the present invention
- 1 is a side view that illustrates a vehicle drive device according to an embodiment of the present invention
- 2 is a perspective view of a second terminal portion of the bus bar module for the vehicle drive device of the embodiment.
- FIG. FIG. 4 is a top view of a vehicle drive device according to a first modified example.
- 13 is a perspective view of a second terminal portion of a bus bar module for a vehicle drive device according to a first modified example.
- FIG. FIG. 11 is a top view of a vehicle drive device according to a second modified example.
- FIG. 11 is a side view that illustrates a vehicle drive device according to a second modified example.
- FIG. 13 is a top view of a vehicle drive device according to a third modified example.
- FIG. 1 is a diagram showing an example of an electric circuit including a Y capacitor.
- FIG. 2 is an explanatory diagram of a vehicle drive device having a three-axis configuration.
- the directions of each component in the following description refer to the directions when the component is assembled into the vehicle drive device 100. Furthermore, the terms used for the dimensions, orientation, and position of each component are concepts that include differences due to errors (errors that are acceptable in manufacturing).
- driving connection refers to a state in which two rotating elements are connected so as to be able to transmit a driving force (synonymous with torque), and includes a state in which the two rotating elements are connected so as to rotate as a unit, or a state in which the two rotating elements are connected so as to be able to transmit a driving force via one or more transmission members.
- Such transmission members include various members (e.g., shafts, gear mechanisms, belts, chains, etc.) that transmit rotation at the same speed or at a variable speed.
- the transmission members may also include engagement devices (e.g., friction engagement devices, meshing engagement devices, etc.) that selectively transmit rotation and driving force.
- rotating electric machine is used as a concept that includes motors, generators, and motor/generators that function as both a motor and a generator as necessary.
- overlapping when viewed in a specific direction means that when an imaginary line parallel to the line of sight is moved in each direction perpendicular to the imaginary line, there is at least a part of an area where the imaginary line intersects with both of the two components.
- arrangement areas in a specific direction overlap means that at least a part of the arrangement area of the other component in a specific direction is included within the arrangement area of one component in a specific direction.
- FIG. 1 is a schematic diagram of a top view showing the state in which the vehicle drive device 100 is mounted in the vehicle VC.
- FIG. 2 is a cross-sectional view of the main parts of the vehicle drive device 100.
- FIG. 2A is a skeleton diagram showing the vehicle drive device 100.
- FIG. 3 is a top view showing the vehicle drive device 100 according to the present embodiment.
- FIG. 3A is a cross-sectional view showing the water channel structure between the partition wall portion 29 and the power module PM, showing the water channel structure when cut along line A-A in FIG. 3.
- FIG. 3B is a cross-sectional view showing the fastening structure between various bus bars when cut along line B-B in FIG. 3.
- FIG. 3A is a cross-sectional view showing the water channel structure between the partition wall portion 29 and the power module PM, showing the water channel structure when cut along line A-A in FIG. 3.
- FIG. 3B is a cross-sectional view showing the fastening structure between various bus bars when cut along line
- FIG. 3C is a top view showing the vehicle drive device 100 according to the present embodiment, and is a diagram showing the control board 98, unlike FIG. 3.
- FIG. 4 is a side view showing the vehicle drive device 100 according to the present embodiment.
- the inverter cover member 203 on the upper part of the inverter case portion 24 is omitted so that the elements arranged inside the inverter case portion 24 can be seen.
- the control board 98 (see FIG. 3C) is omitted from the illustration so that the elements arranged on the second side Y2 of the control board 98 in the second direction can be seen.
- first direction X, a second direction Y, and an axial direction A define a first direction X, a second direction Y, and an axial direction A.
- the first direction X, the second direction Y, and the axial direction A are three axial directions perpendicular to each other, and the second direction Y has an up-down component.
- the second direction may be parallel to the direction of gravity (vertical direction) or inclined when the vehicle drive device 100 is mounted on the vehicle VC.
- the vehicle drive device 100 may be mounted on the vehicle VC with the second direction first side Y1 on the upper side and the second direction second side Y2 on the lower side.
- the vehicle drive device 100 may also be mounted on the vehicle VC with the first direction first side X1 on the front side L1 (front side of the vehicle longitudinal direction L) and the first direction second side X2 on the rear side L2 (rear side of the vehicle longitudinal direction L). As shown in FIG. 1, the vehicle drive device 100 may be mounted on the vehicle VC on the front side L1 of the center of the vehicle longitudinal direction L.
- the vehicle drive device 100 when the vehicle drive device 100 is mounted on the vehicle VC on the rear side L2 of the center of the vehicle in the vehicle front-rear direction L, the vehicle drive device 100 can be mounted on the vehicle VC with the first side X1 of the first direction being the rear side L2 and the second side X2 of the first direction being the front side L1, so that the inverter device 90 is disposed closer to the center of the vehicle in the vehicle front-rear direction L than the rotating electric machine 1.
- the pair of wheels W driven by the vehicle drive device 100 may be, for example, a pair of left and right rear wheels.
- the pair of left and right front wheels and the pair of left and right rear wheels that are not driven by the vehicle drive device 100 can be configured to be driven by a drive device other than the vehicle drive device 100.
- the drive device other than the vehicle drive device 100 can be, for example, a drive device configured to transmit the output torque of an internal combustion engine to a pair of wheels to be driven, a drive device configured to transmit the output torque of a rotating electric machine (a rotating electric machine other than the rotating electric machine 1 provided in the vehicle drive device 100) to a pair of wheels to be driven, or a drive device configured to transmit the output torque of both an internal combustion engine and a rotating electric machine (a rotating electric machine other than the rotating electric machine 1 provided in the vehicle drive device 100) to a pair of wheels to be driven.
- the drive device other than the vehicle drive device 100 can also be a drive device with the same configuration as the vehicle drive device 100.
- the vehicle drive device 100 includes a rotating electric machine 1, a pair of output members 6 each drivingly connected to a pair of wheels W (see FIG. 1), a transmission mechanism 3 that transmits driving force between the rotating electric machine 1 and the pair of output members 6, and an inverter device 90 that drives and controls the rotating electric machine 1.
- the vehicle drive device 100 further includes a case 2 that houses the rotating electric machine 1 and the inverter device 90.
- the case 2 also houses the pair of output members 6 and the transmission mechanism 3.
- the first output member 61 which is one of the pair of output members 6, is drivingly connected to the first wheel W1, which is one of the pair of wheels W
- the second output member 62 which is the other of the pair of output members 6, is drivingly connected to the second wheel W2, which is the other of the pair of wheels W.
- the vehicle VC on which the vehicle drive device 100 is mounted includes a first drive shaft 63 that rotates integrally with the first wheel W1 and a second drive shaft 64 that rotates integrally with the second wheel W2.
- the first drive shaft 63 is connected to the first wheel W1 via, for example, a constant velocity joint
- the second drive shaft 64 is connected to the second wheel W2 via, for example, a constant velocity joint.
- the first output member 61 is connected to the first drive shaft 63 so as to rotate integrally with the first drive shaft 63
- the second output member 62 is connected to the second drive shaft 64 so as to rotate integrally with the second drive shaft 64.
- the vehicle drive device 100 transmits the output torque of the rotating electric machine 1 to a pair of wheels W via a pair of output members 6 to drive the vehicle VC on which the vehicle drive device 100 is mounted. That is, the rotating electric machine 1 is a driving force source for the pair of wheels W.
- the pair of wheels W is a pair of left and right wheels on the vehicle VC (for example, a pair of left and right front wheels, or a pair of left and right rear wheels).
- the rotating electric machine 1 may be, for example, an AC rotating electric machine driven by three-phase AC.
- the rotating electric machine 1 is electrically connected to a battery BA (including a storage device such as a capacitor) via an inverter device 90 that converts power between DC power and AC power, and receives power from the battery BA to drive the vehicle, or supplies power generated by the inertial force of the vehicle VC to the storage device for storage.
- a battery BA including a storage device such as a capacitor
- an inverter device 90 that converts power between DC power and AC power, and receives power from the battery BA to drive the vehicle, or supplies power generated by the inertial force of the vehicle VC to the storage device for storage.
- the rotating electric machine 1 and the pair of output members 6 are arranged on two parallel axes (specifically, a first axis C1 and a second axis C2). Specifically, the rotating electric machine 1 is arranged on the first axis C1, and the pair of output members 6 are arranged on a second axis C2 different from the first axis C1.
- the first axis C1 and the second axis C2 are axes (virtual axes) arranged parallel to each other.
- the transmission mechanism 3 includes an output gear (ring gear) 30 that is drivingly connected to at least one of the pair of output members 6, and is coaxial with the pair of output members 6 (i.e., on the second axis C2).
- the vehicle drive device 100 is mounted on the vehicle VC with the axial direction A oriented along the vehicle left-right direction.
- the axial direction A is parallel to the first axis C1 and the second axis C2, in other words, the axial direction is common between the first axis C1 and the second axis C2. That is, the axial direction A is the direction in which the rotation axis of the rotating electric machine 1 extends, and is also the direction in which the rotation axis of the pair of output members 6 extends.
- one side of the axial direction A is the axial first side A1
- the other side of the axial direction A (the side opposite to the axial first side A1 in the axial direction A) is the axial second side A2.
- the axial first side A1 is the side on which the rotating electric machine 1 is disposed relative to the transmission mechanism 3 in the axial direction A.
- the first output member 61 is the output member 6 disposed on the axial first side A1 of the pair of output members 6, and the second output member 62 is the output member 6 disposed on the axial second side A2 of the pair of output members 6.
- the vehicle drive device 100 may be mounted on the vehicle VC with the first axial side A1 facing the right side of the vehicle and the second axial side A2 facing the left side of the vehicle.
- the first wheel W1 to which the first output member 61 is drivingly connected is the right wheel
- the second wheel W2 to which the second output member 62 is drivingly connected is the left wheel.
- FIG. 1 assumes that the vehicle drive device 100 is a front-wheel drive type drive device that drives a pair of left and right front wheels. Therefore, in the example shown in FIG. 1, the first wheel W1 is the right front wheel, and the second wheel W2 is the left front wheel.
- the rotating electric machine 1 includes a rotor 10 and a stator 11.
- the stator 11 is fixed to a case 2, and the rotor 10 is supported by the case 2 so as to be rotatable relative to the stator 11.
- the rotating electric machine 1 may be an inner rotor type rotating electric machine, in which case the rotor 10 may be arranged radially inside the stator 11 so as to overlap with the stator 11 when viewed radially along the radial direction.
- the radial direction here is the radial direction based on the first axis C1, in other words, the radial direction based on the rotation axis of the rotating electric machine 1.
- the stator 11 includes a stator core 12 and coil end portions 13 that protrude from the stator core 12 in the axial direction A.
- a coil is wound around the stator core 12, and the portion of the coil that protrudes from the stator core 12 in the axial direction A forms the coil end portions 13.
- the coil end portions 13 are formed on both sides of the stator core 12 in the axial direction A.
- the transmission mechanism 3 includes a reduction mechanism 34 in the power transmission path between the rotating electric machine 1 and the output gear 30.
- the reduction mechanism 34 is optional and may include a reduction mechanism using a counter gear, a reduction mechanism using a planetary gear, or the like.
- the reduction mechanism 34 includes a planetary gear mechanism, and the reduction mechanism 34 is arranged coaxially with the rotating electric machine 1.
- the output gear (carrier) 342 of the reduction mechanism 34 radially meshes with the output gear 30 of the differential gear mechanism 5.
- Such a vehicle drive device 100 can have a compact configuration consisting of two shafts (first shaft C1 and second shaft C2). In a modified example, the vehicle drive device 100 may have three or more shafts (described later with reference to FIG. 11).
- the reduction mechanism 34 is arranged coaxially with the rotating electric machine 1 (i.e., on the first axis C1) in a manner that is drivingly connected to the rotating electric machine 1.
- the input member 16 that meshes with the sun gear 341 of the reduction mechanism 34 is connected to the rotor 10 so as to rotate integrally with the rotor 10.
- the vehicle drive device 100 has a rotor shaft 15 to which the rotor 10 is fixed, and the input member 16 is connected to the rotor shaft 15 so as to rotate integrally with the rotor shaft 15.
- a portion of the input member 16 on the first axial side A1 may be connected (here, spline connected) to a portion of the second axial side A2 of the rotor shaft 15.
- the rotor shaft 15 of the vehicle drive device 100 and the input member 16 may be configured to be integrally formed as a single piece.
- the transmission mechanism 3 further includes a differential gear mechanism 5.
- the differential gear mechanism 5 distributes the driving force transmitted from the rotating electric machine 1 to a pair of output members 6.
- the differential gear mechanism 5 may be arranged coaxially with the pair of output members 6 (i.e., on the second axis C2).
- the differential gear mechanism 5 distributes the driving force transmitted from the rotating electric machine 1 to the output gear 30 to the pair of output members 6.
- the output gear 30 is drivingly connected to both of the pair of output members 6 via the differential gear mechanism 5.
- the differential gear mechanism 5 may be a bevel gear type differential gear mechanism, and the output gear 30 may be connected to a differential case portion 50 of the differential gear mechanism 5 so as to rotate integrally with the differential case portion 50.
- the differential gear mechanism 5 distributes the rotation of the output gear 30 to the first side gear 51 and the second side gear 52.
- the first side gear 51 rotates integrally with the first output member 61
- the second side gear 52 rotates integrally with the second output member 62.
- the first side gear 51 may be formed as a member separate from the member (here, the shaft member) constituting the first output member 61, and may be connected (here, spline-connected) to the first output member 61 so as to rotate integrally with the first output member 61.
- At least a portion of the first axial side A1 of the first output member 61 is formed in a tubular shape (specifically, a cylindrical shape) extending in the axial direction A, and the first drive shaft 63 (see FIG. 1) may be inserted into the interior (space surrounded by the inner circumferential surface) of the first output member 61 from the first axial side A1.
- the second side gear 52 may be connected to the second output member 62.
- the second output member 62 may be realized by the second drive shaft 64.
- the output gear 30 of the differential gear mechanism 5 is preferably positioned near the end of the case 2 on the second axial side A2.
- a gear (not shown) of the reduction mechanism 34 that meshes with the output gear 30 may be positioned closest to the second axial side A2 of the reduction mechanism 34.
- the output gear 30 can be positioned closer to the second axial side A2 of the entire vehicle drive device 100.
- the rotating electric machine 1 of the vehicle drive device 100 may have the largest physical size in the second direction when viewed in the axial direction.
- the physical size of the rotating electric machine 1 is determined according to the required output, etc. Therefore, in order to reduce the physical size of the vehicle drive device 100 as a whole in the second direction, it is useful to arrange the main components of the vehicle drive device 100 (main components other than the rotating electric machine 1) so that they overlap the rotating electric machine 1 when viewed in the first direction X.
- the vehicle drive device 100 includes an output gear 30 having a relatively large outer diameter
- the positional relationship between the output gear 30 and the rotating electric machine 1 can significantly affect the physical size of the vehicle drive device 100 as a whole in the second direction.
- a pair of output members 6 concentric with the central axis of the output gear 30 is preferably arranged so as to overlap the rotor shaft 15 of the vehicle drive device 100 when viewed in the first direction.
- the output gear 30 and the rotating electric machine 1 may be set in a positional relationship with respect to each other so that the outer shape (e.g., a circular outer shape portion) of the output member 6 overlaps the outer shape (e.g., a circular outer shape portion) of the rotor shaft 15 when viewed in the first direction.
- the overall physical size of the vehicle drive device 100 in the second direction is substantially determined by the physical size of the rotating electric machine 1 (and therefore the physical size of the motor case portion 21), it is possible to minimize the overall physical size of the vehicle drive device 100 in the second direction under the same physical size of the rotating electric machine 1.
- the case 2 includes a motor case portion 21, a transmission mechanism case portion 22, an output shaft case portion 23, and an inverter case portion 24, all integrated together.
- integrated includes an integrated form using fastening members such as bolts, and an integrated form formed by integral molding (for example, casting or casting using aluminizing, etc.).
- the motor case portion 21 forms the motor housing chamber S1 that houses the rotating electric machine 1
- the transmission mechanism case portion 22 forms the transmission mechanism housing chamber S2 that houses the transmission mechanism 3
- the output shaft case portion 23 forms the output shaft housing chamber S3 that houses the first output member 61
- the inverter case portion 24 forms the inverter housing chamber S4 that houses the inverter device 90.
- the motor case portion 21 forms the motor housing chamber S1
- the transmission mechanism housing chamber S2, the output shaft case portion 23, and the inverter case portion 24 is true for the transmission mechanism housing chamber S2, the output shaft case portion 23, and the inverter case portion 24.
- the motor case portion 21 has a cylindrical shape that corresponds to the external shape of the rotating electric machine 1. However, the motor case portion 21 does not need to have the entire cylindrical outer periphery closed.
- the motor housing chamber S1 and the output shaft housing chamber S3 may be in communication, in which case the side of the motor case portion 21 facing the output shaft housing chamber S3 does not need to have a wall portion formed.
- the transmission mechanism case portion 22 is provided on the second axial side A2 relative to the motor case portion 21 and the output shaft case portion 23.
- the output shaft case portion 23 is provided on the second axial side X2 relative to the motor case portion 21.
- the inverter case portion 24 is provided above the transmission mechanism case portion 22 and the output shaft case portion 23. Details of the inverter case portion 24 will be described later.
- the first output member 61 can be more effectively protected from the external environment (e.g., flying stones, etc.) than when the first output member 61 is provided outside the case 2. In addition, the clearance that must be secured between the first output member 61 and surrounding components can be reduced. However, in a modified example, the first output member 61 may be provided outside the case 2.
- the case 2 may be formed by joining multiple members (case members and cover members). Therefore, one case member forming the case 2 may form two or more case members among the motor case portion 21, the transmission mechanism case portion 22, the output shaft case portion 23, and the inverter case portion 24.
- the motor housing chamber S1, the transmission mechanism housing chamber S2, and the output shaft housing chamber S3 formed by the case 2 may be completely isolated from each other, may be partially connected, or may be shared without a boundary.
- the motor housing chamber S1 and the output shaft housing chamber S3 may be shared without a partition wall separating them.
- the rotating electric machine 1 and the first output member 61 are housed in a common housing chamber (specifically, the motor housing chamber S1 and the output shaft housing chamber S3) formed by the case 2.
- the motor housing chamber S1 and the inverter housing chamber S4 may be separated, but if the rotating electric machine 1 is water-cooled, the motor housing chamber S1 and the inverter housing chamber S4 do not have to be separated.
- the inverter accommodation chamber S4 is separated from the motor accommodation chamber S1 and the transmission mechanism accommodation chamber S2 by a partition wall portion 29.
- the partition wall portion 29 forms the bottom of the inverter accommodation chamber S4 (the boundary portion on the second side Y2 in the second direction).
- the case 2 is formed by joining a case member 200, a motor cover member 201, a differential cover member 202, and an inverter cover member 203.
- the joining method may be fastening with bolts or the like.
- the case member 200 may be formed as a one-piece member (e.g., a single member made of a common material formed by a die casting method).
- the motor housing chamber S1 and the transmission mechanism housing chamber S2 may be separated by a single partition wall 26.
- the case member 200 opens in the axial direction A on the first axial side A1 and also opens in the axial direction A on the second axial side A2.
- the motor cover member 201 is provided so as to cover the opening on the first axial side A1 of the case member 200 (i.e., the opening on the first axial side A1 of the motor accommodating chamber S1).
- the motor cover member 201 may be formed as a one-piece member.
- the motor cover member 201 may be joined to the end face (joint surface) of the first axial side A1 of the case member 200.
- the joint surface (mating surface) 221 between the motor cover member 201 and the case member 200 may extend in a plane perpendicular to the axial direction A.
- the differential cover member 202 is arranged to cover the opening on the second axial side A2 of the case member 200 (i.e., the opening on the second axial side A2 of the transmission mechanism housing chamber S2).
- the differential cover member 202 may be formed as a one-piece member.
- the differential cover member 202 may be joined to the end face (joint surface) of the second axial side A2 of the case member 200.
- the joint surface (mating surface) 222 between the differential cover member 202 and the case member 200 may extend in a plane perpendicular to the axial direction A.
- the inverter cover member 203 is provided to cover the opening of the inverter storage chamber S4 in the case member 200.
- the inverter cover member 203 may be disposed to face the partition wall portion 29 in the second direction Y.
- the inverter cover member 203 may be formed as a one-piece member.
- the inverter device 90 includes a power module PM (described below), a control board 98 (see FIG. 3C), a smoothing capacitor CM (described below) that smoothes the voltage between the positive and negative poles of the DC side of the inverter circuit, and a bus bar module 70.
- the inverter device 90 may further include various sensors such as a current sensor, a filter such as a Y capacitor (see Y capacitor CM2 in FIG. 10), various wiring (including connectors, etc.), etc.
- the control board 98 is mounted with a control device that controls the inverter circuit formed by the power module PM, sensors, etc.
- the control board 98 may be, for example, a multi-layer board.
- the control board 98 may be oriented such that the second direction Y is the normal direction to the board surface.
- the control board 98 may be arranged in such a manner that it covers the power module PM and the smoothing capacitor CM from the first side Y1 in the second direction, as shown in FIG. 3C.
- the control board 98 may be supported directly by the partition section 29, or may be supported by the partition section 29 via the power module PM and the smoothing capacitor CM.
- the control board 98 extends into the inverter accommodating chamber S4. That is, the control board 98 extends further toward the second side Y2 in the second direction than the end face of the side wall portion 240 on the first side Y1 in the second direction, which will be described later.
- the control board 98 is arranged to cover mainly the power module PM and the smoothing capacitor CM from the first side Y1 in the second direction, but it may also be arranged to cover the power module PM and the bus bar module 70 from the second side Y2 in the second direction.
- the control board 98 may also be formed of two or more boards.
- the power module PM may be in the form of a module in which multiple switching elements (power semiconductor elements, not shown) that make up the inverter circuit are molded with resin.
- the power module PM is fixed to the partition wall portion 29 by fasteners BT2 such as bolts.
- the power module PM is in the form of a module that includes a plurality of switching elements that constitute an inverter circuit and a portion of a water channel forming member that cools the plurality of switching elements.
- the power module PM includes a heat dissipation plate 99, which forms a cooling water channel 80 for cooling a plurality of switching elements (power semiconductor elements, not shown) that constitute the inverter circuit.
- the heat dissipation plate 99 forms the cooling water channel 80 between the heat dissipation plate 99 and the partition wall portion 29. That is, the heat dissipation plate 99 cooperates with a portion of the partition wall portion 29 to form the cooling water channel 80. Cooling water is circulated through the cooling water channel 80.
- the heat dissipation plate 99 preferably has a plurality of fins 991 that protrude in the second direction Y toward the second side Y2 in the second direction. This allows the heat dissipation efficiency to be improved.
- the smoothing capacitor CM may be in the form of a module in which multiple capacitor elements and terminals are molded with resin.
- the smoothing capacitor CM is fixed to the partition wall 29 by fasteners BT3 such as bolts.
- the busbar module 70 is a wiring section that electrically connects the rotating electric machine 1 and the power module PM.
- the busbar module 70 may be in the form of a module, and is fixed to the partition section 29 by a fastener BT1 such as a bolt.
- the busbar module 70 is in the form of a module integrated with the current sensor module 77, and is also directly fastened to the partition section 29 with the current sensor module 77.
- the busbar module 70 may be directly fastened to the partition section 29 separately from the current sensor module 77.
- the current sensor module 77 includes three current sensors that detect the current flowing through each of the three-phase bus bars of the busbar module 70.
- the current sensors may be, for example, coreless current sensors.
- the coreless current sensor can be made smaller by the amount that it does not have a magnetic core, and can contribute to the miniaturization of the current sensor module 77.
- the current sensor module 77 may be in the form of, for example, a primary conductor, a magnetic sensor, and an IC (for example, an ASIC: application-specific integrated circuit) packaged with an insulating material.
- a member being "directly" fastened to the partition 29 refers to a state in which the member is fastened to the partition 29 without going through another member.
- the busbar module 70 includes, for each phase of the rotating electric machine 1, a first terminal portion 71 connected to a power line (not shown) of the rotating electric machine 1, a second terminal portion 72 electrically connected to the power module PM, and a busbar 73 extending between the first terminal portion 71 and the second terminal portion 72. Further details of the busbar module 70 will be described later.
- the power module PM, smoothing capacitor CM, and bus bar module 70 are fastened directly to the partition portion 29 at respective fastening positions that do not overlap with each other when viewed in the second direction Y. That is, the fasteners BT1 to BT3 do not overlap with each other when viewed in the second direction Y.
- Each fastener BT1 to BT3 has an axial portion aligned with the second direction Y, and is fastened in a manner that advances along the second direction Y to the second side Y2 when fastened.
- the power module PM, smoothing capacitor CM, and busbar module 70 can be arranged in a manner that does not overlap with each other when viewed in the second direction Y.
- the power module PM, smoothing capacitor CM, and busbar module 70 can be arranged in different areas of the partition wall 29 in terms of their electrical connection portions (e.g., the terminal side busbar 721 shown in FIG. 5, etc.).
- This allows the size of the inverter device 90 in the second direction Y to be reduced compared to when, for example, at least any two of the power module PM, smoothing capacitor CM, and busbar module 70 are stacked in the second direction Y.
- the size of the case 2 (and therefore the vehicle drive device 100) in the second direction Y can be reduced.
- the power module PM, smoothing capacitor CM, and busbar module 70 can each be directly fastened to the partition 29 independently, thereby improving work efficiency during assembly.
- the power module PM, smoothing capacitor CM, and busbar module 70 can each be removed independently from the partition 29, which improves maintainability.
- the power module PM, smoothing capacitor CM, and busbar module 70 are electrically connected between the rotating electric machine 1 and the connector CN1 via the fasteners BT11 to BT14.
- Each fastener BT11 to BT14 has an axis along the second direction Y, and is fastened in such a manner that it advances along the second direction Y to the second side Y2 when fastened.
- Each fastener BT11 to BT14 is fastened at a respective fastening position that does not overlap with each other when viewed in the second direction Y.
- the fastener BT11 fastens the electrical connection between the busbar module 70 and the rotating electric machine 1 (the electrical connection between the busbar 73 and the first terminal portion 71).
- the fastener BT12 fastens the electrical connection between the busbar module 70 and the power module PM.
- the busbar terminal on the busbar module 70 side (the end of the terminal side busbar 721 in FIG. 5) and the busbar terminal 750 on the power module PM side are shown typically.
- the fastener BT13 fastens the electrical connection between the power module PM and the smoothing capacitor CM.
- the busbar terminal 752 on the power module PM side and the busbar terminal 754 on the smoothing capacitor CM side are shown typically.
- FIG. 3B shows a schematic diagram of a busbar terminal 756 on the smoothing capacitor CM side and a busbar terminal 758 on the connector CN1 side.
- the fasteners BT11 to BT14 related to the electrical connection parts in the inverter device 90 overlap each other when viewed in a direction perpendicular to the second direction Y, as shown in FIG. 3B for the fasteners BT12 to BT14. That is, the extension ranges R300 of the fasteners BT11 to BT14 in the second direction Y overlap each other. As a result, some of the fastening parts related to the fasteners BT11 to BT14 do not significantly protrude toward the second direction first side Y1, reducing the possibility of an increase in size in the Y direction due to some of the fastening parts.
- fasteners BT11 to BT14 can be fastened under approximately the same conditions, improving production efficiency and facilitating torque management during tightening.
- the overlapping parts between the fasteners BT11 to BT14 may be at least partial, but may also be effective thread parts, for example.
- FIG. 5 is a perspective view of the second terminal portion 72 of the busbar module 70 of the vehicle drive device 100 of this embodiment.
- the inverter device 90 is accommodated in the inverter accommodation chamber S4 of the inverter case portion 24.
- the inverter device 90 mainly includes a power module PM, a smoothing capacitor CM, and a bus bar module 70, and in FIG. 3, the arrangement area of the power module PM and the smoothing capacitor CM is indicated by the area 300 enclosed by a dashed line.
- the inverter case portion 24 is arranged so as to overlap the first axis C1 and the second axis C2 when viewed from above (as viewed in the second direction Y, the same applies below).
- the inverter storage chamber S4 includes a first storage section S41, a second storage section S42, and a third storage section S43.
- first storage section S41 a part or all of the space between lines P1 and P2 in the vertical direction, in which no components other than the inverter case section 24 are arranged, is also referred to as "dead space.”
- the inverter accommodating chamber S4 has an L-shape as seen from above, as shown in FIG. 3. Specifically, if the X-direction center is between the first axis C1 and the second axis C2 in the X-direction, the inverter accommodating chamber S4 extends on both sides of the X-direction center in a manner straddling the X-direction center. Also, if the A-direction center is between the rotating electric machine 1 and the reduction mechanism 34 in the A-direction, the inverter accommodating chamber S4 extends on both sides of the A-direction center in a manner straddling the A-direction center on the first direction second side X2. On the other hand, the inverter accommodating chamber S4 extends only to the axial second side A2 from the A-direction center on the first direction first side X1.
- the first storage section S41, the second storage section S42, and the third storage section S43 are arranged in an L-shape as a whole when viewed from above, as shown in FIG. 3.
- the first storage section S41 overlaps the first axis C1 (i.e., the reduction mechanism 34) on the second axial side A2 when viewed from above, and overlaps the rotating electric machine 1 when viewed in the axial direction A.
- the second storage section S42 overlaps the second axis C2 when viewed from above, and overlaps the rotating electric machine 1 when viewed in the first direction X.
- the third storage section S43 is adjacent to the first storage section S41 and the second storage section S42, and overlaps the second axis C2 when viewed from above.
- the third storage section S43 may be integrally connected to the first storage section S41 and the second storage section S42.
- the first storage section S41, the second storage section S42, and the third storage section S43 are arranged above a plane PL10 including the first axis C1, which is the axis of the rotating shaft of the rotating electric machine 1, and the second axis C2, which is the axis of the output member 6.
- the offset amount in the second direction Y between the central axis of the output gear 30 (i.e., the second axis C2) and the central axis of the rotating electric machine 1 (i.e., the first axis C1) is set to be relatively small, so that the plane PL10 is close to a horizontal plane.
- the first accommodating portion S41, the second accommodating portion S42, and the third accommodating portion S43 are preferably formed so as not to affect the size of the case 2 as a whole in the second direction Y, in order to prevent an increase in the size of the case 2 as a whole.
- the size of the case 2 as a whole in the second direction Y is determined by the size of the rotating motor 1 in the second direction Y (see lines P0 and P2 in Figure 4), and specifically, by the size of the motor case portion 21 in the second direction Y.
- the first accommodating portion S41, the second accommodating portion S42, and the third accommodating portion S43 are positioned on the second direction second side Y2 of the motor case portion 21, further on the second direction second side Y1 than the position (see line P2 in Figure 4) closest to the second direction first side Y1.
- the case 2 includes a side wall portion 240 that defines a boundary between the inverter accommodating chamber S4 (the first accommodating portion S41, the second accommodating portion S42, and the third accommodating portion S43) and the motor accommodating chamber S1 in a direction perpendicular to the second direction Y, and the side wall portion 240 extends toward the second side Y2 in the second direction from the highest position (line P2) of the motor case portion 21.
- the size of the case 2 as a whole in the second direction Y can be reduced.
- the end surface of the second direction first side Y1 of the side wall portion 240 may extend in the same plane perpendicular to the second direction Y and may form a mating surface to which the inverter cover member 203 is attached.
- the inverter cover member 203 may also be disposed toward the second side Y2 in the second direction from the highest position (line P2) of the motor case portion 21.
- the boundary between the inverter housing chamber S4 and the motor housing chamber S1 in a direction perpendicular to the second direction Y means a mode in which a boundary between the inverter housing chamber S4 and the motor housing chamber S1 is formed in a direction perpendicular to the second direction Y (the X direction, the A direction, or any combination of these directions).
- the boundary position (the boundary position in the X direction, the boundary position in the A direction, or the boundary position in any combination of these directions) does not need to be constant at each position along the second direction Y.
- the X direction position of the side wall portion of the side wall portion 240 that bounds the second housing portion S42 to the motor housing chamber S1 may be located closer to the X1 side as it approaches the Y1 side along the second direction Y, in accordance with the outer shape of the rotating electric machine 1.
- first storage portion S41, the second storage portion S42, and the third storage portion S43 are preferably disposed between both end faces of the case member 200 in the axial direction A. That is, the first storage portion S41, the second storage portion S42, and the third storage portion S43 are preferably disposed so that they are substantially entirely contained between the joint surface (mating surface) 221 between the motor cover member 201 and the case member 200 and the joint surface (mating surface) 222 between the differential cover member 202 and the case member 200 in the axial direction A. In this case, it becomes easy to dispose the first storage portion S41, the second storage portion S42, and the third storage portion S43 in a manner that does not affect the physical size in the axial direction A.
- the first storage section S41, the second storage section S42, and the third storage section S43 are preferably formed so as not to affect the size of the case 2 as a whole in the first direction X, in order to prevent an increase in the size of the case 2 as a whole.
- the boundary (shape) of the first direction second side X2 of the size of the case 2 as a whole in the first direction X is determined by the size of the differential gear mechanism 5, and more specifically, may be determined by the size of the transmission mechanism case section 22 in the first direction X.
- the boundary (shape) of the first direction first side X1 of the size of the case 2 as a whole in the first direction X may be determined by the size of the rotating electric machine 1.
- the vehicle drive device 100 it is possible to reduce the overall size of the vehicle drive device 100 in the first direction X and the second direction Y, that is, it is possible to reduce the dimensions of the vehicle drive device 100 when viewed in the axial direction. This makes it possible to improve the mountability of the vehicle drive device 100 in the vehicle VC.
- the dimensions of the first and third storage sections S41 and S43 in the second direction Y may be arbitrary and the same as long as the first and third storage sections S41 and S43 are arranged on the second side Y2 in the second direction from the line P2 described above.
- the first and third storage sections S41 and S43 may be determined in different ways depending on the components (described later) of the inverter device 90 that they each accommodate.
- the dimensions of the third storage section S43 in the second direction Y may be preferably set larger than the same dimension of the motor storage chamber S1.
- the second storage section S42 and the third storage section S43 can be formed by efficiently utilizing the space around the second axis C2 and on the second side Y2 in the second direction from the line P2.
- the dimensions in the second direction Y of the first housing section S41, the second housing section S42, and the third housing section S43 may be arbitrary and may be the same, as long as the first housing section S41, the second housing section S42, and the third housing section S43 are located on the second side Y2 in the second direction from the highest position (line P2) of the motor case section 21.
- the dimensions in the second direction Y of the first housing section S41, the second housing section S42, and the third housing section S43 may be determined in different ways depending on the components (described later) of the inverter device 90 to be accommodated.
- the components to be arranged in the first housing section S41, the second housing section S42, and the third housing section S43 may be determined depending on the maximum dimensions in the second direction Y that can be secured in the first housing section S41, the second housing section S42, and the third housing section S43, respectively.
- the busbar module 70 is arranged in the first accommodating section S41, the smoothing capacitor CM is arranged in the second accommodating section S42, and the power module PM is arranged in the third accommodating section S43.
- the busbar module 70 and the power module PM are adjacent to each other in the first direction X, and the power module PM and the smoothing capacitor CM are adjacent to each other in the axial direction A.
- first accommodating section S41, the second accommodating section S42, and the third accommodating section S43 do not need to be precise, and for example, a portion of the axial first side A1 of the power module PM may be arranged in the second accommodating section S42, and a portion of the first axial first side X1 of the power module PM may be arranged in the first accommodating section S41.
- the busbar module 70, the power module PM, and the smoothing capacitor CM overlap with the rotating electric machine 1 when viewed in a direction perpendicular to the second direction Y.
- the reduction mechanism 34 arranged on the second side Y2 in the second direction of the first housing portion S41 includes a planetary gear mechanism, and the mounting space around the first axis C1 (mounting space for the reduction mechanism 34) is relatively large. For example, if we limit the mounting space to the first axial side A1 of the output gear 30 of the differential gear mechanism 5, the mounting space for the differential gear mechanism 5 tends to be smaller than the mounting space for the planetary gear mechanism.
- the busbar module 70 which requires a relatively small mounting space (dimension) in the second direction Y, is arranged in the first accommodation section S41.
- the busbar module 70 is arranged such that the first terminal portions 71 of the three phases are aligned in the first direction X, and the busbars 73 of the three phases extend in the axial direction A in a manner that does not overlap with each other (aligned in the first direction X) when viewed in the up-down direction.
- the ends of the first axial side A1 of the busbars 73 of the three phases are connected to the first terminal portions 71 by fasteners BT11. This allows the busbars 73 of the three phases to be easily arranged even if the dimension of the dead space in the second direction Y in the mounting range is relatively small. As a result, the case 2 can be made more compact.
- the first terminal portion 71 is formed in a manner that penetrates the part of the side wall portion 240 that separates the motor housing chamber S1 and the first housing portion S41 in the axial direction A (see the first terminal portion 71 represented by the dotted line in FIG. 4, etc.).
- This allows the power line (three-phase wiring) of the rotating electric machine 1 to be taken out from the motor housing chamber S1 to the inverter housing chamber S4 in a relatively short distance, and the wiring space can be reduced compared to the case where the power line is taken out to the inverter housing chamber S4 via the output shaft housing chamber S3, etc.
- the case 2 can be made smaller. As shown in FIG.
- the first terminal portion 71 overlaps the rotating electric machine 1 together with the bus bar 73 when viewed in the axial direction (i.e., it is arranged in the above-mentioned dead space). Furthermore, the first terminal portion 71 and the bus bar 73 do not overlap the output member 6 when viewed in the second direction Y. In FIG. 4, the position of the first terminal portion 71 when viewed in the axial direction is typically shown by a dotted line.
- the size (radial size) of the output gear 30 when viewed in the axial direction is significantly larger than the size of the output member 6, so that dead space (space on the second side Y2 in the second direction from line P2) is more likely to be formed around the second axis C2 on the first axial side A1 than on the second axial side A2. Therefore, the dimension in the second direction Y of the second storage section S42 (for example, the maximum dimension or average dimension) can be set larger than the same dimension of the third storage section S43.
- the smoothing capacitor CM is placed in the second housing section S42, and the power module PM is placed in the third housing section S43.
- the dead space around the second axis C2 and on the second side Y2 in the second direction of the line P2 can be efficiently utilized to efficiently arrange the smoothing capacitor CM and the power module PM.
- the connector CN1 for the high-voltage system wiring (power supply system wiring) for the inverter device 90 to receive power supply from the high-voltage battery BA may be provided on the first axial side A1 of the second storage section S42 as shown in FIG. 3. That is, the connector CN1 may be provided on a portion of the side wall portion 240 that borders the first axial side A1 of the second storage section S42. In this case, a current path from the high-voltage battery BA to the rotating electric machine 1 via the smoothing capacitor CM, the power module PM, and the bus bar module 70 can be efficiently set.
- the current path from the high-voltage battery BA to the rotating electric machine 1 is a C-shaped path (a path in the axial direction A on the first direction second side X2, a path in the first direction X on the axial direction second side A2, and a path in the axial direction A on the first direction first side X1) when viewed in the second direction Y.
- the connector CN1 may be disposed in a portion of the side wall 240 that borders the second side X2 in the first direction of the second housing portion S42 (i.e., the second side X2 in the first direction and the first side A1 in the axial direction of the inverter case portion 24). In this case as well, an efficient path that is substantially free of unnecessary paths such as folds can be realized.
- the dead space around the second axis C2 gradually increases from the second axial side A2 toward the first axial side A1. Therefore, the dimension in the second direction Y of the inverter case section 24 (particularly the second housing section S42 and the third housing section S43) of the inverter device 90 can also be gradually increased from the second axial side A2 toward the first axial side A1 without changing the position of the inverter case section 24 on the most second direction first side Y1.
- the various components of the inverter device 90 may be arranged in the second housing section S42 and the third housing section S43 of the inverter case section 24 in such a manner that the components located on the first axial side A1 have a larger dimension in the second direction Y than the components located on the second axial side A2.
- the smoothing capacitor CM since the smoothing capacitor CM has a larger dimension in the second direction Y than the power module PM, the smoothing capacitor CM is arranged in the second housing section S42, and the power module PM is arranged in the third housing section S43.
- the output gear 30 tends to be the largest among the components of the differential gear mechanism 5 in terms of size around the second axis C2. Therefore, when the output gear 30 of the differential gear mechanism 5 is positioned closer to the second axial side A2, the space around the second axis C2 on the first axial side A1 than the output gear 30 can be secured in a manner that is relatively wide in the radial direction and continuous in the axial direction A, allowing the other components to be positioned efficiently.
- the second terminal portion 72 is disposed on the first axial side A1 relative to the output gear 30, and is connected to the power module PM on the second axial side A2 of the power module PM.
- the case 2 can be made more compact.
- the second terminal portion 72 may have a terminal side bus bar 721 for each of the three phases inside the resin portion 722.
- the terminal side bus bar 721 extends in the first direction X, with the end on the first side X1 of the first direction joined to each of the three-phase bus bars 73 and the end on the second side X2 of the first direction joined to the terminal portion on the power module PM side.
- the terminal side bus bar 721 may extend in the first direction X within the resin portion 722 with the perpendicular direction of the flat plate facing the axial direction A. In this case, the second terminal portion 72 can be arranged even if the space in the axial direction A is relatively small.
- the portion of the second terminal portion 72 on the second side X2 in the first direction faces the axial direction A perpendicular to the flat plate, only a relatively small space in the axial direction A (space corresponding to the thickness of the flat plate) is required, but a relatively large space in the second direction Y (the dimension in the width direction of the flat plate) is required.
- the portion of the second terminal portion 72 on the second side X2 in the first direction (the portion in the resin portion 722) can be efficiently arranged by utilizing the relatively large dead space in the second direction Y that is easier to secure on the first axial side A1 than the output gear 30.
- the portion of the second terminal portion 72 on the second side X2 in the first direction (the portion in the resin portion 722 described later) may be arranged on the first axial side A1 than the output gear 30 and near the axial position of the joint surface (mating surface) 222 between the differential cover member 202 and the case member 200 (for example, on the second axial side A2 or the first axial side A1 than the mating surface 222).
- the portion of the second terminal portion 72 on the second side X2 in the first direction can be efficiently arranged.
- the ends of the three bus bars 73 extending in the axial direction A on the second axial side A2 can be efficiently connected to the power module PM by using the second terminal portion 72 as described above.
- the dimension LX1 in the first direction X of the busbar module 70 is larger than the dimension LX2 in the first direction X of the power module PM, and the dimension LX2 in the first direction X of the power module PM is larger than the dimension LX3 in the first direction X of the smoothing capacitor CM.
- the second terminal portion 72 of the busbar module 70, the power module PM, and the smoothing capacitor CM can be arranged in the axial direction A from the second axial side A2 to the first axial side A1 in order of the length of the dimension in the first direction X.
- This arrangement allows the L-shaped region of the inverter accommodating chamber S4 to be efficiently used. Furthermore, by efficiently arranging the L-shaped region of the inverter accommodating chamber S4, the dimension (depth) in the second direction Y of the inverter accommodating chamber S4 can be minimized.
- the dimensions LX1 and the like of each module are the dimensions of the entire module, but may also be the dimensions of the main body (for example, the main body sealed with resin).
- the dimension LA0 in the axial direction A of the current sensor module 77 is smaller than the dimension LA2 in the axial direction A of the power module PM, which is smaller than the dimension LA3 in the axial direction A of the smoothing capacitor CM.
- This allows for an efficient module arrangement that is compatible with the L-shaped form of the inverter accommodating chamber S4 described above.
- the dimension LA3 in the axial direction A of the smoothing capacitor CM is relatively large, the dimension LA2 of the power module PM can be made relatively small so that the smoothing capacitor CM and the power module PM are arranged side by side in the axial direction A.
- the dimension LX2 in the first direction X of the power module PM relatively large, it is also easy to make the dimension LA3 of the power module PM relatively small.
- the dimension LA1 in the axial direction A of the busbar module 70 is larger than the dimension LA2 in the axial direction A of the power module PM, but the dimension (not shown) in the axial direction A of the busbar module 70 excluding the second terminal portion 72 may be approximately the same as the dimension LA2 in the axial direction A of the power module PM.
- FIG. 6 is a top view of the vehicle drive device 100A according to the first modified example
- FIG. 7 is a perspective view of the second terminal portion 72A of the bus bar module 70A of the vehicle drive device 100A according to the first modified example.
- the vehicle drive device 100A according to the first modified example is mainly different from the vehicle drive device 100 according to the above-described embodiment in that the bus bar module 70 is replaced with a bus bar module 70A.
- the busbar module 70A according to the first modified example differs from the busbar module 70A according to the embodiment described above mainly in that the second terminal portion 72 is replaced with a second terminal portion 72A.
- the busbar module 70A has three terminal side busbars 721A inside the resin portion 722A, and includes L-shaped portions arranged in a manner that does not overlap each other when viewed in the vertical direction.
- the terminal side busbar 721A of the second terminal portion 72A extends in the first direction X, and is connected or continuous with the end of the axial second side A2 of each of the three-phase busbars 73 on the first direction second side X2, and is connected to the power module PM on the first direction first side X1.
- the terminal side busbar 721A of the second terminal portion 72A and each of the three-phase busbars 73 form an L-shaped shape as a whole when viewed from above.
- the terminal side busbar 721A of the second terminal portion 72A and each of the three-phase busbars 73 may extend substantially in the same plane perpendicular to the second direction Y.
- the case 2A can be made smaller.
- the busbar module 70A (as well as the busbar module 70) may include a current sensor module 77A.
- the current sensor module 77A that detects the current of each phase may be arranged by utilizing the first housing portion S41.
- the busbar module 70A is essentially placed only in the first housing section S41.
- the second terminal section 72 which is a part of the busbar module 70, is placed in the third housing section S43.
- the busbar module 70 may be placed not only in the first housing section S41, but also by appropriately utilizing the third housing section S43.
- the first variant can also achieve the same effect as the above-mentioned embodiment.
- Figure 8 is a top view of the vehicle drive device 100B according to the second modified example.
- Figure 8A is a side view showing the vehicle drive device 100B according to the second modified example, viewed in the axial direction from the first axial side A1.
- the frame of the control board 98 is shown, and the view is perspective so that the components on the Y2 side of the control board 98 can be seen.
- the motor cover member 201 is omitted so that the state inside the motor accommodating chamber S1 can be seen, and the rotor of the rotating electric machine 1 is also omitted.
- the vehicle drive device 100B according to the second modified example is mainly different from the vehicle drive device 100 according to the above-described embodiment in that the bus bar module 70 is replaced with a bus bar module 70B.
- the busbar module 70B according to the second modification is mainly different from the busbar module 70 according to the embodiment described above in that the first terminal portion 71 is replaced with the first terminal portion 71B.
- the first terminal portion 71B is attached at a different position from the first terminal portion 71 according to the embodiment described above.
- the first terminal portion 71B is provided on the partition portion 29 instead of the side wall portion 240.
- the first terminal portion 71B has a bus bar (not shown) of each phase extending in the second direction Y in the motor housing chamber S1, and the bus bar is joined to the power line bus bar 89 of each phase from the rotating electric machine 1 side in the motor housing chamber S1 as shown in FIG. 8A.
- the power line bus bar 89 may have a fastening portion 892 extending radially inward at the coil end portion 13 on the A direction A2 side of the rotating electric machine 1 as shown in FIG. 8A.
- the first terminal portion 71B may be offset toward the second axial side A2 with respect to the side wall portion 240 of the first accommodation portion S41.
- the space between the first terminal portion 71B and the side wall portion 240 in the axial direction A of the inverter accommodation chamber S4 can be used to facilitate the routing of the low-voltage system wiring 150.
- the low-voltage system wiring 150 may electrically connect, for example, a sensor that detects the rotation angle of the rotating electric machine 1 to the control board 98.
- one end of the wiring 150 may be introduced into the motor accommodation chamber S1 or the transmission mechanism accommodation chamber S2 via a connector (not shown) in a through hole (hole in the second direction Y) of the partition portion 29, and the other end may be fixed to the control board 98 via a connector CN2.
- This second variant can also achieve the same effects as the above-mentioned embodiment.
- FIG. 9 is a top view of a vehicle drive device 100C according to a third modified example
- FIG. 10 is a diagram showing an example of an electrical circuit including a Y capacitor CM2.
- the main difference between the vehicle drive device 100C according to the third modified example is that the inverter device 90 is replaced with an inverter device 90C.
- the inverter device 90C according to the third modified example differs from the inverter device 90 according to the above-described embodiment in that a Y capacitor CM2 is added.
- the Y capacitor CM2 may be in the form of a module integrated with the smoothing capacitor CM. As shown in FIG. 9, the Y capacitor CM2 includes two capacitors C10 and C20. The capacitor C10 is electrically connected between the positive line and ground. The capacitor C20 is electrically connected between the negative line and ground.
- the Y capacitor CM2 is disposed between the smoothing capacitor CM and the connector CN1 in the axial direction A.
- the Y capacitor CM2 is fixed to the partition 29 by a fastener BT4 such as a bolt.
- the Y capacitor CM2 may be fixed to the partition 29 by the fastener BT4 in the form of a module integrated with the smoothing capacitor CM as described above.
- the Y capacitor CM2 may be fixed to the partition 29 by the fastener BT4 separately from the smoothing capacitor CM in the form of a module separate from the smoothing capacitor CM.
- the inverter device 90C according to the third modified example further differs from the inverter device 90 according to the above-described embodiment mainly in that the bus bar module 70 is replaced with a bus bar module 70C.
- the busbar module 70C according to the third modified example differs from the busbar module 70 according to the above-described embodiment mainly in that, in addition to the current sensor module 77, it is fixed to the partition section 29 by fasteners BT5 such as bolts.
- the fasteners BT1 to BT5 for fixing the inverter device 90C to the partition portion 29 do not overlap with each other when viewed in the second direction Y.
- the power module PM, smoothing capacitor CM, Y capacitor CM2, and bus bar module 70C are electrically connected between the rotating electric machine 1 and the connector CN1 via the fasteners BT11 to BT13, BT15, and BT16.
- the fastener BT15 fastens the electrical connection between the smoothing capacitor CM and the Y capacitor CM2
- the fastener BT16 fastens the electrical connection between the Y capacitor CM2 and the connector CN1.
- the fasteners BT11 to BT13, BT15, and BT16 do not overlap with each other when viewed in the second direction Y.
- the fasteners BT11 to BT13, BT15, and BT16 relating to the electrical connection parts in the inverter device 90C overlap each other when viewed in a direction perpendicular to the second direction Y, as described above for the fasteners BT11 to BT14 with reference to FIG. 3B.
- the extension ranges of the fasteners BT11 to BT13, BT15, and BT16 overlap each other in the second direction Y.
- the overlapping portions between the fasteners BT11 to BT13, BT15, and BT16 may be at least partial, but may be, for example, effective thread portions.
- the dimension of the smoothing capacitor CM in the second direction Y may be read as the dimension of the combination (total) of the smoothing capacitor CM and the Y capacitor CM2 in the second direction Y.
- the smoothing capacitor CM is arranged in the second housing portion S42 and the power module PM is arranged in the third housing portion S43, but this is not limited to this.
- the smoothing capacitor CM may be arranged in the third housing portion S43, and the power module PM may be arranged in the second housing portion S42.
- Such a configuration is suitable when the dimension in the second direction Y of the stacked structure including the power module PM is significantly larger than the dimension in the second direction Y of the smoothing capacitor CM.
- the vehicle drive device 100 (the same applies to the vehicle drive device 100A, etc.) has a two-shaft configuration with the first shaft C1 and the second shaft C2, but as mentioned above, this is not limited to this.
- a counter gear mechanism 4 may be used instead of the reduction mechanism 34.
- the counter gear mechanism 4 is provided so that the first counter gear 42 meshing with the gear 17 of the input member 16 from the rotating electric machine 1 and the second counter gear 43 meshing with the output gear 30 of the differential gear mechanism 5 rotate integrally with the counter shaft 41.
- the second counter gear 43 may be formed with a smaller diameter than the first counter gear 42.
- a three-shaft configuration including the third shaft C3 is formed.
- the configuration of the case 2 according to the above-mentioned embodiment can be similarly applied to such a three-shaft configuration.
- the smoothing capacitor CM is arranged at approximately the same position in the first direction X as the power module PM, but this is not limited to this.
- the smoothing capacitor CM may be arranged partially or entirely on the second side X2 in the first direction relative to the power module PM.
- the smoothing capacitor CM may be arranged on the side surface of the case 2 on the second side X2 in the first direction.
- the busbar module 70 is arranged in the first housing portion S41, the smoothing capacitor CM is arranged in the second housing portion S42, and the power module PM is arranged in the third housing portion S43, but this is not limited to the above.
- the power module PM may be arranged in the first housing portion S41.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
Description
前記回転電機と車輪との間に駆動連結される伝達機構と、
パワー半導体素子を有し、前記回転電機に複数相の交流電力を供給するパワーモジュールと、
前記パワーモジュールと電源との間に電気的に接続される平滑コンデンサを含むコンデンサモジュールと、
前記回転電機と前記パワーモジュールとを電気的に接続する複数相のバスバーを含む配線モジュールと、
前記回転電機、前記伝達機構、前記パワーモジュール、前記コンデンサモジュール、及び前記配線モジュールを収容するケースと、を備え、
前記ケースは、第1収容室を形成する部位と、第2収容室を形成する部位と、前記第1収容室及び第2収容室を隔てる隔壁部とを一体的に有し、
前記第1収容室は、前記回転電機と、前記伝達機構とを収容し、
前記第2収容室は、前記パワーモジュールと、前記コンデンサモジュールと、前記配線モジュールとを収容し、
前記パワーモジュール、前記コンデンサモジュール、及び前記配線モジュールは、上下方向に視て互いに重ならないそれぞれの締結位置で、前記隔壁部に直接的に締結される、車両用駆動装置が提供される。
Claims (7)
- 回転電機と、
前記回転電機と車輪との間に駆動連結される伝達機構と、
パワー半導体素子を有し、前記回転電機に複数相の交流電力を供給するパワーモジュールと、
前記パワーモジュールと電源との間に電気的に接続される平滑コンデンサを含むコンデンサモジュールと、
前記回転電機と前記パワーモジュールとを電気的に接続する複数相のバスバーを含む配線モジュールと、
前記回転電機、前記伝達機構、前記パワーモジュール、前記コンデンサモジュール、及び前記配線モジュールを収容するケースと、を備え、
前記ケースは、第1収容室を形成する部位と、第2収容室を形成する部位と、前記第1収容室及び前記第2収容室を隔てる隔壁部とを一体的に有し、
前記第1収容室は、前記回転電機と、前記伝達機構とを収容し、
前記第2収容室は、前記パワーモジュールと、前記コンデンサモジュールと、前記配線モジュールとを収容し、
前記パワーモジュール、前記コンデンサモジュール、及び前記配線モジュールは、上下方向に視て互いに重ならないそれぞれの締結位置で、前記隔壁部に直接的に締結される、車両用駆動装置。 - 前記パワーモジュールは、前記パワー半導体素子に熱的に接続される放熱部材を含み、
前記放熱部材と前記隔壁部との間に、冷却水路が形成される、請求項1に記載の車両用駆動装置。 - 前記回転電機の軸方向が車両の左右方向に対応する向きで車両に搭載可能であり、
車両搭載状態での車両前後方向の長さに関して、前記配線モジュールは、前記パワーモジュールよりも長く、前記パワーモジュールは、前記コンデンサモジュールよりも長い、請求項1に記載の車両用駆動装置。 - 前記複数相のバスバーを流れる電流を検出する電流センサを含むセンサモジュールを更に備え、
前記センサモジュールは、前記ケースの前記第2収容室に収容され、
前記回転電機の軸方向が車両の左右方向に対応する向きで車両に搭載可能であり、
車両搭載状態での車両左右方向の長さに関して、前記センサモジュールは、前記パワーモジュールよりも短く、前記パワーモジュールは、前記コンデンサモジュールよりも短い、請求項1に記載の車両用駆動装置。 - 前記配線モジュールと前記回転電機からの端子台との間の電気的な接続部を形成する第1締結部材と、前記パワーモジュールと前記配線モジュールとの間の電気的な接続部を形成する第2締結部材と、前記パワーモジュールと前記コンデンサモジュールとの間の電気的な接続部を形成する第3締結部材とは、上下方向又は締結方向に直角な方向に視て、互いに重なる、請求項1に記載の車両用駆動装置。
- 前記パワーモジュール、前記コンデンサモジュール、及び前記配線モジュールは、上下方向に直角な方向に視て、前記回転電機に重なる、請求項1に記載の車両用駆動装置。
- 前記パワーモジュール、前記コンデンサモジュール、及び前記配線モジュールは、互いの電気的な接続部とは異なる部分が、上下方向に視て、前記ケースにおける異なる領域に配置される、請求項1から6のうちのいずれか1項に記載の車両用駆動装置。
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| EP24770274.9A EP4651359A1 (en) | 2023-03-14 | 2024-02-05 | Vehicle drive device |
| JP2025506559A JPWO2024190154A1 (ja) | 2023-03-14 | 2024-02-05 | |
| CN202480017999.2A CN120858515A (zh) | 2023-03-14 | 2024-02-05 | 车辆用驱动装置 |
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| JP2023-039626 | 2023-03-14 |
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| JP (1) | JPWO2024190154A1 (ja) |
| CN (1) | CN120858515A (ja) |
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Citations (8)
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|---|---|---|---|---|
| WO2009066541A1 (ja) * | 2007-11-22 | 2009-05-28 | Mitsubishi Heavy Industries, Ltd. | インバータ一体型電動圧縮機 |
| WO2015182722A1 (ja) * | 2014-05-28 | 2015-12-03 | アイシン・エィ・ダブリュ株式会社 | 車両用駆動装置 |
| JP2017229174A (ja) * | 2016-06-23 | 2017-12-28 | 日産自動車株式会社 | 回転電機装置 |
| WO2018229929A1 (ja) * | 2017-06-15 | 2018-12-20 | 日産自動車株式会社 | 電力変換装置 |
| WO2020040278A1 (ja) * | 2018-08-24 | 2020-02-27 | 日本電産エレシス株式会社 | インバータユニット、モータユニット |
| WO2020179217A1 (ja) | 2019-03-06 | 2020-09-10 | 日本電産株式会社 | モータユニット |
| WO2021140712A1 (ja) * | 2020-01-10 | 2021-07-15 | アイシン・エィ・ダブリュ株式会社 | 車両用駆動装置 |
| JP2021129406A (ja) * | 2020-02-13 | 2021-09-02 | 株式会社デンソー | 電力変換装置 |
-
2024
- 2024-02-05 CN CN202480017999.2A patent/CN120858515A/zh active Pending
- 2024-02-05 JP JP2025506559A patent/JPWO2024190154A1/ja active Pending
- 2024-02-05 EP EP24770274.9A patent/EP4651359A1/en active Pending
- 2024-02-05 WO PCT/JP2024/003652 patent/WO2024190154A1/ja not_active Ceased
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|---|---|---|---|---|
| WO2009066541A1 (ja) * | 2007-11-22 | 2009-05-28 | Mitsubishi Heavy Industries, Ltd. | インバータ一体型電動圧縮機 |
| WO2015182722A1 (ja) * | 2014-05-28 | 2015-12-03 | アイシン・エィ・ダブリュ株式会社 | 車両用駆動装置 |
| JP2017229174A (ja) * | 2016-06-23 | 2017-12-28 | 日産自動車株式会社 | 回転電機装置 |
| WO2018229929A1 (ja) * | 2017-06-15 | 2018-12-20 | 日産自動車株式会社 | 電力変換装置 |
| WO2020040278A1 (ja) * | 2018-08-24 | 2020-02-27 | 日本電産エレシス株式会社 | インバータユニット、モータユニット |
| WO2020179217A1 (ja) | 2019-03-06 | 2020-09-10 | 日本電産株式会社 | モータユニット |
| WO2021140712A1 (ja) * | 2020-01-10 | 2021-07-15 | アイシン・エィ・ダブリュ株式会社 | 車両用駆動装置 |
| JP2021129406A (ja) * | 2020-02-13 | 2021-09-02 | 株式会社デンソー | 電力変換装置 |
Non-Patent Citations (1)
| Title |
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| See also references of EP4651359A1 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4651359A1 (en) | 2025-11-19 |
| JPWO2024190154A1 (ja) | 2024-09-19 |
| CN120858515A (zh) | 2025-10-28 |
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