JP2017034880A - Electrically-driven oil pump device - Google Patents

Abstract

An electric oil pump device capable of preventing malfunction of a substrate of a controller and damage of electronic circuit components mounted on the substrate due to water vapor entering the motor housing. A breathing hole 29 that communicates the outside and the inside of a motor housing 17 is provided in the center of the cover 20 facing the substrate 26 of the ECU 4, and a waterproof and dustproof block that closes the breathing hole 29 on the inner surface side of the cover 20. The resin filter 30 for use is fixed. In order to detect the relative humidity, a humidity sensor 34 is mounted on the rear surface of the substrate 26, detects the humidity in the motor chamber 21, and transmits data to the ECU 4. When external water vapor enters the motor housing 17 from the breathing hole 29 and the motor chamber 21 is in a high humidity state and the electric motor is stopped for a predetermined time or more, the ECU 4 rotates the electric motor. As a result, the rotation of the rotating shaft causes air to flow, and water vapor flows through the motor chamber 21, passes through the breathing hole 29, and is released to the outside. [Selection] Figure 2

Description

  The present invention relates to an electric oil pump device, and more particularly to an electric oil pump device used as a hydraulic pump that supplies hydraulic pressure to a transmission or the like of an automobile.

  2. Description of the Related Art Conventionally, a specific example of an electric oil pump device that supplies hydraulic pressure to a transmission or the like when an automobile is idling stopped includes a combination of an oil pump that circulates oil and an electric motor that drives the oil pump. The electric motor and the oil pump share a rotating shaft and are arranged side by side in the direction of the central axis of the oil pump, and the motor housing is integrally coupled to the pump housing to make it compact and lightweight. Also, this electric oil pump device has been proposed in which an electric motor is housed on the opposite side of the motor housing from the oil pump, and a motor control controller board is housed in the motor housing ( For example, see Patent Document 1). The substrate accommodated in the motor housing is covered with a cover to ensure waterproofness.

JP 2010-63224 A

  In the electric oil pump apparatus as described above, the resin members of the motor housing that houses the board on which the electronic circuit components that drive and control the electric motor are mounted and the cover that covers the opening of the motor housing are joined together by welding. ing. In the use environment of this electric oil pump device, in order to cope with a rapid temperature change due to heat generation of the electric motor, a breathing hole that penetrates the outside and the inside of the motor housing is provided in the cover. Air is circulated through this breathing hole to dissipate heat, and the inside and outside of the motor housing are held at the same pressure.

  However, when the electric oil pump device is mounted in the engine room of an automobile, water vapor in the engine room passes through a filter provided in the breathing hole and enters the motor housing, and when the outside air humidity is high, It becomes a high humidity state. For this reason, when the board of the controller housed in the motor housing is energized for a long time, insulation failure occurs due to so-called migration phenomenon in which the metal used as the wiring and electrodes moves on the insulator, and between the electrodes The insulation resistance value may be lowered and eventually short-circuited. As a result, the controller board may malfunction or the electronic circuit components on the board may fail. As a result, the electric oil pump device may stop functioning.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electric oil capable of preventing malfunction of a controller board and damage to electronic circuit components mounted on the board due to water vapor entering the motor housing. It is to provide a pump device.

  In order to solve the above-mentioned problem, the invention according to claim 1 is an electric oil pump device, wherein an oil pump, an electric motor provided adjacent to the oil pump and driving the oil pump, and the electric motor are provided. A first housing having a motor chamber for housing the electric motor, a controller provided adjacent to the electric motor, fixed in the motor chamber, and controlled to drive the electric motor, and provided adjacent to the first housing. A breathing hole that covers the first housing and communicates the motor chamber with the outside, and a second housing that has a filter that blocks the breathing hole from the inner surface, and the controller is provided on a board of the controller. The humidity in the motor chamber is detected by a humidity sensor, and the stop state of the electric motor is predetermined in a high humidity state. When it continued over between, and summarized in that rotationally drives the electric motor.

  According to the above configuration, the breathing hole that communicates the outside and the inside of the cover that covers the substrate constituting the controller is closed with the filter from the inner surface side. When the electric motor is stopped for a predetermined time or more while high humidity is detected by the humidity sensor arranged on the controller board, the electric motor is rotated. For this reason, water vapor flows and water vapor that has entered the motor chamber flows and is released to the outside through the filter, so that the internal humidity can be reduced. Thereby, it is possible to suppress the occurrence of insulation failure of the controller electrodes and the like due to migration, and to prevent malfunction of the controller board and failure of electronic circuit components mounted on the board. As a result, it is possible to prevent the function of the electric oil pump device from being stopped.

  The invention according to claim 2 is characterized in that, in the electric oil pump device according to claim 1, the humidity sensor is disposed on a surface of the substrate on the breathing hole side.

  According to the above configuration, since the humidity sensor is mounted on the surface of the substrate facing the breathing hole, it is possible to accurately detect the humidity in the motor chamber and to prevent the controller from extending in the rotation axis direction. .

  The invention according to claim 3 is the electric oil pump device according to claim 1 or 2, wherein the controller includes a temperature sensor for detecting a temperature in the motor chamber on the substrate. .

  According to the above configuration, the controller includes the temperature sensor capable of detecting the temperature in the motor chamber on the substrate, and thus can detect a high temperature state in the motor chamber. As a result, the high-temperature and high-humidity state does not last for a long time in the motor chamber, the controller board and electronic circuit components can be protected, and it is possible to prevent the function of the electric oil pump device from being stopped.

  ADVANTAGE OF THE INVENTION According to this invention, the electric oil pump apparatus which can prevent the malfunctioning of the board | substrate of a controller by the water vapor which penetrate | invaded in the motor chamber, and the damage of the electronic circuit components mounted in the board | substrate can be provided.

1 is a longitudinal sectional view showing a schematic configuration of an electric oil pump device according to an embodiment of the present invention. Schematic which shows the discharge | release path | route of the water vapor | steam in the motor chamber in FIG. The flowchart which shows the process sequence of the operation | movement which reduces the humidity in a motor chamber by a controller.

Hereinafter, an electric oil pump device (EOP: Electrical Oil Pump) according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a longitudinal sectional view showing a schematic configuration of an electric oil pump device 1 according to an embodiment of the present invention. As shown in FIG. 1, an electric oil pump device 1 is used as, for example, a hydraulic pump for an automobile transmission, and includes an oil pump (for example, an internal gear pump) 2 and an electric motor 3 that rotationally drives the oil pump 2. It is integrated inside. The electric motor 3 is a brushless motor having a three-phase winding. A controller (hereinafter referred to as ECU) 4 that controls the rotation of the electric motor 3 is also incorporated in the housing.

  The electric oil pump device 1 is provided with a mounting hole (not shown) in a transmission or an engine case (not shown) via a plurality of flange portions (not shown) protruding from an end face of a third housing (hereinafter referred to as a pump plate) 15 of the oil pump 2. It is fastened and fixed by a plurality of bolts (not shown) arranged in the circumferential direction with respect to the center of the rotation axis through the not shown.

  The oil pump 2 uses a trochoid curve type pump, which is an example of an internal gear pump here, and meshes an inner rotor 12 having external teeth on the inner peripheral side of an outer rotor 11 having internal teeth having a trochoidal tooth profile. A pump rotor 13 is configured. The outer rotor 11 is arranged eccentrically with respect to the inner rotor 12 in a fourth housing 16 (hereinafter referred to as pump housing) 16 of the oil pump 2 so as to be rotatable. The first and second housings will be described later.

  The inner rotor 12 is externally fitted and fixed to a portion closer to the pump plate 15 than a portion where the motor rotor 6 of the electric motor 3 described later is formed, and is connected to the rotating shaft 7 and is rotated by the motor rotor 6. The outer rotor 11 has one more internal tooth than the outer teeth of the inner rotor 12, and is arranged so as to be rotatable in the pump housing 16 around a position eccentric with respect to the rotation shaft 7. Further, the inner rotor 12 rotates while external teeth mesh with the inner teeth of the outer rotor 11 at a part of the entire circumference, and each external tooth substantially inscribes the inner surface of the outer rotor 11 at various locations around the entire circumference.

  Therefore, when the rotating shaft 7 is rotationally driven by the electric motor 3, the volume of the gap between the outer rotor 11 and the inner rotor 12 of the oil pump 2 repeatedly expands and contracts during one rotation of the rotating shaft 7. As a result, the suction port (suction port, not shown) provided through the pump plate 15 communicating with the gap in the rotational axis direction (hereinafter referred to as the axial direction) is changed to the discharge port (discharge port, not shown). The pumping operation is performed to send out the oil. The suction port and the discharge port are connected to an external hydraulic pipe (not shown), and hydraulic oil flows from the suction oil passage through the discharge oil passage.

  The flat pump plate 15 constituting the housing of the oil pump 2 and the pump housing 16 that houses the pump rotor 13 are made of a metal nonmagnetic material (for example, aluminum die-casting). A first housing (hereinafter referred to as a motor housing) 17 and a second housing (hereinafter referred to as a cover) 20 that house the electric motor 3 are formed of a thermoplastic resin material (for example, PA, PPS, PBT resin, etc.). . The housing of the electric oil pump device 1 includes the pump plate 15, the pump housing 16, the motor housing 17, and the cover 20. Here, the motor housing 17 and the cover 20 are formed as a waterproof housing.

In the following description, the left side of FIG. 1 is the front F and the right side is the rear R, but this is a definition for convenience in describing the present embodiment, and may be read as appropriate, such as left and right, up and down. To do.
As shown in FIG. 1, the motor housing 17 has a front end surface on the pump housing 16 side sealed with the pump housing 16 via a seal 32, and a rear end surface closed with a cover 20.

  The pump housing 16 is a thick plate-like case that expands in the radial direction with respect to the rotary shaft 7, and a pump chamber 14 that opens toward the pump plate 15 side is formed at the center thereof. An O-ring 31 is fixed to the front surface of the pump housing 16 in contact with the pump plate 15, and the opening of the pump chamber 14 is closed with the pump plate 15. An outer rotor 11 constituting the pump rotor 13 is rotatably accommodated in the pump chamber 14, and an inner rotor 12 that meshes with the outer rotor 11 is disposed inside the outer rotor 11.

  The electric motor 3 includes a rotating motor rotor 6 and a stator 5 fixed to the outside of the outer peripheral surface of the motor rotor 6. The motor rotor 6 is formed by arranging, for example, a plurality of permanent magnets 8 along the circumferential direction on the outer peripheral surface of the rotating shaft 7. The rotary shaft 7 is a metal rotary shaft 7 shared by the oil pump 2 and the electric motor 3. The rotary shaft 7 is rotatably supported by the pump housing 16 and connects the pump rotor 13 and the motor rotor 6. Driven.

  The pump housing 16 on which the rotating shaft 7 is supported is integrally formed with a cylindrical portion 22 having a smaller diameter than the pump housing 16, and the rotating shaft 7 extending from the front end of the pump rotor 13 to the rear end of the motor rotor 6 is disposed in the cylindrical portion 22. Cantilevered by bearings 23 and 24 provided at the rear. In the present embodiment, the bearings 23, 24 are ball bearings that are two rolling bearings adjacent to the front and rear, the inner rings of both the bearings 23, 24 are fixed to the rotating shaft 7, and the outer rings are fixed to the cylindrical portion 22. ing. An oil seal 25 is provided on the rotary shaft 7 to seal between the bearing 23 on the front side of the inner periphery of the cylindrical portion 22 and the pump rotor 13. Further, the front portion of the rotating shaft 7 passes through a hole formed in the pump housing 16 and enters the pump chamber 14, and the tip portion thereof is connected to the inner rotor 12.

  A motor rotor 6 constituting the electric motor 3 is fixed to the rear end of the rotating shaft 7 protruding rearward from the cylindrical portion 22. The motor rotor 6 is formed in a cylindrical shape that extends in the radial direction from the rear end of the rotating shaft 7 and surrounds the outer periphery of the cylindrical portion 22. More specifically, the motor rotor 6 includes a perforated disc portion 27 of the rotor core 10 and a rotor cylindrical portion 28 integrally formed on the outer periphery of the disc portion 27, and the inner periphery of the hole of the disc portion 27 rotates. The permanent magnet 8 is fixed to the shaft 7 and fixed to the outer periphery of the rotor cylindrical portion 28.

  In the stator 5, a plurality of inward salient poles (teeth) of the stator core 9 are arranged outside the outer peripheral surface of the motor rotor 6 through a slight air gap. A coil 19 is wound around each tooth of the stator core 9. Here, in order to insulate the coil 19 from the stator core 9, resin insulators 18 are mounted from both axial ends of the stator core 9.

  In the electric oil pump device 1 of the present embodiment, the board 26 of the ECU 4 for controlling the electric motor 3 is accommodated in the motor chamber 21 formed in the motor housing 17, and the rear end surface of the insulator 18 on the cover 20 side. Or fixed to the inner wall of the motor housing 17. The substrate 26 is based on an inverter (drive) circuit that converts a DC power source into AC and supplies a drive current to each coil 19 of the electric motor 3, and information on the rotational position of the outer rotor 11 detected by a sensor such as a Hall element. And a control circuit for controlling the inverter circuit. On both surfaces of the substrate 26, electronic circuit components 33 such as microcomputers, ICs, capacitors, coils and the like of the above-described circuit constituting the ECU 4 are mounted (in the figure, the electronic circuit components 33 attached to the front surface of the substrate 26). An example is shown).

  With the above configuration, the drive current controlled by the ECU 4 is supplied to each coil 19 of the electric motor 3. As a result, a rotating magnetic field is generated in the coil 19, torque is generated in the permanent magnet 8, and the rotor 6 is rotationally driven. Thus, when the inner rotor 12 is driven to rotate, the outer rotor 11 is driven to rotate by the inner rotor 12, and the gap between the inner teeth of the outer rotor 11 and the outer teeth of the inner rotor 12 is repeatedly expanded and contracted. Pump operation is performed to suck and discharge oil through the discharge port.

  The motor housing 17 and the cover 20 are joined by welding. For example, hot plate welding, ultrasonic welding, vibration welding, infrared welding, or the like that joins resin members by heating and pressurizing are used. Here, in the center portion of the cover 20, in order to adjust the pressure (pressure) difference between the inside and outside of the motor housing 17 due to a sudden temperature change of the electric motor 3 in the environment where the oil pump 2 is used, the outside and inside of the motor housing 17 are arranged. Is provided with a circular breathing hole 29 extending from one surface to the opposite surface in the axial direction of the oil pump 2. In addition, a filter 30 that covers the breathing hole 29 is fixed to the inner surface (front surface) of the cover 20. The filter 30 blocks water, for example, and allows air to pass therethrough. Note that the filter 30 may be a position where air can easily pass through, and the breathing hole 29 and the filter 30 may be appropriately provided in addition to the central portion. Hereinafter, the case where the breathing hole 29 and the filter 30 are in the center of the cover 20 will be described.

  Further, a humidity sensor 34 is disposed on the rear surface of the substrate 26 (the surface facing the cover 20). The humidity sensor 34 is a sensor that can be mounted on a substrate on which a humidity sensor element (for example, an electric resistance type, an electric capacitance type, etc.) that detects relative humidity (% RH) and a signal processing circuit are integrated. In the present embodiment, the humidity sensor 34 constitutes a relative humidity / temperature sensor including a temperature sensor composed of a temperature sensor element (for example, a thermistor, a resistance temperature detector, etc.) that measures temperature. The measured data is transmitted to the microcomputer of the ECU 4 as serial data, for example, and the humidity or temperature is detected.

  Next, FIG. 2 is a schematic diagram showing a water vapor discharge path in the motor chamber 21 in FIG. In the following description, the lower side of FIG. 2 is the front F and the upper side is the rear R, but this is a definition for convenience in explaining the present embodiment, and may be read as appropriate up and down, left and right, etc. And

  As shown in FIG. 2, a pressure difference between the inside and outside of the motor housing 17 is adjusted at the center of the cover 20 facing the substrate 26 due to a rapid temperature change of the electric motor 3 (see FIG. 1) in the use environment after welding. In order to do this, a breathing hole 29 that communicates the outside and the inside of the motor housing 17 is provided. For example, in the present embodiment, the breathing hole 29 has a stepped circular through-hole formed by a small-diameter portion on the rear side that is the outside air side of the cover 20 and a large-diameter portion on the front side that is the substrate 26 or the motor rotor 6 side of the cover 20. A hole is formed.

  Further, since the board 26 on which the electronic circuit component 33 is mounted is accommodated while keeping the airtightness of the motor chamber 21 in the motor housing 17, the front side of the cover 20 is made of a waterproof / dustproof resin that closes the breathing hole 29. A filter 30 (for example, a waterproof and moisture-permeable material) is fixed. As the filter 30, for example, a vent filter or the like provided with a gas permeable membrane that blocks liquid (for example, water) and allows gas (for example, air or water vapor) to pass therethrough is used. Thereby, even if the air flows through the breathing hole 29 and the filter 30 and the temperature of the electric motor 3 (see FIG. 1) rapidly changes, the inside and outside of the motor housing 17 are kept at the same pressure. Therefore, when the outside (engine room or the like) is in a high temperature and high humidity state (for example, 85 ° C., 85% RH), the temperature and Humidity rises gradually.

  Furthermore, in the present embodiment, a humidity sensor 34 is mounted on the rear surface of the substrate 26 (the surface facing the cover 20) in order to detect relative humidity. The humidity sensor 34 detects the humidity in the motor chamber 21 and transmits data to the ECU 4. When external water vapor enters the motor housing 17 from the breathing hole 29, the inside of the motor chamber 21 is in a high humidity state, and the electric motor 3 is stopped for a predetermined time or longer, the ECU 4 causes the rotating shaft 7 ( 1) is rotated. Thereby, since the rotation of the rotary shaft 7 causes air to flow, water vapor flows in the motor housing 17 (motor chamber 21) or through a plurality of holes penetrating a part of the substrate 26 and the like through the breathing hole 29. It passes through and is discharged to the outside (indicated by a broken arrow in the figure). Further, the water vapor is attached to the stator core 9 (see FIG. 1), passes through the gaps between the plurality of insulators 18 (see FIG. 1) adjacent to each other in the axial direction on both sides in the axial direction, and is released to the outside from the breathing hole 29. Is done. If necessary, a vent hole (not shown) may be provided in the stator core 9 so that water vapor passes through the space between the insulator 18 and the motor housing 17. As a result, the amount of water vapor around the substrate 26 can be reduced and kept at a lower humidity than the outside.

  Next, FIG. 3 is a flowchart showing a processing procedure of an operation of reducing the humidity in the motor chamber 21 by the ECU 4. The control blocks (steps S301 to S307) shown below are realized by a program executed by the CPU (microcomputer, not shown) of the ECU 4, and the electric oil is obtained by repeatedly executing each arithmetic processing at predetermined intervals. The actuator of the pump device 1 is driven and controlled.

  First, the CPU determines whether or not the electric oil pump device (EOP) 1 is operating (step S301). When the electric oil pump device 1 is operating, that is, when the oil pump 2 is being driven (step S301: YES), the process is terminated and the flow is exited. When the electric oil pump device 1 is not in operation (step S301: NO), the CPU acquires relative humidity data output from the humidity sensor 34 (step S302).

  Next, it is determined whether or not the humidity is greater than a predetermined value (step S303). If the humidity is equal to or lower than the predetermined value (step S303: NO), the rotation of the electric motor 3 is stopped (step S307), the process is terminated, and the flow is exited. If the humidity is higher than the predetermined value (step S303: YES), it is subsequently determined whether or not the electric motor 3 is rotating (step S304). If the electric motor 3 is rotating (step S304: YES), the process is terminated and the flow is exited. When the electric motor 3 is stopped (step S304: NO), it is subsequently determined whether or not the electric motor 3 has been stopped for a predetermined time (step S305). If the predetermined time has not elapsed (step S304: NO), the process is terminated and the flow is exited. When the predetermined time has elapsed (step S304: YES), the electric motor 3 is rotated at a predetermined rotation speed (step S306). Thereafter, the process is terminated and the flow is exited.

  Next, the operation and effect of the electric oil pump device 1 according to the present embodiment configured as described above will be described.

  According to the above configuration, the breathing hole 29 that communicates between the outside and the inside of the cover 20 that covers the substrate 26 that constitutes the ECU 4 is formed with a stepped circular through hole, and is closed by the filter 30 from the front (inner surface) side. It is. The electric motor 3 is rotated when the electric motor 3 is stopped for a predetermined time or more in a state where high humidity is detected by the humidity sensor 34 disposed on the rear surface of the substrate 26 (the surface facing the cover 20). For this reason, the water vapor flows and the water vapor that has entered the motor housing 17 flows and is released to the outside through the filter 30, thereby reducing the internal humidity. Further, since the humidity sensor 34 is mounted on the rear surface of the substrate 26 facing the breathing hole 29 in the axial direction, the humidity in the control chamber 21 is accurately detected and the ECU 4 is prevented from extending in the axial direction. be able to. Furthermore, since the ECU 4 includes a temperature sensor capable of detecting the temperature in the motor chamber 21, it can detect a high temperature state in the motor chamber 21 in particular, and prevent the high temperature and high humidity state from continuing for a long time. can do.

  As a result, even if the inside of the motor chamber 21 is in a high humidity state, the occurrence of insulation failure such as the electrodes of the ECU 4 due to migration is suppressed, and the malfunction of the board 26 of the ECU 4 or the failure of the electronic circuit component 33 mounted on the board 26 is prevented. Can be prevented. As a result, the function stop of the electric oil pump device 1 can be prevented. Further, the substrate 26 and the electronic circuit component 33 of the ECU 4 can be protected even in a high temperature and high humidity state.

  As described above, according to the present embodiment, it is possible to provide an electric oil pump device that can prevent malfunction of the ECU board and damage to electronic circuit components mounted on the board due to water vapor entering the motor housing.

  Although one embodiment according to the present invention has been described above, the present invention can also be implemented in other forms.

  In the above-described embodiment, the case where a high humidity state is detected using the modularized humidity sensor 34 has been described. However, the present invention is not limited to this, and a separate drive circuit may be provided by using the humidity sensor element alone. You may comprise. Moreover, although the case where the temperature sensor was integrated with the humidity sensor 34 was shown, not only this but the temperature sensor which consists of a temperature sensor element may be separately mounted in the board | substrate 26, and you may make it detect a temperature. In this case, the relative humidity can be accurately detected by correcting the temperature.

  In the said embodiment, although the case where it welds by heating was shown as a joining method of the resin members of the motor housing 17 and the cover 20, it is not limited to this, It depends on other welding methods or an adhesive agent Adhesion may also be used. For example, the cover 20 may be brought into contact with the fixed motor housing 17 while being rotated, and the two may be joined by spin welding in which both are welded by frictional heat generated by rotation.

  In the above embodiment, the filter 30 is fixed so as to protrude and stick to the inner surface side of the cover 20, but is not limited to this, and the outer diameter is further increased to the inner surface side of the cover 20 of the large diameter portion of the breathing hole 29. The filter 30 may be embedded and pasted with a large step.

  Although the case where an internal gear type pump is used as the oil pump 2 has been described in the above embodiment, the present invention is not limited to this, and a rotary pump using a vane drive, an external gear, or the like may be used. Further, the inscribed gear pump is not necessarily limited to the trochoid curve type pump as described above.

  In the above embodiment, the case where a plurality of permanent magnets 8 are arranged and fixed on the outer peripheral portion of the rotating shaft 7 as the motor rotor 6 of the electric motor 3 has been described. You may make it use what fixed the magnet.

1: electric oil pump device, 2: oil pump, 3: electric motor,
4: ECU (controller), 5: stator, 6: motor rotor, 7: rotating shaft,
8: permanent magnet, 9: stator core, 10: rotor core, 11: outer rotor,
12: Inner rotor, 13: Pump rotor, 14: Pump chamber,
15: Pump plate (third housing),
16: Pump housing (fourth housing)
17: Motor housing (first housing), 18: Insulator, 19: Coil,
20: Cover (second housing), 21: Motor chamber, 22: Cylindrical part,
23, 24: bearing, 25: oil seal, 26: substrate, 27: disc part,
28: Rotor cylindrical part, 29: Breathing hole, 30: Filter, 31: O-ring, 32: Seal, 33: Electronic circuit component, 34: Humidity sensor

Claims (3)

An oil pump,
An electric motor provided adjacent to the oil pump and driving the oil pump;
A first housing having a motor chamber for housing the electric motor;
A controller that is provided adjacent to the electric motor, is fixed in the motor chamber, and drives and controls the electric motor;
A second housing that is provided adjacent to the first housing, covers the first housing, communicates the motor chamber with the outside, and has a filter that closes the breathing hole from the inner surface;
The controller detects humidity in the motor chamber by a humidity sensor provided on a board of the controller, and rotates the electric motor when the electric motor is stopped for a predetermined time or more in a high humidity state. Electric oil pump device characterized by The electric oil pump device according to claim 1,
The electric oil pump device, wherein the humidity sensor is disposed on a surface of the substrate on the breathing hole side. In the electric oil pump device according to claim 1 or 2,
The electric oil pump device, wherein the controller includes a temperature sensor for detecting a temperature in the motor chamber on the substrate.

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