JP2001349228A - Starter combined generator - Google Patents

Abstract

(57) [Problem] To mount a rotor angle sensor and a pulser sensor of a brushless rotary electric machine in a compact space and improve the angle detection accuracy. A stator / generator 1 includes a stator 50 disposed around a crankshaft 201 and an outer rotor 60 fixed to the crankshaft 201 and having a magnet 62 facing the outer periphery of the stator 50.
A crank angle sensor 29 and a pulsar sensor 30 that are integrally housed in a sensor case 28 are provided on the inner periphery of the stator 50. The magnet ring 33 is fitted on the outer periphery of the hub 60a of the rotor 60. Since the crank angle sensor 29 and the pulsar sensor 30 are integrally disposed, the size is reduced. The sensor is attached to the stator 50 to improve the positional accuracy between the rotor angle sensor and the stator. The position detection accuracy is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starter / generator, and more particularly, to a starter / generator having a rotor angle sensor for controlling a timing of energizing a starter comprising a brushless motor and a pulser sensor for ignition trigger of an engine.

[0002]

2. Description of the Related Art An engine is provided with a pulser sensor, that is, a pulse pickup device, for ignition trigger.
JP-A-7-103119 discloses an engine in which a pickup sensor for detecting a passage period of a pickup magnet provided on an outer peripheral surface of a flywheel rotating integrally with a crankshaft is provided on an inner peripheral surface of a flywheel cover. Have been.

On the other hand, in a starter / generator comprising a magnet rotor fixed to a crankshaft and a stator, if this rotary machine is intended to be of a brushless type, a rotor angle sensor for controlling an energization timing is provided separately from a pulser sensor for an ignition trigger. Required. in this way,
When a rotor angle sensor and a pulser sensor are provided, it is difficult to secure an installation space for these sensors and the reluctor. In addition, it takes time to process the reluctor on the flywheel of the crankshaft and to attach a separate reluctor plate.

In view of the above situation, it is conceivable that the rotor angle sensor is attached to the crankcase to avoid machining the flywheel. FIG.
Is a sectional view of a starter / generator in which a rotor angle sensor is attached to a crankcase, and FIG. 20 is a front view of the starter / generator, particularly a stator portion.
In both figures, the crankshaft 201 is supported on the crankcase 202 by a bearing 209 and the other bearing (not shown). A cup-shaped outer rotor 60 having a magnet 62 disposed on an inner peripheral surface is fixed to an end of a crankshaft 201 protruding from the crankcase 202 to the outside.

The stator 50, which is arranged concentrically with the crankshaft 201, is attached to the partition wall 202 a attached to the crankcase 202 with three bolts 279.
A rotor angle sensor 29 is disposed between the partition wall 202a and the stator 50, and is attached to the partition wall 202a with the screw 100. An annular rotor angle sensor magnet 33a is provided on the hub 60a of the outer rotor 60.
The magnet 33a and the sensing part of the rotor angle sensor 29 face each other.

Reactors 60 are provided on the outer periphery of the outer rotor 60.
b is formed, and the reactor 60 b is connected to the outer rotor 60.
A pulsar sensor 30A is provided for detecting a timing signal and outputting a timing signal for each rotation.

[0007]

In the above-described starter / generator, it is not easy to increase the accuracy of the relative positional relationship between the rotor angle sensor 29 and the stator 50. Therefore, it is necessary to increase the accuracy of detecting the angular position of the rotor with respect to the stator. Was difficult. Further, since the rotor angle sensor is directly attached to a crankcase having a relatively high temperature, high heat resistance is required for the sensor case, the sensor element, and the like.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, improve the detection accuracy, and provide a pulsar sensor, a rotor angle sensor and a magnet corresponding to these sensors in a small space. To provide a generator.

[0009]

To achieve the above object, the present invention provides a starter / generator having a brushless rotary electric machine provided on a crankshaft, comprising a rotor angle sensor for detecting a rotation angle of the rotary electric machine. A first feature is that the rotor angle sensor is attached to a stator of the rotating electric machine.

[0010] According to the first feature, since the rotor angle sensor is attached to the stator, the relative positions of the two can be accurately adjusted to the predetermined relationship. Therefore, the accuracy of detecting the angular position of the rotor with respect to the stator can be improved.

Further, according to the present invention, the rotor angle sensor is disposed on the engine side of the stator.
A second feature is that the stator is attached by fastening means engaging from the opposite side of the engine.

According to the second feature, since the angle can be detected at a position far from the engine side, that is, far from the crankshaft end and where the runout is small, the detection accuracy can be improved, and the rotor angle sensor is mounted from outside by the fastening means. Therefore, assembling workability can be improved, and the status space can be effectively used.

The present invention also provides a brushless starter / generator having a rotor connected to a crankshaft and a stator, which is housed in a common sensor case on the stator and arranged close to each other. A third feature is that a pulser sensor and a rotor angle sensor for an ignition trigger are provided.

According to the third feature, since the pulsar sensor and the rotor angle sensor are housed in the sensor case and arranged integrally, the space can be effectively used, and the reluctor provided corresponding to the sensor can be integrally formed.

Also, the present invention has a fourth feature in that the pulsar sensor is disposed closer to the engine and the rotor angle sensor is disposed closer to the end of the crankshaft in the crankshaft direction. A fifth feature is that the sensors are arranged at equal intervals in the crankshaft rotation direction.

Further, according to the present invention, the rotor angle sensor includes a plurality of elements arranged in a row in the crankshaft rotation direction, and the pulsar sensor includes the plurality of elements. There is a sixth feature in that it is located within the directional width.

According to the fourth feature, the influence of the runout of the crankshaft on the engine ignition control can be reduced, and according to the fifth feature, the manufacture is facilitated. According to the sixth feature, the size of the sensor in the crankshaft rotation direction can be reduced.

Still further, according to the present invention, the rotor has a substantially cylindrical rotor yoke having an inner peripheral surface along the outer periphery of the stator, and a plurality of magnet insertion holes are arranged in a circumferential direction of the rotor yoke. The seventh feature is that a permanent gap is inserted into the magnet insertion hole with a partial gap provided between the rotor yokes.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a side perspective view showing a main body structure of a scooter type motorcycle equipped with a starter / generator according to one embodiment of the present invention. In the figure, a vehicle body front portion 3a and a vehicle body rear portion 3b are connected via a low floor portion 4, and a vehicle body frame forming a skeleton of the vehicle body comprises a down tube 6 and a main pipe 7 as main parts. A seat 8 is disposed above a fuel tank and a storage box (both not shown) supported by the main pipe 7.

An upwardly extending handle 11 and a downwardly extending front fork 12 are rotatably supported on the steering head 5 of the vehicle body front portion 3a, and a front wheel FW is pivotally supported on the lower end of the front fork 12. Is done. The upper part of the handle 11 is covered with a handle cover 13 including an instrument panel. A bracket 15 is provided at the lower end of the rising portion of the main pipe 7, and a hanger bracket 18 of the swing unit 2 is swingably connected to and supported by the bracket 15 via a link member 16.

At the front of the swing unit 2, a single-cylinder, four-stroke internal combustion engine E is mounted. This internal combustion engine E
A belt-type continuously variable transmission 26 is provided from the rear to the rear. A speed reducer 27 is provided at the rear of the transmission 26 via a centrifugal clutch, and a rear wheel RW is supported by the speed reducer 27. A rear cushion 22 is interposed between the upper end of the speed reducer 27 and the upper bent portion of the main pipe 7. Internal combustion engine E
A carburetor 24 is connected to an intake pipe 23 extending from the carburetor, and an air cleaner 25 is connected to the carburetor 24.

FIG. 3 is a sectional view of the swing unit 2 taken along the center axis of the crankshaft. The swing unit 2 is configured by combining a left crankcase 202L and a right crankcase 202R.
02. The crankshaft 201 is rotatably supported by bearings 208 and 209 fixed to the crankcase 202R. A connecting rod 213a is connected to the crankshaft 201 via a crankpin 213.

The left crankcase 202L also functions as a case of a belt-type continuously variable transmission chamber, and
A belt drive pulley 210 is rotatably provided on the crankshaft 201 extending to 2L. Belt drive pulley 21
0 is a fixed pulley half 210L and a movable pulley half 2
10R, the fixed pulley half 210L is fixed to the left end of the crankshaft 201 via the boss 211, and the movable pulley half 210R is mounted on the right side of the crankshaft 201R.
And can approach / separate from the fixed pulley half 210L. Both pulley halves 210L, 2
The V belt 212 is wound around 10R.

On the right side of the movable pulley half 210R, a cam plate 215 is fixed to the crankshaft 201, and a slide piece 215a provided on the outer peripheral end is formed in the axial direction at the outer peripheral end of the movable pulley half 210R. It is slidably engaged with the cam plate sliding boss 210Ra. The cam plate 215 of the movable-side pulley half 210R has a tapered surface whose outer side is inclined toward the cam plate 215, and a dry weight ball 216 is accommodated in a space between the tapered surface and the movable pulley half 210R. Is done.

When the rotation speed of the crankshaft 201 increases, a dry weight ball 216 that rotates between the movable pulley half 210R and the cam plate 215 rotates together.
The movable pulley half 21 moves in the centrifugal direction by centrifugal force.
OR is pressed by the dry weight ball 216 and moves leftward to approach the fixed pulley half 210L. As a result, the V-belt 212 sandwiched between the two pulley halves 210L and 210R moves in the centrifugal direction, and its winding diameter increases.

At the rear of the vehicle, the belt drive pulley 21
A driven pulley (not shown) corresponding to 0 is provided, and the V-belt 212 is wound around the driven pulley. By this belt transmission mechanism, the power of the internal combustion engine E is automatically adjusted and transmitted to the centrifugal clutch, and drives the rear wheel RW via the speed reducer 27 and the like.

A starter / generator 1 combining a starter motor and an AC generator is provided in the right crankcase 202R. The starter / generator 1 includes a stator 50 and an outer rotor 60 that rotates around the outer periphery of the stator 50. The outer rotor 60 has a cup-shaped rotor case 63 connected to the crankshaft 201, and a magnet 62 housed on the inner peripheral surface of the rotor case 63. The magnet 62 is constituted by N-pole and S-pole permanent magnets which are alternately inserted in the circumferential direction of the rotor yoke described later.

The outer rotor 60 is attached to the tapered end of the crankshaft 201 and is fixed by bolts 253. The stator 50 disposed on the inner peripheral side of the outer rotor 60 is fixed to the crankcase 202 with bolts 279. The outer rotor 60 has a central conical portion 280
The fan 28 whose skirt portion is fixed by bolts 246
0 is provided. Radiator 2 adjacent to fan 280
82 are provided, and the radiator 282
Covered by 1.

Starter / generator 1 and bearing 209
On the crankshaft 201 between the sprocket 231
Is fixed, and the sprocket 231 has the crankshaft 2
From 01, a chain for driving a camshaft (not shown) is wound. Sprocket 231 is formed integrally with gear 232 for transmitting power to a pump that circulates lubricating oil.

FIG. 11 is a side view of a main part of the rotor yoke of the outer rotor 60. The rotor yoke 61 is formed by stacking ring-shaped silicon steel plates (thin plates) in a substantially cylindrical shape, and has a plurality of openings 6 provided in the circumferential direction of the rotor yoke 61.
11 are provided. In the plurality of openings 611, N
The pole and south pole permanent magnets are alternately arranged and inserted axially. Twelve openings 611 are formed in the circumferential direction of the rotor yoke 61 at intervals of 30 degrees. Each adjacent opening 6
The portion between 11 functions as the supplementary pole portion 613.

The permanent magnet 6 inserted into each opening 611
The cross-sectional shape of No. 2 is substantially drum-shaped with a thick central portion. The shape of the opening 611 is not the same as the cross-sectional shape of the permanent magnet 62. When the permanent magnet 62 is inserted into the opening 611, the first gap 612 is formed on both sides along the circumferential direction of each permanent magnet 62. Are formed, and a second gap 614 is formed on both ends of each permanent magnet 62 on the stator side.

The permanent magnet 62 is not brought into contact with the inner wall surface of the insertion hole (opening) 611 over the entire surface, but at two points on the inner peripheral side, that is, both ends on the stator side, and one on the outer peripheral center.
A total of three points can be abutted and supported. The gap other than the contact point can be filled with an adhesive for fixing the permanent magnet 62.

According to the above-mentioned three-point support, while the permanent magnet 62 can be mechanically held in the opening 611 of the rotor yoke 61, a space necessary for filling the adhesive between them can be secured. It is possible to improve workability in the assembling process and firmly fix the permanent magnet. Further, by supporting the permanent magnet 62 at three points in the opening 611 of the rotor yoke 61, the gap filled with the adhesive can be maximized while preventing the displacement of the permanent magnet 62 in the opening 611. Thus, extremely strong fixing with an adhesive becomes possible.

FIG. 12 is a block diagram of a control system of the starter / generator 1, and the same reference numerals as those in the above-described drawings denote the same or equivalent parts. The control unit 40
DC-DC converter 102 which converts output voltage VBATT of battery 42 to logic voltage VDD and supplies it to CPU 101
An ignition control device 103 that controls power supply to an IG (ignition) coil 41 to ignite the ignition plug 43 at a predetermined timing; and converts a battery voltage VBATT into three-phase AC power to convert the stator winding of the starter / generator 1 into a three-phase AC power. And a three-phase driver 104 that supplies line 53.

The throttle sensor 45 detects the throttle opening θth and notifies the CPU 101 of the detection. The rotor angle sensor 29 detects the rotational position of the outer rotor 60 and
Notify the PU 101. The regulator 44 controls the induced electromotive force generated in the stator winding 53 according to the rotation of the outer rotor 60 to a predetermined battery voltage VBATT and supplies the power to the power supply line L.

In this configuration, when the engine is started, C
The PU 101 detects the stator winding 53 based on the rotational position of the outer rotor 60 detected by the rotor angle sensor 29.
And the switching timing of each power FET of the three-phase driver 104 is controlled to supply AC power to each phase of the stator winding 53. Each power FET (Tr1 to Tr6) of the three-phase driver 104 is a CPU1
01, and the duty ratio, that is, the driving torque, is controlled based on the throttle opening θth detected by the throttle sensor 45.

On the other hand, when the engine (internal combustion engine) E is started, power supply from the three-phase driver 104 to the stator winding 53 is stopped, and the starter / generator 1 is driven by the internal combustion engine E this time. . At this time, an electromotive force is generated in the stator winding 53 according to the rotation speed of the crankshaft 201. This electromotive force is controlled to the battery voltage VBATT by the regulator 44, and then supplied to the electric load and the surplus power is charged to the battery 42.

Next, the operation of the gaps 612 and 614 provided in the rotor yoke 61 will be described. FIG. 13 is a diagram showing a magnetic flux density distribution when the starter / generator 1 functions as a starter motor, and FIG. 14 is a diagram showing a magnetic flux density distribution when the starter / generator 1 functions as a generator. It is.

When the starter / generator 1 functions as a starter motor, when an exciting current is supplied from the battery 42 to the respective stator windings 53 via the control unit 40, as shown in FIG. The lines of magnetic force generated in the radial direction from the stator salient poles 52N pass through the stator-side surface of the S-pole permanent magnet 62S to the rear surface, and most of the core lines 615 and the auxiliary poles 6 of the rotor yoke 61.
13, the stator salient pole 52S excited to the adjacent S pole and the stator salient pole 52N excited to the N pole via the stator core 51.

Here, the first air gaps 612 formed on both sides along the circumferential direction of each of the permanent magnets 62 reduce the magnetic flux leakage from the side of each of the permanent magnets 62 to the auxiliary pole portion 613. Most of the lines of magnetic force pass from each permanent magnet 62 to the core 615 of the rotor yoke 61,
To the stator 50 side. As a result, the vertical component of the magnetic flux passing through the air gap between the outer rotor 60 and the stator 50 increases, so that the driving torque increases as compared with the case where the air gap 612 is not provided. Furthermore, since the air gap 614 for limiting the magnetic path in the circumferential direction is also formed on the stator side at both ends of the permanent magnet 62,
The leakage magnetic flux passing inside the rotor yoke 61 also decreases.

That is, one of the two air gaps 614 formed on both sides of the permanent magnet acts to efficiently guide the magnetic flux from the auxiliary pole portion 613 of the rotor yoke 61 to the stator salient pole 52S, and the other of the air gaps 614. Acts to efficiently guide the magnetic flux passing through the inner circumferential portion of the rotor yoke 61 from the permanent magnet 62N to the stator salient pole 52S. As a result, the vertical component of the magnetic flux passing through the air gap between the outer rotor 60 and the stator 50 further increases, and the driving torque as a starter motor can be further increased.

On the other hand, when the starter / generator 1 functions as a generator, as shown in FIG. 14, the magnetic flux generated from each permanent magnet 62 forms a closed magnetic path together with the salient stator poles and the stator core. Generated current corresponding to the number can be generated in the stator winding.

As described above, the portion 613a where the magnetic flux flows in from the back of the permanent magnet and the portion 613b near the gap 614,
Since the flow of the magnetic force at 613c is very important for increasing the torque at the time of starting and reducing the friction at the time of operation as a generator, the portions 613a, 613b and 6
By positioning the rotor yoke 61 and the permanent magnet 62 so as to abut with high accuracy in 13c, it is possible to secure a designed magnetic force.

Next, a rotor angle sensor and a pulser sensor (hereinafter, both are referred to as a "rotation detection sensor")
Will be described. FIG. 18 is a connection diagram of each sensor. The terminals of the three-phase stator winding 53 are
It is connected to the terminal block 40a of the control unit 40 for connection with the phase driver 104. The rotor angle sensor 29 provided on the stator 50 is configured as a set of three. Further, the pulsar sensor 30 may be arranged close to the rotor angle sensor 29, as described later, or may be arranged on the outer periphery of the outer rotor 60. Each of the rotor angle sensor 29 and the pulser sensor 30 can be constituted by a Hall IC or a magnetoresistive (MR) element. The lead wire of each sensor is connected to the substrate 31.

FIG. 1 is a cross-sectional view of a starter / generator 1 showing a layout of a rotation detection sensor, and FIG. 4 is a view showing a layout of the rotation detection sensor as viewed from the continuously variable transmission. A sensor case 28 is fitted on the inner periphery of the annular stator 50, and a rotor angle sensor 29 and a pulser sensor 30 are provided in the sensor case 28 at equal intervals along the outer periphery of the boss of the outer rotor 60.
The rotor angle sensor 29 is for controlling the timing of energizing the stator coil of the brushless starter / generator 1, and the pulser sensor 30 is for controlling the ignition of the engine.

The rotor angle sensor 29 and the pulsar sensor 30 are shifted from each other in the axial direction of the crankshaft 201, the rotor angle sensor 29 is located near the end of the crankshaft 201, that is, on the side of the fan 280, and the pulsar sensor 30 is connected to the crankshaft 201. It is located near the center of the engine, that is, near the center of the engine. By arranging the pulsar sensor 30 near the center of the crankshaft 201, the influence of the runout of the crankshaft 201 on the detection accuracy is reduced, and the accuracy of engine ignition control is improved. The lead wires of the rotation detection sensors 29 and 30 are connected to a board 31, and a wire harness 32 is connected to the board 31.

A magnet ring 33 that exerts a magnetic effect on the rotor angle sensor 29 and the pulser sensor 30 is fitted around the outer periphery of the hub 60a of the outer rotor 60.
The magnet ring 33 is magnetized in two stages so as to correspond to the rotor angle sensor 29 and the pulser sensor 30, respectively. On one side 33a of the magnet ring 33 corresponding to the rotor angle sensor 29, magnetic poles of N pole and S pole are alternately formed by 30 ° in the circumferential direction (see FIG. 5). Also, the other 33 of the magnet ring 33 corresponding to the pulsar sensor 30
b, the pulsar sensor 3 for each rotation of the crankshaft 201
In order to output one pulse of 0, 15 in one place in the circumferential direction.
Magnetic poles are formed in the angle range of ° to 40 ° (see FIG. 6).

The magnet ring 33 is preferably a plastic magnet ring. Also, instead of the magnet ring 33b corresponding to the pulsar sensor 30, FIG.
As described above, the magnet 33d may be fixed to the plastic ring portion 33c.

As shown in FIG. 4, the rotor angle sensor 29
The pulsar sensor 30 and the pulsar sensor 30 may be arranged so as not to overlap each other when viewed from the crankshaft 201 direction. However, to make the sensor case 28 compact, the arrangement is not necessarily limited to this arrangement. FIG. 8 is a perspective view of a main part of the sensor unit showing an example in which the size of the sensor case 28 in the rotation direction of the crankshaft 201 is reduced. In the figure, the pulsar sensor 30 is arranged between three rotor angle sensors 29 arranged in the rotation direction of the crankshaft 201, and particularly arranged in the axial direction with the middle sensor of the three rotor angle sensors 29. According to this arrangement, the size of the sensor case 28 in the rotation direction of the crankshaft 201 may be set in consideration of the accommodation space for three Hall ICs. Good mass concentration and good weight balance. The substrate 31 to which the lead wires of the sensors 29 and 30 are connected is a flat plate, and its longitudinal end face is set in an arc shape along the inner wall of the saddle-shaped sensor case 28 as shown in the figure. Good.

FIG. 9 is a perspective view of a sensor section according to a modification. In this modification, unlike FIG. 8, the substrate 31 is provided not above the rotation detection sensors 29 and 30, that is, near the outer periphery of the stator 50, and is not a flat plate so that the distance from the sensors 29 and 30 is equal. It is good to form in an arc shape. For example, if a flexible vinyl substrate is used, an arc can be easily formed. By equalizing the distance between the sensors 29 and 30 and the substrate 31 in this manner, the lengths and shapes of the terminals of the sensors 29 and 30 are uniform, so that the connection with the substrate 31 is easy and the sensor case 28
Good mass concentration and good weight balance within.

In order to attach the sensor case 28 to the stator 50, for example, a bracket 28a is extended from the sensor case 28 (see FIG. 4).
a may be screwed to the stator 50. Further, the sensor case 28 may be screwed from the fan 280 side.
FIG. 10 is a cross-sectional view showing an example of mounting the sensor case 28, and the same reference numerals as those in FIG. 4 indicate the same or equivalent parts. In the figure, an insert nut 34 is provided in the sensor case 28.
Is embedded. The installation position of the insert nut 34 is indicated by reference numeral 34a in FIG. A plate 35 on which an insulator 50a is engaged with an end surface is applied to the surface of the stator 50 on the fan 280 side.
The sensor case 28 is fixed to the stator 50 by screwing the bolt 36 into the insert nut 34 with the. According to this, the sensor case 28 is connected to the stator 50
Since the size of the stator can be reduced in the radial direction, a space for the stator can be secured, and the number of coil windings can be increased.

Next, a second embodiment of the present invention will be described.
FIG. 15 is a cross-sectional view of a starter / generator according to the second embodiment, and FIG. 16 is a view of a stator portion viewed from the center of the engine. The same reference numerals as in FIG. In both figures, a cup-shaped outer rotor 60 having a hub 60a is fixed to a tapered portion at the end of the crankshaft 201. While the position of the hub 60a in the rotation direction with respect to the crankshaft 201 is regulated by the key 70, the movement of the crankshaft 201 in the axial direction is restricted by the nut 71 screwed to the bolt portion at the end of the crankshaft 201. I have.

A rotor yoke including a magnet 62 is provided on the inner periphery of the cup-shaped portion of the outer rotor 60, similarly to the rotor yoke shown in FIG. 1, and a space between the rotor yoke and the hub 60a is concentric with the outer rotor 60. Is arranged. The stator 50 is provided on the outside, that is, the crankshaft 201.
It is attached to the partition wall 202a of the crankcase 202 with three bolts 279 inserted from the end side.

Between the stator 50 and the partition wall 202a,
A sensor case 72 accommodating the rotor angle sensor 29 is arranged, and the sensor case 72 is fixed to the stator 50 by bolts 73 as fastening means inserted through the stator 50 in the same direction as the bolts 279. That is, the sensor case 72 is attached by effectively utilizing the space between the bolts 279.

The hub 60a of the outer rotor 60 is provided with an annular rotor angle sensor magnet 33a. The magnet 33a and the sensing part of the rotor angle sensor 29 are positioned so as to face each other.

The outer periphery of the outer rotor 60 has a reluctor 60
b is formed, and the reactor 60 b is connected to the outer rotor 60.
A pulsar sensor 30A is provided for detecting a timing signal and outputting a timing signal for each rotation.

The lead wires of the sensors 29 and 30A,
The lead portion of the stator winding is composed of the stator 50 and the partition wall 2.
02a, and are bound by a cable clip 74, and the cable clip 74 is
Fixed to 0.

Next, the rotor angle sensor will be described in more detail. FIG. 17 is a sectional view of a main part of the stator. In the figure, an insert nut 76 is embedded in a sensor case 72 made of an electrically insulating material. The sensor case 72 is fixed to the side surface of the stator 50 by screwing a bolt 73 penetrating through the stator 50 into an insert nut 76. A Hall element as the rotor angle sensor 29 is embedded near the inner periphery of the stator 50 of the sensor case 72, and the lead wire of the Hall element is connected to the substrate 31A. As described above, the rotor angle sensor 29
The sensor leads are assembled on a substrate 31A, and the control unit 40 is covered with a coating code 78.
Drawn to. On both sides of the stator 50, insulating plates 77 are provided.
The winding 53 is wound around the stator 50 via the insulating plate 77.

In the second embodiment, the pulsar sensor 30
A is disposed around the outer rotor 60 and the
Was detected. However, the first embodiment (FIG. 1)
Similarly to the above, the rotor angle sensor 29 and the pulsar sensor 30A may be arranged adjacent to each other to detect the magnet 33 arranged on the outer periphery of the hub 60a of the outer rotor 60.
In short, the rotor angle sensor 29 and the pulsar sensor 30A
Among them, at least the rotor angle sensor 29 is
It only needs to be attached to 0.

[0060]

As is apparent from the above description, according to the first and second aspects of the present invention, since the rotor angle sensor is attached to the stator, the positional accuracy between the rotor angle sensor and the stator is improved, and the stator is improved. , The accuracy of detecting the angular position of the rotor with respect to. Further, according to the invention of claim 2, it is possible to improve the workability when attaching the rotor angle sensor to the stator.

Further, according to the second to seventh aspects of the present invention, the pulsar sensor and the rotor angle sensor are housed in the sensor case and arranged integrally, so that the space can be effectively used and provided corresponding to the sensor. The reactor can also be configured integrally. In particular, according to the invention of claim 4, since the influence of the runout of the crankshaft on the engine ignition control can be reduced, the accuracy of the ignition timing can be improved, and according to the invention of claim 5, Manufacturing is facilitated. Further, according to the invention of claim 6, the size of the sensor in the crankshaft rotation direction can be reduced.

According to the seventh aspect of the present invention, in order to increase the torque at the time of starting as a starter and to reduce the friction at the time of operation as a generator, the magnet can be easily formed without affecting the magnetic force in design. And it can be fixed firmly.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a starter / generator according to an embodiment of the present invention.

FIG. 2 is a side perspective view of a scooter type motorcycle equipped with a starter / generator according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a main part of an engine including a starter / generator according to an embodiment of the present invention.

FIG. 4 is a diagram showing a layout of a rotation detection sensor as viewed from the continuously variable transmission side.

FIG. 5 is a schematic view of a magnet ring for a rotor angle sensor.

FIG. 6 is a schematic view of a magnet ring for a pulsar sensor.

FIG. 7 is a schematic diagram of a magnet ring for a pulser sensor according to a modification.

FIG. 8 is a perspective view showing an arrangement of a crank angle sensor and a pulser sensor.

FIG. 9 is a perspective view showing a modification of the arrangement of the crank angle sensor and the pulser sensor.

FIG. 10 is a sectional view showing an example of mounting a sensor case.

FIG. 11 is a side view of a main part of a rotor yoke of the outer rotor.

FIG. 12 is a block diagram of a control system of the starter / generator.

FIG. 13 is a diagram showing a magnetic flux density distribution when the starter / generator functions as a starter.

FIG. 14 is a diagram showing a magnetic flux density distribution when the starter / generator functions as a generator.

FIG. 15 is a cross-sectional view of a starter / generator according to a second embodiment.

FIG. 16 is a view of a stator portion of a starter / generator according to a second embodiment as viewed from an engine side.

FIG. 17 is a cross-sectional view of a main part of a stator showing a manner of mounting the rotor angle sensor.

FIG. 18 is a connection diagram of a sensor.

FIG. 19 is a cross-sectional view of a starter / generator according to a conventional apparatus.

FIG. 20 is a view of a stator portion of a starter / generator according to the related art, as viewed from an end of a crankshaft shaft.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Starter combined generator, 2 ... Swing unit, 28 ... Sensor case, 29 ... Rotor angle sensor, 30 ... Pulser sensor, 31 ... Substrate, 32 ... Wire harness, 33 ... Magnet ring, 50 ... Stator, 60 ... Outer rotor, 72 ... Sensor case, 73: bolt (fastening means), 201: crankshaft

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02K 7/18 H02K 7/18 B // G01B 7/30 101 G01B 7/30 101B G01D 5/245 G01D 5 / 245 X (72) Kuniaki Ikui 4-1-1 Chuo, Wako-shi, Saitama F-term in Honda R & D Co., Ltd. (Reference) 2F063 AA35 BA30 BD16 DA05 DD05 EA03 GA52 GA68 KA02 PA01 ZA01 2F077 CC02 CC08 NN04 NN17 NN24 PP12 PP14 QQ02 QQ11 VV01 VV21 3G019 HA02 HA09 HA13 5H607 BB02 CC07 DD03 FF22 HH01

Claims (7)

[Claims] 1. A starter / generator provided with a brushless rotating electric machine on a crankshaft portion of an engine, further comprising a rotor angle sensor for detecting a rotation angle of the rotating electric machine, wherein the rotor angle sensor is attached to a stator of the rotating electric machine. A starter / generator that is characterized in that: 2. The stator according to claim 1, wherein the rotor angle sensor is disposed on an engine side of the stator.
The starter / generator according to claim 1, wherein the generator is mounted by fastening means engaging from the opposite side of the engine. 3. A rotor connected to a crankshaft of an engine.
And a brushless starter / generator having a stator, comprising a pulser sensor for ignition trigger and a rotor angle sensor housed in a common sensor case on the stator and arranged close to each other. Starter dual-purpose generator. 4. The starter / generator according to claim 3, wherein in the crankshaft direction, the pulsar sensor is arranged closer to the engine, and the rotor angle sensor is arranged closer to the end of the crankshaft. 5. The generator according to claim 3, wherein the pulser sensor and the rotor angle sensor are arranged at regular intervals in the rotation direction of the crankshaft. 6. The rotor angle sensor includes a plurality of elements arranged in a row in the crankshaft rotation direction, and the pulsar sensor is located within a width of the rotor angle sensor including the plurality of elements within the crankshaft rotation direction width. The generator combined with a starter according to claim 3 or 4, wherein the generator is arranged. 7. The magnet insertion hole, wherein the rotor has a substantially cylindrical rotor yoke having an inner peripheral surface along an outer periphery of the stator, and a plurality of magnet insertion holes are arranged in a circumferential direction of the rotor yoke. The starter / generator according to claim 3, wherein a permanent magnet is inserted into the rotor yoke with a partial gap provided between the rotor yokes.