JP2001211583A - Permanent magnet rotary motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a permanent magnet rotary motor used as both starter and generator, which gives a large driving torque when it is used as a starter motor and suppresses a torque to be driven small when it is used as a generator. SOLUTION: In the permanent magnet rotary motor, which is constituted of a stator 50 and its winding 53, a plurality of permanent magnets 62 disposed along the circumferential direction, a rotor yoke 61 of approximately cylindrical shape revolving around the outer periphery of the stator 50 and having an interpole between each magnet 62 adjacent to the other, air gaps 612, 614 are provided in partial spaces between each permanent magnet 62 and the rotor yoke 61.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a permanent magnet type rotary motor in which a rotor yoke in which a plurality of permanent magnets are arranged in a circumferential direction rotates around the outer periphery of a stator, and the rotor yoke has an auxiliary pole between the permanent magnets. In particular, the present invention relates to a permanent magnet type rotary electric motor suitable as a starter / generator for an internal combustion engine.

[0002]

2. Description of the Related Art Hitherto, a starter motor and a generator for an internal combustion engine have been separately provided, but a starter / generator device in which the respective functions are integrated is disclosed in, for example, JP-A-10-148142. ing.

On the other hand, as a starter motor for an internal combustion engine, there has been known an abduction type permanent magnet type rotary motor in which a cylindrical rotor yoke rotates around the outer periphery of a stator. Also,
In such a permanent magnet type rotary motor, a permanent magnet type in which an auxiliary pole portion is formed between adjacent permanent magnets in order to alleviate the distortion of the magnetic flux distribution between the rotor and the stator to prevent the occurrence of torque vibration. A rotary electric motor is disclosed in, for example, Japanese Patent Application Laid-Open No. 8-275476.

[0004]

In the above-mentioned conventional permanent magnet type rotary electric motor, a leakage magnetic flux having the auxiliary pole as a magnetic path is generated between the permanent magnets adjacent to each other with the auxiliary pole therebetween, so that the effective magnetic flux is reduced. Would. Therefore, in order to obtain more drive torque, it is necessary to increase the size of the permanent magnet or increase the exciting current of the stator winding, but this causes an increase in the size and weight of the motor and an increase in power consumption. I will.

Further, when one motor is to function as a starter motor when the internal combustion engine is started and as a generator when the vehicle is running, when the size of the permanent magnet is increased as described above, the motor functions as a starter motor. On the other hand, a large driving torque can be obtained, but when it functions as a generator, unnecessarily large electric power is generated. Therefore, the torque required for the internal combustion engine E to drive the starter / generator device (the driven torque) ) Becomes large.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned technical problems of the prior art, and to provide a large drive torque when functioning as a starter motor and a small driven torque when functioning as a generator. An object of the present invention is to provide a permanent magnet type rotary electric motor as a device.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a stator and its windings and a plurality of permanent magnets arranged along a circumferential direction to rotate the outer periphery of the stator. A substantially cylindrical rotor yoke, wherein the rotor yoke has a gap between each of the permanent magnets and the rotor yoke in a permanent magnet type rotary motor having an auxiliary pole portion between adjacent permanent magnets. It is characterized by.

According to the above-described feature, a gap is formed between each permanent magnet and the rotor yoke, and the leakage magnetic flux having the gap as a magnetic path is reduced, so that the effective component of the magnetic flux is increased and the driving torque is increased. I do.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is an overall side view of a scooter type motorcycle in which a permanent magnet type rotary electric motor according to the present invention is applied to a starter / generator device.

The vehicle body front part 3a and the vehicle body rear part 3b are connected via a low floor part 4, and the vehicle body frame forming the framework of the vehicle body is generally composed of a down tube 6 and a main pipe 7. A fuel tank and a storage box (both not shown) are supported by a main pipe 7, and a seat 8 is disposed above the main tank 7.

In the front part 3a of the vehicle body, the steering head 5
A handle 11 is provided above, and a front fork 12 extends downward, and a front wheel FW is supported at the lower end thereof. The upper part of the handle 11 is covered with a handle cover 13 also serving as an instrument panel. A bracket 15 projects from 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.

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

FIG. 2 is a sectional view of the swing unit 2 taken along the crankshaft 201, and the same reference numerals as those described above denote the same or equivalent parts.

The swing unit 2 is covered by a crankcase 202 formed by combining left and right crankcases 202L and 202R, and the crankshaft 201 is rotatably supported by bearings 208 and 209 fixed to the crankcase 202R. Have been. On the crankshaft 201,
A connecting rod (not shown) is connected via a crank pin 213.

The left crankcase 202L also serves as a belt-type continuously variable transmission chamber case.
Belt drive pulley 2
10 is provided rotatably. Belt drive pulley 2
10 includes a fixed pulley half 210L and a movable pulley half 210R, and the fixed pulley half 210L is fixed to the left end of the crankshaft 201 via a boss 211,
On the right side, the movable pulley half 210R is connected to the crankshaft 20.
1 and can approach / separate from the fixed-side pulley half 210L. Both pulley halves 210L,
A V-belt 212 is wound around 210R.

A cam plate 215 is fixed to the crankshaft 201 on the right side of the movable pulley half 210R.
A slide piece 215a provided on the outer peripheral end is slidably engaged with a cam plate sliding boss 210Ra formed in the axial direction at the outer peripheral end of the movable pulley half 210R. Cam plate 215 of movable pulley half 210R
Has a tapered surface inclined toward the cam plate 215 toward the outer periphery, and the tapered surface and the movable pulley half 210R
A dry weight pole 216 is accommodated in a space between the two.

When the rotation speed of the crankshaft 201 increases, the dry weight ball 216 which rotates between the movable pulley half 210R and the cam plate 215 rotates together.
However, the movable pulley half 210R is pressed by the dry weight ball 216 and moves leftward to approach the fixed pulley half 210L due to the centrifugal force. 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.

The belt drive pulley 21 is provided at the rear of the vehicle.
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 reduction mechanism 27 and the like.

A starter / generator device 1 combining a starter motor and an AC generator is provided in the right crankcase 202R. In the starter / generator device 1, the outer rotor 60 is fixed to a tapered end of the crankshaft 201 by a screw 253. The inner stator 50 disposed inside the outer rotor 60 is
9 and screwed and supported. The configuration of the starter / generator device 1 will be described later in detail with reference to FIGS.

The fan 280 has a central conical portion 280a.
Is fixed to the outer rotor 60 by bolts 246, and the fan 280 is covered by a fan cover 281 via a radiator 282.

A sprocket 231 is fixed on the crankshaft 201 between the starter / generator device 1 and the bearing 209, and the sprocket 231 drives a camshaft (not shown) from the crankshaft 201. Chains are wound around. The sprocket 231 is formed integrally with a gear 232 for transmitting power to a pump for circulating lubricating oil.

FIGS. 3 and 4 are a partially broken plan view and a side sectional view of the starter / generator device 1 (permanent magnet type rotary electric motor) taken along a plane perpendicular to the rotation axis (crankshaft 201). 6 is a plan view of the rotor yoke and a partially enlarged view thereof, and the same reference numerals as those described above denote the same or equivalent parts.

As shown in FIGS. 3 and 4, the starter / generator device 1 of this embodiment comprises a substantially cylindrical stator 50 and a substantially cylindrical outer rotor 60 which rotates around the outer periphery of the stator 50. Have been. As shown in FIGS. 4 and 5, the outer rotor 60 has a rotor yoke 61 formed by stacking ring-shaped silicon steel plates (thin plates) in a substantially cylindrical shape, and a rotor yoke as shown in FIGS. 61, a plurality of openings 611 provided in the circumferential direction
An N-pole permanent magnet 62N and an S-pole permanent magnet 62S alternately inserted through the inside, and a cup-shaped rotor case 63 connecting the rotor yoke 61 to the crankshaft 201 as shown in FIGS. It is configured.

The rotor case 63 has a claw portion 63a at a circumferential end thereof, and the rotor yoke 61 having the laminated structure is axially clamped by bending the claw portion 63a inward. Opening 61
Each of the permanent magnets 62 (62N, 62S) inserted into the rotor 1 is held at a predetermined position in the rotor yoke 61.

The stator 50 is made of a silicon steel plate (thin plate)
And includes a stator core 51 and stator salient poles 52 as shown in FIG. A stator winding 53 is wound around each of the stator salient poles 52 in a single-pole concentrated manner.
The main surface of the stator 50 is covered with a protective cover 71.

As shown in FIGS. 5 and 6, the rotor yoke 61 has twelve openings 611 into which the permanent magnets 62 are inserted in the axial direction at intervals of 30 degrees in the circumferential direction. The space between the adjacent openings 611 functions as the auxiliary pole 613.

As shown in FIG. 7, a permanent magnet 62 having a substantially drum-shaped cross section is inserted into each of the openings 611. Here, in the present embodiment, the shape of the opening 611 and the cross-sectional shape of the permanent magnet 62 are not the same, and when the permanent magnet 62 is inserted into the opening 611, the circumferential direction of each permanent magnet 62 is First gap 612 on both sides along
Are formed, and a second gap 614 is formed on both ends of each permanent magnet 62 on the stator side.

FIG. 8 is a block diagram of a control system of the starter / generator device 1, and the same reference numerals as those described above denote the same or equivalent parts.

The control unit 40 converts the output voltage VBATT of the battery 42 into a logic voltage VDD and
DC-DC converter 102 to be supplied to the IG coil 41
Control device 103 for controlling power supply to the ignition plug 43 to ignite the ignition plug 43 at a predetermined timing;
Three-phase driver 1 that converts TT into three-phase AC power and supplies it to stator winding 53 of starter / generator device 1
04.

The throttle sensor 45 detects the throttle opening θth and notifies the CPU 101 of the detected throttle opening θth. The rotor sensor 46 detects the rotation position of the outer rotor 60 and notifies the CPU 101 of the rotation position. 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 such a configuration, when the engine is started, the CPU 101 determines the excitation timing of the stator winding 53 based on the rotational position of the outer rotor 60 detected by the rotor sensor 46, and determines the power of the three-phase driver 104. AC power is supplied to each phase of the stator winding 53 by controlling the switching timing of the FET.

Each power FET (T
r1 to Tr6) are PWM controlled by the CPU 101,
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 internal combustion engine E is started, the power supply from the three-phase driver 104 to the stator winding 53 is stopped, and this time the starter / generator 1
Driven in accordance with At this time, the stator winding 5
3, an electromotive force is generated 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 with reference to FIGS.

FIG. 9 is a diagram showing a magnetic flux density distribution when the starter / generator device 1 functions as a starter motor, and FIG. 10 is a magnetic flux density distribution when the device 1 functions as a generator. FIG.

When the starter / generator device 1 functions as a starter motor, the control unit 40
When an exciting current is supplied from the battery 42 to each of the stator windings 53 through the, the magnetic field lines generated in the radial direction from the stator salient poles 52N excited to the N pole form the S pole permanent magnets 62S as shown in FIG. Pull out from the stator side surface to the back side,
Most of them pass through the core portion 615 and the auxiliary pole portion 613 of the rotor yoke 61 and return to 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. .

At this time, in the present embodiment, each permanent magnet 62
The first gap 612 is formed on both sides along the circumferential direction of the permanent magnet 62, and the leakage magnetic flux from the side of each permanent magnet 62 to the auxiliary pole portion 613 is reduced.
Through the core portion 615 of the rotor yoke 61 and further to the stator 50 via the auxiliary pole portion 613. 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 can be increased as compared with the case where the air gap 612 is not provided.

Further, in this embodiment, 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, as shown in FIG. 21 in which the inside of the broken line circle in FIG. 9 is enlarged, one of the gaps 614 (614A) is
From the auxiliary pole 613 of the rotor yoke 61 to the stator salient pole 52
S acts to efficiently guide the magnetic flux B1 to the S
The other (614B) acts to efficiently guide the magnetic flux B2 passing from the permanent magnet 62N through the inner circumferential portion 616 of the rotor yoke 61 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, the starter / generator device 1
As shown in FIG. 10, the magnetic flux generated from each of the permanent magnets 62 forms a closed magnetic path together with the salient stator poles and the stator core, as shown in FIG. Can be generated on the line.

In this embodiment, the regulator 4
4 is set to 14.5 V, and when the output voltage when the starter / generator device 1 functions as a generator reaches the regulated voltage, the transistor T on the ground side among the power FETs
r2, Tr4, Tr6 are short-circuited. As a result, a short-circuit current flows through each stator winding 53 in a delayed phase, and the lines of magnetic force passing through the stator 50 decrease,
Since the leakage magnetic flux connecting the adjacent permanent magnets 62 increases, the driven torque of the starter / generator device 1 decreases, and the load on the internal combustion engine E decreases.

That is, as shown in FIG. 21 by enlarging the inside of the broken line circle in FIG. 10, the adjacent permanent magnets 62S, 62N
The magnetic flux B3 passing through the outer circumferential portion 617 of the rotor yoke 61, the magnetic flux B4 passing through the auxiliary pole portion 613 of the rotor yoke 61, and the inner circumferential portion 616 of the rotor yoke 61
, And a magnetic flux B6 passing through the inner circumferential portion 616 of the rotor yoke 61, the air gap, and the stator salient pole 52N.

As described above, according to this embodiment, the rotor yoke 61 of the outer rotor 60 is
In the permanent magnet type rotary electric motor having the auxiliary pole portion 613 between the permanent magnets 62 and the rotor yoke 61, the gap 6
12 (614), the leakage flux between adjacent permanent magnets is reduced, and the outer rotor 60 and the stator 50
And the magnetic flux perpendicularly intersecting the air gap between them increases. Therefore, the drive torque when functioning as a starter motor can be increased without increasing the driven torque when causing the permanent magnet type rotary electric motor to function as a generator.

FIG. 11 is a diagram showing a plan view of a rotor yoke 61a according to a second embodiment of the present invention, and FIG.
It is a partial enlarged view in the state where a was inserted, and the same numerals as the above represent the same or equivalent parts.

In this embodiment, the opening 611a of the rotor yoke 61a has a substantially trapezoidal shape, and a permanent magnet 62a having a rectangular cross section is inserted through the opening 611a.
As a result, on both sides along the circumferential direction of the permanent magnets 62a, air gaps 612a are formed to prevent magnetic flux leakage between the adjacent permanent magnets 62a. Also, since the air gap 614a for limiting the magnetic path in the circumferential direction is formed, the same effect as described above is achieved.

FIG. 13 is a view showing a planar shape of a rotor yoke 61b according to a third embodiment of the present invention, and FIG.
It is a partial enlarged view in the state where b was inserted, and the same code as the above represents the same or equivalent part.

In the present embodiment, the opening 611b of the rotor yoke 61b is shaped like a drum and has an irregular shape.
A permanent magnet 62b having a drum-shaped cross section is inserted through b. As a result, air gaps 612b for preventing magnetic flux leakage between adjacent permanent magnets 62b are formed on both sides along the circumferential direction of the permanent magnets 62b.
Since the air gap 614b for limiting the magnetic path in the circumferential direction is also formed on the stator side at both end portions, the same effect as described above is achieved.

FIG. 15 is a view showing a planar shape of a rotor yoke 61c according to a fourth embodiment of the present invention, and FIG. 16 is a view showing a permanent magnet 62 in an opening 611c of the rotor yoke 61c.
FIG. 4 is a partially enlarged view in a state where c is inserted, and the same reference numerals as those described above denote the same or equivalent parts.

In this embodiment, the opening 611c of the rotor yoke 61c has an irregular shape with notches provided on both sides of the drum-shaped portion, and the permanent magnet 62c having a drum-shaped cross section is inserted into the opening 611c. . As a result, adjacent permanent magnets 62c are provided on both sides of the permanent magnet 62c along the circumferential direction.
A gap 612c for preventing magnetic flux leakage between the permanent magnets 62c is formed, and a gap 614c for limiting the magnetic path in the circumferential direction is also formed on the stator side at both ends of each permanent magnet 62c. A similar effect is achieved.

FIG. 17 is a diagram showing a plan view of a rotor yoke 61d according to a fifth embodiment of the present invention, and FIG. 18 is a diagram showing a permanent magnet 62 in an opening 611d of the rotor yoke 61d.
FIG. 5 is a partially enlarged view in a state where d is inserted, and the same reference numerals as those described above denote the same or equivalent parts.

In this embodiment, the opening 611d of the rotor yoke 61d is shaped like a drum.
A permanent magnet 62d having a drum-shaped cross section is inserted through d. As a result, air gaps 612d for preventing magnetic flux leakage between adjacent permanent magnets 62d are formed on both sides of the permanent magnet 62d along the circumferential direction.

Further, apart from the opening 611d, a rotor yoke 61d corresponding to both ends of each permanent magnet 62d is provided.
Air gap 61 for limiting the magnetic path in the circumferential direction
Since 4d is formed in a notch shape, the same effect as described above is achieved.

FIG. 19 is a view showing a plan shape of a rotor yoke 61e according to a sixth embodiment of the present invention, and FIG. 20 is a view showing a permanent magnet 62 in an opening 611e of the rotor yoke 61e.
3 is a partially enlarged view in a state where e is inserted, and the same reference numerals as those described above represent the same or equivalent parts.

In the present embodiment, the opening 611e of the rotor yoke 61e is shaped like a drum, and the opening 611e is
A permanent magnet 62e having a drum-shaped cross section is inserted through e. As a result, air gaps 612e for preventing leakage magnetic flux between adjacent permanent magnets 62e are formed on both sides along the circumferential direction of the permanent magnets 62e.
Since the air gap 614e for limiting the magnetic path in the circumferential direction is also formed on the stator side at both end portions, the same effect as described above is achieved.

In each of the embodiments described above, the case where the present invention is applied to an abduction type rotary electric machine has been described as an example. However, the present invention is not limited to this, and the present invention is not limited to this. The present invention can be similarly applied to an adduction type rotating electric machine in which a rotor rotates.

FIG. 23 is a plan view showing an example of application to an adduction type electric machine according to the seventh embodiment of the present invention. A substantially cylindrical stator 90 and a substantially cylindrical column rotating inside the stator 90 are shown. And a rotor 80 having a shape. Both the rotor 80 and the stator 90 are formed by stacking silicon steel plates (thin plates).

A stator winding 92 is wound around each of the stator salient poles 91 of the stator 90. The rotor 80 has twelve openings 811 having a substantially arc-shaped cross section and having a permanent magnet 85 made of a neodymium-based material inserted in the axial direction at intervals of 30 degrees in the circumferential direction. I have. Each permanent magnet 82 is arranged so as to protrude toward the center of rotation. The space between the adjacent openings 811 functions as an auxiliary pole 813.

Also in this embodiment, the shape of the opening 811 and the cross-sectional shape of the permanent magnet 85 are not the same, and when the permanent magnet 85 is inserted into the opening 811, A gap 812 is formed on both sides along the direction.

According to such a configuration, when the starter / generator device 1 functions as a starter motor, an exciting current is supplied from the battery 42 to each stator winding 92 via the control unit 40, as shown in FIG. As shown in an enlarged manner, the stator salient pole 9 excited to the N pole
1 (N) passes from the front surface of the S-pole permanent magnet 82S to the back surface of the S-pole permanent magnet 82S.
, And the stator salient poles 91 excited in the adjacent south poles
Via (S), the process returns to the salient stator poles 91 (N) excited to the N pole.

Here, in this embodiment, air gaps 812 are formed on both sides along the circumferential direction of each of the permanent magnets 82, and the leakage magnetic flux from the side of each of the permanent magnets 82 to the auxiliary pole 813 is reduced. Most of the lines of magnetic force are
Through the auxiliary pole portion 813 to the stator 90 side.
As a result, the vertical component of the magnetic flux passing through the air gap between the rotor 80 and the stator 90 increases, so that the driving torque can be increased as compared with the case where the air gap 812 is not provided.

On the other hand, the starter / generator device 1
Function as a generator, each permanent magnet 82
The magnetic flux generated from the stator 9
Since a closed magnetic path is formed together with the 0 core portion, a generated current corresponding to the rotation speed of the rotor 80 can be generated in the stator winding.

Further, by employing a neodymium-based magnet having a strong magnetic force as the permanent magnet 82 and arranging the arc-shaped permanent magnet 82 so as to protrude toward the center of rotation,
Since the magnetic force directed from the outer surface of the permanent magnet to the stator 90 is reduced, friction when functioning as a generator can be significantly reduced. Even in this case, the driving torque when functioning as a starter can be sufficiently ensured by the operation of the auxiliary pole portion 813.

[0063]

As described above, according to the present invention, a gap is provided between each permanent magnet and the rotor in the permanent magnet type rotary motor in which the rotor has an auxiliary pole portion between the permanent magnets. Leakage magnetic flux between adjacent permanent magnets is reduced, and magnetic flux perpendicular to the air gap between the rotor and the stator is increased. Therefore, the drive torque when functioning as a starter motor can be increased without increasing the driven torque when causing the permanent magnet type rotary electric motor to function as a generator.

[Brief description of the drawings]

FIG. 1 is an overall side view of a scooter type motorcycle in which a permanent magnet type rotary electric motor of the present invention is applied to a starter / generator device.

FIG. 2 is a sectional view taken along a crankshaft of the swing unit of FIG. 1;

FIG. 3 is a partially broken plan view of a starter / generator device (permanent magnet rotary electric motor) in a plane perpendicular to a rotation axis (crankshaft).

FIG. 4 is a side sectional view of FIG. 3;

FIG. 5 is a plan view of a rotor yoke.

FIG. 6 is a side view of the rotor yoke.

FIG. 7 is a partially enlarged view of a rotor yoke.

FIG. 8 is a block diagram of a control system of the starter / generator device.

FIG. 9 is a diagram for explaining the function (at the time of electric power) of a gap provided in the rotor yoke.

FIG. 10 is a view for explaining the function (at the time of power generation) of a gap provided in the rotor yoke.

FIG. 11 is a diagram showing a planar shape of a rotor yoke according to a second embodiment of the present invention.

FIG. 12 is a partially enlarged view of a state where a permanent magnet is inserted into an opening of FIG. 11;

FIG. 13 is a view showing a planar shape of a rotor yoke according to a third embodiment of the present invention.

FIG. 14 is a partially enlarged view of a state where a permanent magnet is inserted into the opening of FIG. 13;

FIG. 15 is a diagram showing a planar shape of a rotor yoke according to a fourth embodiment of the present invention.

FIG. 16 is a partially enlarged view in a state where a permanent magnet is inserted into the opening of FIG. 15;

FIG. 17 is a diagram showing a planar shape of a rotor yoke according to a fifth embodiment of the present invention.

18 is a partially enlarged view in a state where a permanent magnet is inserted into the opening of FIG.

FIG. 19 is a diagram showing a planar shape of a rotor yoke according to a sixth embodiment of the present invention.

20 is a partially enlarged view in a state where a permanent magnet is inserted into the opening of FIG. 19;

FIG. 21 is a partially enlarged view of FIG. 9;

FIG. 22 is a partially enlarged view of FIG. 10;

FIG. 23 is a diagram showing a planar shape according to a seventh embodiment of the present invention.

24 is a partially enlarged view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Starter and generator device, 50 ... Stator, 5
DESCRIPTION OF SYMBOLS 1 ... Stator core, 52 ... Stator salient pole, 53 ... Stator winding, 60 ... Outer rotor, 61 ... Rotor yoke,
62 (62N, 62S), 82 (82N, 82S) permanent magnets, 63 ... rotor case, 71 ... protective cover, 80
... rotor, 90 ... stator, 201 ... crankshaft, 61
DESCRIPTION OF SYMBOLS 1 ... Opening part, 612 ... 1st space | gap, 613 ... Complementary electrode part, 61
4: Second gap

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H02K 21/22 H02K 21/22 M (72) Inventor Seiji Onozawa 1-4-1, Chuo, Wako, Saitama No. 1 F-term in Honda R & D Co., Ltd. (Reference) 5H002 AA02 AA09 AB07 AC04 AC06 AE08 5H607 AA11 BB01 BB02 BB14 BB17 CC01 DD02 EE46 FF24 FF33 FF36 5H621 GA01 GA12 GA16 HH01 JK02 JK05 5H622 AA03 PP02 CA03 PP02

Claims (8)

[Claims] 1. A stator including a stator and its windings, and a rotor yoke rotating with respect to the stator, wherein the rotor yoke includes a plurality of permanent magnets along a circumferential direction, and a supplementary pole portion is provided between adjacent permanent magnets. The permanent magnet type rotary motor according to claim 1, wherein a gap is provided in a part between each of the permanent magnets and the rotor yoke. 2. The permanent magnet type rotary electric motor according to claim 1, wherein the gap is formed on a side portion along a circumferential direction of each permanent magnet. 3. The permanent magnet type rotary electric motor according to claim 1, wherein the air gap is formed at both ends of each permanent magnet on a stator side. 4. The permanent magnet type rotary electric motor according to claim 3, wherein a gap formed on a side of the permanent magnet is larger than a gap formed on a stator side at both ends of the permanent magnet. . 5. The permanent magnet type rotary electric motor according to claim 2, wherein the air gap is formed on both sides along the circumferential direction of each permanent magnet. 6. The permanent magnet type rotary electric motor according to claim 3, wherein a gap formed on both sides of the permanent magnet on the stator side is equal to an air gap between the rotor yoke and the stator. 7. The permanent magnet type rotary electric motor according to claim 1, wherein the permanent magnet type rotary electric motor is an external rotation type electric machine in which a substantially cylindrical rotor yoke rotates around the outer periphery of a substantially cylindrical stator. 8. The permanent magnet type rotary electric motor according to claim 1, wherein the permanent magnet type rotary electric motor is an adduction type electric machine in which a substantially cylindrical rotor yoke rotates on an inner periphery of a substantially cylindrical stator.