WO2018047746A1

WO2018047746A1 - Rotary machine

Info

Publication number: WO2018047746A1
Application number: PCT/JP2017/031660
Authority: WO
Inventors: 典樹森本; 萩村　将巳
Original assignee: 株式会社ミツバ
Priority date: 2016-09-09
Filing date: 2017-09-01
Publication date: 2018-03-15
Also published as: JP6720032B2; JP2018042421A

Abstract

If B, L, M, N, and X denote natural numbers, S denotes the number of slots (15), P denotes the number of magnetic poles of a magnet (9), and A denotes the smallest value among values of L that satisfy X = 90(2L-1)/{(360/S)×(P/2)}, the number S of slots (15), the number P of magnetic poles, and an electrical angle θ between a second Hall IC (50b) and a third Hall IC (50c) are set such that S = 2N, P = S±2, θ = 90(2B-1), and B < A. At least one among the second Hall IC (50b) and the third Hall IC (50c) is disposed at a position offset from the circumferential center of the slots (15), and a notch part that is capable of receiving any one among the second Hall IC (50b) and the third Hall IC (50c) is formed in at least one tooth part (13).

Description

Rotating electric machine

The present invention relates to a rotating electrical machine.
This application claims priority on September 9, 2016 based on Japanese Patent Application No. 2016-176422 for which it applied to Japan, and uses the content for it here.

For example, as a rotating electrical machine used for a motorcycle or the like, one having two functions of an engine start function and a regenerative power generation function using regenerative energy is known. This type of rotating electrical machine includes a bottomed cylindrical rotor (rotor) fixed to a crankshaft and a stator (stator) fixed to an engine case. While a magnet is provided on the inner peripheral surface side of the rotor, teeth on which a plurality of coils are wound are provided radially on the stator.

And the magnetic flux which flows into a tooth changes with rotation of a rotor, and this becomes an electromotive force and an electric current flows into a coil. The current flowing through each coil is stored in the battery via the lead wire and connected to the lead wire extending from the outside, or used for power supply to the attached electric equipment.
The stator is provided with a position detection sensor that detects the rotational position of the rotor. The commutation timing of the coil is controlled based on the detection signal detected by the position detection sensor.

The position detection sensor is housed in the sensor case (sensor holder), the sensor case, a plurality of Hall ICs that detect changes in the magnetic poles of the rotor, and housed in the sensor case. And a circuit board to be connected.
The sensor case is formed by integrally forming a box-shaped sensor case main body (case body) having an opening on one surface and a plurality of holder pieces suspended from the sensor case main body. Each holder piece is inserted one by one into a plurality of slots formed between adjacent teeth. The circuit board is housed in the sensor case body, and the Hall IC is housed in the leg portion.

JP 2009-89588 A

Since the position of each Hall IC differs depending on the specifications of the rotating electrical machine, depending on the specifications, if one Hall IC (leg part) is arranged in one slot, the position detection sensor (sensor case) becomes large. There is a possibility.
For example, in a rotating electrical machine in which the number of coil phases is set to two, each Hall IC needs to be arranged with an electrical angle of 90 °.

In a two-phase rotating electrical machine, in the case of a rotating electrical machine in which the number of magnetic poles of the magnet is set to 14 and the number of slots is set to 12, when trying to place one Hall IC at the center of each slot, The angle between the Hall ICs is 90 ° in mechanical angle. For this reason, the space occupied by the position detection sensor and the sensor case may increase in size, and the manufacturing cost of the position detection sensor may increase.

The present invention provides a rotating electrical machine that can reduce the size of the position detection sensor and reduce the manufacturing cost.

According to the first aspect of the present invention, the rotating electrical machine is wound around the stator in which a plurality of teeth are arranged in the circumferential direction and a slot is formed between the adjacent teeth, and the plurality of teeth. A coil having a number of phases set to two phases, a rotor provided rotatably with respect to the stator, and having a plurality of magnets arranged so that magnetic poles alternate along the circumferential direction, and a plurality of A first magnetic sensor and a second magnetic sensor which are arranged in any of the slots and detect a magnetic flux of the magnet, wherein B, L, M, N and X are natural numbers, and the number of the slots is S, where P is the number of magnetic poles of the magnet, and A is the minimum value of L satisfying X = 90 (2L−1) / {(360 / S) × (P / 2)}. Number S of magnetic poles , And the electrical angle θ between the first magnetic sensor and the second magnetic sensor,
S = 2N
P = S ± 2
θ = 90 (2B-1)
B <A
At least one of the first magnetic sensor and the second magnetic sensor is disposed at a position shifted from the center in the circumferential direction of the slot, and at least one of the teeth A recess capable of receiving at least one of the first magnetic sensor and the second magnetic sensor is formed.

With this configuration, even in a rotating electrical machine in which the number of phases of the coil is set to two phases, the mechanical angle between the first magnetic sensor and the second magnetic sensor can be set as small as possible. For this reason, even if it is a case where the sensor case holding a 1st magnetic sensor and a 2nd magnetic sensor is provided, this sensor case can be reduced in size. Moreover, the manufacturing cost of the position detection sensor comprised with a 1st magnetic sensor or a 2nd magnetic sensor can be reduced.
Further, at least one of the first magnetic sensor and the second magnetic sensor is disposed at a position shifted from the center in the circumferential direction of the slot, and one of the first magnetic sensor and the second magnetic sensor is disposed on the corresponding tooth. By forming a recess capable of receiving the two, the two magnetic sensors can be respectively disposed in desired slots while suppressing the recess to the minimum necessary size. For this reason, a sensor case can be reduced in size, suppressing the characteristic deterioration of a rotary electric machine.

According to a second aspect of the present invention, in the rotating electrical machine according to the first aspect of the present invention, the first magnetic sensor and the second magnetic sensor are disposed in one of the slots, and the slot is The recess is formed in the two teeth to be formed.

This configuration makes it possible to minimize the sensor case and further reduce the manufacturing cost of the position detection sensor.

According to a third aspect of the present invention, the rotating electrical machine according to the first aspect or the second aspect of the present invention includes a third magnetic sensor that detects a magnetic flux of the magnet, and the rotating electric machine includes: One has a main magnetic pole portion having a different polarity from the magnetic pole of the adjacent magnet, and a sub magnetic pole portion having the same polarity as the magnetic pole of the adjacent magnet, and the main magnetic pole portion and the sub magnetic pole portion are The first magnetic sensor and the second magnetic sensor are disposed at positions corresponding to the main magnetic pole portion and are disposed adjacent to each other in the rotation axis direction of the rotor, and at positions corresponding to the sub magnetic pole portion. The third magnetic sensor is disposed.

With this configuration, the absolute position on the circumference of the rotor can be detected using the third magnetic sensor in addition to the first magnetic sensor and the second magnetic sensor. For this reason, for example, the ignition timing of the engine can be controlled by the rotating electrical machine.

According to a fourth aspect of the present invention, in the rotating electrical machine according to the third aspect of the present invention, the third magnetic sensor includes the slot in which the first magnetic sensor and the second magnetic sensor are disposed. Arranged in the same slot.

By configuring in this way, the position detection sensor including the three magnetic sensors can be reduced in size and the manufacturing cost can be reduced.

According to the fifth aspect of the present invention, the rotating electrical machine is wound around the stator in which a plurality of teeth are arranged in the circumferential direction and a slot is formed between the adjacent teeth, and the plurality of teeth. A coil having a number of phases set to three phases, a rotor provided rotatably with respect to the stator, and having a plurality of magnets arranged so that magnetic poles alternate along the circumferential direction, and a plurality of A first magnetic sensor, a second magnetic sensor, and a third magnetic sensor that are arranged in any one of the slots and detect magnetic flux of the magnet, and at least two adjacent teeth are set to in-phase teeth Where B, C, M, N, and X are natural numbers, the number of slots is S, the number of magnetic poles of the magnet is P, and X = 120 M / {(360 / S) × (P / )} Of M that satisfies, when a minimum value and A,
The number of slots S, the number of magnetic poles P, the electrical angle θ1 between the first magnetic sensor and the second magnetic sensor, and the electrical angle θ2 between the second magnetic sensor and the third magnetic sensor are: ,
S = 3N
When S is an even number, P = S ± 2
When S is an odd number, P = S ± 1
θ1 = 120 + 360 (B−1)
θ2 = 120 + 360 (C−1)
θ1 + θ2 <240A
And at least one of the first magnetic sensor, the second magnetic sensor, and the third magnetic sensor is disposed at a position shifted from the circumferential center of the slot, and at least One tooth has a recess that can receive any of the first magnetic sensor, the second magnetic sensor, and the third magnetic sensor.

With this configuration, even in a rotating electrical machine in which the number of phases of the coil is set to three phases, the mechanical angle between the first magnetic sensor and the second magnetic sensor, and the second magnetic sensor and the first magnetic sensor The mechanical angle between the three magnetic sensors can be set as small as possible. For this reason, even if it is a case where the sensor case holding a 1st magnetic sensor, a 2nd magnetic sensor, and a 3rd magnetic sensor is provided, this sensor case can be reduced in size. Moreover, the manufacturing cost of the position detection sensor comprised by a 1st magnetic sensor, a 2nd magnetic sensor, and a 3rd magnetic sensor can be reduced.
Further, at least one of the first magnetic sensor, the second magnetic sensor, and the third magnetic sensor is disposed at a position shifted from the center in the circumferential direction of the slot, and the first magnetic sensor and the second magnetic sensor are disposed on the corresponding teeth. By forming a recess that can accept either of the third magnetic sensor and the third magnetic sensor, the three magnetic sensors can be respectively disposed in desired slots while suppressing the recess to the minimum required size. For this reason, a sensor case can be reduced in size, suppressing the characteristic deterioration of a rotary electric machine.

According to a sixth aspect of the present invention, in the rotating electrical machine according to the fifth aspect of the present invention, at least two of the first magnetic sensor, the second magnetic sensor, and the third magnetic sensor are It is arrange | positioned at one said slot, and the said recessed part is formed in the two said teeth which form this slot.

According to a seventh aspect of the present invention, the rotating electrical machine according to the fifth aspect or the sixth aspect of the present invention includes a fourth magnetic sensor that detects a magnetic flux of the magnet, and the rotating electric machine includes: One has a main magnetic pole portion having a different polarity from the magnetic pole of the adjacent magnet, and a sub magnetic pole portion having the same polarity as the magnetic pole of the adjacent magnet, and the main magnetic pole portion and the sub magnetic pole portion are The first magnetic sensor, the second magnetic sensor, and the third magnetic sensor are disposed adjacent to each other in the rotational axis direction of the rotor, and correspond to the main magnetic pole portion, and the sub-magnetic pole The fourth magnetic sensor is arranged at a position corresponding to the part.

With this configuration, the absolute position on the circumference of the rotor can be detected using the fourth magnetic sensor in addition to the first magnetic sensor, the second magnetic sensor, and the third magnetic sensor. For this reason, for example, the ignition timing of the engine can be controlled by the rotating electrical machine.

According to an eighth aspect of the present invention, in the rotating electric machine according to the seventh aspect of the present invention, the fourth magnetic sensor is any one of the first magnetic sensor, the second magnetic sensor, and the third magnetic sensor. It is arranged in the same slot as the slot in which is arranged.

With this configuration, the position detection sensor including the four magnetic sensors can be reduced in size and the manufacturing cost can be reduced.

According to the above rotating electrical machine, the mechanical angle between the magnetic sensors can be set as small as possible even in a rotating electrical machine in which the number of coils is set to two or three phases. For this reason, even if it is a case where the sensor case holding each sensor is provided, this sensor case can be reduced in size. Moreover, the manufacturing cost of the position detection sensor comprised with each magnetic sensor can be reduced.
Furthermore, by disposing at least one of each magnetic sensor at a position shifted from the center in the circumferential direction of the slot and forming a recess that can receive the magnetic sensor in the corresponding tooth, the recess is minimized. Each magnetic sensor can be arranged in a desired slot while suppressing the size. For this reason, a sensor case can be reduced in size, suppressing the characteristic deterioration of a rotary electric machine.

It is sectional drawing of the rotary electric machine in 1st Embodiment of this invention. It is the schematic block diagram which looked at the stator and rotor in 1st Embodiment of this invention from the axial direction. It is an expanded view by the side of the internal peripheral surface of the rotor yoke in 1st Embodiment of this invention. It is a perspective view of the stator and position detection sensor in 1st Embodiment of this invention. It is a disassembled perspective view of the position detection sensor in 1st Embodiment of this invention. It is the schematic block diagram which looked at the stator and rotor in 2nd Embodiment of this invention from the axial direction. It is an expanded view of the inner peripheral surface side of the rotor yoke in 2nd Embodiment of this invention.

Next, an embodiment of the present invention will be described based on the drawings.

(First embodiment)
(Rotating electric machine)
FIG. 1 is a cross-sectional view of the rotating electrical machine 1. FIG. 2 is a schematic configuration diagram of the stator 3 and the rotor 5 constituting the rotating electrical machine 1 as seen from the axial direction.
As shown in FIGS. 1 and 2, the rotating electrical machine 1 is used as a starter generator for a vehicle engine such as a motorcycle. The rotating electrical machine 1 is a two-phase brushless type rotating electrical machine. The rotating electrical machine 1 is wound around the stator 3 fixed to the engine block 2, the rotor 5 fixed to the crankshaft 4 of the engine, the position detection sensor 6 that detects the rotational position of the rotor 5, and the stator 3. The coil 7 is provided.
In the following description, the rotational axis direction of the rotor 5 in the rotating electrical machine 1 is simply referred to as an axial direction, the rotational direction of the rotor 5 is referred to as a circumferential direction, and the radial direction of the rotor 5 orthogonal to the axial direction and the circumferential direction is simply referred to as the axial direction. This will be described as a radial direction.

(Rotor)
The rotor 5 includes a rotor yoke 8 formed into a substantially bottomed cylindrical shape by appropriately forming a metal plate made of a ferromagnetic member. The rotor yoke 8 bends and extends in the same direction as the cylindrical portion 8b from the radial center of the bottom portion 8a, a cylindrical portion 8b that bends and extends from the outer periphery of the bottom portion 8a toward the engine block 2 side. A boss cylinder portion 8c.

The tip of the crankshaft 4 is inserted into the boss cylinder portion 8c. Further, the crankshaft 4 is fastened and fixed to the boss cylinder portion 8c by bolts 10. Thereby, the crankshaft 4 and the rotor 5 rotate integrally.
A plurality (14 in the first embodiment) of magnets 9 are arranged at equal intervals in the circumferential direction on the inner peripheral surface of the cylindrical portion 8b.

FIG. 3 is a development view of the inner peripheral surface side of the rotor yoke 8.
As shown in the figure, with the exception of one magnet 9 except for one, all other magnets 9 have a surface (inner surface) facing the center of the rotation axis of the rotor 5 that is either N-pole or S-pole. Magnetized. One magnet 9c is provided with a short sub-magnetic pole portion 129 whose inner surface is magnetized to N pole on one end side of the main magnetic pole portion 119 whose inner surface is magnetized to S pole.
In the following description, in FIG. 3, the magnet 9 whose entire inner surface is magnetized to the N pole is the N pole magnet 9a, the magnet 9 whose entire inner surface is magnetized to the S pole is the S pole magnet 9b, The magnet 9 provided with the magnetic pole portion 119 and the sub magnetic pole portion 129 is referred to as a two-pole magnet 9c.

In the rotor 5, a two-pole magnet 9c is arranged between a specific pair of adjacent S-pole magnets 9b, and an N-pole magnet 9a is arranged between other adjacent S-pole magnets 9b.
Therefore, the N pole and the S pole appear alternately on the inner peripheral side of the rotor 5 except for one end side in the axial direction (the upper end side in FIG. 3). On the other hand, on one end side in the axial direction, N poles appear continuously by the sub-magnetic pole portion 129 of the two-pole magnet 9c and three magnets before and after (the front and rear in the circumferential direction).
As will be described in detail later, the region on one end side in the axial direction of the magnet 9 is used as a target for detecting the ignition timing of the engine, and the remaining region in the axial direction of the magnet 9 is mainly composed of the coil 7. Used as a target for detecting commutation timing.

(Stator)
FIG. 4 is a perspective view of the stator 3 and the position detection sensor 6.
As shown in FIGS. 1, 2, and 4, the stator 3 includes a stator iron core 11 formed by laminating electromagnetic steel plates, for example, and a plurality of coils 7 wound around the stator iron core 11. The stator iron core 11 includes a main body portion 12 formed in a substantially annular shape, and a plurality (12 in the first embodiment) of teeth portions 13 that protrude radially outward from the outer peripheral surface of the main body portion 12. And have.
The main body 12 is formed with a plurality of through holes 12a penetrating in the axial direction at equal intervals in the circumferential direction. Bolts 18 are inserted into the through holes 12 a, and the bolts 18 are screwed into the engine block 2. Thereby, the stator iron core 11 is fastened and fixed to the engine block 2.

A claw piece 14 is provided at the tip of each tooth portion 13 so as to project from the tip to both sides in the circumferential direction. In addition, slots 15 are formed between adjacent tooth portions 13. That is, in the first embodiment, twelve slots 15 are formed.
A resin insulator 19 that covers the periphery of the teeth 13 is attached to each of the teeth 13. Then, the coil 7 is inserted into the slot 15, and the coil 7 is wound around each tooth portion 13 from above the insulator 19.

As shown in detail in FIG. 2, the teeth portion 13 is continuously assigned to the three teeth portions 13 adjacent to each other in the circumferential direction in the A phase of the two phases, and the B phase of the two phases is It is continuously assigned to three teeth 13 adjacent in the circumferential direction. Furthermore, the teeth part 13 is allocated so that the three A phases and the three B phases are alternately arranged in the circumferential direction. That is, the teeth portion 13 is assigned in the order of A phase, A phase, A phase, B phase, B phase, B phase, A phase, A phase, A phase, B phase, B phase, and B phase in the circumferential direction. Yes. And the terminal part of the coil 7 wound by each teeth part 13 is electrically connected to the control apparatus not shown.

Among the plurality of teeth 13, the claw pieces 14 of two predetermined adjacent teeth 13 (in the first embodiment, two adjacent A-phase teeth 13) are attached to the two teeth 13 by the two teeth 13. A notch 16 is formed in each part of the formed slot 15 side. A notch 19 a is also formed in the insulator 19 so as to correspond to the notch 16. The two notches 16 (notches 19a) are formed between the slightly outer side and the axially outer end of the claw piece 14 in the axial direction. The two notches 16 form a substantially rectangular fitting groove 17 straddling two claw pieces 14 adjacent in the circumferential direction. A part of the position detection sensor 6 is fitted into the fitting groove 17.
In the following description, the two tooth portions 13 in which the notch portions 16 are formed in the claw piece 14 are referred to as specific tooth portions 13 A in order to distinguish them from the other tooth portions 13.

(Position detection sensor)
FIG. 5 is an exploded perspective view of the position detection sensor 6.
As shown in FIGS. 4 and 5, the position detection sensor 6 includes a resin sensor case 60 disposed on one end side in the axial direction of the stator core 11 and two circuit boards 55 A housed in the sensor case 60. , 55B (first circuit board 55A, second circuit board 55B).
In the following description, the direction of the position detection sensor 6 is the direction in which the position detection sensor 6 is disposed on the stator core 11. That is, the axial direction, the circumferential direction, and the radial direction in the following description coincide with the axial direction, the circumferential direction, and the radial direction of the rotor 5 in the rotating electrical machine 1.

The

circuit boards

55A and 55B are arranged so that their surface directions are along the circumferential direction. Each of the

circuit boards

55A and 55B is formed in a substantially T shape. Each

circuit board

55A, 55B is formed integrally with the insertion portion 56 formed to be elongated along the axial direction and the axially outer end of the insertion portion 56, and is formed to be elongated along the circumferential direction. The sensor line connecting portion 57 is used.

The insertion portion 56 of the first circuit board 55A is surface-mounted on the radially outer surface (the surface facing the magnet 9 of the rotor 5) so that the first Hall IC 50a and the second Hall IC 50b are aligned in the axial direction. Yes. A third Hall IC 50c is surface-mounted on the radially outer surface of the insertion portion 56 of the second circuit board 55B. The second Hall IC 50b and the third Hall IC 50c are mounted so as to have the same height in the axial direction.

More specifically, as shown in FIG. 3, among the Hall ICs 50a to 50c, the first Hall IC 50a is disposed at a position M1 facing one end side in the axial direction on the inner circumferential surface of the rotor yoke 8, and the second Hall IC 50a to 50c. The IC 50 b and the third Hall IC 50 c are disposed at a position M 2 facing the substantially center in the axial direction on the inner peripheral surface of the rotor yoke 8.

In other words, the second Hall IC 50b and the third Hall IC 50c are arranged on the same line in the rotation direction (circumferential direction) of the rotor 5. On the other hand, the first Hall IC 50a is arranged at a position shifted from the line on which the second Hall IC 50b and the third Hall IC 50c are arranged. The first Hall IC 50a and the second Hall IC 50b are arranged so as to be located on the same line in the direction orthogonal to the rotation direction of the rotor 5, that is, in the axial direction.

Thereby, the first Hall IC 50a detects the switching of the magnetic flux of each of the

pole magnets

9a, 9b, 9c at a height passing through the sub magnetic pole portion 129 of the two-pole magnet 9c. On the other hand, the second Hall IC 50b and the third Hall IC 50c detect the switching of the magnetic flux of each of the

pole magnets

9a, 9b, 9c at a height passing through the main magnetic pole portion 119 of the two-pole magnet 9c.

Returning to FIG. 4 and FIG. 5, two sensor line through holes 58 a are formed in the sensor line connecting portions 57 of the circuit boards 55 A and 55 B substantially at the center in the circumferential direction. One end of a sensor wire (not shown) is inserted into the through hole 58a for the sensor wire and connected to each

circuit board

55A, 55B by soldering or the like. The other end of the sensor line is electrically connected to a control device (both not shown).
Two lead wire through holes 58b are formed on one side in the circumferential direction of the sensor line connecting portion 57, respectively. Terminals of lead wires (not shown) are connected to these lead wire through holes 58b so as to straddle the two

circuit boards

55A and 55B.

The sensor case 60 is made of resin. The sensor case 60 includes a sensor holder 70 in which the

circuit boards

55A and 55B are accommodated, a sensor press 90 that is attached to the sensor holder 70 and prevents the

circuit boards

55A and 55B from being detached from the sensor holder 70, and a sensor. And an outer frame member 20 into which the holder 70 is inserted.
The sensor holder 70 is formed by integrally molding a base portion 71 and a holder main body 72 protruding from the base portion 71 toward the other axial end side (the lower side in FIGS. 4 and 5).

The base portion 71 is formed to have an oval shape when viewed from the axial direction, and is slightly curved along the outer periphery of the stator core 11. A peripheral wall 76 is provided on the outer peripheral edge of the base portion 71 so as to protrude toward the side opposite to the holder main body 72. The peripheral wall 76 functions as an inlay portion 76 a when the sensor holder 70 is inserted into the outer frame member 20, and also functions as an inlay portion 76 b when the sensor presser 90 is attached to the sensor holder 70.

The base portion 71 is formed with two openings 73 through which the insertion portions 56 of the

circuit boards

55A and 55B can be inserted. On the radially inner side of each opening 73, a guide wall 74 is provided so as to project toward one axial direction (the upper side in FIGS. 4 and 5). The guide wall 74 is for guiding a sensor wire (not shown) extending from the

circuit boards

55A and 55B to the outside of the sensor case 60. Each guide wall 74 is formed with two recesses 74a aligned in the circumferential direction. The recess 74a is formed in a substantially semicircular shape, and a sensor line (not shown) passes through each recess 74a.

The holder main body 72 is formed in a substantially bottomed cylindrical shape through which the opening 73 of the base portion 71 communicates. The holder main body 72 is formed so as to correspond to the fitting groove 17 formed in the tooth portion 13 of the stator 3. That is, the holder main body 72 is inserted into the fitting groove 17. In a state in which the holder main body 72 is inserted into the fitting groove 17, the radially outer surface of the holder main body 72 and the radially outer surface of the claw piece 14 of the tooth portion 13 are flush with each other.
The holder main body 72 has a partition wall (not shown) formed between the two openings 73 of the base portion 71, and can store the circuit boards 55 A and 55 B for each opening 73.

At the end (tip) opposite to the base portion 71 of the holder main body 72, a holding portion 77 is formed extending along the axial direction. The holding portion 77 is for suppressing backlash in the fitting groove 17 of the sensor holder 70 and increasing rigidity. The holding portion 77 includes a base portion 77a extending from the radially inner surface of the holder main body 72 and a rib portion 77b formed to project from the radially outer surface of the base portion 77a.
Base portion 77a is in contact with the inner peripheral surface of claw piece 14 of specific tooth portion 13A. The rib portion 77b is interposed between the claw pieces 14 of the specific tooth portions 13A adjacent in the circumferential direction and on the other side in the axial direction from the fitting groove 17 (notch portion 16).

With this configuration, the insertion portions 56 of the

circuit boards

55A and 55B are inserted or press-fitted from the opening 73 side of the base portion 71. At this time, the insertion portion 56 can be easily inserted into the opening 73 by being inserted along the guide wall 74 of the base portion 71. Then, by inserting the insertion portion 56 into the opening 73, the insertion portion 56 of each circuit board 55 A, 55 B is accommodated in the holder main body 72. On the other hand, the sensor line connecting portion 57 of each

circuit board

55A, 55B is disposed in contact with the base portion 71 and protruding on the base portion 71.

The holder main body 72 is inserted into the fitting groove 17 formed in the tooth portion 13 of the stator 3 as described above. The holder main body 72 accommodates the insertion portions 56 of the two

circuit boards

55A and 55B. For this reason, these two insertion parts 56 are located in the location which shifted | deviated from the center C1 of the circumferential direction of the slot 15 in which the fitting groove | channel 17 is each formed. In other words, the second Hall IC 50b and the third Hall IC 50c that are surface-mounted on the

circuit boards

55A and 55B are arranged at positions shifted from the circumferential center C1 of the slot 15, respectively. Details of the angle between the second Hall IC 50b and the third Hall IC 50c will be described later.

The sensor presser 90 has a presser body 91 placed on the base portion 71. The presser body 91 is formed in a substantially arc shape so as to extend along the inner peripheral surface (inlay portion 76 b) of the peripheral wall 76 of the base portion 71 and to be long in the longitudinal direction of the base portion 71. As a result, the presser main body 91 is inlay-fitted to the peripheral wall 76 of the base portion 71.
The presser body 91 is formed so that the width in the short direction is about half of the width in the short direction of the base portion 71, and is disposed near the guide wall 74 of the base portion 71.

In the presser body 91, two concave portions 92 are formed so as to avoid the opening 73 of the base portion 71. An insertion recess 93 into which the guide wall 74 is inserted is formed on the bottom surface 92a of the recess 92 at the end on the base 71 side. A slit 94 is formed in the bottom surface 93 a of the insertion recess 93. Through this slit 94, the other end of the sensor wire (not shown) whose one end is connected to each of the

circuit boards

55A and 55B is drawn out radially inward.

In the presser body 91, three

presser plates

95 a, 95 b, and 95 c are extended outward in the radial direction at positions that avoid the concave portion 92 at the end opposite to the base portion 71 in the axial direction.
Each

presser plate

95a, 95b, 95c is located on the sensor line connection part 57 of each

circuit board

55A, 55B. In other words, the retaining

plates

95a, 95b, and 95c prevent the

circuit boards

55A and 55B from being detached from the sensor holder 70.

The presser main body 91 has two

engaging portions

96a and 96b projecting from the radially inner side surface. These engaging portions 96 are for engaging the sensor presser 90 with the outer frame member 20. The engaging portion 96 is integrally formed with a support portion 97 that protrudes radially inward from the presser body 91 and a claw portion 98 that extends from the radially inner end (tip) of the support portion 97 along the circumferential direction. It becomes.

The outer frame member 20 is formed to have an oval shape when viewed from the axial direction so as to correspond to the shape of the base portion 71 of the sensor holder 70, and is formed to be slightly curved along the outer periphery of the stator core 11. A cylindrical peripheral wall 23 is provided. More specifically, the peripheral wall 23 includes an outer peripheral wall portion 23a that constitutes a radially outer wall, an inner peripheral wall portion 23b that constitutes a radially inner wall, and the outer peripheral wall portion 23a and the inner peripheral wall portion 23b. The

side wall parts

23c and 23d to be connected are integrally formed.

Then, the base portion 71 of the sensor holder 70 is inserted into the peripheral wall 23. At this time, the peripheral wall 76 (inlay portion 76 a) of the base portion 71 is fitted into the peripheral wall 23 of the outer frame member 20.
On the inner peripheral surface of the peripheral wall 23, a plurality of positioning projections 21 projecting toward the inner peripheral side are formed at predetermined intervals in the peripheral direction of the peripheral wall 23. The positioning convex portion 21 has a role of positioning the sensor holder 70 with respect to the outer frame member 20. That is, when the base portion 71 is inserted into the outer frame member 20, the base portion 71 comes into contact with the positioning convex portion 21, and the position of the base portion 71 is determined.

On the inner peripheral surface of the peripheral wall 23, a plurality of retaining claws 22 projecting toward the inner peripheral side are formed between the positioning convex portions 21. The retaining claws 22 are for preventing the base portion 71 positioned on the outer frame member 20 from coming off from the outer frame member 20. Thereby, the outer frame member 20 and the sensor holder 70 are integrated.
On the outer peripheral wall portion 23a of the outer frame member 20, a thick plate-like tongue piece portion 64 is provided so as to protrude outward in the radial direction closer to the circumferential end than the substantially central portion in the circumferential direction. The tongue piece 64 is for fastening and fixing the position detection sensor 6 to an engine block (not shown). The tongue piece portion 64 is formed with a bolt insertion hole 64a through which a bolt (not shown) is inserted.

In the inner peripheral wall portion 23b of the outer frame member 20, engagement

concave portions

25a and 25b are formed at positions corresponding to the

engagement portions

96a and 96b of the sensor presser 90. The support portions 97 of the engaging

portions

96a and 96b are inserted into the engaging

concave portions

25a and 25b. Then, the inner peripheral wall portion 23b of the outer frame member 20 is sandwiched between the presser body 91 of the sensor presser 90 and the claw portions 98 of the engaging

portions

96a and 96b. Thereby, the sensor presser 90 is engaged with the outer frame member 20. A slit 24 a is formed in the bottom 24 of the engaging

recesses

25 a and 25 b of the outer frame member 20. The other end of the sensor wire (not shown) is drawn out radially inward of the outer frame member 20 through these slits 24a.

A wiring guide 68 extending inward in the radial direction is integrally formed at the center of the inner peripheral wall portion 23b. The wiring guide 68 is for collecting sensor wires (not shown) drawn from the outer frame member 20 and drawing them to the side.
The wiring guide 68 is formed by integrally molding a base portion 68a and a tongue piece portion 68b provided to be spaced apart from the base portion 68a in the axial direction. A sensor wire (not shown) is drawn and held between the base portion 68a and the tongue piece portion 68b.

A bolt seat 69 is formed integrally with the base portion 68a at the tip on the radially inner side.
The bolt seat 69 is for fixing the outer frame member 20 to the stator core 11. The bolt seat 69 includes a vertical wall portion 69a that bends and extends from the tip of the base portion 68a toward the inner side in the axial direction, and a horizontal wall portion 69b that bends and extends from the vertical wall portion 69a toward the inner side in the radial direction. Yes. The height of the vertical wall portion 69 a is set to a height at which the outer frame member 20 does not interfere with the inner peripheral wall 111 of the insulator 110 in a state where the bolt seat 69 is attached to the stator core 11.

A bolt insertion hole 67 is formed in the lateral wall portion 69 b of the bolt seat 69. Then, as shown in FIG. 1, the outer frame member 20 is fastened and fixed to the stator core 11 by inserting the bolt 30 from above the bolt seat 69 and screwing the bolt 30 into the stator core 11.
In addition, after the sensor holder 70, each

Hall IC

50a, 50b, 50c, and the sensor presser 90 are assembled | attached to the outer frame member 20, the inside of the surrounding wall 23 of the outer frame member 20 is sealed with a filler not shown. This prevents malfunction of the position detection sensor 6 caused by dust or water droplets.

(Details of action of position detection sensor and arrangement angle of each Hall IC)
Next, the operation of the position detection sensor 6 and details of the arrangement angles of the

Hall ICs

50a, 50b, and 50c will be described.
Of each of the

Hall ICs

50a, 50b, 50c, the second Hall IC 50b and the third Hall IC 50c are not shown as a rotational position signal of the rotor 5 with a signal detected at a position M2 (see FIG. 3) on the center side of the rotor 5. Output to the control unit. On the other hand, the first Hall IC 50a outputs a signal detected at a position M1 (see FIG. 3) on one end side in the axial direction of the rotor 5 to a control device (not shown) as an absolute position information signal on the circumference of the rotor 5.

A control device (not shown) receives the output signals of the second Hall IC 50b and the third Hall IC 50c, controls the commutation timing for the two-phase coil 7, and outputs the output signal of the first Hall IC 50a and the second Hall IC 50b. In response to the output signal of the third Hall IC 50c, the engine ignition timing and fuel injection timing are controlled.
When a current is supplied to the predetermined coil 7 based on the commutation timing for the coil 7, the rotor 5 and the crankshaft 4 rotate. As a result, the engine is started. After the engine is started, the generated power accompanying the rotation of the rotor 5 is charged into a battery (not shown) or directly used.

Here, B, L, M, N and X are natural numbers, the number of slots 15 is S, the number of magnets 9, that is, the number of magnetic poles is P,
X = 90 (2L−1) / {(360 / S) × (P / 2)} (1)
If the minimum value of L satisfying A is A1,
The number S of slots 15 of the rotating electrical machine 1, the number P of magnetic poles, and the electrical angle θ between the second Hall IC 50b and the third Hall IC 50c are:
S = 2N (2)
P = S ± 2 (3)
θ = 90 (2B1-1) (4)
B1 <A1 (5)
It is set to satisfy.

In the first embodiment, since the number S of the slots 15 is “12”, N = 2 is obtained by substituting “12” into the equation (2). In the first embodiment, since the number of magnetic poles P is 14, the formula (3) is satisfied.
Further, B1 is set to “1” as the number of B1s satisfying the expressions (1) and (5), and the electric angle θ is set to 90 ° by substituting this “1” into the expression (4). By setting the electrical angle θ in this way, the commutation timing for the two-phase coil 7 can be controlled by the second Hall IC 50b and the third Hall IC 50c. In the first embodiment, since the number P of the magnetic poles is 14, when the electrical angle θ = 90 ° is reduced to the mechanical angle θm, θm≈12.85 °.

In the first embodiment described above, the number S of slots 15 and the number of magnetic poles P of the rotating electrical machine 1 and the distance between the second Hall IC 50b and the third Hall IC 50c so as to satisfy the above formulas (1) to (5). The electrical angle θ is set. In addition, the first Hall IC 50a, the second Hall IC 50b, and the third Hall IC 50c are arranged at positions shifted from the circumferential center C1 of the slot 15. Furthermore, the two teeth 13 of the plurality of teeth 13 are designated as specific teeth 13A having notches 16 formed therein, and the first hole IC 50a and the second holes are inserted into the fitting grooves 17 of these specific teeth 13A. An IC 50b and a third Hall IC 50c are arranged. For this reason, even in the rotating electrical machine 1 in which the number of phases of the coil 7 is set to two phases, the mechanical angle θm between the second Hall IC 50b and the third Hall IC 50c can be set as small as possible. Therefore, each Hall IC 50a to 50c can be accommodated in one slot 15, and as a result, the sensor case 60 that accommodates each Hall IC 50a to 50c can be downsized. In addition, the manufacturing cost of the position detection sensor 6 can be reduced as much as the size can be reduced. Furthermore, since the Hall ICs 50a to 50c can be disposed opposite to the magnet 9 simply by forming the notches 16 in the two teeth 13, the deterioration of the characteristics of the teeth 13 (the rotating electrical machine 1) can be suppressed as much as possible. Can do.

Also, one of the plurality of magnets 9 is a two-pole magnet 9c including a main magnetic pole portion 119 and a sub magnetic pole portion 129, and a first Hall IC 50a facing the sub magnetic pole portion 129 is provided. Therefore, the ignition timing and fuel injection timing of the engine can be controlled by receiving the output signal of the first Hall IC 50a and the output signals of the second Hall IC 50b and the third Hall IC 50c by a control device (not shown). .

Further, the first Hall IC 50a is arranged so as to be aligned with the second Hall IC 50b in the axial direction, and the two

Hall ICs

50a and 50b are collectively mounted on the surface of one first circuit board 55A. For this reason, all three Hall ICs 50a to 50c can be arranged in one slot 15, and the position detection sensor 6 can be made compact while enabling control of commutation timing to the rotating electrical machine 1 and ignition timing to the engine. Can be

In the first embodiment described above, the first circuit board 55A on which the first Hall IC 50a and the second Hall IC 50b are surface-mounted and the second circuit board 55B on which the third Hall IC 50c is surface-mounted are separately provided. The case where the sensor case 60 is housed in the holder main body 72 has been described. However, the present invention is not limited to this, and the first circuit board 55A and the second circuit board 55B may be configured integrally.

In the first embodiment described above, the number S of slots 15 satisfying the above equations (1) to (5), the number P of magnetic poles, and the electrical angle θ between the second Hall IC 50b and the third Hall IC 50c are used. In the above description, the number S of slots 15 is set to “12”, the number of magnetic poles P is set to “14”, and the electrical angle θ is set to 90 °. However, the present invention is not limited to this, and can be arbitrarily set as long as the number S of slots 15, the number P of magnetic poles, and the electrical angle θ satisfying the above formulas (1) to (5).

For example, the electrical angle θ may be an angle satisfying the expressions (1) to (5). In some cases, the second Hall IC 50b and the third Hall IC 50c may not be disposed in one slot 15. However, even in such a case, at least one of the two

Hall ICs

50b and 50c is arranged at a position shifted from the circumferential center C1 of the slot 15, and the position corresponding to the two

Hall ICs

50b and 50c. By forming the notch portion 16 capable of receiving the

Hall ICs

50b and 50c in the tooth portion 13, the notch portion 16 can be suppressed to the minimum necessary size. For this reason, the characteristic deterioration of the rotary electric machine 1 can be suppressed.

(Second Embodiment)
Next, a second embodiment of the present invention will be described based on FIG. In addition, the same code | symbol is attached | subjected and demonstrated to the same aspect as 1st Embodiment.
FIG. 6 is a schematic configuration diagram of the stator 203 and the rotor 205 constituting the rotary electric machine 201 in the second embodiment when viewed from the axial direction, and corresponds to FIG. 2 described above.
As shown in the figure, the rotating electrical machine 1 of the first embodiment described above is a two-phase brushless type rotating electrical machine, whereas the rotating electrical machine 201 of the second embodiment is a three-phase brushless type rotating electrical machine. is there. This is the difference between the first embodiment and the second embodiment.

(Rotating electric machine)
More specifically, a plurality (14 in the second embodiment) of magnets 9 are arranged at equal intervals in the circumferential direction on the rotor yoke 208 constituting the rotor 205 of the rotating electrical machine 201.
The plurality of magnets 9 includes an N-pole magnet 9a in which the entire inner surface is magnetized to the N pole, an S-pole magnet 9b in which the entire inner surface is magnetized to the S pole, and the main magnetic pole portion 119 and the sub magnetic pole portion 129. Are constituted by one two-pole magnet 9c.

A two-pole magnet 9c is disposed between a specific pair of adjacent S-pole magnets 9b, and an N-pole magnet 9a is disposed between other adjacent S-pole magnets 9b. Therefore, the N pole and the S pole appear alternately on the inner peripheral side of the rotor 205 except at one end side in the axial direction. On the other hand, on one end side in the axial direction, N poles appear continuously by the sub-magnetic pole portion 129 of the two-pole magnet 9c and three magnets before and after (the front and rear in the circumferential direction).
The stator iron core 211 of the stator 203 has a plurality (12 pieces in the second embodiment) of teeth portions 213. A slot 215 is formed between adjacent teeth portions 213.

Here, in the rotating electrical machine 201, when n is a natural number of 3 or more, the number S of slots 15 and the number P of magnetic poles are:
When n is an odd number
P: S = 3n ± 1: 3n (11)
Set to meet
When n is an even number
P: S = 3n ± 2: 3n (12)
It is set to satisfy.
In the phase rotating electrical machine 201 of the second embodiment, since the number S of slots 15 is “12” and the number of magnetic poles P is “14”, the equation (12) is satisfied when n = 4 (even).

Each tooth part 213 is assigned to three phases (U phase, V phase, W phase).
And let T be the number of teeth 213,
[Condition 1] When n is an even number, m is a natural number of 1 or more, and when the number T of the teeth portions 213 and the number of magnetic poles P are both m times, three phases (U phase, V phase, W phase) Among them, n / 2 in-phase teeth portions 213 are arranged adjacent to each other in the circumferential direction so as to form 2 m in-

phase teeth groups

286U, 286V, and 286W. The in-phase in-

phase tooth groups

286U, 286V, and 286W are arranged to face each other about the rotation axis of the rotor 205.
More preferably,
[Condition 2] When n is an odd number, teeth portions 213 of three phases (U-phase, V-phase, W-phase) are all adjacently arranged (aligned) in the circumferential direction. The

In this embodiment, n = 4. That is, the teeth portion 213 is assigned in the order of the U phase, U phase, V phase, V phase, W phase, W phase, U phase, U phase, V phase, V phase, W phase, and W phase in the circumferential direction. Yes.
A position detection sensor 206 that detects the rotational position of the rotor 205 is provided on one end side in the axial direction of the stator core 211.

FIG. 7 is a development view of the inner peripheral surface side of the rotor yoke 208 and corresponds to FIG. 3 described above.
As shown in the figure, the position detection sensor 206 has four Hall ICs 250a to 250d (first Hall IC 250a, second Hall IC 250b, third Hall IC 250c, and fourth Hall IC 250d). The first Hall IC 250a and the second Hall IC 250b are surface-mounted on a circuit board (not shown) so as to be aligned in the axial direction.

The first Hall IC 250a is disposed at a position M1 facing the one end side in the axial direction on the inner circumferential surface of the rotor yoke 208.
The second Hall IC 250b, the third Hall IC 250c, and the fourth Hall IC 250d are disposed at a position M2 facing the substantially center in the axial direction on the inner peripheral surface of the rotor yoke 208. In other words, the second Hall IC 250b, the third Hall IC 250c, and the fourth Hall IC 250d are arranged on the same line in the rotation direction (circumferential direction) of the rotor 5.

Thus, the first Hall IC 250a detects the switching of the magnetic flux of each of the

pole magnets

9a, 9b, 9c at a height that passes through the auxiliary magnetic pole portion 129 of the dipole magnet 9c. On the other hand, the second Hall IC 250b, the third Hall IC 250c, and the fourth Hall IC 250d detect the switching of the magnetic flux of each

pole magnet

9a, 9b, 9c at a height that passes through the main magnetic pole portion 119 of the two-pole magnet 9c.
The second Hall IC 250b, the third Hall IC 250c, and the fourth Hall IC 250d output a signal detected at the position M2 on the center side of the rotor 205 to a control device (not shown) as a rotation position signal of the rotor 205. On the other hand, the first Hall IC 250a outputs a signal detected at the position M1 on one end side in the axial direction of the rotor 205 to a control device (not shown) as an absolute position information signal on the circumference of the rotor 205.

Here, B, C, M, N and X are natural numbers, the number of slots 215 is S, the number of magnetic poles is P,
X = 120 M / {(360 / S) × (P / 2)} (13)
If the minimum value of M satisfying A is A2,
The number S of slots 15 of the rotating electrical machine 1, the number of magnetic poles P, the electrical angle θ1 between the second Hall IC 250b and the third Hall IC 250c, and the electrical angle θ2 between the third Hall IC 250c and the fourth Hall IC 250d are:
S = 3N (14)
When S is an even number, P = S ± 2 (15)
When S is an odd number, P = S ± 1 (16)
θ1 = 120 + 360 (B2-1) (17)
θ2 = 120 + 360 (C−1) (18)
θ1 + θ2 <240A2 (19)
It is set to satisfy.

In the second embodiment, since the number S of the slots 15 is “12”, N = 2 when this “12” is substituted into the equation (14). In the second embodiment, since the number S of slots 15 is an even number and the number of magnetic poles P is 14, the equation (15) is satisfied.
Further, B2 is set to “1” as the number of B2 satisfying Expressions (13) and (19), and this “1” is substituted into Expression (17), and further, Expressions (18) and (19) are satisfied. Is set to θ2 and C. Here, C is set to “1”, and the electrical angles θ1 and θ2 are each set to 120 °. By setting the electrical angles θ1 and θ2 in this way, the commutation timing for the three-phase coil 7 can be controlled by the second Hall IC 250b, the third Hall IC 250c, and the fourth Hall IC 250d. Here, in the second embodiment, since the number P of the magnetic poles is 14, when the electrical angle θ1 = θ2 = 120 ° is redrawn to the mechanical angles θ1m and θ2m, θ1m = θ2m≈17.14 °.

The Hall ICs 250a to 250d are arranged at positions shifted from the circumferential center C2 of the slot 15, respectively.
Of the plurality of teeth 213, the teeth 213 corresponding to the respective Hall ICs 250a to 250d are respectively formed with notches 16 (see FIG. 4 described above, not shown in FIG. 6 of the second embodiment). Yes. The Hall ICs 250a to 250d are arranged in the notch 16 respectively.
Therefore, according to the second embodiment described above, the same effects as those of the first embodiment described above can be obtained.

In the second embodiment described above, the number S of slots 215 satisfying the above equations (13) to (19), the number of magnetic poles P, the electrical angle θ1 between the second Hall IC 250b and the third Hall IC 250c, and As an electrical angle θ2 between the third Hall IC 250c and the fourth Hall IC 250d, the case where the number S of slots 215 is set to “12”, the number of magnetic poles P is set to “14”, and the electrical angles θ1 and θ2 are set to 120 ° is described. did. However, the present invention is not limited to this, and can be arbitrarily set as long as the number S of slots 215, the number P of magnetic poles, and the electrical angles θ1 and θ2 satisfying the above equations (13) to (19). .

The present invention is not limited to the above-described embodiment, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention.
For example, in the above-described embodiment, the case where the rotating electrical machines 1 and 201 are used as a starter generator for a vehicle engine such as a motorcycle has been described. However, the present invention is not limited to this, and the rotating electrical machines 1 and 201 can be applied to various uses. For example, the rotary electric machines 1 and 201 can be used simply as a generator or simply as an electric motor.

In the above-described embodiment, the plurality of magnets 9 provided in the rotor yokes 8 and 208 are the N-pole magnet 9a in which the entire inner surface is magnetized to the N pole, and the entire inner surface is magnetized to the S pole. The case has been described in which the pole magnet 9b and one two-pole magnet 9c including the main magnetic pole portion 119 and the sub magnetic pole portion 129 are configured. The dipole magnet 9c has a case where a short sub magnetic pole portion 129 whose inner side surface is magnetized to the N pole is provided on one end side of the main magnetic pole portion 119 whose inner side surface is magnetized to the S pole. explained. However, the magnetization of the magnet 9 may be reversed between the N pole and the S pole. That is, in the two-pole magnet 9c, the main magnetic pole portion 119 may be magnetized to the N pole, and the sub magnetic pole portion 129 may be magnetized to the S pole.

DESCRIPTION OF SYMBOLS 1,201 ... Rotary electric machine 3,203 ... Stator 5,205 ... Rotor 6,206 ... Position detection sensor 7 ... Coil 9 ... Magnet 9a ... N pole magnet 9b ... S pole magnet 9c ... Two

pole magnets

11, 211 ... Stator iron core 13,213 ... Teeth part (teeth)
15, 215 ... Slot 16 ... Notch (recess)
17 ... Fitting groove (recess)
50a ... 1st Hall IC (3rd magnetic sensor)
50b, 250b ... 2nd Hall IC (1st magnetic sensor)
50c, 250c ... 3rd Hall IC (2nd magnetic sensor)
60 ... Sensor case 119 ... Main magnetic pole part 129 ... Sub magnetic pole part 250a ... 1st Hall IC (4th magnetic sensor)
250d ... 4th Hall IC (3rd magnetic sensor)
θ, θ1, θ2 ... electrical angle

Claims

A stator in which a plurality of teeth are arranged side by side in the circumferential direction and a slot is formed between the adjacent teeth;
A coil wound around the plurality of teeth and having a number of phases set to two phases;
A rotor having a plurality of magnets provided so as to be rotatable with respect to the stator and arranged so that magnetic poles are alternately arranged along a circumferential direction;
A first magnetic sensor and a second magnetic sensor which are arranged in any of the plurality of slots and detect the magnetic flux of the magnet;
With
B, L, M, N and X are natural numbers, the number of slots is S, the number of magnetic poles of the magnet is P,
X = 90 (2L−1) / {(360 / S) × (P / 2)}
If the minimum value of A satisfying L is A,
The number S of slots, the number P of magnetic poles, and the electrical angle θ between the first magnetic sensor and the second magnetic sensor are:
S = 2N
P = S ± 2
θ = 90 (2B-1)
B <A
Is set to meet
At least one of the first magnetic sensor and the second magnetic sensor is disposed at a position shifted from a circumferential center of the slot;
A rotating electrical machine in which at least one of the teeth is formed with a recess capable of receiving at least one of the first magnetic sensor and the second magnetic sensor.
The rotating electrical machine according to claim 1, wherein the first magnetic sensor and the second magnetic sensor are arranged in one of the slots, and the recess is formed in two teeth forming the slot.
A third magnetic sensor for detecting the magnetic flux of the magnet;
One of the plurality of magnets is
A main magnetic pole portion having a different polarity from the magnetic pole of the adjacent magnet;
A sub magnetic pole part having the same polarity as the magnetic pole of the adjacent magnet,
Have
The main magnetic pole part and the sub magnetic pole part are arranged adjacent to each other in the rotation axis direction of the rotor,
The first magnetic sensor and the second magnetic sensor are arranged at a position corresponding to the main magnetic pole part, and the third magnetic sensor is arranged at a position corresponding to the sub magnetic pole part. The rotating electrical machine according to claim 1 or 2.
The rotating electrical machine according to claim 3, wherein the third magnetic sensor is disposed in the same slot as the slot in which the first magnetic sensor and the second magnetic sensor are disposed.
A stator in which a plurality of teeth are arranged side by side in the circumferential direction and a slot is formed between the adjacent teeth;
A coil wound around the plurality of teeth and having a number of phases set to three phases;
A rotor having a plurality of magnets provided so as to be rotatable with respect to the stator and arranged so that magnetic poles are alternately arranged along a circumferential direction;
A first magnetic sensor, a second magnetic sensor and a third magnetic sensor which are arranged in any of the plurality of slots and detect magnetic flux of the magnet;
With
At least two adjacent teeth are set as in-phase teeth,
B, C, M, N and X are natural numbers, the number of slots is S, the number of magnetic poles of the magnet is P,
X = 120 M / {(360 / S) × (P / 2)}
If the minimum value of A satisfying M is A,
The number of slots S, the number of magnetic poles P, the electrical angle θ1 between the first magnetic sensor and the second magnetic sensor, and the electrical angle θ2 between the second magnetic sensor and the third magnetic sensor are: ,
S = 3N
When S is an even number, P = S ± 2
When S is an odd number, P = S ± 1
θ1 = 120 + 360 (B−1)
θ2 = 120 + 360 (C−1)
θ1 + θ2 <240A
Is set to meet
At least one of the first magnetic sensor, the second magnetic sensor, and the third magnetic sensor is disposed at a position shifted from a circumferential center of the slot;
A rotating electrical machine in which a recess capable of receiving any of the first magnetic sensor, the second magnetic sensor, and the third magnetic sensor is formed in at least one of the teeth.
Of the first magnetic sensor, the second magnetic sensor, and the third magnetic sensor, at least two magnetic sensors are disposed in one of the slots, and the recesses are formed in the two teeth forming the slot. The rotating electrical machine according to claim 5, wherein:
A fourth magnetic sensor for detecting the magnetic flux of the magnet;
One of the plurality of magnets is
A main magnetic pole portion having a different polarity from the magnetic pole of the adjacent magnet;
A sub magnetic pole part having the same polarity as the magnetic pole of the adjacent magnet,
Have
The main magnetic pole part and the sub magnetic pole part are arranged adjacent to each other in the rotation axis direction of the rotor,
The first magnetic sensor, the second magnetic sensor, and the third magnetic sensor are disposed at a position corresponding to the main magnetic pole portion, and the fourth magnetic sensor is disposed at a position corresponding to the sub magnetic pole portion. The rotating electrical machine according to claim 5 or 6, wherein the rotating electrical machine is arranged.
The rotation according to claim 7, wherein the fourth magnetic sensor is disposed in the same slot as the slot in which any one of the first magnetic sensor, the second magnetic sensor, and the third magnetic sensor is disposed. Electric.