JP4249077B2 - Claw pole type motor stator and claw pole type motor stator manufacturing method - Google Patents

Description

  The present invention relates to a claw pole motor stator and a method of manufacturing a claw pole motor stator.

2. Description of the Related Art Conventionally, for example, a plurality of unit stators corresponding to each phase are provided so as to constitute independent magnetic paths for each phase of a plurality of phases such as U phase, V phase, and W phase, and each unit stator has an annular winding. The yoke is provided with an outer peripheral portion connected so as to surround the periphery of the wire and an inner peripheral portion opened, and the inner peripheral portion of the yoke is bent from both open ends along the axial direction toward each open end. A pair of claw-shaped induction poles extending in parallel with each other so as to mesh with each other at predetermined intervals in the circumferential direction, and the claw poles arranged so that these claw-shaped induction poles face the outer peripheral portion of the rotor A type motor is known (see, for example, Patent Document 1).
JP-A-7-227075

By the way, in the claw pole type motor according to the above-described prior art, since the unit stators of a plurality of phases are stacked in the axial direction, there arises a problem that the dimension in the axial direction of the claw pole type motor is excessively increased. .
On the other hand, a plurality of stator rings are arranged so as to be stacked along the axial direction, annular windings are arranged in annular winding mounting holes formed between adjacent stator rings in the axial direction, The stator ring of the phase has claw-like induction poles protruding radially inward (or radially outward), and the claw-like induction poles of each phase are sequentially arranged along the circumferential direction and the outer peripheral surface of the rotor (or By facing the inner circumferential surface of the rotor, the magnetic path of each phase can be shared without changing the flux linkage of each phase, and an increase in the axial dimension of the claw pole motor can be suppressed. .
And it is desired to set appropriately the shape of the stator of such a claw pole type motor.
The present invention has been made in view of the above circumstances, and provides a claw pole motor stator and a claw pole motor stator manufacturing method capable of ensuring desired performance with an appropriate shape. Objective.

In order to solve the above problems and achieve the object, a stator of a claw pole type motor according to a first aspect of the present invention includes a multi-phase stator ring (for example, each stator ring 21 in the embodiment, 22 and 23) are arranged so as to be coaxially stacked along the axial direction, and an annular winding mounting portion (for example, each winding mounting portion in the embodiment) formed between the stator rings adjacent in the axial direction. 61, 62), an annular winding that generates a rotating magnetic field that rotates a rotor (for example, the rotor 11 in the embodiment) having a permanent magnet (for example, the permanent magnet 11a in the embodiment) (for example, The windings 24, 25A, 25B, 26) in the embodiment are arranged, and claw-shaped induction poles projecting radially from the stator ring main body of each phase (for example, the claw-shaped induction poles 32 in the embodiment, 42, 52) , An oppositely disposed so claw pole type motor stator comprising the permanent magnet as well as arranged along the sequentially circumferential direction each phase of the claw-like induction electrode, wherein the stator ring is circular of the stator ring body And the claw-shaped induction pole projecting radially from the stator ring body, the winding mounting portion is provided in the stator ring body, and the annular winding is covered by the stator ring body in the axial direction. The claw-shaped induction pole is mounted on the winding attachment portion as described above, and the induction pole body (for example, each induction pole body 32a, 42a, 52a in the embodiment) and the extension portion (for example, the embodiment) each extension 32b at, 42b, 42c, 52 b) and wherein the inductive pole opposed surface body facing the permanent magnet (e.g., the opposing surfaces 32B in the embodiment, 42B, Comprising a 2B), the extended portion is connected to the inner peripheral surface of the projecting the stator ring body from the side along the circumferential direction of the induction electrode body, wherein the phase on the facing surface of the induction electrode body dielectric electrode Compared to the area (for example, area C in the embodiment) of the magnetic flux passage area (for example, the passage area surface 81 in the embodiment) through which the effective magnetic flux passes, the induction pole is an area where the main body overlaps. It is characterized in that the area (for example, the area SA in the embodiment) of the magnetic flux passage region surface (for example, the inner region surface 82 in the embodiment) inside the main body is set larger.

  According to the above-mentioned claw pole type motor stator, the induction pole body until the magnetic flux that has passed through the magnetic flux passage region on the opposing surface of the induction pole body flows out from the induction pole body to the stator ring body and the extension portion. Can be effectively used for the field magnetic flux between the permanent magnet of the rotor and the claw-shaped induction pole of the stator, thereby improving the operating efficiency of the claw pole type motor. be able to.

Furthermore, the claw pole type motor stator of the present invention according to claim 2, wherein the induction electrode phases of the on the facing surface of the body a dielectric pole body is a region which overlaps the effective magnetic flux passes Compared with the area (for example, area C in the embodiment) of the magnetic flux passage region (for example, the passage region surface 81 in the embodiment), it flows out from the inside of the induction pole body to the extension portion and the stator ring body. Area (for example, the contact surfaces 80 and 80 and the base end surface 32F in the embodiment) of the induction pole main body, the extension portion, and the stator ring main body, which is a surface area of the magnetic flux passing through Each area BS and area A) in the embodiment is set to be larger.

  According to the above claw pole motor stator, the magnetic flux that has passed through the magnetic flux passage region on the opposing surface of the induction pole body is reduced until it flows out of the induction pole body to the stator ring body and the extension part. And the field magnetic flux between the permanent magnet of the rotor and the claw-shaped induction pole of the stator can be used effectively, and the operating efficiency of the claw pole motor can be improved.

Furthermore, the claw pole type motor stator of the present invention according to claim 3, wherein the induction electrode phases of the on the facing surface of the body a dielectric pole body is a region which overlaps the effective magnetic flux passes Compared with the area (for example, area C in the embodiment) of the magnetic flux passage area (for example, the passage area surface 81 in the embodiment), the magnetic flux flowing out from the inside of the induction pole body to the stator ring body and the The induction pole body which is a passage area surface of the magnetic flux flowing out from the inside of the extension part to the stator ring body and the contact surface between the extension part and the stator ring body (for example, the base end face 32F in the embodiment and each The area (for example, the area A and each area A in the embodiment) of the bottom surfaces 32E and 32E) is set larger.

  According to the claw pole motor stator described above, the magnetic flux that has passed through the magnetic flux passage region on the opposing surface of the induction pole body is reduced until it flows out from the induction pole body and the extension portion to the stator ring body. And the field magnetic flux between the permanent magnet of the rotor and the claw-shaped induction pole of the stator can be used effectively, and the operating efficiency of the claw pole motor can be improved.

  Furthermore, the stator of the claw pole type motor of the present invention according to claim 4 is characterized in that the stator ring body includes a winding portion (for example, a winding portion in the embodiment) to which the annular winding is mounted. And a back yoke (for example, each back yoke 31, 41, 51 in the embodiment) that connects the stator rings adjacent in the axial direction, and the stator is disposed to face the outer peripheral portion of the rotor. The ratio of the inner diameter of the stator (for example, the diameter D in the embodiment) to the inner diameter of the back yoke (for example, the back yoke inner diameter Db in the embodiment), and the stator of the rotor Ratio of the outer diameter of the back yoke (for example, the back yoke outer diameter Db in the embodiment) to the outer diameter of the stator (for example, the diameter D in the embodiment) when opposed to the inner peripheral portion (For example, implementation The ratio r) and in the form, the predetermined value (for example, are characterized by being set to a ratio lower limit value of r) In the above embodiment.

  According to the above claw pole motor stator, the ratio is set to a value equal to or higher than a predetermined value (for example, the lower limit value of the value that minimizes the total conduction loss per unit current of the claw pole motor). The operating efficiency of the claw pole type motor can be improved.

  Furthermore, the stator of the claw pole type motor of the present invention according to claim 5 is an inner diameter of the stator (for example, in the embodiment) when the stator is disposed opposite to the outer peripheral portion of the rotor. In a state where the diameter D) and the outer diameter of the stator (for example, the diameter D in the embodiment) when the stator is disposed opposite to the inner peripheral portion of the rotor are set to appropriate values, A distance (for example, nail height H in the embodiment) from the proximal end to the distal end of the induction pole body along the radial direction is set to a predetermined value (for example, Formula (29) or Formula (46) in the embodiment). It is characterized in that it is set to be equal to or more than the lower limit value.

  According to the above claw pole motor stator, the distance from the base end to the tip end of the induction pole body along the radial direction is set to a predetermined value (for example, the total conduction loss per unit current of the claw pole motor is minimized). By setting the value to a value greater than or equal to the lower limit value of the value to be performed, the operating efficiency of the claw pole motor can be improved.

According to a sixth aspect of the present invention, there is provided a method of manufacturing a stator for a claw pole motor according to the present invention, wherein a plurality of stator rings (for example, the stator rings 21, 22, and 23 in the embodiment) are arranged along the axial direction. Are arranged so as to be coaxially stacked, and a permanent magnet (for example, each of the winding mounting portions 61 and 62 in the embodiment) formed between the stator rings adjacent in the axial direction. For example, an annular winding (for example, each winding 24 in the embodiment, for generating a rotating magnetic field that rotates a rotor (for example, the rotor 11 in the embodiment) having the permanent magnet 11a) in the embodiment. 25A, 25B, 26), and claw-like induction poles (for example, claw-like induction poles 32, 42, 52 in the embodiment) protruding radially from the stator ring main body of each phase. The nail-shaped induction poles in order A the method for producing oppositely disposed so claw pole type motor stator comprising a permanent magnet as well as arranged along the circumferential direction, said stator ring, said stator ring body annular diameter from the stator ring body The claw-shaped induction pole protruding in the direction, the winding mounting portion is provided in the stator ring body, and the annular winding is covered by the stator ring body in the axial direction. The claw-like induction poles are mounted on the induction pole body (for example, each induction pole body 32a, 42a, 52a in the embodiment) and an extension part (for example, each extension part 32b, 42b in the embodiment). , 42c, 52 b) and wherein the induction electrode body comprises a facing surface that faces the permanent magnet (e.g., the opposing surfaces 32B in the embodiment, 42B, 52B), prior to Extension is connected to the inner peripheral surface of the projecting the stator ring body from the side along the circumferential direction of the induction electrode body, the stator ring body, the winding section annular windings are mounted (e.g., the embodiment Winding portion in the form) and a back yoke that connects the stator rings adjacent in the axial direction, and based on the diameter of the back yoke, the volume of the claw pole type motor (for example, in the embodiment) Based on the volume calculation step (for example, Equation (16) in the embodiment) for calculating the volume Vb) and the volume calculated in the volume calculation step, a torque constant (for example, in the embodiment) Torque constant calculating step (for example, Equations (17) and (41) in the embodiment) for calculating a torque constant ktv per unit volume, and a thickness of the winding portion along the axial direction (example) For example, based on the thickness Tc _i in the embodiment and the area of the cross section of the winding portion in the radial direction (for example, the cross-sectional area S _{i in} the embodiment), the total conduction loss per unit current ( For example, the total conduction loss calculation step for calculating the total conduction loss P per unit current in the embodiment (for example, Expression (20), Expression (27), Expression (43), Expression (47) in the embodiment) )) And the distance from the proximal end to the distal end of the induction pole body along the radial direction that minimizes the total conduction loss calculated in the total conduction loss calculation step (for example, the nail height in the embodiment) (H) is calculated (for example, Formula (21) to Formula (29), Formula (44) to Formula (46), Formula (51) in the embodiment)).

  According to the claw pole motor stator manufacturing method described above, the distance from the base end to the tip end of the induction pole body along the radial direction is minimized, and the total conduction loss per unit current of the claw pole motor is minimized. By setting the value to be equal to or greater than the lower limit value, the operation efficiency of the claw pole type motor can be improved.

According to the stator of the claw pole type motor of the present invention, the field magnetic flux between the permanent magnet of the rotor and the claw-shaped induction pole of the stator can be used effectively, and the operating efficiency of the claw pole type motor can be improved. Can be improved.
Furthermore, according to the stator of the claw pole type motor of the present invention described in claim 4 or claim 5, the conduction loss during energization can be reduced, and the operating efficiency of the claw pole type motor can be improved. it can.

  In addition, according to the method of manufacturing a claw pole motor stator of the present invention described in claim 6, it is possible to reduce the total conduction loss per unit current and improve the operation efficiency of the claw pole motor.

DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a claw pole motor stator and a claw pole motor stator manufacturing method according to the present invention will be described with reference to the accompanying drawings.
The claw pole type motor 10 according to the present embodiment is mounted on a hybrid vehicle as a vehicle drive source together with the internal combustion engine E, for example, and the internal combustion engine E, the claw pole type motor 10 and the transmission T / M are directly connected in series. In the parallel hybrid vehicle having the structure, at least the driving force of either the internal combustion engine E or the claw pole type motor 10 is transmitted to the driving wheels W, W of the vehicle via the transmission T / M.
When the driving force is transmitted to the claw pole type motor 10 from the driving wheels W, W when the vehicle is decelerated, the claw pole type motor 10 functions as a generator to generate a so-called regenerative braking force and the movement of the vehicle body. Energy is recovered as electric energy (regenerative energy). Further, even when the output of the internal combustion engine E is transmitted to the claw pole type motor 10, the claw pole type motor 10 functions as a generator and generates power generation energy.

As shown in FIG. 1, for example, the claw pole motor 10 includes a rotor 11 having a plurality of permanent magnets 11a,..., 11a and a plurality of phases (for example, U U) that generate a rotating magnetic field that rotates the rotor 11. The rotor 11 has one end of the rotating shaft connected to the crankshaft of the internal combustion engine and the other end connected to the input shaft of the transmission.
In this rotor 11, a plurality of substantially rectangular plate-like permanent magnets 11a, ..., 11a are arranged on the outer peripheral portion of the rotor 11 at a predetermined interval in the circumferential direction, and each permanent magnet 11a is in the thickness direction (that is, rotated). The permanent magnets 11a and 11a that are magnetized in the radial direction of the child 11 and are adjacent in the circumferential direction have different magnetization directions, that is, the permanent magnet 11a whose outer peripheral side is the N pole, the outer peripheral side is the S pole. The permanent magnets 11a are arranged so as to be adjacent in the circumferential direction.
Further, the outer peripheral surface of each permanent magnet 11 a is exposed toward the inner peripheral surface of the substantially cylindrical stator 12 that is disposed opposite to the outer peripheral portion of the rotor 11.

  As shown in FIGS. 1 and 2, for example, the stator 12 includes a U-phase stator ring 21, a V-phase stator ring 22, a W-phase stator ring 23, a U-phase winding 24, and a first V-phase winding 25A. And a second V-phase winding 25B and a W-phase winding 26, and the stator rings 21, 22, and 23 are formed integrally by, for example, pressure-molding a powdery magnetic material. The back yoke 31, 41, 51 and the claw-shaped induction poles 32, 42, 52 are provided.

For example, as shown in FIGS. 1 and 3, the U-phase stator ring 21 is formed from a substantially annular U-phase back yoke 31 and a position at a predetermined interval in the circumferential direction of the inner peripheral portion of the U-phase back yoke 31. A claw-shaped U-phase claw-shaped induction pole 32 that protrudes inward in the radial direction and extends so as to bend in one direction in the axis P direction as it goes from the proximal end side to the distal end side. Yes.
The U-phase back yoke 31 is formed so that the thickness along the axis P direction is reduced by one step at the inner peripheral portion on the end surface 31A in contact with one end surface 41A of the V-phase back yoke 41. An annular U-phase winding mounting portion 31a is formed along the circumferential direction coaxial with the axis P.
The U-phase claw-shaped induction pole 32 includes, for example, a U-phase induction pole body 32a having a substantially L-shaped cross-section with respect to the circumferential direction and a substantially rectangular cross-section with respect to the radial direction, and a U-phase induction pole body. The side surfaces 32A, 32A of the U-phase induction pole main body 32a and the side surfaces 32A, 32A of the U-phase induction pole body 32a protrude in the circumferential direction from both side surfaces 32A, 32A of the 32a and project radially inward from the inner peripheral surface 31B of the U-phase back yoke 31. The U-phase extending portion 32b is connected to the inner peripheral surface 31B of the U-phase back yoke 31 and has U-phase extending portions 32b and 32b formed in a tapered shape from the base end side toward the tip end side in the radial direction.

The U-phase induction pole body 32a is a pair of side surfaces 32A and 32A connected so as to intersect the U-phase facing surface 32B facing the outer peripheral surface of each permanent magnet 11a exposed on the outer peripheral surface of the rotor 11. And an end face 32C and an inclined face 32D that form a pair along the direction of the axis P. The inclined surface 32D is inclined with respect to the end surface 32C substantially orthogonal to the U-phase facing surface 32B so that the distance between them gradually increases inward in the radial direction.
For example, the U-phase extension portion 32b has a vertex 33 at a position near the inner peripheral side end of the intersecting ridge line portion between the side surface 32A and the end surface 32C of the U-phase induction pole body 32a, and the inner peripheral surface 31B of the U-phase back yoke 31. Is formed in a substantially quadrangular pyramid shape having a substantially rectangular bottom surface 32E having a predetermined circumferential length.
The bottom surface 32E of the U-phase extension 32b is, for example, a base that forms part of the inner peripheral surface 31B of the U-phase back yoke 31 that faces the U-phase facing surface 32B along the radial direction in the U-phase induction pole body 32a. It has the same circumferential length as the end face 32F, and the area of the bottom face 32E of the U-phase extension 32b and the base end face 32F of the U-phase induction pole body 32a is set to be equal.

For example, as shown in FIGS. 1 and 4, the V-phase stator ring 22 is formed from a substantially annular V-phase back yoke 41 and a position at a predetermined interval in the circumferential direction of the inner peripheral portion of the V-phase back yoke 41. It is configured to include a V-shaped claw-shaped induction pole 42 that protrudes inward in the radial direction and extends in one direction and the other in the direction of the axis P along the direction from the proximal end side to the distal end side.
The V-phase back yoke 41 is formed such that the thickness along the axis P direction is reduced by one step at the inner peripheral portion on one end surface 41A in contact with the end surface 31A of the U-phase back yoke 31. An annular first V-phase winding mounting portion 41a is formed along the circumferential direction coaxial with the axis P, and the inner circumferential portion on the other end surface 41B that abuts on the end surface 51A of the W-phase back yoke 51 has an axis P direction. An annular second V-phase winding mounting portion 41b that is coaxial with the axis P and formed so as to be thinner by one step is formed.
The V-phase claw-shaped induction electrode 42 includes, for example, a V-phase induction electrode body 42a having a substantially T-shaped cross section in the circumferential direction and a substantially rectangular cross-section shape in the radial direction, and a V-phase induction pole body. The side surfaces 42A, 42A of the V-phase induction pole main body 42a and the side surfaces 42A, 42A of the V-phase induction pole body 42a are projected in the circumferential direction from both side surfaces 42A, 42A of the 42a and radially inward from the inner circumferential surface 41C of the V-phase back yoke 41. A first V-phase expansion portion 42b and a second V-phase expansion portion 42c that are connected to the inner peripheral surface 41C of the V-phase back yoke 41 and are tapered radially inward from the proximal end side to the distal end side. It is configured.

The V-phase induction pole body 42a is a pair of side surfaces 42A and 42A connected so as to intersect the V-phase facing surface 42B facing the outer peripheral surface of each permanent magnet 11a exposed on the outer peripheral surface of the rotor 11. And one and the other inclined surfaces 42C and 42D which make a pair along the direction of the axis P. Both the inclined surfaces 42C and 42D are inclined so that the distance between them gradually increases inward in the radial direction.
For example, the first V-phase extended portion 42b has, as a vertex 43, a position in the vicinity of the inner peripheral side end portion of the intersecting ridge line portion between the one side surface 42A of the V-phase induction pole body 42a and the other inclined surface 42D. It is formed in a substantially quadrangular pyramid shape having a substantially rectangular bottom surface 42E having a predetermined circumferential length and forming a part of the inner peripheral surface 41C of 41.
For example, the second V-phase extended portion 42c has a vertex 44 at a position in the vicinity of the inner peripheral end of the intersecting ridge line portion between the other side surface 42A of the V-phase induction pole main body 42a and the one inclined surface 42C. It is formed in a substantially quadrangular pyramid shape having a substantially rectangular bottom surface 42F having a predetermined circumferential length and forming a part of the inner peripheral surface 41C of 41.
The bottom surfaces 42E and 42F of the V-phase extension portions 42b and 42c are, for example, the inner peripheral surface 41CB of the V-phase back yoke 41 that faces the V-phase facing surface 42B along the radial direction in the V-phase induction pole body 42a. It has a length in the circumferential direction equivalent to a part of the base end face 42G, and the areas of the bottom faces 42E and 42F of the V-phase extension portions 42b and 42c and the base end face 42G of the V-phase induction pole body 42a are set to be equal. ing.

For example, as shown in FIGS. 1 and 5, the W-phase stator ring 23 has a shape equivalent to that of the U-phase stator ring 21, and a substantially annular W-phase back yoke 51, A claw-like W that protrudes inward in the radial direction from a position at a predetermined interval in the circumferential direction of the peripheral portion and extends so as to bend in the other direction in the axis P direction from the proximal end side toward the distal end side. A phase claw-like induction pole 52 is provided.
The W-phase back yoke 51 is formed such that the thickness along the axis P direction is reduced by one step at the inner peripheral portion on the end surface 51A in contact with the other end surface 41B of the V-phase back yoke 41. An annular W-phase winding mounting portion 51a is formed along the circumferential direction coaxial with the axis P.
The W-phase claw-shaped induction electrode 52 includes, for example, a W-phase induction electrode body 52a having a substantially L-shaped cross-section with respect to the circumferential direction and a substantially rectangular cross-section with respect to the radial direction, and a W-phase induction electrode body. The side surfaces 52A, 52A of the W-phase induction pole body 52a and the side surfaces 52A, 52A of the W-phase induction pole body 52a are projected in the circumferential direction from both side surfaces 52A, 52A of the 52a and radially inward from the inner circumferential surface 51B of the W-phase back yoke 51. W-phase extending portions 52b and 52b are connected to the inner peripheral surface 51B of the W-phase back yoke 51 and are tapered in a radially inward direction from the proximal end side toward the distal end side.

The W-phase induction pole body 52a is a pair of side surfaces 52A and 52A connected so as to intersect the W-phase facing surface 52B facing the outer peripheral surface of each permanent magnet 11a exposed on the outer peripheral surface of the rotor 11. And an end face 52C and an inclined face 52D that form a pair along the direction of the axis P. The inclined surface 52D is inclined with respect to the end surface 52C substantially orthogonal to the W-phase facing surface 52B so that the distance between them gradually increases inward in the radial direction.
For example, the W-phase extending portion 52b has an apex 53 at a position near the inner peripheral side end of the intersecting ridge line portion between the side surface 52A and the end surface 52C of the W-phase induction pole body 52a, and the inner peripheral surface 51B of the W-phase back yoke 51. Is formed in a substantially quadrangular pyramid shape having a substantially rectangular bottom surface 52E having a predetermined circumferential length.
The bottom surface 52E of the W-phase extension 52b is, for example, a base that forms part of the inner peripheral surface 51B of the W-phase back yoke 51 that faces the W-phase facing surface 52B along the radial direction in the W-phase induction pole body 52a. It has the same circumferential length as the end face 52F, and the area of the bottom face 52E of the W-phase extension 52b and the base end face 52F of the W-phase induction pole body 52a is set to be equal.

As shown in FIGS. 2 and 6, for example, the stator rings 21, 22, and 23 are connected so that the claw-shaped induction poles 32, 42, and 52 are sequentially arranged along the circumferential direction. The end surface 31A of the yoke 31 and one end surface 41A of the V-phase back yoke 41 are in contact with each other so that the U-phase winding mounting portion 31a on the end surface 31A and the first V-phase winding mounting portion 41a on the one end surface 41A. An annular first winding mounting portion 61 is formed, and the other end surface 41B of the V-phase back yoke 41 and the end surface 51A of the W-phase back yoke 51 come into contact with each other, so that the second V-phase winding on the other end surface 41B. An annular second winding mounting portion 62 is formed by the mounting portion 41b and the W-phase winding mounting portion 51a on the end surface 51A.
In the first winding mounting portion 61, the U-phase winding 24 is mounted at a position shifted toward the U-phase back yoke 31 along the axis P direction, and at a position shifted toward the V-phase back yoke 41. A first V-phase winding 25A is attached. Further, in the second winding mounting portion 62, the second V-phase winding 25B is mounted at a position shifted toward the V-phase back yoke 41 along the axis P direction, and a position shifted toward the W-phase back yoke 51 side. W-phase winding 26 is attached to the.

Each of the windings 24, 25A, 25B, and 26 is formed by winding a conductive rectangular wire having a substantially rectangular shape in cross section, for example, so as to form a plurality of layers in the radial direction and the circumferential direction. The second V-phase winding 25B mounted on the second winding mounting portion 62 so that the magnetomotive force directions of the U-phase winding 24 and the first V-phase winding 25A mounted on the second winding mounting portion 62 are opposite to each other. So that the directions of magnetomotive forces of the first and second V-phase windings 25A and 25B are opposite to each other. That is, the direction of the magnetomotive force of each of the windings 24, 25A, 25B, and 26 sequentially arranged along the axis P direction is set so as to be alternately reversed.
The windings 24, 25A, 25B, and 26 are connected by star connection or delta connection.

For example, as shown in FIG. 7 and FIG. 8, the U-phase induction pole body 32a of the U-phase claw-like induction pole 32 has a first V-phase extension 42b of the V-phase claw-like induction pole 42 along the axis P direction. The first V-phase extended portion 42b of the V-phase claw-shaped induction pole 42 is disposed opposite to the W-phase claw-shaped induction pole 42 along the axis P direction. And are arranged opposite to each other.
For example, as shown in FIGS. 7 and 9, the V-phase induction pole body 42 a of the V-phase claw-like induction pole 42 has a U between the U-phase claw-like induction poles 32 at a predetermined interval on both sides in the axis P direction. The phase expansion portion 32 b and the W phase expansion portion 52 b of the W phase claw-like induction electrode 52 are disposed to face each other.
For example, as shown in FIGS. 7 and 10, the W-phase induction pole body 52 a of the W-phase claw-like induction pole 52 has a second V-phase extension 42 c of the V-phase claw-like induction pole 42 along the axis P direction. The second V-phase extension 42c of the V-phase claw-shaped induction pole 42 is opposed to the U-phase extension 32b of the U-phase claw-shaped induction pole 32 along the axis P direction. And are arranged opposite to each other.

The claw pole type motor 10 according to the present embodiment has the above-described configuration. Next, a method for manufacturing the claw pole type motor 10, in particular, each of the stator rings 21, 22, and 23 constituting the stator 12. A method for setting the shape of the claw-shaped induction poles 32, 42, 52 will be described with reference to the accompanying drawings.
First, in the following, the U-phase claw-shaped induction pole 32 will be described, for example, as shown in FIG.
In the following description, the dimension of the U-phase facing surface 32B along the axis P direction or the axial length of the stator 12 is a claw length L, and the dimension of the proximal end surface 32F along the axis P direction is a thickness T. The distance from the proximal end to the distal end of the U-phase induction pole body 32a along the direction is the claw height H, the dimension of the U-phase facing surface 32B along the circumferential direction is the claw distal end width W, and the base along the circumferential direction is The dimension of the end face 32F is the claw base end width W _s and, further, for example, as shown in FIG. 12, the phase induction pole bodies 32a, 42a, and 52a overlap each other when viewed along the axis P direction. Te the length of the region where the effective magnetic flux passes has an effective length L _s.

[Requirements for nail height H and effective length L _s ]
In the following, for example, the diameter of the claw pole type motor 10 (for example, the diameter D, which is the inner diameter of the inner peripheral end of each phase induction pole body 32a, 42a, 52a) and the number of pole pairs P are set to predetermined values. The necessary conditions for the nail height H and the effective length L _s will be described.
A value n obtained by dividing the number of pole pairs P of the stator 12 and the number of claw-shaped induction poles 32, 42, 52 arranged along the circumferential direction by the number P of pole pairs (corresponding to the number of phases in concentrated winding). in wave winding or distributed winding the equivalent) to the number of phases × 2, based on the magnetic material ratio gf at the proximal end of each phase induction electrode body 32a, 42a, 52a, the claw tip width W and Tsumemoto end width W _s Further, the thickness T, the area A of the base end face 32F, and the area BS of the contact surface between the U-phase induction pole main body 32a and the U-phase extension 32b are described, for example, as shown in the following formula (1).
Note that, in this U-phase claw-like induction electrode 32, even if both sides 32A of the U-phase induction electrode body 32a, 32A is not perpendicular to the base end surface 32F, the claw tip width W and Tsumemoto end width W _s is fixed When it is sufficiently smaller than the diameter D, which is the inner diameter of the child 12, the radial dimension of the contact surface 80 between the U-phase induction pole body 32a and the U-phase extension 32b is approximated by the claw height H. Can do.

  For example, as shown in FIG. 13, if the thickness T is equal to each phase induction pole body 32 a, 42 a, 52 a, the V phase claw induction pole is similar to the U phase claw induction pole 32. 42, the area A of the base end face 42G, the area BS of each contact surface 80a, 80b between the V-phase induction pole body 42a and the first and second V-phase expansion portions 42b, 42c, and the base in the W-phase claw-like induction pole 52 The area A of the end face 52F and the area BS of the contact surface 80c between the W-phase induction pole body 52a and the W-phase expansion part 52b are described by the above formula (1).

Here, for example, as shown in FIG. 14, the magnetic flux that has passed through the effective magnetic flux passing region surface 81 (area C) on the U-phase facing surface 32B is first, for example, as shown in FIG. It passes through an internal region surface 82 (area SA) having a pair of opposite ridge line portions 82a between the U-phase facing surface 32B and the end surface 32C of 32a and a cross ridge line portion 82b between the inclined surface 32D and the base end surface 32F. . For this reason, the condition for all the magnetic fluxes that have passed through the passage region surface 81 (area C) to pass through the inner region surface 82 (area SA) is SA> C.
Here, when the thickness T is smaller than the claw height H, for example, as shown in FIG. 16, the area SA of the inner region surface 82 and the area SB of the end surface 32C of the U-phase induction pole body 32a are almost equal. Since it is equivalent (SA≈SB), the condition for all the magnetic fluxes that have passed through the passage area surface 81 (area C) to pass through the inner area surface 82 (area SA) is as shown in the following formula (2). Described in

  Next, the magnetic flux that has passed through the inner region surface 82 is, for example, as shown in FIG. 17, the contact surfaces 80 and 80 (each area BS) between the U-phase induction pole body 32a and the U-phase expansion portions 32b and 32b and the base. Since it passes through the end face 32F (area A), the condition shown in the following mathematical formula (3) is required.

  Further, the magnetic flux that has passed through the contact surfaces 80 and 80 (each area BS) passes through the bottom surfaces 32E and 32E (each area A) of the U-phase expansion portions 32b and 32b as shown in FIG. 18, for example. The condition shown in the following mathematical formula (4) is required.

  That is, the necessary condition for guiding the magnetic flux that has passed through the effective magnetic flux passing region surface 81 (area C) on the U-phase facing surface 32B to the U-phase back yoke 31 is described as shown in the following formula (5), for example. The

Here, for example, in order to increase the torque that can be generated when the diameter (for example, the diameter D) of the claw pole motor 10 is fixed, the amount of magnetic flux passing through the U-phase facing surface 32B may be increased. Therefore, based on the above formula (5), the effective length L _s is described as shown in the following formula (6), for example.

  Furthermore, in order to increase the torque that can be generated when the amount of magnetic flux passing through the U-phase facing surface 32B is fixed, the current value of the energization current may be increased. What is necessary is just to increase the area. Then, in order to increase the area of the U-phase winding 24, the thickness T may be decreased. Based on the above formula (5), for example, it is described as shown in the following formula (7) and formula (8). The larger one of the minimum values T1 and T2 of the thickness T may be selected.

  Here, as shown in FIG. 19, for example, the minimum value T1 changes in a decreasing trend as the number of pole pairs P increases, and the minimum value T2 does not depend on the change in the number of pole pairs P. For P, the minimum value T2 corresponding to the above equation (8) is selected.

[Optimum value of diameter D]
Hereinafter, the back yoke inner diameter (for example, the diameter of the outer end of the U-phase winding mounting portion 31a) Db related to the outer diameter of the claw pole motor 10 (that is, the outer diameter of the stator 12) is set to a predetermined value. A method for optimizing the diameter D in this state will be described.
For example, as shown in FIG. 20, the equation (6) is described as the following equation (9) by the ratio r (= D / Db) between the diameter D and the back yoke inner diameter Db.

Here, in the above formula (8), if the nail height H → 0, the thickness T → 1/3, and the number of phases of three or more phases, for example, as shown in FIG. The thickness of the winding portion (for example, in the U phase, the winding portion 83 to which the U phase winding 24 is mounted) (that is, the depth of the U phase winding mounting portion 31a) Tc ≦ 0.
Further, in the above formula (8), if the claw height H → (1-r) Db / 2, for example, as shown in FIG. ) (That is, the radial width of the U-phase winding mounting portion 31a) HL _s → 0.
That is, the optimum value of the nail height H exists when 0 <H <(1-r) Db / 2.

Here, since the effective length L _s changes according to the nail height H as shown in the above formula (6), first, in the following, for example, a torque constant per unit volume is fixed to a predetermined value. Then, the optimum value of the claw height H corresponding to the predetermined back yoke inner diameter Db and the ratio r is calculated.
Linkage interlinking with a winding having a number of turns n _t (for example, U-phase winding 24 in the U-phase) by the magnetic flux density B in the gap between the outer peripheral portion of the rotor 11 and the inner peripheral portion of the stator 12 The magnetic flux Φ is described, for example, as shown in the following formula (10).

Here, when an energization current having a predetermined DC value Ic is applied to the winding, the magnetic flux density in the air gap is changed from (−B) to (+ B) due to the energization electrical angle θc per electrical angle π = 180 deg. The voltage V generated in the winding when it changes with a change amount for a predetermined time to, for example, is described as shown in the following formula (11), for example, and the conduction current I and the linkage flux Φ are shown in FIG. Have a relationship. Note that ω _e is an electrical angular velocity, and ω _m is a mechanical angular velocity.

Since the time variation of the energizing current I and the magnetic flux density is constant, for example, as shown in FIG. 23, the electrical angle changes by π = 180 deg (that is, the period of t = π / ω _e ). range of suitable energizing electrical angle .theta.c (i.e., tc = θc / ω _e period) over, for example, predetermined power V · Ic is described as shown in the following equation (12) is generated.

  As a result, the average value of the electric power generated in all-phase windings (that is, all windings 24, 25A, 25B, and 26) is described, for example, as shown in the following formula (13).

Based on the torque Tr and the mechanical rotation angle ω _m , the torque constant kt is described as shown in the following formula (14). Further, the formula (14) is expressed by the above formula (9) as the following formula (15). Described as shown.

  Here, when the volume Vb of the claw pole type motor 10 up to the back yoke inner diameter Db is described as shown in the following formula (16), for example, the torque constant ktv per unit volume is shown as the following formula (17), for example. Described in

Here, if the gap between the claw-shaped induction poles 32, 42, 52 in the axial direction is ignored, i phase (i is an appropriate natural number, and in this claw pole type motor 10, 1 ≦ i ≦ n = 3) The thickness Tc _i and the cross-sectional area S _i of the winding part are described, for example, as shown in the following formula (18).
Incidentally, kc _i is a value corresponding to the ratio of the thickness of each of the winding phase portions (or cross-sectional area) is described, for example, as shown in the following equation (19).

Here, if the length of the winding portion is approximated to be equal to the back yoke circumference πDb, the resistance value R _i of the winding of each phase can be calculated based on the equation (18) and the conductivity ρ. Based on the resistance value R _i and the above equation (17), the total conduction loss P per unit current is described as shown in the following equation (20), for example.

That is, by calculating the claw height H that minimizes the total conduction loss P per unit current shown in the equation (20) with respect to the predetermined back yoke inner diameter Db and the ratio r, the claw height H is The torque constant ktv per unit volume can be obtained with the minimum conduction loss.
Here, as shown in FIG. 24 and the following mathematical formula (21), for example, the third term of the mathematical formula (20) is the first approximation for the nail height H, the total conduction loss P1 per unit current is Based on the formula (20), it is described as shown in the following formula (22).

In the above formula (22), the term related to the nail height H is only the function F1 (r, H). Therefore, the nail height H that maximizes the value of this function F1 (r, H) is the optimum nail. The height is H1opt.
Based on the partial differentiation of the function F1 (r, H) with respect to the nail height H, the optimum nail height H1opt is described, for example, as shown in the following equation (23).

  Further, the total term per unit current when the third term of the above formula (20) is approximated by the upper limit value (1-n · r / 3) as shown in FIG. 24 and the following formula (24), for example. The loss P2 is described as shown in the following formula (25) based on the formula (20).

In the above formula (22), the term related to the nail height H is only the function F2 (r, H). Therefore, the nail height H that maximizes the value of the function F2 (r, H) is the optimum nail. The height is H2opt.
Based on the partial differentiation of the function F2 (r, H) with respect to the nail height H, the optimum nail height H2opt is described, for example, as shown in the following equation (26).

Here, for example, the optimum claw heights H1opt and H2opt when the back yoke inner diameter Db is normalized to 1, the ratio r between the back yoke inner diameter Db and the diameter D increases as shown in FIG. 25, for example. It will change to a decreasing trend.
Then, as shown in the above formulas (23) and (26), the optimum claw heights H1opt and H2opt are proportional to the back yoke inner diameter Db when the ratio r is fixed to a predetermined value. If H = h · Db by the coefficient h, the total conduction loss P per unit current shown in the equation (20) is described as shown in the following equation (27), for example.
The proportionality coefficient h is described as shown in the following formula (28) based on the formula (23) and the formula (26).

That is, in the above equation (27), when the proportionality coefficient h is set to an appropriate value, the ratio r that maximizes the value of the function F3 (r) related to the ratio r is the unit regardless of the back yoke inner diameter Db. This value minimizes the total conduction loss P per current.
Here, the function F3 (r) when n = 3 in the equation (27) and the proportionality coefficient h is set according to the optimum nail heights H1opt and H2opt in the equation (23) and the equation (28). The values F3_1 (r) and F3_2 (r) are maximum at a ratio r = about 0.3, for example, as shown in FIG.

In addition, since the analysis process mentioned above does not consider the saturation by an inductance, it respond | corresponds to the case where the magnet magnetic flux is decreased and the winding magnetomotive force is increased compared with actual.
Therefore, in actuality, the torque that can be generated can be increased more by reducing the coil magnetomotive force than in the case of the optimum ratio r = 0.3, which is described above. The torque density can be improved by setting the height H to a value larger than the above-described lower limit values (that is, r = 0.3 and optimum nail heights H1opt, H2opt). Thereby, the ratio r and the nail height H are described as shown in the following formula (29).

That is, the diameter D can be optimized by setting the effective length L _s and the number of pole pairs P so as to satisfy the above formulas (5) and (29).
The diameter D can be approximated to be equal to the outer diameter of the rotor 11 (that is, the rotor diameter).

[Optimum value of diameter D when shaft length is limited]
In the following, in addition to the back yoke inner diameter Db related to the outer diameter of the claw pole type motor 10 (that is, the outer diameter of the stator 12), the diameter D is optimal with the axial length of the claw pole type motor 10 set to a predetermined value. A method for realizing the above will be described.
In the following, it is assumed that the thickness T and the thickness Tc of the winding portion are unchanged even when the back yoke inner diameter Db changes.
Here, the cross-sectional area S _i of the winding portion is described, for example, as shown in the following formula (30).

  And based on the said Numerical formula (30), the total conduction loss P per unit current is described as shown, for example in the following Numerical formula (31).

In the above equation (31), since the term relating to the ratio r is only the function F4 (r, H), the ratio r that maximizes the value of the function F4 (r, H) is the optimal ratio rpt.
Based on the partial differentiation of the function F4 (r, H) with respect to the ratio r, the optimum ratio ropt is described as shown in the following equation (32), for example.

Here, since the analysis process described above does not consider saturation due to inductance, the lower limit value of the ratio r is calculated, and the above formula (5) is satisfied for the ratio r equal to or greater than the lower limit value. By setting the nail height H and the pole pair number P, the diameter D can be optimized.
Although the nail height H changes according to the ratio r, when the effective length L _s is set to the maximum value based on the above formula (6), the nail height H <the effective length L _s , The ratio r is described as shown in the following formula (33).
The diameter D can be approximated to be equal to the outer diameter of the rotor 11 (that is, the rotor diameter).

As described above, according to the stator of the claw pole type motor according to the present embodiment, the field magnetic flux between the permanent magnet 11a of the rotor 11 and the claw-shaped induction poles 32, 42, 52 of the stator 12. Can be effectively used, and the total conduction loss P per unit current when generating a desired torque can be set to the minimum, and the operating efficiency of the claw pole motor can be improved.
Furthermore, according to the method of manufacturing a claw pole type motor stator according to the present embodiment, for example, when the claw pole type motor 10 is mounted on a vehicle, the shape of the claw pole type motor 10 such as an outer diameter and an axial length is provided. Even when there is a limitation, the stator 12 can be formed in an appropriate shape so that the field magnetic flux of the permanent magnet 11a of the rotor 11 can be used effectively and a unit for generating a desired torque can be used. The total conduction loss P per current can be set to the minimum, and the operating efficiency of the claw pole type motor can be improved.

  In the above-described embodiment, the stator rings 21 and 22 that constitute the stator 12 with respect to the inner rotor type claw pole motor 10 in which the rotor 11 is disposed on the inner peripheral side of the stator 12. 23, the method of setting the shape of each of the claw-shaped induction poles 32, 42, 52 has been described. In the following, an outer rotor type claw pole type in which the rotor 11 is disposed on the outer peripheral side of the stator 12 is described. A method for setting the shape of the claw-shaped induction poles 32, 42, 52 of the stator rings 21, 22, 23 constituting the stator 12 to the motor 10 will be described.

[Optimum value of diameter D]
The outer rotor type claw pole type motor 10 is different from the inner rotor type claw pole type motor 10 described above in that the claw tip width W is larger than the claw base end width W _s , The necessary condition corresponding to the equation (5) is described as shown in the following equation (34), for example.
In the outer rotor type claw pole motor 10, for example, as shown in FIG. 27, the diameter D is the outer diameter of the outer peripheral end of each phase induction pole body 32a, 42a, 52a, and the back yoke outer diameter Db. Is the diameter of the inner peripheral side end of each of the winding mounting portions 31a, 41a, 41b, 51a, and the ratio r is the ratio (Db / D) between the back yoke outer diameter Db and the diameter D.
Further, (D-2H)> Db.

The effective length L _s is described as shown in the following formula (35) in the same manner as the inner rotor claw pole motor 10 described above.

  For the thickness T, for example, the larger one of the minimum values T1 and T2 of the thickness T described as shown in the following formula (36) and formula (37) may be selected. For the large number P of pole pairs, the minimum value T2 corresponding to the following formula (37) is selected.

  Based on the above formula (37), the total sum of the thicknesses T of all phases is described, for example, as shown in the following formula (38).

Here, when the number of the claw-shaped induction poles 32, 42, 52 is three or more, the axial length of the claw pole type motor 10 is determined by considering the thicknesses of the winding portions. since always larger than the effective length L _s at 52B, in the same manner as the above equation (18) for the claw pole type motor 10 of the inner rotor type mentioned above, it is impossible to ensure the area of the winding portion.
Therefore, shall ensure a winding portion in proportion to the effective length L _s, if the axial length ratio and kf, motor shaft length (i.e. Tsumecho of) L indicates, for example, the following equation (39) Is described as follows.

  The torque constant kt is described as shown in the following formula (40), and further, the torque constant ktv per unit volume is described as shown in the following formula (41) based on the formula (39). .

Then, the thickness Tc _i and the cross-sectional area S _i of the winding part are described as shown in the following formula (42), for example.

  And based on the said Numerical formula (42), the total conduction loss P per unit current is described as shown, for example in the following Numerical formula (43).

In the above equation (43), since the term relating to the axial length ratio kf is only the function Fk (r, kf), the axial length ratio kf that minimizes the value of the function Fk (r, kf) is the optimum axis. The length ratio is kfopt.
Based on the partial differentiation of the function Fk (r, kf) with respect to the axial length ratio kf, the optimal axial length ratio kfopt is described, for example, as shown in the following formula (44).

Further, in the above formula (43), the term relating to the nail height H is only the function Fh (r, H). Therefore, the nail height H that maximizes the value of the function Fh (r, H) is optimal. Nail height Hopt.
Based on the partial differentiation of the function Fh (r, H) with respect to the nail height H, the optimum nail height Hopt is described, for example, as shown in the following equation (45).

Since the axial length ratio kf and the claw height H are set independently of each other, even if one of them is not the optimum value, the other optimum value does not change. For example, when the claw height H is an optimum value and there is a margin in the resistance value of the winding, the state where the claw height H is the optimum value does not change even if the axial length ratio kf is not set to the optimum value. .
When the axial length ratio kf and the claw height H are optimum values, the total conduction loss P per unit current in the above equation (43) is a function that depends only on the ratio r. Here, when n = 3 in the above equation (43), for example, as shown in FIG. 28, the optimum nail height Hopt changes in a decreasing trend as the ratio r increases, and Fk (r, kf ) / Fh (r, H) has a maximum value at a ratio r = about 0.3.

Here, as in the case of the above-described inner rotor claw pole motor 10, the above-described analysis processing does not take into account saturation due to inductance. It can be considered that it is a lower limit value of r, and the ratio r and the nail height H are described as shown in the following formula (46).
That is, the diameter D can be optimized by setting the motor shaft length L and the number of pole pairs P so as to satisfy the above formula (34) and the following formula (46).
The diameter D can be approximated to be equal to the inner diameter of the rotor 11 (that is, the rotor diameter).

[Optimum value of diameter D when shaft length is limited]
When the motor shaft length L is set to a predetermined value in the outer rotor type claw pole type motor 10, the total conduction loss P per unit current is described, for example, as shown in the following formula (47).

  Here, when the following formula (48) based on the above formula (39) is substituted into the above formula (47) and the approximation shown in the following formula (49) is performed based on the above formula (35), the above formula (47) Is described, for example, as shown in the following formula (50).

In the above equation (50), terms according to nail the height H is only function _FL s (r, H), the function _FL s (r, H) claw height H to the maximum value of, optimal It becomes nail height Hopt.
Based on the partial differentiation of the function FL _s (r, H) with respect to the nail height H, the optimum nail height Hopt is described, for example, as shown in the following equation (51).

When the optimum nail height Hopt shown in the above equation (51) is set as the nail height H in the above equation (50), the function FL _s (r, H) becomes a function that depends only on the ratio r. Here, in the above formula (50), for example, when the diameter D = 200 mm and the motor shaft length L = 50 mm are set, for example, as shown in FIG. 29, the value of the function FL _s (r, H) has the ratio r = The maximum is about 0.5.
Here, since the above-described analysis processing does not consider saturation due to inductance, the above-described optimum ratio r = about 0.5 can be regarded as a lower limit value of the ratio r, and is equal to or higher than this lower limit value. The diameter D can be optimized by setting the nail height H and the number P of pole pairs so that the above formula (34) is satisfied with respect to the ratio r.
The diameter D can be approximated to be equal to the inner diameter of the rotor 11 (that is, the rotor diameter).

The total conduction loss P per unit current is also varied by the ratio kc _i of the thickness of the winding portion of each phase shown in the equation (19) (or cross-sectional area), claw according to the above-described embodiment In the pole type motor 10, two-phase windings 24 and 25A, 25B and 26 are arranged in the respective winding mounting portions 61 and 62. At this time, for example, as shown in FIG. 30, if the area ratio of the two-phase windings is 1: k in each of the winding mounting portions 61 and 62, the total conduction loss P per unit current is expressed by the following formula (52). Is described as follows.
And based on the following numerical formula (53) obtained by partial differentiation of the total conduction loss P per unit current in the following numerical formula (52), the loss generated in each winding mounting portion 61, 62 is k = 1. In the case of.

It is a principal part disassembled perspective view which shows the structure of the claw pole type motor which concerns on embodiment of this invention. It is a principal part perspective view of the stator of the claw pole type motor which concerns on embodiment of this invention. It is a principal part perspective view which fractures | ruptures and shows a part of U-phase stator ring shown in FIG. It is a principal part perspective view which fractures | ruptures and shows a part of V-phase stator ring shown in FIG. It is a principal part perspective view which fractures | ruptures and shows a part of W-phase stator ring shown in FIG. It is a principal part perspective view which fractures | ruptures and shows a part of stator of the claw pole type motor shown in FIG. FIG. 3 is a plan view of a main part of a stator of the claw pole type motor shown in FIG. 2 viewed along an axial direction. It is XX sectional drawing shown in FIG. It is the YY sectional view taken on the line shown in FIG. FIG. 8 is a sectional view taken along line ZZ shown in FIG. 7. It is a principal part perspective view which fractures | ruptures and shows a part of U-phase stator ring shown in FIG. It is a figure which shows typically the cross section with respect to the circumferential direction of the stator of the claw pole type motor shown in FIG. It is the principal part side view which looked at each nail | claw-shaped induction pole along the circumferential direction. It is a principal part perspective view which fractures | ruptures and shows a part of U-phase stator ring shown in FIG. It is a principal part perspective view which fractures | ruptures and shows a part of U-phase stator ring shown in FIG. It is a principal part perspective view which fractures | ruptures and shows a part of U-phase stator ring shown in FIG. It is a principal part perspective view which fractures | ruptures and shows a part of U-phase stator ring shown in FIG. It is a principal part perspective view which fractures | ruptures and shows a part of U-phase stator ring shown in FIG. It is a figure which shows an example of the change with respect to the number P of pole pairs of each minimum value T1, T2 of thickness T. It is a figure which shows typically the cross section with respect to the circumferential direction of a U-phase claw-shaped induction pole. FIG. 21A is a diagram schematically showing a cross section of the claw pole motor shown in FIG. 2 in the circumferential direction with respect to the claw height H → 0, and FIG. → (1-r) Db / 2 is a view schematically showing a cross section of the stator of the claw pole type motor shown in FIG. 2 in the circumferential direction. It is a figure which shows typically the relationship between an electric current and a linkage flux. It is a figure which shows an example of the time change of the electric power generated of the claw pole type motor concerning the embodiment of the present invention. It is a figure which shows the example of the change according to the true value of the 3rd term of the numerical formula which shows the total conduction | electrical_connection loss per unit current, and the nail | claw height H of the primary approximation regarding nail | claw height H, and upper limit approximation. It is a figure which shows the example of the change according to ratio r of optimal nail | claw height H1opt and H2opt. It is a figure which shows the example of the change according to ratio r of value F3_1 (r) of the function F3 (r) at the time of setting the proportionality coefficient h according to each optimal nail | claw height H1opt, H2opt. . It is a figure which shows typically the cross section with respect to the circumferential direction of a U-phase claw-shaped induction pole. It is a figure which shows the example of the change according to ratio r of optimal nail | claw height Hopt and Fk (r, kf) / Fh (r, H). Is a diagram illustrating an example of a change corresponding to the ratio r of the function FL s _(r, H). It is a figure which shows typically the cross section with respect to the circumferential direction of an angular claw-like induction pole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Rotor 11a Permanent magnet 12 Stator 21 U-phase stator ring 22 V-phase stator ring 23 W-phase stator ring 24 U-phase winding 25A 1st V-phase winding 25B 2nd V-phase winding 26 W-phase winding 31 U-phase back Yoke 32 U-phase claw-shaped induction pole 32B U-phase facing surface 32E Bottom surface 32F Base end surface 32b U-phase extension 32a U-phase induction pole body 41 V-phase back yoke 42 V-phase claw-shaped induction electrode 42B V-phase facing surface 42a V-phase induction Polar body 42b V-phase extension part 42c V-phase extension part 51 W-phase back yoke 52 W-phase claw-shaped induction pole 52B W-phase facing surface 52a W-phase induction pole body 52b W-phase extension part 61 First winding mounting part 62 2nd Winding mounting part 80 Contact surface 81 Passing area surface 82 Internal area surface

Claims (6)

The stator rings of a plurality of phases are arranged so as to be coaxially stacked along the axial direction, and a rotor having a permanent magnet is rotated in an annular winding mounting portion formed between the stator rings adjacent in the axial direction. An annular winding for generating a rotating magnetic field is disposed, and claw-like induction poles projecting radially from the stator ring body of each phase are provided, and the claw-like induction poles of each phase are sequentially arranged along the circumferential direction and A stator of a claw pole type motor arranged to be opposed to a permanent magnet,
The stator ring includes the annular stator ring main body and the claw-shaped induction pole protruding in a radial direction from the stator ring main body,
The winding mounting portion is provided on the stator ring body, and the annular winding is mounted on the winding mounting portion so as to be covered by the stator ring body in the axial direction.
The claw-shaped induction electrode includes an induction electrode body and an extension part,
The induction pole body includes a facing surface facing the permanent magnet ,
The extension portion protrudes from the side surface along the circumferential direction of the induction pole body and is connected to the inner circumferential surface of the stator ring body ,
Compared to the area of the magnetic flux passage area where the effective magnetic flux passes through the area where the dielectric pole bodies of each phase overlap on the facing surface of the induction pole body, the magnetic flux passage area surface inside the induction pole body The stator of the claw-pole motor is characterized in that the area of is set larger. Compared to the area of the magnetic flux passage area where the effective magnetic flux passes through the area where the dielectric pole bodies of each phase overlap on the facing surface of the induction pole body, the extension part and 2. An area of a contact surface between the induction pole main body, the extension portion, and the stator ring main body, which is a passage area surface of a magnetic flux flowing out to the stator ring main body, is set to be larger. The stator of the claw pole type motor described in 1. The stator ring body from the inside of the induction pole body compared to the area of the magnetic flux passage area where the effective magnetic flux passes through the area where the dielectric pole bodies of each phase overlap on the facing surface of the induction pole body The area of the contact surface between the induction pole body and the extension portion and the stator ring body, which is the surface area of the magnetic flux flowing out into the stator ring body and the magnetic flux flowing out from the inside of the extension portion into the stator ring body, is set larger. The stator of a claw pole type motor according to claim 1 or 2, wherein the stator is a claw pole type motor. The stator ring body includes a winding portion on which the annular winding is mounted, and a back yoke that connects the stator rings adjacent in the axial direction.
The ratio of the inner diameter of the stator to the inner diameter of the back yoke when the stator is disposed opposite to the outer peripheral portion of the rotor, and the case where the stator is disposed opposite to the inner peripheral portion of the rotor. 4. The claw pole motor according to claim 1, wherein a ratio of an outer diameter of the back yoke to an outer diameter of the stator is set to a predetermined value or more. 5. stator. The inner diameter of the stator when the stator is disposed opposite to the outer peripheral portion of the rotor and the outer diameter of the stator when the stator is disposed opposite to the inner peripheral portion of the rotor are appropriately determined. The distance from the base end to the tip end of the induction pole body along the radial direction is set to a predetermined value or more in the state set to the value of The stator of the claw pole type motor described in 1. The stator rings of a plurality of phases are arranged so as to be coaxially stacked along the axial direction, and a rotor having a permanent magnet is rotated on an annular winding mounting portion formed between the stator rings adjacent in the axial direction. An annular winding for generating a rotating magnetic field is arranged, and claw-like induction poles projecting radially from the stator ring main body of each phase are provided, and the claw-like induction poles of each phase are sequentially arranged along the circumferential direction and A method for manufacturing a stator of a claw pole type motor that is arranged opposite to a permanent magnet,
The stator ring includes the annular stator ring main body and the claw-shaped induction pole protruding in a radial direction from the stator ring main body,
The winding mounting portion is provided on the stator ring body, and the annular winding is mounted on the winding mounting portion so as to be covered by the stator ring body in the axial direction.
The claw-shaped induction electrode includes an induction electrode body and an extension part,
The induction pole body includes a facing surface facing the permanent magnet ,
The extended portion is connected to the inner peripheral surface of the projecting the stator ring body from the side along the circumferential direction of the induction electrode body, the stator ring body, a winding portion in which the loop windings are mounted, axially A back yoke connecting the stator rings adjacent to each other,
A volume calculating step for calculating the volume of the claw pole type motor based on the diameter of the back yoke;
A torque constant calculating step of calculating a torque constant per unit volume based on the volume calculated in the volume calculating step;
A total conduction loss calculating step for calculating a total conduction loss per unit current based on the thickness of the winding mounting part along the axial direction and the area of the cross section with respect to the radial direction of the winding mounting part;
And a step of calculating a distance from the proximal end to the distal end of the induction pole body along the radial direction, which minimizes the total conduction loss calculated in the total conduction loss calculation step. Of manufacturing a stator of a mold motor.

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