KR102128715B1 - motor - Google Patents

Abstract

In the motor, the armature core has a plurality of teeth arranged adjacent to each other. A plurality of permanent magnets are accommodated in each of the plurality of teeth. The protruding poles have one or more protruding poles, and the protruding poles are arranged toward the teeth. Each permanent magnet housed in two adjacent teeth is arranged to face the same magnetic pole. If the pitch of the teeth is P1 and the pitch of the protruding poles is P2, (P1/P2) <1/6, or 5/6 <(P1/P2) <7/6 is satisfied.

Description

motor

The present invention relates to a motor having an armature provided with a permanent magnet.

Conventionally, a motor is known in which an armature having a permanent electrode is rotated with respect to an armature individually receiving a permanent magnet in each tooth of the armature core. In such a conventional motor, armature windings are individually provided for each tooth with a concentrated winding (for example, see Patent Document 1).

Japanese Patent Publication No. 2002-199679

In the conventional motor shown in Patent Document 1, since the number of protruding poles is 5 and the number of teeth of the armature is 6, the magnetic flux of the 2-pole pair is modulated by the protruding pole having 5 magnetomotive force of the 3-pole pair by 6 permanent magnets. Occurs. Therefore, when the relationship between the number of poles and the number of teeth formed by the armature winding is expressed as a pole/slot combination of the "stimulus number: the number of teeth" series, in the conventional motor shown in Patent Document 1, a 2:3 series pole/slot It operates in combination, and the cogging torque increases.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a motor capable of reducing cogging torque or cogging thrust.

The motor according to the present invention includes an armature core having a plurality of teeth arranged adjacent to each other, a plurality of permanent magnets accommodated in each of the plurality of teeth, and an armature having a plurality of armature windings provided in each of the plurality of teeth, And one or more protruding poles, the protruding poles having the protruding poles facing the teeth, and the armature and the protruding poles being relatively movable in a direction in which a plurality of the teeth are arranged. Each permanent magnet accommodated is arranged to face the same magnetic pole. If the pitch of the teeth is P1 and the pitch of the protruding poles is P2, (P1/P2) <1/6, or 5/6 <(P1 /P2) <7/6 is satisfied.

According to the motor according to the present invention, since the relationship between the pitch P1 of the teeth and the pitch P2 of the protruding poles satisfies the above expression, the fundamental wave order of cogging can be increased. Thereby, the amplitude value of the fundamental wave order of cogging can be made small, and the cogging torque or cogging thrust can be reduced.

1 is a configuration diagram showing a motor according to Embodiment 1 of the present invention.
FIG. 2 is a wiring diagram showing 12 armature windings of FIG. 1.
3 is a configuration diagram showing a motor according to Embodiment 2 of the present invention.
4 is a configuration diagram showing a motor according to Embodiment 3 of the present invention.
5 is a configuration diagram showing a motor according to Embodiment 4 of the present invention.
6 is a configuration diagram showing a motor according to Embodiment 5 of the present invention.
7 is a configuration diagram showing a motor according to Embodiment 6 of the present invention.
8 is a configuration diagram showing a motor according to Embodiment 7 of the present invention.
9 is a configuration diagram showing a motor according to Embodiment 8 of the present invention.
10 is a configuration diagram showing a motor according to Embodiment 9 of the present invention.
11 is a configuration diagram showing a motor according to Embodiment 10 of the present invention.
12 is a table showing a combination of k, m and Q values when Q=3·k·m is satisfied in the motor according to Embodiment 10 of the present invention.
13 is a table showing a combination of k, m and N values when N=(3·k+0.5)·m is satisfied in the motor according to Embodiment 10 of the present invention.
14 is a table showing a combination of k, m and N values when N=(3·k-0.5)·m is satisfied in the motor according to Embodiment 10 of the present invention.
15 is a table showing a combination of k, m and pole/slot combination values when N=(3·k+0.5)·m is satisfied in the motor according to Embodiment 10 of the present invention.
16 is a table showing a combination of k, m and pole/slot combination values when N=(3·k-0.5)·m is satisfied in the motor according to Embodiment 10 of the present invention.
17 is a configuration diagram showing a motor according to Embodiment 11 of the present invention.
18 is a configuration diagram showing a motor according to Embodiment 12 of the present invention.
19 is a vector diagram showing the 1f component of the cogging torque generated in each tooth of FIG. 18.
20 is a configuration diagram showing a motor according to Embodiment 13 of the present invention.
21 is a configuration diagram showing a motor according to Embodiment 14 of the present invention.
22 is a configuration diagram showing a motor according to Embodiment 15 of the present invention.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with reference to drawings.

(Embodiment 1)

1 is a configuration diagram showing a motor according to Embodiment 1 of the present invention. In the drawing, the motor 1 has an annular armature 2 as a stator and a protruding pole 3 as a rotor that is disposed inside the armature 2 and rotates relative to the armature 2. Therefore, in this example, the motor 1 is a rotating motor.

The armature 2 has an iron armature core 4, a plurality of permanent magnets 5 accommodated in the armature core 4, and a plurality of armature windings 6 provided on the armature core 4. have.

The armature core 4 has an annular core bag 7 and a plurality of teeth 8 projecting from the inner surface of the core bag 7 toward the protruding poles 3, respectively.

The plurality of teeth 8 are arranged at equal intervals adjacent to each other in the circumferential direction of the armature core 4. Thereby, the slots 9 which are spaces are formed between the several teeth 8, respectively. The number of slots 9 is equal to the number of teeth 8. Each slot 9 is open toward the protruding pole 3. In this example, the number of teeth 8 is 12, and the number of slots 9 is 12.

The permanent magnets 5 are individually housed in each tooth 8. In this example, the plate-shaped permanent magnet 5 arranged along the radial direction of the armature 2 is accommodated in the center of the circumferential direction of the teeth 8. Further, each permanent magnet 5 accommodated in two teeth 8 adjacent to each other is arranged to face the same magnetic pole. Therefore, all the permanent magnets 5 adjacent to each other are arranged alternately with magnetic poles with respect to the circumferential direction of the armature 2. In addition, in this example, the permanent magnet 5 is exposed from the teeth 8 on the inner circumferential surface of the armature core 4 and covered by the core bag 7 on the outer circumferential surface of the armature core 4.

Each armature winding 6 is individually provided with a centralized winding on each tooth 8. As a result, in this example, the number of armature windings 6 is 12. Further, each armature winding 6 is accommodated in a slot 9. When each phase of the three phases is represented by U phase, V phase, and W phase, four armature windings 6 of each armature winding 6 are U phase armature windings U11, U12, U21, U22, The other four armature windings 6 are made of V-phase armature windings (V11, V12, V21, V22), and the other four armature windings 6 are made of W-phase armature windings (W11, W12, W21, W22). have. 12 armature windings 6, as shown in FIG. 1, correspond to each of the 12 teeth 8, +U11, -U12, -V11, +V12, +W11 in the counterclockwise direction of FIG. They are listed in the order -W12, -U21, +U22, +V21, -V22, -W21, +W22. However, "+" and "-" indicate different winding polarities of the armature winding 6, and when the current in the same direction flows through each armature winding 6, the direction of the electromagnetic field generated in the armature winding 6 It is shown that they are opposite to each other in the radial direction.

FIG. 2 is a wiring diagram showing the twelve armature windings 6 of FIG. 1. In the armature 2, in consideration of the symmetry of the induced voltage of each armature winding 6, the U-phase armature windings U11, U12, U21, and U22 are sequentially connected in series with the U-phase series circuit and the V-phase armature winding. A common neutral point is a V-phase series circuit in which (V11, V12, V21, V22) are sequentially connected in series, and a W-phase series circuit in which W-phase armature windings W11, W12, W21, and W22 are sequentially connected in series.性點). That is, in the armature 2, a plurality of armature windings 6 are connected by Y connection.

The protruding poles 3 are arranged coaxially with the armature 2. Therefore, the protruding pole 3 has the common axis A with the armature 2. In addition, a gap, that is, an air layer, exists between the protruding pole 3 and the armature 2. Thereby, the armature 2 and the protruding pole 3 are relatively movable in the direction in which the plurality of teeth 8 are arranged, that is, in the circumferential direction of the armature 2.

The protruding pole 3 has a columnar protruding main body 31 and one or more protruding poles 32 provided on the outer peripheral portion of the protruding main body 31. In this example, the number of protruding poles 32 is 11. Each protruding pole 32 is arranged at equal intervals in the direction in which the plurality of teeth 8 are arranged, that is, in the circumferential direction of the armature 2.

Here, the angle formed by two straight lines connecting one end of each of the two teeth 8 adjacent to each other and the axis A is θ1, and one end of each of the two protruding poles 32 adjacent to each other The angle formed by the two straight lines connecting the axis A is θ2. In addition, the angle formed by two straight lines connecting both ends of the permanent magnet 5 in the circumferential direction and the axis A is θ3. In addition, the surface set along the circumferential direction in which the plurality of teeth 8 are arranged is passed as the end surface of the plurality of teeth 8 as the pitch reference surface. In this example, the pitch reference surface is a cylindrical surface centered on the axis A.

In addition, in the common pitch reference plane, the circumferential distance corresponding to the range of θ1 is set to the pitch P1 of the teeth 8, and the circumferential distance corresponding to the range of θ2 is the pitch P2 of the protruding pole 32 The distance in the circumferential direction corresponding to the range of θ3 is set to the pitch P3 of the permanent magnet 5. That is, the interval in the circumferential direction between the teeth 8 in the common pitch reference plane is set to the pitch P1 of the teeth 8, and the interval in the circumferential direction between the protruding poles 32 in the common pitch reference plane is set. The pitch P2 of the protruding poles 32 is set, and the thickness of the permanent magnets 5 on the common pitch reference surface is set to the pitch P3 of the permanent magnets 5.

When the pitch P1 of the teeth 8 and the pitch P2 of the protruding poles 32 are defined as above, the relationship between P1 and P2 becomes a relationship satisfying the following equation (1) or equation (2) have.

(P1/P2) <1/6… (One)

5/6 <(P1/P2) <7/6… (2)

In addition, if the number of teeth 8 is Q and the number of protruding poles 32 facing Q teeth 8 is N, the relationship of the following formula (3) holds. In addition, the number N of the protruding poles 32 need not be a natural number.

(P1/P2) = (N/Q)… (3)

In this example, Q=12 and N=11, and Expression (2) is satisfied.

In the motor 1, the magnetomotive force of a 6-pole pair by 12 permanent magnets 5 is modulated by 11 protruding poles 32 to generate a 5-pole pair of magnetic flux. Therefore, in this example, the motor 1 operates in 10 poles and 12 slots. That is, if the relationship between the number of poles formed by the plurality of armature windings 6 and the number of teeth 8 is expressed as a pole/slot combination of the "number of poles: number of teeth" series, in this example, a 5:6 series pole / The motor (1) operates with a slot combination.

In addition, the relationship between the pitch P3 of the permanent magnet 5 and the pitch P1 of the teeth 8 is set to satisfy the following equation (4).

5 <P1/P3 <10… (4)

In this example, P1/P3 = 7.5, and Expression (4) is satisfied.

In the case of P1/P3 ≤ 5, the ratio of the thickness of the permanent magnet 5 to the width of the teeth 8 becomes too large, so that the teeth 8 tend to self-saturate. In the case of 10 ≤ P1/P3, the ratio of the thickness of the permanent magnet 5 to the width of the teeth 8 becomes too small, so that the amount of magnetic flux of the permanent magnet 5 cannot be sufficiently obtained. Thereby, the relationship between the pitch P3 of the permanent magnet 5 and the pitch P1 of the teeth 8 satisfies Expression (4), whereby the torque of the motor 1 can be increased.

In such a motor 1, since the relationship between the pitch P1 of the teeth 8 and the pitch P2 of the protruding poles 32 satisfies Expression (2), the conventional 2:3 series pole/slot It is possible to increase the fundamental order of cogging than combi. Specifically, since the number of teeth 8 is Q=12 and the number of protruding poles 32 opposite to Q teeth 8 is N=11, the motor 1 can be operated with 10 poles and 12 slots. , It can increase the fundamental wave order of cogging than the conventional 2:3 series pole/slot combination. Thereby, the amplitude value of the fundamental wave order of cogging can be made small, and the cogging torque can be reduced. In the case of the conventional 2:3 series, the winding coefficient is 0.866, whereas in the 5:6 series pole/slot combination of the present embodiment, the winding coefficient is 0.933. Therefore, in this embodiment, the winding coefficient is increased compared with the case of the conventional 2:3 series, and the torque of the motor 1 can be improved.

In addition, since the relationship between the pitch P3 of the permanent magnet 5 and the pitch P1 of the tooth 8 satisfies Expression (4), the magnetic flux amount of the permanent magnet 5 can be sufficiently obtained and the tooth (8) can make it difficult to generate magnetic saturation. Thereby, the induced voltage of the armature 2 can be increased, and the torque of the motor 1 can be increased.

Further, in the above example, the winding arrangement of the plurality of armature windings 6 is a typical winding arrangement of the motor 1 operating in 10-pole 12-slots, but different from the 5/6 series pole/slot combination. In the case of other pole/slot combinations, for example, 8-pole 9-slot, 14-pole 15-slot, etc., a common winding arrangement corresponding to another pole/slot combination can be applied as the winding arrangement of a plurality of armature windings.

(Embodiment 2)

3 is a configuration diagram showing a motor according to Embodiment 2 of the present invention. In this embodiment, Q=12 and N=13. As a result, in this embodiment, the relationship between P1 and P2 is satisfied with the above expression (2). In addition, 12 armature windings 6 correspond to 12 teeth 8, respectively, in the counterclockwise direction of FIG. 3 +U11, -U12, -W11, +W12, +V11, -V12, -U21, + It is listed in the order of U22, +W21, -W22, -V21, +V22. However, "+" and "-" indicate the winding polarities of the armature windings 6 which are different from each other as in the first embodiment.

In this embodiment, the magnetomotive force of a 6-pole pair by 12 permanent magnets 5 is modulated by 13 protruding poles 32 to generate a 7-pole pair of magnetic flux. Therefore, in this example, the motor 1 operates in a 14-pole 12-slot. That is, in this example, the motor 1 operates with a 7:6 series pole/slot combination. Other configurations are the same as in the first embodiment.

Thus, even if Q=12 and N=13, the relationship between P1 and P2 can be satisfied with Expression (2). Specifically, since Q=12 and N=13, the motor 1 can be operated with 14-pole 12-slots, and the motor 1 with a 7:6 series pole/slot combination larger than 5:6 series Can operate. This can further reduce the cogging torque. In addition, since the number of permanent magnets 5 per pole can be reduced, the amount of magnetic flux per pole passing through the core bag 7 can be reduced. Thereby, magnetic saturation in the core bag 7 is less likely to occur, and the thickness in the radial direction of the core bag 7 can be reduced. Therefore, the winding area of the armature winding 6 can be enlarged, and reduction of copper loss of the armature winding 6 can be achieved.

(Embodiment 3)

4 is a configuration diagram showing a motor according to Embodiment 3 of the present invention. In this embodiment, Q=12 and N=1. As a result, in the present embodiment, the relationship between P1 and P2 is satisfied with the above expression (1).

The shape of the stone pole 3 is a column shape. Further, the protruding pole 3 is disposed inside the armature 2 in a state in which the central axis of the cylindrical shape of the protruding pole 3 is eccentric from the axis A. The protruding pole 3 rotates about the armature 2 about the axis A. Thereby, the protruding pole 3 which has one protruding pole 32 is comprised.

In addition, when the number of the protruding poles 32 is 1, the angle from the protruding pole 32 to returning to the original protruding pole 32 after circumscribing the protruding pole 3 is 1, and θ2 is protruding. It becomes 360 degrees which is the angle of one week of the pole 3. Therefore, the pitch P2 of the protruding pole 32 becomes the distance in the circumferential direction for one week of the pitch reference surface.

In this embodiment, the magnetomotive force of a 6-pole pair by 12 permanent magnets 5 is modulated by one protruding pole 32, and a 7-pole pair of magnetic flux is generated. Therefore, in this example, the motor 1 operates in a 14-pole 12-slot. That is, in this example, the motor 1 operates with a 7:6 series pole/slot combination. Other configurations are the same as in the second embodiment.

Thus, even if Q=12 and N=1, the relationship between P1 and P2 can be satisfied with Expression (1). Specifically, since Q=12 and N=1, the motor 1 can be operated with a 7:6 series pole/slot combination similar to the second embodiment, further reducing cogging torque. have. In addition, since the number of permanent magnets 5 per pole can be reduced, the thickness of the core bag 7 in the radial direction can be reduced, thereby reducing copper loss of the armature winding 6. In addition, the relationship between P1 and P2 satisfies Expression (1), whereby the number of the protruding poles 32 in the protruding pole 3 can be reduced, and manufacturing of the protruding pole 3 can be facilitated. .

(Embodiment 4)

5 is a configuration diagram showing a motor according to Embodiment 4 of the present invention. In this embodiment, the armature 2 and the protruding pole 3 are each arranged along the linear direction. That is, in this example, the motor 1 is a linear motor. In addition, in this example, the shape of each of the armature core 4 and the protruding pole 3 is a shape in which the circumferential directions of the armature core 4 and the protruding pole 3 of Embodiment 1 are developed in a linear direction. .

In the motor 1, an iron protruding pole 3 is arranged along the linear direction as a conveyance path of the linear motor. The armature 2 is movable in the linear direction along the protruding pole 3. The protruding body 31 is a plate-shaped member arranged along the linear direction in which the armature 2 moves. The plurality of protruding poles 32 are arranged at equal intervals in a straight line direction along the protruding pole body 31.

The armature 2 is arranged parallel to the protruding pole 3. Thereby, the plurality of teeth 8 are arranged at equal intervals in a straight line direction in which the plurality of protruding poles 32 are arranged. In this example, the number of teeth 8 of the armature core 4 is 12. The armature 2 is arranged with each tooth 8 facing the protruding pole 3.

In this example, each permanent magnet 5 is individually housed in each tooth 8, the surface of the armature core 4 on the side of the protruding pole 3, and the armature core 4 of the protruding pole 3 Each of the permanent magnets 5 is exposed on each side of the side opposite to the side.

Here, the plane set along the straight line direction in which the plurality of teeth 8 are arranged is set as the pitch reference plane after the end faces of the plurality of teeth 8 are arranged. In addition, the interval in the linear direction between the teeth 8 in the common pitch reference plane is set to the pitch P1 of the teeth 8, and the interval in the linear direction between the protruding poles 32 in the common pitch reference plane is set. The pitch P2 of the protruding pole 32 is set. When the pitch P1 of the teeth 8 and the pitch P2 of the protruding poles 32 are defined in this way, the relationship between P1 and P2 is a relationship that satisfies Expression (1) or Expression (2) above.

In addition, also in this embodiment, when the number of teeth 8 is Q and the number of protruding poles 32 facing Q teeth 8 is N, the relationship of said Formula (3) holds. . In addition, the number N of the protruding poles 32 need not be a natural number.

In this example, as in the first embodiment, since Q=12 and N=11, Equation (2) above is satisfied. Therefore, in this example, the motor 1 operates with a 5/6 series pole/slot combination.

In such a motor 1, the protruding poles 3 are arranged along the linear direction, a plurality of teeth 8 are arranged in the linear direction along the protruding poles 3, and the plural teeth 8 are arranged. Since the armature 2 is movable relative to the protruding pole 3 in the linear direction, the permanent magnet is used in the conveying path of the linear motor by using the protruding pole 3 as a conveying path through which the armature 2 moves. (5) There is no need to prepare. Thereby, the increase of the manufacturing cost of the motor 1 which is a linear motor can be suppressed.

That is, in a normal linear motor, an iron core provided with a permanent magnet is used as a transport path for transporting the armature as a mover. For this reason, a permanent magnet is required in proportion to the transport distance of the mover. In the case of long-distance transport, since the transport path becomes long, the amount of use of the permanent magnet increases and the cost increases. On the other hand, in this embodiment, since the armature 2 has a permanent magnet 5, and the protruding pole 3 used as a transport path is made of only iron, even if the transport path is long, the armature 2 is The increase in the amount of use can be suppressed. Therefore, in this embodiment, even in the case of long-distance transportation, an increase in the manufacturing cost of the motor 1 can be suppressed. Further, the armature 2 may be equipped with an amplifier capable of feeding the armature 2.

In addition, in this embodiment also, since Q=12 and N=11, the relationship between the pitch P1 of the teeth 8 and the pitch P2 of the protruding poles 32 can satisfy Expression (2). Thereby, reduction of cogging thrust of the motor 1 which is a linear motor can be aimed at. In the case of the conventional 2:3 series, the winding coefficient is 0.866, whereas in the 5:6 series pole/slot combination of the present embodiment, the winding coefficient is 0.933. Therefore, in this embodiment, the winding coefficient is increased compared with the case of the conventional 2:3 series, and the thrust of the motor 1 which is a linear motor can be improved.

In addition, in the above example, the surface of the armature core 4 is on the side of the side of the protruding pole 3 and the side of the armature core 4 is on the side opposite to the side of the protruding pole 3, and each of the permanent magnets 5 is Although exposed, each permanent magnet 5 is exposed from the surface of the armature core 4 on the side of the protruding pole 3, and each permanent from the surface opposite to the side of the protruding pole 3 of the armature core 4 The magnet 5 may be covered with a core bag 7.

In the above example, Q=12 and N=11 are applied to the linear motor, but like the third embodiment, Q=12 and N=1 may be applied to the linear motor.

(Embodiment 5)

6 is a configuration diagram showing a motor according to Embodiment 5 of the present invention. In this embodiment, Q=12 and N=13. As a result, in this embodiment, the relationship between P1 and P2 is satisfied with the above expression (2).

Therefore, in this embodiment, the magnetomotive force of the 6-pole pair by 12 permanent magnets 5 is modulated by 13 protruding poles 32, and the 7-pole pair's magnetic flux is generated. Therefore, in this example, the motor 1 operates in a 14-pole 12-slot. That is, in this example, the motor 1 operates with a 7:6 series pole/slot combination. Other configurations are the same as in the fourth embodiment.

In this way, in the motor 1 which is a linear motor, even if Q=12 and N=13, the relationship between P1 and P2 can be satisfied with Expression (2). As a result, the motor 1 can be operated with a 7:6 series pole/slot combination that is larger than the 5:6 series, further reducing the cogging thrust of the motor 1, which is a linear motor. In addition, since the number of permanent magnets 5 per pole can be reduced, magnetic saturation in the core bag 7 is less likely to occur, and the thickness in the radial direction of the core bag 7 can be reduced. Therefore, the winding area of the armature winding 6 can be enlarged, and reduction of copper loss of the armature winding 6 can be achieved.

(Embodiment 6)

7 is a configuration diagram showing a motor according to Embodiment 6 of the present invention. In this embodiment, Q=12 and N=11.2.

For example, in order to operate the motor 1 with Q = 12 and 10 poles 12 slots, it is sufficient to satisfy the following equation (5), and Q = 12 and 14 poles with 12 slots to operate the motor 1 In order to make it, the following formula (6) may be satisfied.

5/6 <(P1/P2) <1… (5)

1 <(P1/P2) <7/6… (6)

In this embodiment, since Q=12 and N=11.2, the relationship between P1 and P2 from equation (3) satisfies equation (5). Other configurations are the same as in the fourth embodiment.

Thus, even if the value of N is not a natural number, the motor 1 can be operated without a problem. Thereby, for example, even when the work precision of the protruding pole 3 is poor, it is possible to reduce the cogging thrust of the motor 1 which is a linear motor, and the motor 1 can be operated without problems.

Further, in the above example, although the motor 1 is a linear motor, even if the motor 1 is a rotating motor, it is possible to reduce the cogging torque of the motor 1 as well.

(Embodiment 7)

8 is a configuration diagram showing a motor according to Embodiment 7 of the present invention. In the motor 1 which is a linear motor, projections 11 are provided at the ends of both sides of the armature core 4 with respect to the linear direction in which the teeth 8 are arranged, respectively. Each projection 11 protrudes from the core bag 7 toward the protruding pole 3 and faces the protruding pole 3. In addition, each projection 11 is arranged spaced apart from the teeth 8 with respect to the linear direction in which each of the teeth 8 is arranged. The armature winding 6 is not provided in each projection 11. Each projection 11 is made of the same material as the core bag 7 and is formed of the same material as the core bag 7. In this example, Q=12 and N=11. Therefore, in this example, the relationship between P1 and P2 is satisfied with the above expression (2). Other configurations are the same as in the fourth embodiment.

In such a motor 1, since the projections 11 are provided at both ends of the armature core 4 with respect to the linear direction in which the teeth 8 are arranged, the cogging thrust of the motor 1, which is a linear motor, is provided. The reduction can be further achieved. Further, the thrust of the motor 1 can also be improved.

Further, in the above example, the projections 11 are provided at both ends of the armature core 4, respectively, but the projections are only provided at the ends of one side of the armature core 4 with respect to the linear direction in which the teeth 8 are arranged. 11) may be provided.

(Embodiment 8)

9 is a configuration diagram showing a motor according to Embodiment 8 of the present invention. Each tooth 8 located at the ends of both sides of the armature core 4 with respect to the linear direction in which each tooth 8 is arranged is taken as the end tooth 8a, and each tooth 8 other than the end tooth 8a If is set to the middle teeth 8b, the shape of the end teeth 8a is different from the shape of the middle teeth 8b. The shapes of the intermediate teeth 8b are the same as each other.

The relationship between the pitch P1 of the tooth 8 and the pitch P2 of the protruding pole 32 is a relationship that satisfies Expression (1) or Expression (2) above. In addition, the relationship of P1, P2, Q, and N is a relationship satisfying the above formula (3). In addition, the pitch P1 of the teeth 8 applied to Formulas (1) to (6) is set to the distance between each middle tooth 8b in the pitch reference plane. Other configurations are the same as in the fourth embodiment.

In such a motor 1, since the shape of the end teeth 8a is different from the shape of the middle teeth 8b, by adjusting the shape of the end teeth 8a, the cogging of the motor 1 which is a linear motor The thrust can be further reduced. That is, in the motor 1 which is a linear motor, unlike the rotating motor, the armature 2 is not continuously continuous in an endless shape, and the end of the armature 2 with respect to the linear direction in which the armature 2 moves Exists and is discontinuous. Therefore, the cogging component is added to the thrust force of the motor 1 due to the presence of the end portion of the armature 2 and being discontinuous. In this embodiment, since the shape of the end teeth 8a is different from the shape of the middle teeth 8b, the cogging component caused by the discontinuity of the armature 2 can be suppressed, and the motor 1 which is a linear motor It is possible to further reduce the cogging thrust. Further, the thrust of the motor 1 can also be improved.

Further, in the above example, the shape of each of the end teeth 8a located at both ends of the armature core 4 is different from the shape of the middle teeth 8b, but among the end teeth 8a, the armature is Only the shape of the end teeth 8a located at one end of the core 4 may be different from the shape of the middle teeth 8b.

In the above example, although the shape of the end teeth 8a is different from the shape of the middle teeth 8b, the reduction of the cogging thrust of the motor 1 is intended, but the end teeth 8a Wow, the pitch of the end teeth 8b, which is the distance between the middle teeth 8b next to the end teeth 8a, and the pitch of the middle teeth 8b, which is the distance between each middle teeth 8b, are different from each other. By doing so, the cogging component caused by the discontinuity of the armature 2 may be suppressed, and the cogging thrust of the motor 1 may be reduced.

(Embodiment 9)

10 is a configuration diagram showing a motor according to Embodiment 9 of the present invention. In this example, as in the eighth embodiment, each of the teeth 8 located at the ends of both sides of the armature core 4 with respect to the linear direction in which each of the teeth 8 are arranged is the end teeth 8a, and the end teeth Each tooth 8 other than (8a) is referred to as an intermediate portion 8b. In this example, among the intermediate teeth 8b, the intermediate teeth 8b positioned next to each of the end teeth 8a are referred to as the end adjacent teeth 8c. When each tooth 8 is defined in this way, the shape of each end adjacent tooth 8c is the shape of each other tooth 8, ie, the middle teeth 8b and the end teeth other than the end adjacent teeth 8c. 8a) Each shape is different. In this example, the shape of the permanent magnet 5 accommodated in the end adjacent teeth 8c differs from the shape of the permanent magnet 5 accommodated in other teeth 8 other than the end adjacent teeth 8c. , The shape of the teeth 8c adjacent to each end is different from the shape of the other teeth 8. In addition, in this example, the thickness of the permanent magnet 5 accommodated in the end adjacent teeth 8c is larger than the thickness of the permanent magnet 5 accommodated in the other teeth 8. The shapes of the middle teeth 8b and the end teeth 8a other than the end adjacent teeth 8c are the same shape. Other configurations are the same as in the eighth embodiment.

In such a motor 1, since the shape of the end adjacent teeth 8c located next to the end teeth 8a is different from the shape of other teeth 8 other than the end adjacent teeth 8c, the armature 2 is The cogging component resulting from discontinuity can be suppressed, and the cogging thrust of the motor 1 can be further reduced. Further, the thrust of the motor 1 can also be improved.

Further, in the above example, the shape of each end adjacent teeth 8c located on both sides of the armature core 4 is different from the shape of the other teeth 8, but the end portion located on one side of the armature core 4 Only the shape of the adjacent teeth 8c may be different from the shape of the other teeth 8.

(Embodiment 10)

11 is a configuration diagram showing a motor according to Embodiment 10 of the present invention. In this embodiment, the number Q of teeth 8 is set to a value satisfying the following expression (7), and the number N of the protruding poles 32 facing the Q teeth 8 is the following expression (8) Is set to a value that satisfies.

Q = 3·k·m… (7)

N = (3·k±0.5)·m… (8)

However, k is a natural number of 2 or more, that is, k=2, 3, 4,… And m is a natural number of 1 or more, ie m=1, 2, 3,… to be.

In this example, k=2 and m=2 are satisfied, and Q=12 and N=11.

12 is a table showing a combination of values of k, m and Q when Q=3·k·m is satisfied in the motor according to Embodiment 10 of the present invention. 13 is a table showing a combination of values of k, m, and N when N=(3·k+0.5)·m is satisfied in the motor according to Embodiment 10 of the present invention. 14 is a table showing a combination of values of k, m and N when N=(3·k−0.5)·m is satisfied in the motor according to Embodiment 10 of the present invention. 15 is a table showing a combination of values of k, m and pole/slot combination when N=(3·k+0.5)·m is satisfied in the motor according to Embodiment 10 of the present invention. 16 is a table showing a combination of values of k, m and pole/slot combination when N=(3·k-0.5)·m is satisfied in the motor according to Embodiment 10 of the present invention. In addition, in FIG. 15 and FIG. 16, the display which gives "P" to the number of poles and "S" to the number of teeth, that is, the number of poles is used as the display of the value of the pole/slot combination. For example, when the number of poles is 5 and the number of teeth is 6, "5P6S" is used as an indication of the value of the pole/slot combination.

In this embodiment, as shown in Figs. 12 to 16, Q and N are set according to the values of k and m in the range of k>1 and m≥1. Other configurations are the same as in the first embodiment.

In such a motor 1, since Q satisfies equation (7) and N satisfies equation (8), the fundamental wave of torque can be increased, thereby increasing the torque of motor 1 Can. Further, since k>1, the winding coefficient can be improved to increase the torque, and at the same time, the cogging torque caused by the pole/slot combination can be reduced.

Further, since m=2 is satisfied in equations (7) and (8), the cogging torque generated by the action of the protruding poles 3 and the permanent magnets 5 is extinguished from each other between the teeth 8. can do. Thereby, the cogging torque can be further suppressed.

Further, in the motor 1, when N=(3·k-0.5)·m is satisfied, the armature core 4 and the stone are compared to when N=(3·k+0.5)·m is satisfied. The fundamental wave of the magnetic flux density of the air layer existing between the poles 3 improves. Therefore, by setting the number of teeth 8 and the number of protruding poles 32 to satisfy Q=3·k·m and satisfy N=(3·k-0.5)·m, the motor 1 The torque can be further increased.

(Embodiment 11)

17 is a configuration diagram showing a motor according to Embodiment 11 of the present invention. In this embodiment, Q and N satisfy|fill the said Formula (7) and Formula (8), and m=1 and k>1 in Formula (7) and Formula (8). In this example, m=1 and k=2 are satisfied. Thereby, in this example, Q=6 and N=5.5. Other configurations are the same as in the fourth embodiment.

In such a motor 1, Q and N satisfy the above expressions (7) and (8), and in equations (7) and (8), m=1, k>1, The number of teeth 8 and permanent magnets 5 in each pole slot combination can be minimized. For example, the pole/slot combination of "10P12S" may be set to "5P6S", or the pole/slot combination of "16P18S" may be set to "8P9S". By this, when the volume of the motor 1 is made constant, the thickness of the permanent magnet 5 can be maximized in each pole/slot combination, and the person flowing from the permanent magnet 5 to the protruding pole 3 You can increase the redemption. Therefore, the induced voltage at the armature 2 can be increased, and the thrust of the motor 1 can be increased.

In this example, since m=1 and k=2 are satisfied, and Q=6 and N=5.5, the permanent magnet 5 is used in the motor 1 operating in the 5:6 series pole/slot combination. The number can be minimized. Thereby, the thickness of the permanent magnet 5 can be maximized within the 5/6 series pole/slot combination, thereby increasing the magnetic flux density of the air layer and increasing the thrust of the motor 1 as a linear motor. .

In addition, when N=(3·k-0.5)·m is satisfied, the fundamental wave of the magnetic flux density of the air layer can be improved than when N=(3·k+0.5)·m is satisfied. Thereby, by satisfying N=(3·k-0.5)·m, it is possible to further increase the thrust of the motor 1 which is a linear motor.

In the above example, the linear motor is configured such that Q and N satisfy the above expressions (7) and (8), and m=1 and k>1 in equations (7) and (8). Although applied, Q and N satisfy the above equations (7) and (8), and in the equations (7) and (8), m=1, k>1 are applied to the rotating motor. You may do it. Even in this way, the thickness of the permanent magnet 5 can be maximized in each pole/slot combination, and the torque of the rotating motor can be increased.

(Embodiment 12)

18 is a configuration diagram showing a motor according to Embodiment 12 of the present invention. In this embodiment, Q and N satisfy|fill the said Formula (7) and Formula (8), and m=2 and k>1 in Formula (7) and Formula (8). In this example, m=2 and k=2 are satisfied. Thereby, in this example, Q=12 and N=11.

When m=2 is satisfied in equations (7) and (8), the 1f component of the cogging torque generated by the action of the protruding pole 3 and the permanent magnet 5, that is, the cogging torque component appearing at the same period as the fluctuation of the air layer Occurs between each tooth 8 in the direction of disappearing from each other. In addition, in FIG. 18, the numbers 1 to 12 (numbers enclosed by a circular frame) that are successively assigned to each tooth 27 in a straight line direction are indicated as tooth numbers.

19 is a vector diagram showing the 1f component of the cogging torque generated in each tooth 8 in FIG. 18. In FIG. 19, vectors of the 1f component of the cogging torque generated individually in each tooth 8 in FIG. 18 are collectively shown for each of the tooth numbers 1 to 12. As shown in Fig. 19, it can be seen that when all the 1f components of the cogging torque generated in each of the teeth 8 of the teeth numbers 1 to 12 are added, the synthesis vector of the 1f components of the cogging torque becomes almost zero. Other configurations are the same as in Embodiment 11.

In such a motor 1, Q and N satisfy the above expressions (7) and (8), and in equations (7) and (8), m=2, k>1, The 1f components of the cogging torque generated in each tooth 8 can be extinguished from each other. Thereby, reduction of the cogging torque of the motor 1 can be aimed at further.

(Embodiment 13)

20 is a configuration diagram showing a motor according to Embodiment 13 of the present invention. In this embodiment, Q and N satisfy|fill the said Formula (7) and Formula (8), and m=4 and k>1 in Formula (7) and Formula (8). In this example, m=4 and k=2 are satisfied, and Q=24 and N=22. In addition, in this example, the motor 1 is a rotating motor.

When m=4 is satisfied in equations (7) and (8), the shape of the protruding poles 3 when viewed along the axis A becomes symmetrical with respect to the straight line passing through the axis A. In addition, in the equations (7) and (8), when m=4 is satisfied, the first straight line and the first straight line and the crossings of the pole/slot combination when viewed along the axis A pass through the axis A and are orthogonal to each other. 2 It becomes symmetrical about any of the straight lines. Other configurations are the same as in Embodiment 10.

In such a motor 1, Q and N satisfy the above expressions (7) and (8), and in equations (7) and (8), m=4, k>1, The symmetry of the shape of the protruding pole 3 and the symmetry of the pole/slot combination of the motor 1 can be secured. Thereby, reduction of vibration and noise of the motor 1 can be aimed at.

In addition, since the symmetry of the induced voltage of the armature 2 can be secured, the wiring of the plurality of armature windings 6 can be made into two parallel connections. When a plurality of armature windings 6 are connected in parallel, a plurality of pairs of armature winding series parts are formed by connecting adjacent armature windings 6 of the same phase in series, respectively. Parallel the armature winding series of Joe's frostbite. In a motor in which multiple sets of in-phase armature winding series parts are connected in parallel, when n is a natural number of 2 or more, a relationship of m=2·n is established, and the parallel number C of the in-phase armature winding series parts is a factor other than 1 of n. do. Further, when the relationship of m=2·n holds, and the parallel number C of the in-phase armature winding series part is a divisor of n other than 1, the armature winding 6 connected in series at one armature winding series part The number becomes Q/(3·C). Thereby, the balance of an induced voltage can be improved, and reduction of torque ripple, vibration, and noise of the motor 1 can be aimed at.

(Embodiment 14)

21 is a configuration diagram showing a motor according to Embodiment 14 of the present invention. In this embodiment, Q and N satisfy|fill the said Formula (7) and Formula (8), and m=2 and k=2 in Formula (7) and Formula (8). Thereby, Q=12, N=11, or 13. Therefore, in the case of N=11, the motor 1 operates in 12 poles of 10 poles, and in the case of N=13, the motor 1 operates in 12 poles of 14 poles. In this example, the motor 1 is a rotating motor.

Considering the balance of the air layer (G), the thickness (d) of the permanent magnet (5), and the winding coefficient, when m = 2 and k = 2 in equations (7) and (8) are satisfied, the air layer (G) The ratio between 2 mm to 4 mm, the circumferential length D of the outer peripheral surface 4a of the armature core 4 and the thickness d of the permanent magnet 5 per piece is (37 to 45):1. By this, the induced voltage of the armature 2 becomes the largest. Other configurations are the same as in Embodiment 10.

In this motor 1, Q and N satisfy the above equations (7) and (8), and in equations (7) and (8), m = 2 and k = 2, By considering the balance of the air layer (G), the thickness (d) of the permanent magnet (5), and the winding coefficient, the armature (2) is adjusted by adjusting the size of each of the air layer, the armature core (4), and the permanent magnet (5). The induction voltage of can be increased. Thereby, reduction in cogging torque of the motor 1 which is a rotating motor can be aimed at.

(Embodiment 15)

22 is a configuration diagram showing a motor according to Embodiment 15 of the present invention. In the present embodiment, as in the fourteenth embodiment, Q and N satisfy the above expressions (7) and (8), and in equations (7) and (8), m=2 and k=2 Doing. Thereby, Q=12, N=11, or 13. Therefore, in the case of N=11, the motor 1 operates in 12 poles of 10 poles, and in the case of N=13, the motor 1 operates in 12 slots of 14 poles. In this example, the motor 1 is a linear motor.

Considering the balance of the air layer (G), the thickness (d) of the permanent magnet (5), and the winding coefficient, when m = 2 and k = 2 in equations (7) and (8) are satisfied, the air layer (G) When the ratio of the total length D of the armature core 4 in the linear direction of 2 mm to 4 mm and the thickness d of the permanent magnet 5 per piece is (37 to 45):1, the armature is The induced voltage of (2) becomes the largest. Other configurations are the same as in Embodiment 11.

In this motor 1, Q and N satisfy the above equations (7) and (8), and in equations (7) and (8), m = 2 and k = 2, By considering the balance of the air layer (G), the thickness (d) of the permanent magnet (5), and the winding coefficient, the armature is adjusted by adjusting the size of each of the air layer (G), the armature core (4), and the permanent magnet (5). The induction voltage of (2) can be increased, and the cogging thrust of the motor 1, which is a linear motor, can be reduced. That is, even if the motor 1 is a linear motor, the same effect as that of a rotating motor can be obtained.

Further, in Embodiments 14 and 15, m=2 is satisfied in Expressions (7) and (8), but when k=2, even if m is a natural number of 1 or 3 or more, the motor 1 It is possible to reduce the cogging torque or cogging thrust.

1: Motor 2: Armature
3: Stone pole 4: Armature core
5: permanent magnet 6: armature winding
8: Teeth 32: Surge

Claims (9)

An armature core having a plurality of teeth arranged adjacent to each other, a plurality of permanent magnets accommodated in each of the plurality of teeth, and an armature having a plurality of armature windings provided in each of the plurality of teeth, and
It has one or more protruding poles that modulate the magnetic force generated by the plurality of permanent magnets, and has a protruding pole arranged in the state facing the teeth,
The armature and the protruding pole are relatively movable in a direction in which the plurality of teeth are arranged.
Each of the permanent magnets accommodated in the two adjacent teeth is arranged to face the same magnetic pole,
If the pitch of the teeth is P1 and the pitch of the protruding poles is P2,
(P1/P2) <1/6, or
5/6 <(P1/P2) <7/6
Satisfied,
If the number of the teeth is Q, the number of the protruding poles facing the Q teeth is N, and k is a natural number of 2 or more and m is a natural number of 1 or more,
Q = 3·k·m, and
N = (3·k±0.5)·m
Satisfying,
A three-phase current is supplied to the plurality of armature windings,
satisfies k=2 and m=2,
The plurality of armature windings are respectively disposed on the teeth so that the magnetic force generated by the plurality of permanent magnets generates a magnetic flux of 5 or 7 pole pairs, which is the same number of pole pairs of the magnetic flux modulated by the protruding pole.
motor. The method according to claim 1,
If the pitch of the permanent magnet is P3,
5 <P1/P3 <10
Satisfying
motor. The method according to claim 1 or claim 2,
A three-phase current is supplied to the plurality of armature windings,
If the relationship between the number of poles formed by the plurality of armature windings and the number of teeth is expressed as a pole/slot combination of the number of poles: the number of teeth series,
The pole/slot combination is [(NQ/2)×2]:Q series
motor. The method according to claim 1 or claim 2,
The number of armature windings disposed in each of the teeth is 12,
Of the 12 armature windings respectively disposed in the adjacent teeth, four of the armature windings are composed of armature windings U11, U12, U21, U22 of U, and the other four armature windings are V-phase armature windings V11, V12 , V21, V22, and the remaining four said armature windings are composed of armature windings W11, W12, W21, W22 on W,
If "+" and "-" indicate that the current in the same direction flows through the armature winding, indicate that the directions of the electromagnetic fields generated in the armature winding are opposite to each other in the radial direction.
The armature winding is +U11, -U12, -V11, +V12, +W11, -W12, -U21, +U22, +V21, -V22, -W21, +W22, or +U11, respectively, on the teeth. -U12, -W11, +W12, +V11, -V12, -U21, +U22, +W21, -W22, -V21, +V22
motor. The method according to claim 1 or claim 2,
A plurality of sets of armature winding series portions are formed by connecting the plurality of armature windings in series,
The plurality of sets of in-phase armature winding series parts are connected in parallel,
If n is a natural number of 2 or more, the relationship of m=2·n is established,
The parallel number C of the series of armature windings of the plurality of sets of in-phase windings is a factor other than 1 of n,
The number of armature windings connected in series at the armature winding series part is Q/(3·C).
motor. The method according to claim 1 or claim 2,
The protruding poles are arranged in a straight line direction,
The plurality of teeth are arranged in the linear direction,
The armature is movable relative to the protruding pole in the linear direction.
motor. The method according to claim 6,
If, among the plurality of teeth, the teeth located next to the end teeth in the linear direction are the end adjacent teeth,
The shape of the permanent magnet accommodated in the teeth adjacent to the end is different from the shape of the permanent magnet accommodated in the teeth other than the teeth adjacent to the end.
motor. delete delete

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