WO2020027275A1

WO2020027275A1 - Synchronous motor and motor assembly

Info

Publication number: WO2020027275A1
Application number: PCT/JP2019/030264
Authority: WO
Inventors: 哲夫岡本
Original assignee: トクデンコスモ株式会社
Priority date: 2018-08-01
Filing date: 2019-08-01
Publication date: 2020-02-06
Also published as: JP6708858B2; JP2020022280A

Abstract

A synchronous motor (10) is provided with: a rotor (11) which is rotatable around a rotating shaft (10A); a housing (13)(stator) disposed around the rotating shaft (10A); a first assembly (12)(first field magnet) which causes generation of a magnetic field (12D) in the rotor (11); a second assembly (14)(second field magnet) which is disposed around the rotating shaft (10A) in the housing (13) and causes generation of a magnetic field (14D) separately from the first assembly (12); and a third assembly (15)(exciting body) which causes generation of a varying magnetic field for providing the first assembly (12) with an angular momentum that causes rotation of the rotor (11). One of the magnetic field (12D) due to the first assembly (12) and the magnetic field (14D) due to the second assembly (14) has a magnetic field line (12E) in a direction along the circumference of the rotating shaft (10A), and the other has a magnetic field line (14E) in a direction along a moving radius direction toward the rotating shaft (10A).

Description

Synchronous motor and motor assembly

The present disclosure relates to a synchronous motor and a motor assembly including the synchronous motor.

Synchronous motors provide a rotor with a field that can rotate around a single axis of rotation and provide a field. The field follows a fluctuating magnetic field that is applied from outside the rotor. Motor that realizes. Various techniques have been developed for this synchronous motor (see, for example, JP-A-54-0556114).

Generally, synchronous motors have a disadvantage that it is difficult to start rotating a stopped rotor by itself at the time of starting. This disadvantage can be solved by, for example, incorporating a motor of a type different from that of the synchronous motor as a starting motor into a motor assembly having a synchronous motor. However, in this case, there is a new disadvantage that electric energy for driving the starting motor is additionally required.

Therefore, there is a need for an improved synchronous motor.

The present disclosure relates to a rotor capable of rotational movement rotating around one rotation axis, a stator disposed around the rotation axis, and a first field for generating a magnetic field in a state provided in the rotor. A first magnetic field, a second magnetic field provided around the rotation axis in the stator and generating a magnetic field separately from the first magnetic field, and a second magnetic field for rotating the rotor by the first magnetic field. And a magnetic field generated by the first field and the magnetic field generated by the second field, in which one of the magnetic field lines extends in the circumferential direction of the rotation axis. And a synchronous motor having the magnetic field lines in the direction along the radial direction toward the rotation axis.

では In the synchronous motor, when the rotor is stationary, the first field is in a magnetically unstable balance state. At this time, if the magnetic field generated by the exciter is changed, the change becomes a perturbation that breaks the above-described balanced state, and serves as a trigger that gives angular momentum for rotating the rotor to the first field. As a result, the rotor stopped in the synchronous motor can be easily moved, and the electric energy required for starting the synchronous motor can be reduced.

In the synchronous motor, when the rotor is rotating, each of the magnetic fields of the first field and the second field generates a force having a component in a direction of moving the stator and the rotor away from each other. As a result, it is possible to reduce the amount of electric energy required for driving the synchronous motor by reducing the catch of the rotating rotor in the synchronous motor.

In one preferred embodiment, the stator is arranged around the rotor and the first field is a first assembly having a plurality of magnets arranged around the axis of rotation in the rotor. , The second field is a second assembly having a plurality of magnets arranged around the rotor in the stator, and the exciter is disposed in the stator between the magnets of the second assembly. A third assembly having a plurality of electromagnets, wherein the first assembly generates a magnetic field having lines of magnetic force in a direction along the circumferential direction of the rotation shaft, and the second assembly generates a magnetic field in the direction along the radial direction. A magnetic field having

In this case, the electric wiring for supplying electric energy to the electromagnet can be simplified as compared with a synchronous motor in which the rotor is arranged around the stator.

In the above embodiment, the number of magnets in the first assembly is preferably equal to the number of magnets in the second assembly.

In this case, since the magnets in the first assembly and the magnets in the second assembly can be associated with each other on a one-to-one basis, the pattern of the fluctuating magnetic field generated by each electromagnet for giving the perturbation should be simplified. Can be.

Alternatively, in the above embodiment, the number of magnets in the first assembly is smaller than the number of magnets in the second assembly, and is relatively prime to the number of magnets in the second assembly. preferable.

In this case, it is possible to reduce the possibility that the magnets of the first assembly will be in a stable balanced state, make the rotor easier to move, and reduce the electric energy required when starting the synchronous motor.

More preferably, the number of magnets in the first assembly is one less than the number of magnets in the second assembly.

In this case, the output of the synchronous motor can be maintained at a large value by increasing the number of magnets of the first assembly to which the angular momentum for rotating the rotor is given as much as possible, while securing the above-described effects.

In the above embodiment, each magnet in the second assembly has at least one of the S pole and the N pole formed in a planar shape, and the magnetic pole formed in the planar shape faces the rotor side. What is arrange | positioned like this is preferable.

In this case, when the distance between the electromagnet and the magnet of the first assembly is relatively short, the distance between the magnet and the magnet of the second assembly from the magnetic pole is relatively long. Thereby, when the magnet of the first assembly is attracted to the magnetic field of the electromagnet, the influence of the magnetic field of the magnet of the second assembly on the attraction can be reduced.

More preferably, in each magnet in the second assembly, the magnetic pole on the rotor side is unified to one of the S pole and the N pole.

In this case, it is avoided that the lines of magnetic force emitted from the respective magnets in the second assembly are concentrated between these magnets, and the effect of causing the respective magnets of the first assembly to be in a magnetically unstable balance state is weakened. can do.

In the above embodiment, it is preferable that the magnets in the first assembly are arranged such that the directions of the magnetic poles as viewed in the circumferential direction of the rotating shaft are unified.

In this case, the magnetic field of the first assembly surrounding the rotor eliminates the constriction of the lines of magnetic force, thereby reducing the possibility that the constriction and the magnetic field of the electromagnet interfere with each other to reduce the rotational motion of the rotor.

In another embodiment, the present disclosure includes a motor assembly comprising a plurality of any of the synchronous motors described above.

More specifically, the plurality of synchronous motors include a first motor and a second motor sharing one shaft as a rotation axis, and each magnet of the first assembly in the first motor, and The magnets of the first assembly of the second motor are fixed so that the first amount, which is the amount of misalignment seen in the circumferential direction of the shaft, does not change, and the magnets of the second assembly of the first motor are different. , And each magnet of the second assembly in the second motor is fixed so that a second amount, which is the amount of displacement in the circumferential direction of the shaft, does not change, and the second amount is the first amount. The amount is set to be different from the amount.

In the motor assembly, the phase between the rotation phase of the first assembly as viewed from the second assembly in the first motor and the rotation phase of the first assembly as viewed from the second assembly in the second motor. Deviation can be set. This phase shift occurs when one of the magnets of the first assembly in the first motor and the magnets of the first assembly in the second motor is in a stable balanced state, and the other is not in a balanced state. It is something that can be done. Therefore, it is possible to prevent both the first assembly of the first motor and the first assembly of the second motor from being in a stable balance state, and to easily rotate each rotor and the shaft.

FIG. 3 is an explanatory diagram illustrating a usage state of the synchronous motor 10 according to one embodiment. FIG. 2 is an end view taken along line II-II of FIG. 1. FIG. 9 is an explanatory diagram showing a usage state of a synchronous motor 30 according to another embodiment. FIG. 4 is an end view taken along line IV-IV of FIG. 3. FIG. 4 is an explanatory diagram illustrating a use state of the motor assembly 100 according to one embodiment. FIG. 6 is an end view taken along line VI-VI of FIG. 5. FIG. 7 is an end view taken along line VII-VII of FIG. 5.

<First embodiment>
First, the configuration of the synchronous motor 10 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the synchronous motor 10 rotates the shaft 10B by receiving supply of electric energy from a power supply device 20. Here, the power supply device 20 can output both an AC current and a DC current, and outputs a waveform of the output current, for example, an arbitrary waveform including a sine wave, a triangular wave, a rectangular wave, and a pulse wave. The waveform can be set as follows.

As shown in FIG. 2, the synchronous motor 10 includes a shaft 10B, a rotor 11 for rotating the shaft 10B, and a housing 13 disposed around the rotor 11. The rotor 11 is integrated with the shaft 10B by a spline fit, so that the rotor 11 can rotate around the rotation axis 10A with the axis of the shaft 10B as the rotation axis 10A. The outer surface of the housing 13 is formed in a columnar shape, and supports the shaft 10 </ b> B while the rotor 11 is housed inside.

The housing 13 is formed by projecting five salient poles 13A and five salient poles 13B having different shapes from the inner surface of the metal cylinder toward the inner side of the cylinder (in FIG. 2, toward the rotation axis 10A). Having a configuration.

Each of the five salient poles 13A is a rectangular parallelepiped inner peripheral rib extending in a height direction (a direction perpendicular to the paper surface in FIG. 2) of the cylinder of the housing 13, and is spaced from each other on the inner surface of the cylinder of the housing 13. Are arranged at equal intervals. These salient poles 13A protrude toward the inner side of the cylinder of the housing 13 (the side facing the rotation axis 10A in FIG. 2), and each protruding tip surface is a regular pentagonal prism having the rotation axis 10A as a central axis. It is a plane which makes each side of the.

The five salient poles 13B are plate-shaped inner peripheral ribs each extending in the height direction (the direction perpendicular to the paper surface in FIG. 2) of the cylinder of the housing 13, and are set between the five salient poles 13A. One piece is arranged in each gap. These salient poles 13A protrude toward the inner side of the cylinder of the housing 13 (the side toward the rotating shaft 10A in FIG. 2) longer than the protruding amount of the salient poles 13A, and each protruding tip end surface is protruded. , And are hollowed out so as to form a cylindrical surface with the rotation axis 10A as a central axis.

The rotor 11 has five dovetail grooves 11A extending in the height direction of the cylinder (the direction perpendicular to the paper in FIG. 2) on the outer surface of the metal cylinder to which the spline is fitted to the shaft 10B. The five dovetail grooves 11A are cut so that the intervals between them are equal. Five magnets 12A (specifically, for example, neodymium magnets) are attached to these dovetail grooves 11A one by one. Each of the magnets 12A has a shape corresponding to the dovetail groove 11A, and is fitted over the entire length of the dovetail groove 11A so as not to be separated from the dovetail groove 11A. Here, the dovetail groove is a groove with a configuration in which the width of the opening is made narrower than the width of the bottom part by making the wall part beveled. It refers to a plate-like portion that can slide into the dovetail groove from the direction in which the dovetail groove extends and fit therewith.

Accordingly, the five magnets 12A form an assembly (hereinafter, also referred to as “first assembly 12”) arranged so as to surround the rotation axis 10A in the rotor 11. In addition, each end surface of the five magnets 12A is a surface that is rounded so as to form a cylindrical surface around the rotation shaft 10A so as not to come into contact with the housing 13 and the components provided in the housing 13. ing.

Here, each magnet 12A of the first assembly 12 has an N pole 12B on one side (counterclockwise in FIG. 2) as viewed in the circumferential direction of the rotating shaft 10A, and the other side (FIG. 2). The surface on the clockwise side is the S pole 12C. Thereby, the first assembly 12 exhibits a function as a field for generating a magnetic field 12D having the magnetic lines of force 12E in the direction along the circumferential direction of the rotating shaft 10A. In other words, the first assembly 12 exhibits a function as a “first field” in the present disclosure. Further, the magnets 12A in the first assembly 12 are arranged in a state where the directions of the magnetic poles viewed in the circumferential direction of the rotating shaft 10A are unified.

Five magnets 14A (specifically, for example, neodymium magnets) each formed in a rectangular parallelepiped plate shape are attached to each end face of the five salient poles 13A. These magnets 14A are magnetized in the thickness direction of the flat plate, and have an S pole 14C and an N pole 14B. The S pole 14C, which appears on one plate surface of the flat plate, covers the entire end surface of the salient pole 13A, and the N pole 14B, which appears on one plate surface of the flat plate, faces the rotor 11 side.

Each of the five salient poles 13B is provided with an electromagnet 15A formed of a solenoid coil wound around the distal end, respectively. These electromagnets 15A receive a current output from the power supply device 20 (see FIG. 1) and generate a fluctuating magnetic field or a steady magnetic field corresponding to the waveform of the current. Here, the magnetic field generated by each electromagnet 15A can have a strength capable of attracting or retreating the magnet 12A of the first assembly 12 by magnetic force.

により With the above configuration, the housing 13 surrounds the rotor 11 and the rotation shaft 10A, and functions as a stator. The five magnets 14A form an assembly (hereinafter, also referred to as “second assembly 14”) arranged so as to surround the rotor 11 in the housing 13 functioning as a stator. Further, the second assembly 14 exerts a function as a field for generating a magnetic field 14D having magnetic lines of force 14E extending in a radial direction toward the rotation axis 10A. In other words, the second assembly 14 functions as a “second field” in the present disclosure.

Further, the five electromagnets 15A attached to the five salient poles 13B are arranged one by one between the magnets 14A of the second assembly 14 in the housing 13 functioning as a stator, and the assembly (hereinafter referred to as “third electromagnet”). Assembly 15 "). Further, the third assembly 15 receives a current output from the power supply device 20 (see FIG. 1) and functions as an exciter that generates a fluctuating magnetic field that gives the first assembly 12 an angular momentum for rotating the rotor 11. Demonstrate.

According to each configuration described above, one of the magnetic field 12D generated by the first assembly 12 and the magnetic field 14D generated by the second assembly 14 has the magnetic force line 12E in the direction along the circumferential direction of the rotation shaft 10A. The other has a magnetic line of force 14E extending in the radial direction toward the rotation axis 10A. Therefore, when the rotor 11 is stationary, the magnets 12A of the first assembly 12 are in a magnetically unstable balance state. At this time, if the magnetic field generated by the electromagnet 15A fluctuates, this fluctuation becomes a perturbation that breaks the above-described balanced state, and serves as a trigger that gives the angular momentum for rotating the rotor 11 to the magnet 12A of the first assembly 12. Thus, the rotor 11 stopped in the synchronous motor 10 can be easily moved, and the electric energy required for starting the synchronous motor 10 can be reduced.

Further, according to each of the above-described configurations, when the rotor 11 is rotating, the components of the

magnetic fields

12D and 14D of the first assembly 12 and the second assembly 14 move the housing 13 and the rotor 11 away from each other. To generate a force having Accordingly, it is possible to reduce the amount of electric energy required for driving the synchronous motor 10 by reducing the catch of the rotating rotor 11 in the synchronous motor 10.

Further, since the housing 13 provided with the electromagnet 15A of the third assembly 15 and functioning as a stator is disposed around the rotor 11 to be rotated, the rotor is disposed around the stator. The electric wiring for supplying electric energy to the electromagnet 15A can be simplified as compared with the synchronous motor (not shown) of the embodiment. However, the present disclosure includes a synchronous motor in which the rotor is arranged around the stator.

Further, the number (5) of the magnets 12A in the first assembly 12 is equal to the number (5) of the magnets 14A in the second assembly 14, and these magnets 12A and the magnets 14A can be associated one-to-one. Therefore, the pattern of the fluctuating magnetic field generated by each electromagnet 15A for giving the perturbation can be simplified.

磁石 Further, each magnet 14A in the second assembly 14 is arranged with its planar magnetic pole facing the rotor 11, and an electromagnet 15A is arranged between these magnets 14A. Therefore, when the distance between the electromagnet 15A and the magnet 12A of the first assembly 12 is relatively short, the distance between the magnet 12A and the magnet 14A of the second assembly 14 from the magnetic pole is relatively long. Thus, when the magnet 12A of the first assembly 12 is attracted to the magnetic field of the electromagnet 15A, the influence of the magnetic field 14D of the magnet 14A of the second assembly 14 on the attraction can be reduced.

Further, in each magnet 14A of the second assembly 14, the magnetic poles on the rotor 11 side are unified to the N pole 14B, so that the lines of magnetic force 14E coming from each magnet 14A are concentrated between the magnets 14A, and the first assembly 12 It can be avoided that the effect of bringing each magnet 12A into an unstable balance state when viewed magnetically is weakened. In each of the magnets in the second assembly, a synchronous motor (not shown) in which the rotor-side magnetic pole is unified to the S pole has the same effect, and the present disclosure relates to such a synchronous motor. Includes motor.

In the synchronous motor 10, the magnets 12A of the first assembly 12 are arranged such that the magnetic poles viewed in the circumferential direction of the rotating shaft 10A are unified. Therefore, the magnetic field 12D of the first assembly 12 surrounding the rotor 11 eliminates the constriction of the lines of magnetic force, and the possibility that the constriction and the magnetic field of the electromagnet 15A interfere with each other to reduce the rotational motion of the rotor 11 can be reduced.

<Second embodiment>
Next, a configuration of a synchronous motor 30 according to a second embodiment will be described with reference to FIGS. The synchronous motor 30 is an embodiment in which the synchronous motor 10 according to the first embodiment is modified. Therefore, the components common to the components used in the description of the synchronous motor 10 are denoted by the reference numerals obtained by adding “20” to the components used in the description of the synchronous motor 10. Corresponding, detailed description is omitted.

As shown in FIG. 3, the synchronous motor 30 is a synchronous motor 10 according to the first embodiment (see FIG. 3) except that the rotating shaft 30B is thicker than the shaft 10B (see FIG. 1). 1).

As shown in FIG. 4, the synchronous motor 30 has a four-groove Geneva gear connected to the shaft 30B in a metallurgical manner, instead of the rotor 11 (see FIG. 2) configured to be spline-fitted to the shaft 10B. It has a rotor 31 that is legally integrated. Each of the four grooves 31A of the rotor 31 is provided with one of four magnets 32A formed in a plate shape. One side (counterclockwise in FIG. 4) of the magnet 32A viewed in the circumferential direction of the rotating shaft 30A is an N pole 32B, and the other side (clockwise in FIG. 4) is an S pole. 32C.

Accordingly, the first assembly 32 exerts a function as a field for generating a magnetic field 32D having the magnetic lines of force 32E along the circumferential direction of the rotation shaft 30A. In other words, the first assembly 32 exhibits a function as a “first field” in the present disclosure. Further, the magnets 32A in the first assembly 32 are arranged in a state where the magnetic poles viewed in the circumferential direction of the rotation shaft 30A are unified.

According to each configuration described above, the number (4) of the magnets 32A in the first assembly 32 is smaller than the number (5) of the magnets 34A in the second assembly 34, and the number (5) is smaller than the number (5). Be disjointed. For this reason, it is possible to reduce the possibility that each magnet 32A of the first assembly 32 will be in a stable balanced state, make the rotor 31 easy to move, and reduce the electric energy required at the time of starting the synchronous motor 30. Becomes

Here, the number (4) of the magnets 32A in the first assembly 32 is also a number that satisfies the relation that the number (5) of the magnets 34A in the second assembly 34 is smaller by one. For this reason, while securing the effect of the synchronous motor 30, the number of magnets 32A of the first assembly 32 to which the angular momentum for rotating the rotor 31 is given is increased as much as possible, and the output of the synchronous motor 30 is increased. Can be kept at a large value.

Next, the configuration of a motor assembly 100 according to a third embodiment will be described with reference to FIGS. The motor assembly 100 includes a first motor 110 and a second motor 120 which are modifications of the synchronous motor 10 according to the first embodiment. Therefore, among the configurations of the first motor 110, the configurations common to the configurations used in the description of the synchronous motor 10 are denoted by the reference numerals assigned to the configurations used in the description of the synchronous motor 10. The reference numerals added with “100” are assigned to correspond, and the detailed description thereof is omitted. In addition, among the configurations of the second motor 120, the configurations common to the configurations used in the description of the synchronous motor 10 are denoted by the reference numerals assigned to the configurations used in the description of the synchronous motor 10. The reference numerals added with “110” are assigned to correspond, and the detailed description thereof is omitted.

As shown in FIG. 5, the first motor 110 and the second motor 120 share a shaft 101 which is an object forming the rotation axis 100A. The shaft 101 is a spline shaft in which one spline 101A extending linearly over the entire length is cut.

6 and 7, the rotor 111 of the first motor 110 and the rotor 121 of the second motor 120 are integrated with the shaft 101 by spline fitting. Thus, each magnet 112A of the first assembly 112 of the first motor 110 and each magnet 122A of the first assembly 122 of the second motor 120 cause the amount of displacement of the shaft 101 as viewed in the circumferential direction. Is fixed so as not to change.

The first motor 110 and the second motor 120 share the power supply device 102 that functions as a source of electric energy, as shown in FIG. The power supply device 102 can output both an AC current and a DC current to each of the first motor 110 and the second motor 120, and outputs a waveform of the output current. For example, any waveform including a sine wave, a triangular wave, a rectangular wave, and a pulse wave can be set.

Here, on the upper surface of the power supply device 102, there is provided a recess 102A extending in parallel with the direction in which the axis of the shaft 101 extends (the left-right direction in FIG. 5). As shown in FIGS. 6 and 7, the housing 113 of the first motor 110 and the housing 123 of the second motor 120 are attached to the outer surfaces of the cylinders of the

housings

113 and 123 in the height direction of the cylinder. (In FIGS. 6 and 7, the

dovetail grooves

113C and 123C are provided one by one.

These dovetail

grooves

113C and 123C are formed in a shape and a size corresponding to the shape 102A of the power supply device 102, and the housing 113 of the first motor 110 and the housing 123 of the second motor 120 are formed by the shape 102A. The slidable engagement in the extending direction (the left-right direction in FIG. 5) is realized. As a result, each magnet 114A of the second assembly 114 of the first motor 110 and each magnet 124A of the second assembly 124 of the second motor 120 cause the amount of displacement of the shaft 101 as viewed in the circumferential direction. Is fixed so as not to change. The second amount (36 ° in FIGS. 6 and 7) is set to be different from the first amount (0 ° in FIGS. 6 and 7).

According to each configuration described above, the rotation phase of the first assembly 112 as viewed from the second assembly 114 in the first motor 110 and the first assembly as viewed from the second assembly 124 in the second motor 120 A phase shift can be set between the rotation phase and the rotation phase of the motor 122. This phase shift occurs when one of the magnets 112A of the first assembly 112 of the first motor 110 and the magnets 122A of the first assembly 122 of the second motor 120 is in a stable balance state. It is possible to prevent the other from being in a balanced state. Therefore, it is possible to avoid a situation where both the first assembly 112 of the first motor 110 and the first assembly 122 of the second motor 120 are in a stable equilibrium state, and connect the

rotors

111 and 121 with the shaft 101. It can be easily rotated.

The rotor 111 of the first motor 110 and the rotor 121 of the second motor 120 are slidable along the shaft 101 by fitting the spline to the shaft 101. Further, the housing 113 of the first motor 110 and the housing 123 of the second motor 120 are slidable along a recess 102A parallel to the shaft 101. As a result, the positions of the first motor 110 and the second motor 120 in the motor assembly 100 are changed by sliding the first motor 110 and the second motor 120 in the direction along the shaft 101 and the groove 102A. (See FIG. 5).

The description has been made above with reference to the first to third embodiments. However, it will be apparent to those skilled in the art that various substitutions, modifications, and changes can be made without departing from the purpose of the present disclosure. That is, the modes for carrying out the present disclosure can include all substitutions, modifications, and changes that do not depart from the spirit and purpose of the claims appended hereto. For example, the following various modes can be implemented.

(1) A synchronous motor in which a rotor surrounds a stator and forms at least a part of a housing, and the rotor rotates around a center axis of the stator as a rotation axis. The synchronous motor of this embodiment can be applied to, for example, a rotating display stand that displays small hobby products while rotating them.

(2) Each magnet of the second assembly for generating a magnetic field having a magnetic field line in the radial direction toward the rotation axis is provided in the rotor as a first field, and the magnetic field lines in the direction along the circumferential direction of the rotation axis. A synchronous motor in which each magnet of the first assembly for generating a magnetic field having a second field is provided on a stator.

(3) A synchronous motor having a stator in which each assembly for generating a magnetic field is embedded in place of a stator having a configuration in which a plurality of salient poles project from the inner surface of a metal cylinder.

(4) A synchronous motor in which each of the electromagnets forming the third assembly is provided on a rotor or a mounting part other than the rotor or the stator.

(5) The number of magnets forming the first assembly, the number of magnets forming the second assembly, and the number of electromagnets forming the third assembly are respectively changed to arbitrarily set numbers. Synchronous motor in form.

(6) A motor assembly in which a motor different from the first motor 110 and the second motor 120 is added to the motor assembly 100 according to the third embodiment described above. In this embodiment, the added motor may share a shaft with the first motor and the second motor, or may rotate another shaft.

Claims

A rotor capable of rotating around one rotation axis,
A stator arranged around the rotation axis;
A first field for generating a magnetic field in a state provided in the rotor;
A second field which is provided in a state surrounding the rotation axis in the stator and generates a magnetic field separately from the first field;
An exciter that generates a fluctuating magnetic field that gives an angular momentum for rotating the rotor to the first field;
With
One of the magnetic field generated by the first field and the magnetic field generated by the second field has a magnetic field line in a direction along a circumferential direction of the rotation axis, and the other is directed to the rotation axis. Having magnetic lines of force in the direction along the radial direction,
Synchronous motor.
The synchronous motor according to claim 1,
The stator is arranged around the rotor,
The first field is a first assembly having a plurality of magnets arranged around the rotation axis in the rotor;
The second field is a second assembly having a plurality of magnets arranged around the rotor in the stator;
The exciter is a third assembly having a plurality of electromagnets disposed between the magnets of the second assembly in the stator,
The first assembly generates a magnetic field having magnetic lines of force in a direction along a circumferential direction of the rotation axis,
The second assembly generates a magnetic field having magnetic lines of force in a direction along the radial direction,
Synchronous motor.
A synchronous motor according to claim 2,
The number of magnets in the first assembly is equal to the number of magnets in the second assembly;
Synchronous motor.
A synchronous motor according to claim 2,
The number of magnets in the first assembly is less than the number of magnets in the second assembly and is relatively prime to the number of magnets in the second assembly.
Synchronous motor.
A synchronous motor according to claim 4,
The number of magnets in the first assembly is one less than the number of magnets in the second assembly;
Synchronous motor.
A synchronous motor according to any one of claims 2 to 5, wherein
Each magnet in the second assembly is configured such that at least one magnetic pole of the S pole or the N pole is formed in a planar shape, and the magnetic pole formed in the planar shape is arranged so as to face the rotor side. Yes,
Synchronous motor.
A synchronous motor according to claim 6,
In each magnet in the second assembly, the magnetic pole on the rotor side is unified to one of an S pole and an N pole,
Synchronous motor.
A synchronous motor according to any one of claims 2 to 7, wherein:
Each magnet in the first assembly is arranged in a state where the directions of magnetic poles viewed in the circumferential direction of the rotation axis are unified.
Synchronous motor.
A motor assembly comprising a plurality of synchronous motors according to any one of claims 2 to 8, wherein:
The plurality of synchronous motors include a first motor and a second motor sharing one shaft as the rotation axis,
Each of the magnets of the first assembly in the first motor and each of the magnets of the first assembly in the second motor have a first position, which is an amount of displacement in the circumferential direction of the shaft. Fixed so that the amount does not change,
The magnets of the second assembly in the first motor and the magnets of the second assembly in the second motor each have a second position, which is the amount of positional deviation seen in the circumferential direction of the shaft. Fixed so that the amount does not change,
The second amount is set to be different from the first amount,
Motor assembly.