JP6388611B2 - Hybrid field double gap synchronous machine - Google Patents

Description

  The present invention relates to a hybrid field double gap synchronous machine that generates a main magnetic flux as a field magnetic flux using both a permanent magnet and an electromagnet.

  Conventionally, as a synchronous machine, a permanent magnet type synchronous machine that generates a main magnetic flux using a permanent magnet and an electromagnet type synchronous machine that generates a main magnetic flux using a field winding are known. As an electromagnetic synchronous machine, a rotor in which a field winding is attached to a magnetic pole of a rotor and a field winding is attached to a stator, and a magnetomotive force generated by the field winding is a reluctance rotor. It is known that the main magnetic flux is generated by modulation with the salient poles (see, for example, Patent Document 1).

  Since the permanent magnet type synchronous machine has no excitation input (excitation loss), it is possible to obtain higher efficiency than the electromagnet type synchronous machine. Further, when a permanent magnet having a high magnetic flux density is used, it is possible to increase the torque, weight and size of the circular magnet type synchronous machine. Therefore, permanent magnet type synchronous machines are used in various fields such as industrial motors, consumer equipment motors, and in-vehicle motors. On the other hand, in the electromagnetic synchronous machine, the main magnetic flux can be easily adjusted by the direct current flowing in the field winding, so that the operating range as an electric motor or generator is widened compared with the permanent magnet synchronous machine. Can do. Therefore, the electromagnetic synchronous machine is used for an alternator that is an on-vehicle generator.

Japanese Patent No. 5778391

  However, in the permanent magnet type synchronous machine, the main magnetic flux is kept almost constant depending on the characteristics of the permanent magnet, so that the counter electromotive force generated in the armature winding, that is, the induced electromotive force changes with the rotation speed. Therefore, in the constant output operation when the permanent magnet type synchronous machine is used as an electric motor, or in the constant voltage operation when the permanent magnet type synchronous machine is used as a generator, the operating range is compared with the electromagnetic synchronous machine. There was a problem that was limited. On the other hand, the electromagnetic synchronous machine has a problem that the magnetic flux density is lower than the magnetic flux density of the permanent magnet synchronous machine, so that a higher torque cannot be achieved as compared with the permanent magnet synchronous machine. In addition, when a permanent magnet type synchronous machine and an electromagnetic type synchronous machine are combined, each of the permanent magnet type synchronous machine and the electromagnetic type synchronous machine must be driven by separate inverters, thereby reducing the size of the entire system. There was a problem that it was not possible.

  The present invention provides a hybrid field type double gap synchronous machine that can widen the operating range, increase the torque, and reduce the size of the entire system.

A hybrid field type double gap synchronous machine according to the present invention includes a permanent magnet type drive unit and an electromagnet type drive unit provided on the inner side or the outer side in the radial direction of the permanent magnet type drive unit. And a magnetic field type double gap synchronous machine in which two gaps are formed in a radial direction apart by an electromagnetic drive unit, wherein the permanent magnet drive unit includes a multiphase first armature winding. A stator for a magnet type drive unit and a rotor for a permanent magnet type drive unit provided opposite to the stator for a permanent magnet type drive unit, and the electromagnet type drive unit is a multi-phase second armature winding an electromagnet drive part for stator including a line and field winding, is provided to face the electromagnet drive part for stator, and a rotor electromagnet drive part including a plurality of salient poles, butt The number of poles and the number of pole pairs of the rotor for the permanent magnet drive unit are The pole pairs of the second armature winding pa, and pf the pole pairs of the field winding, when the pa ≠ pf, | pa ± pf | a.

  According to the hybrid field type double gap synchronous machine according to the present invention, the permanent magnet type driving unit and the permanent magnet type driving unit provided on the inner side or the outer side in the radial direction than the permanent magnet type driving unit are provided. Since the two gaps are formed in the radial direction by the motor-type drive unit and the electromagnet-type drive unit, the operating range can be expanded, the torque can be increased, and the entire system can be reduced in size. it can.

It is sectional drawing which shows the principal part of the hybrid field type double gap synchronous machine which concerns on Embodiment 1 of this invention. It is a figure which shows the whole system including the drive circuit which supplies electric power to the permanent magnet type drive part and electromagnet type drive part of FIG. It is a graph which shows the back electromotive force induced | guided | derived to the inner side armature winding and the outer side armature winding in the hybrid field type double gap synchronous machine of FIG. It is a graph which shows the torque with respect to q-axis current in the hybrid field type double gap synchronous machine of FIG. It is sectional drawing which shows the principal part of the hybrid field type double gap synchronous machine which concerns on Embodiment 2 of this invention. It is sectional drawing which shows the principal part of the hybrid field type double gap synchronous machine which concerns on Embodiment 3 of this invention. It is sectional drawing which shows the principal part of the hybrid field type double gap synchronous machine which concerns on Embodiment 4 of this invention. It is sectional drawing which shows the principal part of the hybrid field type double gap synchronous machine which concerns on Embodiment 5 of this invention.

Embodiment 1 FIG.
1 is a cross-sectional view showing a main part of a hybrid field type double gap synchronous machine according to Embodiment 1 of the present invention. The hybrid field type double gap synchronous machine includes a permanent magnet type drive unit 1 and an electromagnet type drive unit 2 provided on the outer side in the radial direction than the permanent magnet type drive unit 1. Two gaps are formed in the radial direction by the electromagnet drive unit 2. Of the two gaps, a gap arranged radially inside is referred to as an inner gap 3a, and a gap arranged radially outside of the inner gap 3a is referred to as an outer gap 3b.

  The permanent magnet type drive unit 1 includes an inner stator 11 that is a stator for a permanent magnet type drive unit, and an inner rotor 12 that is a rotor for a permanent magnet type drive unit provided facing the inner stator 11. have. The inner stator 11 is disposed on the outer side in the radial direction than the inner rotor 12. The inner gap 3 a is formed between the inner stator 11 and the inner rotor 12.

  The electromagnet type drive unit 2 includes an outer stator 21 that is an electromagnet type drive unit stator, and an outer rotor 22 that is an electromagnet type drive unit rotor provided to face the outer stator 21. ing. The outer stator 21 is disposed radially inward of the outer rotor 22. The outer gap 3 b is formed between the outer stator 21 and the outer rotor 22.

  The inner stator 11 includes a stator core 113 having a core back 111 and 36 teeth 112 extending radially inward from the core back 111, and an inner armature that is a first armature winding wound around the teeth 112. Winding 114 is provided. The inner armature winding 114 is a three-phase armature winding. The teeth 112 are arranged at equal intervals in the circumferential direction.

  The outer stator 21 includes a stator core 213 having a core back 211 and 18 teeth 212 extending radially outward from the core back 211, and an outer armature that is a second armature winding wound around the teeth 212. A winding 214 and a field winding 215 wound around the tooth 212 are provided.

  The core back 111 and the core back 211 are integrally formed. In other words, the stator core 113 and the stator core 213 are integrally formed. A combination of the stator core 113 and the stator core 213 is referred to as a shared stator core 4.

  The inner rotor 12 includes a rotor core 121 and a plurality of permanent magnets 122 that are fixed to the rotor core 121 and face the radially inner side surface of the inner stator 11. The permanent magnet 122 serves as a main magnetic flux generation source (field pole) of the permanent magnet drive unit 1. The permanent magnet 122 is composed of a neodymium sintered magnet. The permanent magnet 122 is not limited to a neodymium sintered magnet, and may be composed of other materials.

  The outer rotor 22 has an annular base 221 and a plurality of salient poles 222 extending radially inward from the base 221. The salient pole 222 faces the radially outer surface of the outer stator 21. The plurality of salient poles 222 are arranged at equal intervals in the circumferential direction. The salient pole 222 is used to generate the main magnetic flux of the electromagnetic drive unit 2. The inner rotor 12 and the outer rotor 22 are mechanically coupled. A rotating shaft (not shown) is fixed to the inner rotor 12. The rotating shaft is rotatably supported by a housing (not shown) via a bearing (not shown).

  In the first embodiment, the outer diameter of the outer rotor 22 is 200 mm, the outer diameter of the outer stator 21 is 176 mm, the outer diameter of the inner rotor 12 is 95.2 mm, the gap length of the outer gap 3b is 0.3 mm, The gap length of the gap 3a is 0.4 mm.

  Each of the shared stator core 4, the rotor core 121, and the outer rotor 22 is configured by laminating a plurality of electromagnetic steel plates in the axial direction of the rotation shaft. The axial length of each of the shared stator core 4, the rotor core 121, and the outer rotor 22 is 50 mm. The shared stator iron core 4, the rotor iron core 121, and the outer rotor 22 may be configured by laminating a dust core material or other magnetic material instead of the magnetic steel sheet, and may be configured of a bulk material. May be.

  The number of poles 2pa of the outer armature winding 214 is 12 poles. In other words, the number of pole pairs pa of the outer armature winding 214 is 6. The outer armature winding 214 has 132 turns per phase.

  The number of poles 2pf of the field winding 215 is 18 poles. In other words, the number of pole pairs pf of the field winding 215 is 9. The field winding 215 has 1260 turns.

  The number pr of salient poles of the outer rotor 22 is pa + pf. In this example, the number pr of salient poles of the outer rotor 22 is 15 poles.

  The number of pole pairs of the inner armature winding 114 is pa + pf. In this example, the number of pole pairs of the inner armature winding 114 is 15. Therefore, the number of pole pairs of the permanent magnet 122 that is the number of pole pairs of the inner rotor 12 is also 15. That is, the number pr of salient poles of the outer rotor 22, the number of pole pairs of the inner armature winding 114, and the number of pole pairs of the permanent magnet 122 are the same. The inner armature winding 114 has 108 turns per phase.

  FIG. 2 is a diagram showing an overall system including a drive circuit for supplying electric power to the permanent magnet drive unit 1 and the electromagnet drive unit 2 of FIG. A field current If is supplied from the DC power supply 31 to the field winding 215.

  In the first embodiment, the outer armature winding 214 and the inner armature winding 114 are connected in series with each other by Y connection. The armature current is supplied to the outer armature winding 214 and the inner armature winding 114 from the inverter circuit 33 to which the three-phase AC power supply 32 is connected. The outer armature winding 214 and the inner armature winding 114 are arranged so that the flux linkage waveform is in phase with respect to changes in the position of the outer rotor 22 and the position of the inner rotor 12. That is, the outer armature winding 214 and the inner armature winding 114 are arranged so that the other induced voltage becomes the U-phase peak at the moment when one induced voltage becomes the U-phase peak.

  In FIG. 1, the outer armature winding 214 and the inner armature winding 114 are arranged so that the same phase is aligned in the radial direction, but the permanent magnet type driving unit 1 and the electromagnet type driving unit 2 respectively. When the positional relationship between the armature and the rotor does not change, the positional relationship in the circumferential direction between the permanent magnet type driving unit 1 and the electromagnet type driving unit 2 is arbitrarily good.

  In the first embodiment, since the core back 111 and the core back 211 are integrally formed, the magnetic flux density of the core back 111 and the core back 211, that is, the permanent magnet type driving unit 1 and the electromagnet type driving unit 2 are used. The total density of the magnetic fluxes is reduced, but it is desirable that the permanent magnet drive unit 1 and the electromagnet drive unit 2 have a circumferential positional relationship so that the effect is increased. The obtained effect depends on the combination of the slot combination of the permanent magnet drive unit 1, the number of pole pairs pa of the outer armature winding 214, and the number of pole pairs pf of the field winding 215.

For example, in FIG. 1, the outer armature winding 214 and the inner armature winding 114 are arranged so that their phases are aligned in the radial direction (U + and U− are arranged on the inner side in the radial direction of U _0. The same applies to V ₀ and W ₀ ). By shifting in the circumferential direction by one tooth 212, W + and W− are arranged inside U ₀ , resulting in a combination of different phases. (The same applies to V ₀ and W ₀ ). For this reason, since the magnetic fluxes of the teeth 212 of the outer stator 21 and the teeth 112 of the inner stator 11 are not simultaneously maximized, the magnetic flux density of the core back 111 and the core back 211 can be reduced.

  By making the interlinkage magnetic flux waveform in phase, the permanent magnet 122 necessary to maximize the combined value of the back electromotive force induced in the outer armature winding 214 and the inner armature winding 114 and obtain a desired torque. The amount of is reduced. If the purpose is to reduce cogging or ripple instead of maximizing the composite value of the counter electromotive force, the phase may be shifted from the same phase. The outer armature winding 214 and the field winding 215 are wound in the same slot but minimize the total amount of copper loss generated by changing the ratio of the two winding cross-sectional areas. Can do.

  Next, the operation of the hybrid field double gap synchronous machine according to the first embodiment will be described. Here, the operation will be described using an electric motor as an example. First, in the inner gap 3a, torque as a permanent magnet type synchronous machine is generated between the main magnetic flux generated by the permanent magnet 122 and the armature current supplied to the inner armature winding 114. On the other hand, in the outer gap 3b, when the field current If is supplied to the field winding 215 and an 18-pole magnetomotive force is generated, this is modulated by the 15-pole salient pole 222 of the outer rotor 22, and the 12-pole A rotating magnetic flux is created. Torque as an electromagnetic synchronous machine is generated between the rotating magnetic flux and the armature current supplied to the outer armature winding 214. Therefore, the total torque of the inner rotor 12 and the outer rotor 22 is obtained from the rotating shaft, and the hybrid field double gap synchronous machine according to the first embodiment operates as a 30-pole synchronous motor.

FIG. 3 is a graph showing the back electromotive force E (phase voltage) induced in the inner armature winding 114 and the outer armature winding 214 in the hybrid field double gap synchronous machine of FIG. In FIG. 3, the field current If is −3 to +3 (A) in a state where the inner rotor 12 and the outer rotor 22 are externally driven and the inner armature winding 114 and the outer armature winding 214 are opened. The waveform of the counter electromotive force E when the rotation speed Nr is 1200 (min ⁻¹ ) is shown. The magnitude of the back electromotive force E can be freely adjusted by the field current If. When a large torque is required in the low speed region, the field current If is flowed positive to increase the back electromotive force E, and in the high speed region the field current If is flowed to zero or negative to reduce the back electromotive force E. Thus, the weakening control by the d-axis current id can be minimized. As a result, the operation range (driveable rotation speed-torque range) can be widened. Further, since only the minimum necessary d-axis current id and magnetic force are used in the high speed range, copper loss and iron loss can be reduced.

  Even if the hybrid field type double gap synchronous machine has the same external shape, the ratio of the size of each of the permanent magnet type drive unit 1 and the electromagnet type drive unit 2 is changed, so that the low speed and large torque priority type or the high speed type Since it can be changed to a low torque type, a flexible design is possible.

FIG. 4 is a graph showing the torque with respect to the q-axis current in the hybrid field double gap synchronous machine of FIG. FIG. 4 shows a change in torque T (total torque obtained from the inner rotor 12 and the outer rotor 22) with respect to the q-axis current iq when the vector control is performed with the d-axis current id set to 0 (A). That is, in FIG. 4, the torque with respect to the q-axis current iq when the hybrid field type double gap synchronous machine is driven as an electric motor, the field current If is 3 (A), and the rotation speed Nr is 1200 (min ⁻¹ ). The change of T is shown. In the present invention, as in the conventional synchronous machine, the torque T can be controlled linearly by the q-axis current iq.

  Note that Embodiment 1 is merely an example, and the present invention is not limited to this. In the first embodiment, 2pa is 12 poles, 2pf is 18 poles, and pa + pf is 15. However, if pa and pf are pa ≠ pf and | pa−pf | ≠ 1, whatever A combination may be used. The reason for pa ≠ pf is that the outer armature winding 214 and the field winding 215 are not transformer-coupled. The reason of | pa−pf | ≠ 1 is to balance the radial electromagnetic force so as not to generate abnormal vibration or noise with respect to the rotating shaft. However, this restriction may be removed if there is no problem even if the characteristics deteriorate due to these effects.

  In the first embodiment, the configuration in which the outer armature winding 214, the field winding 215, and the inner armature winding 114 are concentratedly wound has been described. However, these windings may be distributed windings. Also, a combination of concentrated winding and distributed winding may be used. Further, any one of the outer armature winding 214 and the field winding 215 may be disposed more radially inward.

  In the first embodiment, the configuration in which the permanent magnet 122 is affixed to the surface of the rotor core 121 of the inner rotor 12 has been described. However, the permanent magnet 122 is the interior of the rotor core 121 of the inner rotor 12. It may be a special arrangement in which it is embedded in a single pole, one pole is composed of a plurality of permanent magnets 122, or the permanent magnets 122 are V-shaped. Further, the permanent magnet 122 may be a ring magnet that is not separated for each pole.

  In the first embodiment, the configuration in which the outer rotor 22 has (pa + pf) salient poles 222 has been described. However, the outer rotor 22 may have (pa + pf) magnetic salient poles 222. For example, any type of reluctance type rotor may be used, for example, a (pa + pf) set of flux barriers may be provided on a cylindrical rotor.

  Further, in the first embodiment, the configuration in which the shared stator core 4 is shared by the permanent magnet type driving unit 1 and the electromagnet type driving unit 2 has been described. The core back 111 and the core back 211 may be separated into two without being shared.

  In the first embodiment, the number of slots of each pole and phase of the permanent magnet drive unit 1 is 2/5. However, the present invention is not limited to this, and any slot combination may be used.

  As described above, according to the hybrid field type double gap synchronous machine according to the first embodiment of the present invention, it is possible to increase the torque and reduce the amount of permanent magnets, and the conventional operation range as a synchronous machine is reduced. Compared with the permanent magnet type synchronous machine and the electromagnetic type synchronous machine, it can be widened.

  Moreover, since the number of poles of the electromagnet drive unit 2 is equal to the number of poles of the permanent magnet drive unit 1, it can be driven by one inverter as in the conventional synchronous machine.

  A method of connecting a conventional permanent magnet type synchronous machine and an electromagnetic type synchronous machine in the axial direction to form a hybrid is also conceivable, but there is a demerit that the size in the axial direction becomes long. On the other hand, the present invention can effectively use the space inside in the radial direction as compared with this, so that the hybrid field double gap synchronous machine can be miniaturized.

Embodiment 2. FIG.
FIG. 5 is a cross-sectional view showing a main part of a hybrid field type double gap synchronous machine according to Embodiment 2 of the present invention. In the hybrid field type double gap synchronous machine according to Embodiment 2, the inner gap 3a is formed by the permanent magnet type driving unit 1 and the outer gap 3b is an electromagnetic type among two gaps provided apart in the radial direction. The point formed by the drive unit 2 is the same as that of the first embodiment. On the other hand, in the hybrid field double gap synchronous machine according to the second embodiment, the outer armature winding 214 has 12 poles 2 pa, the field winding 215 has 2 poles 18 pf, and the outer rotor 22 has The number pr of the salient poles 222 is calculated from | pa−pf | and becomes 3 poles. The number of poles of the inner armature winding 114 is calculated from 2 | pa-pf | and is 2 × 3, that is, 6 poles. The circumferential arrangement of the outer armature winding 214 is arranged in the clockwise direction in the first embodiment in the U phase, the W phase, the V phase, and the U phase, whereas in the second embodiment, the outer armature winding 214 is arranged in the clockwise direction. It is aligned with the U phase, V phase, W phase, and U phase. The number of slots per phase of each pole of the permanent magnet drive unit 1 is ½. Dimensions such as the outer diameter are the same as those in the first embodiment.

  As described above, according to the hybrid field double gap synchronous machine according to the second embodiment, the same effect as that of the first embodiment can be expected and the number of poles is set to be smaller. And the iron loss is less, so that the efficiency can be improved in the high speed range.

Embodiment 3 FIG.
FIG. 6 is a cross-sectional view showing a main part of a hybrid field type double gap synchronous machine according to Embodiment 3 of the present invention. In the hybrid field-type double gap synchronous machine according to the third embodiment, the inner gap 3a is formed by the permanent magnet type driving unit 1 and the outer gap 3b is an electromagnetic type among two gaps provided apart in the radial direction. The point formed by the drive unit 2 is the same as that of the first embodiment. On the other hand, in the first embodiment, the permanent magnet drive unit 1 is an inner rotor type and the electromagnet drive unit 2 is an outer rotor type, whereas in the third embodiment, the permanent magnet drive unit 1 is an outer rotor. The mold and the electromagnet type drive unit 2 are an inner rotor type. The rotor core 121 of the inner rotor 12 and the base 221 of the outer rotor 22 are integrally formed. In addition, the outer diameter, the number of poles 2pa of the outer armature winding 214, the number of poles 2 (pa + pf) of the inner armature winding 114, the number of poles 2pf of the field winding 215, and the number pr of the salient poles 222 are This is the same as the first embodiment.

  As described above, according to the hybrid field type double gap synchronous machine according to the third embodiment of the present invention, in addition to the same effects as those of the first embodiment, each of the inner rotor 12 and the outer rotor 22 is provided. Since the core back can be shared, the weight can be reduced and the inertia of the inner rotor 12 and the outer rotor 22 can be reduced.

  In the third embodiment, the configuration in which the number pr of the salient poles 222 is a number calculated from pa + pf has been described. However, as in the second embodiment, the number pr of the salient poles 222 is | pa−. It may be a number calculated from pf |.

Embodiment 4 FIG.
FIG. 7 is a sectional view showing a main part of a hybrid field type double gap synchronous machine according to Embodiment 4 of the present invention. In the hybrid field type double gap synchronous machine according to the fourth embodiment, the outer gap 3b is formed by the permanent magnet type driving unit 1 and the inner gap 3a is an electromagnetic type among two gaps provided apart in the radial direction. It is formed by the drive unit 2.

  The permanent magnet type drive unit 1 includes an outer stator 13 that is a stator for a permanent magnet type drive unit, and an outer rotor 14 that is a rotor for a permanent magnet type drive unit provided to face the outer stator 13. have. The outer stator 13 is disposed radially inward of the outer rotor 14. The outer gap 3 b is formed between the outer stator 13 and the outer rotor 14.

  The electromagnet driving unit 2 includes an inner stator 23 that is an electromagnet driving unit stator, and an inner rotor 24 that is an electromagnet driving unit rotor provided to face the inner stator 23. ing. The inner stator 23 is disposed on the radially outer side than the inner rotor 24. The inner gap 3 a is formed between the inner stator 23 and the inner rotor 24.

  The outer stator 13 includes a core back 131 and a stator core 133 having 36 teeth 132 extending radially outward from the core back 131, and an outer armature that is a first armature winding wound around the teeth 132. And winding 134. The outer armature winding 134 is a three-phase armature winding. The teeth 132 are arranged at equal intervals in the circumferential direction.

  The inner stator 23 includes a core iron 233 having 18 teeth 232 extending radially inward from the core back 231 and the core back 231, and an inner armature that is a second armature winding wound around the teeth 232. Winding 234 and field winding 235 wound around teeth 232 are provided.

  The core back 131 and the core back 231 are integrally formed. In other words, the stator core 133 and the stator core 233 are integrally formed.

  The outer rotor 14 has a rotor core 141 and a plurality of permanent magnets 142 fixed to the rotor core 141 and facing the radially outer surface of the outer stator 13. The permanent magnet 142 serves as a main magnetic flux generation source (field magnetic pole) of the permanent magnet drive unit 1. The permanent magnet 142 is composed of a neodymium sintered magnet. The permanent magnet 142 is not limited to a neodymium sintered magnet, and may be made of other materials.

  The inner rotor 24 has an annular base 241 and a plurality of salient poles 242 extending from the base 241 toward the radially outer side. The salient pole 242 faces the radially inner side surface of the inner stator 23. The plurality of salient poles 242 are arranged at equal intervals in the circumferential direction. The salient poles 242 are used to create the main magnetic flux of the electromagnetic drive unit 2. The outer rotor 14 and the inner rotor 24 are mechanically coupled. A rotation shaft (not shown) is fixed to the outer rotor 14. The rotating shaft is rotatably supported by a housing (not shown) via a bearing (not shown). The outer diameter, the number of poles 2pa of the inner armature winding 234, the number of poles 2 (pa + pf) of the outer armature winding 134, the number of poles 2pf of the field winding 235, and the number pr of the salient poles 242 are described in the first embodiment. Of the outer armature winding 214, the number of poles 2 (pa + pf) of the inner armature winding 114, the number of poles 2 pf of the field winding 215, and the number pr of the salient poles 222.

  As described above, according to the hybrid field type double gap synchronous machine according to the fourth embodiment of the present invention, the generated torque of the permanent magnet type drive unit 1 can be easily made larger than that of the electromagnet type drive unit 2. A configuration suitable for high torque-oriented applications can be facilitated.

  In the fourth embodiment, the configuration in which the number pr of the salient poles 242 is a number calculated from pa + pf has been described. However, as in the second embodiment, the number pr of the salient poles 242 is | pa−. It may be a number calculated from pf |.

Embodiment 5. FIG.
FIG. 8 is a sectional view showing a main part of a hybrid field type double gap synchronous machine according to Embodiment 5 of the present invention. In the hybrid field type double gap synchronous machine according to the fifth embodiment, of the two gaps provided apart in the radial direction, the outer gap 3b is formed by the permanent magnet drive unit 1, and the inner gap 3a is an electromagnetic type. The point formed by the drive unit 2 is the same as that of the fourth embodiment. In the fourth embodiment, the permanent magnet type drive unit 1 is an outer rotor type and the electromagnet type drive unit is an inner rotor type, whereas in the fifth embodiment, the permanent magnet type drive unit 1 is an inner rotor type and an electromagnet. The type drive unit 2 is an outer rotor type.

  The permanent magnet type drive unit 1 includes an outer stator 13 that is a stator for a permanent magnet type drive unit, and an outer rotor 14 that is a rotor for a permanent magnet type drive unit provided to face the outer stator 13. have. The outer stator 13 is disposed on the outer side in the radial direction than the outer rotor 14. The outer gap 3 b is formed between the outer stator 13 and the outer rotor 14.

  The electromagnet driving unit 2 includes an inner stator 23 that is an electromagnet driving unit stator, and an inner rotor 24 that is an electromagnet driving unit rotor provided to face the inner stator 23. ing. The inner stator 23 is disposed radially inward of the inner rotor 24. The inner gap 3 a is formed between the inner stator 23 and the inner rotor 24.

  The outer stator 13 includes a core back 131 and a stator core 133 having 36 teeth 132 extending radially inward from the core back 131, and an outer armature that is a first armature winding wound around the teeth 132. And winding 134. The outer armature winding 134 is a three-phase armature winding. The teeth 132 are arranged at equal intervals in the circumferential direction.

  The inner stator 23 includes a core core 233 having a core back 231 and 18 teeth 232 extending radially outward from the core back 231, and an inner armature that is a second armature winding wound around the teeth 232. Winding 234 and field winding 235 wound around teeth 232 are provided.

  The outer rotor 14 has a rotor core 141 and a plurality of permanent magnets 142 fixed to the rotor core 141 and facing the radially inner side surface of the outer stator 13. The permanent magnet 142 serves as a main magnetic flux generation source (field magnetic pole) of the permanent magnet drive unit 1. The permanent magnet 142 is composed of a neodymium sintered magnet. The permanent magnet 142 is not limited to a neodymium sintered magnet, and may be made of other materials.

  The inner rotor 24 has an annular base 241 and a plurality of salient poles 242 extending radially inward from the base 241. The salient pole 242 faces the radially outer surface of the inner stator 23. The plurality of salient poles 242 are arranged at equal intervals in the circumferential direction. The salient poles 242 are used to create the main magnetic flux of the electromagnetic drive unit 2. The rotor core 141 and the base 241 are integrally formed. The outer stator 13 and the inner stator 23 are mechanically coupled. The outer diameter, the number of poles 2pa of the inner armature winding 234, the number of poles 2 (pa + pf) of the outer armature winding 134, the number of poles 2pf of the field winding 235, and the number pr of the salient poles 242 are described in the first embodiment. Of the outer armature winding 214, the number of poles 2 (pa + pf) of the inner armature winding 114, the number of poles 2 pf of the field winding 215, and the number pr of the salient poles 222.

  As described above, according to the hybrid field type double gap synchronous machine according to the fifth embodiment of the present invention, as in the fourth embodiment, the torque generated by the permanent magnet type driving unit 1 is reduced to the electromagnet type driving unit 2. Therefore, it is easy to make the configuration suitable for low speed and high torque-oriented applications. Further, unlike the fourth embodiment, since the side surface of the synchronous machine is the core back 131 of the outer stator 21, it is easy to install the synchronous machine, and effective cooling is performed by a method such as installation of a water cooling jacket. be able to.

  In the fifth embodiment, the configuration in which the number pr of the salient poles 242 is a number calculated from pa + pf has been described. However, as in the second embodiment, the number pr of the salient poles 242 is | pa−. It may be a number calculated from pf |.

  DESCRIPTION OF SYMBOLS 1 Permanent magnet type drive part, 2 Electromagnet type drive part, 3a Inner gap, 3b Outer gap, 4 Shared fixed iron core, 11 Inner stator, 12 Inner rotor, 13 Outer stator, 14 Outer rotor, 21 Outer stator , 22 outer rotor, 23 inner stator, 24 inner rotor, 31 DC power supply, 32 three-phase AC power supply, 33 inverter circuit, 111 core back, 112 teeth, 113 stator iron core, 114 inner armature winding, 121 Rotor core, 122 permanent magnet, 131 core back, 132 teeth, 133 stator core, 134 outer armature winding, 141 stator core, 142 permanent magnet, 211 core back, 212 teeth, 213 stator core, 214 outside Armature winding, 215 field winding, 221 base, 222 salient pole, 231 core back, 32 teeth, 233 stator core, 234 inside the armature windings, 235 field winding 241 base 242 poles.

Claims (5)

A permanent magnet type drive unit and an electromagnet type drive unit provided inside or outside in the radial direction with respect to the permanent magnet type drive unit, and two gaps are formed by the permanent magnet type drive unit and the electromagnet type drive unit. A hybrid field type double gap synchronous machine formed away in the radial direction,
The permanent magnet type driving unit includes a permanent magnet type driving unit stator including a multiphase first armature winding, and a permanent magnet type driving unit provided facing the permanent magnet type driving unit stator. With rotor for
The electromagnet type drive unit is provided opposite to the electromagnet type drive unit stator including a multiphase second armature winding and a field winding, and the electromagnet type drive unit stator. An electromagnetic drive rotor including a pole,
The number of salient poles and the number of pole pairs of the rotor for the permanent magnet type drive unit are set such that the number of pole pairs of the second armature winding is pa, the number of pole pairs of the field winding is pf, and pa ≠ pf. In case, | pa ± pf | is a hybrid field type double gap synchronous machine.   2. The hybrid field double gap synchronous machine according to claim 1, wherein | pa−pf | ≠ 1.   3. The hybrid field double gap according to claim 1, wherein the fundamental wave phases of the no-load induced voltage induced in each of the first armature winding and the second armature winding are equal to each other. Synchronous machine.   The hybrid field type double gap synchronous machine according to any one of claims 1 to 3, wherein the electromagnet type drive unit is provided on the outer side in the radial direction than the permanent magnet type drive unit.   The hybrid field type double gap synchronous machine according to any one of claims 1 to 3, wherein the electromagnet type drive unit is provided on the inner side in the radial direction than the permanent magnet type drive unit.

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