JP6404092B2 - Motor with resolver, motor resolver structure - Google Patents

Description

  The present invention relates to a motor including a resolver and a motor resolver structure.

  In recent years, permanent magnet synchronous motors (hereinafter referred to as PM motors) have less efficiency and power factor because there is no secondary copper loss and no excitation current compared to induction motors. It is excellent, and since the downsizing is facilitated by the improvement of the performance of the permanent magnet, it is often used.

  A resolver may be attached to the PM motor to accurately detect the position of the motor rotor. For example, Patent Document 1 discloses a structure in which a resolver rotor (81) is fixed to a motor rotor (53) that rotates a shaft (52) (see Paragraphs 0023 and 0030 of Patent Document 1 and FIG. 3). 10 of this application is FIG. 3 of patent document 1. The number in a parenthesis is the code | symbol used in patent document 1.

  Even in the case of a PM motor, a resolver is attached to the PM motor based on the same concept. FIG. 11 shows a basic conceptual diagram of a conventional structure in which a resolver is attached to a PM motor. In the conventional structure, the PM motor 910 includes a motor stator 915 and a motor rotor 950, and the motor rotor 950 is fixed to the shaft 50. The resolver 920 includes a resolver stator 925 and a resolver rotor 940, and the resolver rotor 940 is fixed to the shaft 50.

JP 2013-258805 JP

  According to the conventional structure shown in FIG. 11, since the resolver and the PM motor have independent configurations, it is necessary to align the reference position of the resolver rotor of the resolver and the reference position of the motor rotor of the PM motor. In particular, when a small resolver is attached to a small PM motor, it is difficult to accurately perform the alignment. Such a problem also applies to a combination of a stepping motor other than the PM motor and a resolver.

  Therefore, an object of the present invention is to provide a motor and a motor resolver structure including a resolver that do not require alignment between the reference position of the resolver rotor of the resolver and the reference position of the motor rotor of the motor.

  The motor of the present invention includes a first stator that constitutes the motor, a second stator that constitutes a resolver, and a rotor. This rotor is a rotor constituting a resolver and a rotor constituting a motor.

  It is desirable that the resolver's shaft multiple is equal to the number of reluctance changes around the rotor's axis of rotation. When the rotor is an IPM rotor, the resolver shaft double angle is equal to twice the motor shaft double angle. In the case where the rotor is an SPM rotor in which a portion where the magnetic material constituting the rotor is exposed on the surface of the rotor, the axial multiplication angle of the resolver is equal to twice the axial multiplication angle of the motor. When the rotor is a magnetic rotor that does not have a fixed magnetic field and an induction magnetic field, the axial multiplication angle of the resolver is equal to the number of salient poles of the rotor. In addition, it is desirable that the rotor is disposed in a range covered by the magnetic field lines from the teeth of the second stator.

  The motor resolver structure of the present invention is a motor resolver structure in which a resolver is attached to a motor including a motor stator having a tooth around which a coil for generating a rotating magnetic field is wound, and a rotor. The resolver is constituted by a resolver stator having a tooth wound with an output phase coil for outputting a tooth and a resolver signal, and a rotor of the motor. The resolver stator has a single shaft rotation angle of the resolver and the rotor rotates once. It is configured to be equal to the number of reluctance changes at the time.

  According to the present invention, since the rotor is shared by the resolver and the motor, it is not necessary to align the reference position of the resolver rotor of the resolver and the reference position of the motor rotor of the motor.

1 is a schematic configuration diagram of a “motor equipped with a resolver” according to an embodiment. FIG. (A) The top view of a motor. (B) The top view of a rotor. (A) The top view of a resolver part. (B) The perspective view of a resolver part. The figure explaining the positional relationship of a rotor and the resolver stator of a resolver part. An example of an SPM rotor. The example of the rotor used for a variable reluctance motor. The simulation result of the resolver signal obtained in the embodiment. The simulation result of the resolver signal obtained in the modification 2. The simulation result of the resolver signal obtained in a comparative example. A brushless motor resolver structure shown in FIG. 3 of Patent Document 1. The basic conceptual diagram of the conventional structure which attached the resolver to PM motor.

<Consideration to the Present Invention>
The inventors considered a typical conventional structure shown in FIG. 11 in creating a motor-resolver structure that does not require alignment between the reference position of the resolver rotor of the resolver and the reference position of the motor rotor of the motor.

  As shown in FIG. 11, the conventional structure is a structure in which a resolver and a motor having independent structures are combined. The purpose and application of the motor and the resolver are different from each other. It was guessed that it was a product. In addition, it was speculated that the purpose of detecting the position of the motor rotor of the motor by the resolver was achieved with the conventional structure as shown in FIG.

  Such a situation created a technical blind spot, and the conventional structure as shown in FIG. 11 would have been considered a natural structure. However, the present inventors recalled that the basic principles of the resolver and the motor have a common point, and have a fundamental question on the conventional structure combining the resolver and the motor having independent configurations. . In other words, it came to mind about the possibility of sharing some physical elements between the motor and the resolver. Then, considering the above-mentioned problems, the shared physical element only needs to be a rotor. Therefore, the possibility of sharing the rotor between the motor and the resolver was specifically examined.

As a motor rotor of a PM motor, an IPM (Interior Permanent Magnet) rotor and an SPM (Surface Permanent Magnet) rotor are known.
As shown in FIG. 2B, which will be described in detail later, the IPM rotor has a plurality of permanent magnets arranged at equal intervals around the rotation axis of the magnetic rotor, for example, inside a magnetic rotor formed of silicon steel. The rotor is buried so that the poles of the permanent magnets facing the rotation axis are staggered.
As shown in FIG. 5, which will be described in detail later, the SPM rotor has a plurality of permanent magnets on the surface of a magnetic rotor formed of, for example, silicon steel at equal intervals around the rotation axis of the magnetic rotor. It is the rotor arrange | positioned so that the pole of each permanent magnet which goes to an axis line may become alternate.

  The driving torque of the PM motor using the IPM rotor is derived from the magnet torque and the reluctance torque. The magnet torque is a torque generated by a permanent magnet attracting and repelling a rotating magnetic field generated by applying an AC voltage to a coil wound around the teeth of the motor stator. The reluctance torque is a torque generated based on a change in reluctance strength around the rotation axis of the IPM rotor.

  On the other hand, resolvers, particularly variable reluctance type resolvers, apply an AC voltage to the exciting coil wound around the teeth of the resolver stator to change the strength of gap reluctance around the resolver rotor rotation axis between the resolver stator and resolver rotor. The resolver signal based on this is detected by an output phase coil wound around the teeth of the resolver stator.

  Further, referring to FIG. 11, since the IPM rotor of the PM motor is fixed to the shaft, and the resolver rotor of the resolver is fixed to the shaft, the rotation of the IPM rotor of the PM motor and the rotation of the resolver rotor of the resolver are Match.

  Considering these things, if the resolver can utilize the change in the reluctance strength around the rotation axis of the IPM rotor of the PM motor, the rotation angle of the IPM rotor of the PM motor can be detected by the resolver. For this purpose, the IPM rotor only has to be arranged in a range covered by the magnetic field lines from the teeth of the resolver stator. However, since the resolver uses the change in the reluctance strength around the rotation axis of the IPM rotor of the PM motor, the resolver stator of the resolver needs to have a configuration corresponding to the detection of the resolver signal based on the change in the strength of the reluctance. is there. In other words, the resolver may be configured such that the resolver shaft multiple is equal to the number of reluctance changes around the IPM rotor rotation axis of the PM motor (however, this number is an integer). is necessary.

  Even if the motor rotor of the PM motor is an SPM rotor, if there is an exposed portion of the magnetic material constituting the SPM rotor on the surface of the SPM rotor, the change in reluctance strength around the SPM rotor rotation axis is again Occurs. Therefore, the resolver can be configured similarly to the case of the IPM rotor. Also in this case, the resolver is configured such that the resolver's shaft double angle is equal to the number of changes in the reluctance strength around the SPM rotor rotation axis of the PM motor (however, this number is an integer). It is necessary.

  As is clear from the above description, the point is that the resolver only needs to be configured so that the change in reluctance around the motor rotor rotation axis of the motor can be used. Therefore, the motor is not limited to the PM motor. A variable reluctance motor that applies an AC voltage to an excitation coil wound around the teeth of the motor and drives the motor rotor with a reluctance torque generated based on a change in the strength of the gap reluctance around the rotation axis of the motor rotor between the motor stator and the motor rotor. There may be. In short, the motor constituting the present invention may be a motor that generates reluctance torque when the motor rotor of the motor is driven, in other words, a motor that reluctance changes an integer number of times around the rotation axis of the motor rotor. After all, it is necessary for the resolver to be configured so that the axial multiplication angle of the resolver is equal to the number of reluctance changes around the motor rotor rotation axis of the motor (however, this number is an integer). .

<Embodiment>
Hereinafter, an embodiment of the present invention created based on the above consideration will be described with reference to the drawings. In each drawing, only a part of a plurality of identical components is given a sign in consideration of easy viewing.

  As shown in FIG. 1, the motor 110 of the present invention includes a resolver unit 120 that uses the rotor 130 of the motor 110 as a rotor.

[motor]
As shown in FIG. 2, the motor 110 includes a cylindrical motor stator 115 having a plurality of motor teeth 113 around which a coil 111 for generating a rotating magnetic field is wound, and a hollow columnar rotor 130. .

  As shown in FIG. 2A, a plurality of motor teeth 113 are arranged at equal intervals on the inner wall of the cylindrical motor stator 115 so as to make a round. Each motor tooth 113 protrudes from the inner wall of the motor stator 115 so that the wall surface of the virtual cylinder 117 is constituted by the end surfaces 113a of the plurality of motor teeth 113 facing the rotor 130 in the cross-sectional area including this circular arrangement. Hereinafter, the central axis of the virtual cylinder 117 is referred to as the central axis 119 of the motor stator 115. In the example shown in FIG. 2, the number of motor teeth 113 is 16.

  The rotor 130 is an IPM rotor. As shown in FIG. 2B, the rotor 130 in this example includes a cylindrical main body 131 made of silicon steel, which is a magnetic material, and a plurality of (in this example) the main body 131 formed in the main body 131. 6) air gaps 133. The six air gaps 133 are arranged at equal intervals around the rotation axis 139 of the main body 131. Each air gap 133 has an opening outside the rotor 130 and two gap areas 133a formed toward the inside of the rotor 130, and a magnet area formed so as to form a string connecting the two gap areas 133a. A permanent magnet 135 is fixed to the magnet area of each air gap 133. Each permanent magnet 135 is disposed so that the polarities of adjacent permanent magnets 135 are different (see FIG. 2B. In FIG. 2B, “N” represents “N pole” and “S”. Represents “S pole”). As described above, in the rotor 130, a plurality of (six in this example) permanent magnets 135 are arranged at regular intervals around the rotation axis 139 of the main body 131, and the poles of the permanent magnets 135 toward the rotation axis 139 are staggered. It is buried to become. Moreover, in the rotor 130 of this example, between the gap areas 133a of the adjacent air gaps 133 is a salient pole portion 131a that is magnetically integrated with the main body portion 131. Except for the gap area 133a, the outer shape around the rotation axis 139 of the rotor 130 is arcuate, and the distance between the arcuate portion of the rotor 130 and each end face 113a of the motor teeth 113 is the same (FIG. 2 ( a)).

In this example, the number of changes in the reluctance strength around the rotation axis 139 of the rotor 130 is six. The reluctance in the direction toward the salient pole portion 131a (so-called q axis) is stronger than the reluctance in the direction toward the permanent magnet 135 (so-called d axis), and this relative strength makes a round around the rotation axis 139 of the rotor 130. Repeated 6 times in between. In other words, when the rotor 130 is of the IPM rotor, the pole pair number of the rotor 130 (i.e., shaft angle multiplier m _m of the motor 110) corresponding to the number of changes in the reluctance of the intensity of 2 times around the rotational axis 139 of the rotor 130 of To do.

  A cylindrical shaft 50 having substantially the same diameter as the hollow portion 138 is inserted into the cylindrical hollow portion 138 of the rotor 130, and the rotor 130 is fixed to the shaft 50. The rotation axis 139 of the rotor 130 coincides with the rotation axis of the shaft 50.

  The shaft 50 is supported by, for example, a ball bearing (not shown), and the rotor 130 is in an internal space of the motor stator 115 so as not to contact the motor teeth 113 at a position facing the motor teeth 113, and the rotor 130. The rotation axis 139 is arranged so as to coincide with the center axis 119 of the motor stator 115. In this state, the rotor 130 has a length exceeding the one end 115 a of the motor stator 115 toward the resolver 120 along the extending direction of the rotation axis 139 of the rotor 130. The operating principle of the motor 110 is the same as that of a conventional motor.

[Resolver part]
As shown in FIG. 3, the resolver unit 120 includes a tooth around which an excitation coil is wound and an output phase coil for outputting a resolver signal (in FIG. 3, reference numeral 121 is assigned to both without distinguishing the excitation coil and the output phase coil). And the above-described rotor 130. The resolver stator 125 has teeth wound around it.

  A plurality of resolver teeth 123 are arranged at regular intervals on the inner wall of the cylindrical resolver stator 125. In the cross-sectional area including this circular arrangement, each resolver tooth 123 protrudes from the inner wall of the resolver stator 125 such that the wall surface of the virtual cylinder 127 is constituted by the end surfaces 123 a of the resolver teeth 123 facing the rotor 130. Hereinafter, the central axis of the virtual cylinder 127 is referred to as the central axis 129 of the resolver stator 125. In the example shown in FIG. 3, the number of resolvers 123 is twenty-two.

  In the resolver stator 125, the rotation axis 139 of the rotor 130 coincides with the central axis 129 of the resolver stator 125, and the magnetic force lines 20 from the resolver teeth 123 of the resolver stator 125 are within the range that reaches the rotor 130 (see FIG. 4). ). Preferably, resolver stator 125 is positioned so that rotation axis 139 of rotor 130 coincides with central axis 129 of resolver stator 125 and is an internal space of resolver stator 125 where rotor 130 and resolver teeth 123 face each other. Further, the rotor 130 is disposed so as not to contact the motor teeth 113.

When the resolver unit 120 is configured as a variable reluctance resolver with one-phase excitation / two-phase output, an excitation coil is wound around each resolver tooth 123 in a predetermined number of turns and winding directions, and these excitation coils are connected in series. ing. The number of windings and the winding direction of the exciting coil in each resolver 123 are such that the excitation magnetic flux distribution in a sine wave shape or a cosine wave shape can be obtained when an AC voltage is applied. Further, a two-phase detection coil is wound around the resolver teeth 123. One detection coil is called a cosine phase coil, and the other detection coil is called a sine phase coil. These cosine phase coils are connected in series, and these sine phase coils are also connected in series.
Each resolver teeth 123, taking into account the polarity of the exciting coils, the resolver shaft angle multiplier m _r cycle cosine wave output at the inner circumference of the round of the resolver stator 125 to the circuit portion constituted by a series connection of the cosine-phase coils The cosine phase coil is wound with the number of windings and the direction in which the voltage is generated.
In addition, each resolver teeth 123, taking into account the polarity of the exciting coils, the inner periphery of the sinusoidal output voltage of the m _r cycles around the resolver stator 125 to the circuit portion constituted by a series connection of the sine coil The sinusoidal coil is wound with the number of turns and the direction of winding.
Here, the resolver shaft angle multiplier m _r is equal to twice the shaft angle multiplier m _m of the motor 110.
In the above-described configuration, in the fluctuating magnetic field induced by the alternating current flowing through the exciting coil, a cosine phase output voltage having a voltage amplitude corresponding to the rotation angle of the rotor 130 is generated in the circuit unit constituted by the cosine phase coil. Since a sine-phase output voltage having a voltage amplitude corresponding to the rotation angle of 130 is generated in the circuit unit constituted by the sine-phase coils, the rotation angle of the rotor 130 can be detected from these two-phase output voltages.

[Modification 1]
In the above-described configuration, the rotor 130 is an IPM rotor. However, as described above, the rotor 130 may be an SPM rotor in which a portion where the magnetic material forming the rotor is exposed exists on the surface of the rotor.

  As shown in FIG. 5, the rotor 130 in the case of an SPM rotor includes a cylindrical main body 132 formed of silicon steel, which is a magnetic material, and a plurality of (in this example) fixed to the surface of the main body 132. 4) permanent magnets 135 are provided. The intervals between adjacent permanent magnets 135 around the rotation axis 139 of the main body 132 are the same. Further, each permanent magnet 135 is arranged so that the polarities of adjacent permanent magnets 135 are different (see FIG. 5. In FIG. 5, “N” represents “N pole”, and “S” represents “S pole”. "). Thus, in the rotor 130 in the case of the SPM rotor, a plurality (four in this example) of permanent magnets 135 are equally spaced around the rotation axis 139 of the main body 132 and each permanent magnet 135 faces the rotation axis 139. The 135 poles are arranged alternately. Between the adjacent permanent magnets 135 is a gap portion 137 (see FIG. 5) or salient pole portion that is magnetically integrated with the main body portion 132, and a magnetic body constituting the rotor 130 is on the surface of the rotor 130. Exposed. Except for such an exposed portion, the outer shape of the rotor 130 around the rotation axis 139 is arcuate, and the distance between the arcuate portion of the rotor 130 and each end face 113a of the motor teeth 113 is the same.

In the first modification, the number of changes in the reluctance strength around the rotation axis 139 of the rotor 130 is four. The reluctance in the direction toward the gap 137 (so-called q axis) is stronger than the reluctance in the direction toward the permanent magnet 135 (so-called d axis), and this relative strength makes a round around the rotation axis 139 of the rotor 130. Repeated 4 times in between. In other words, when the rotor 130 is of the SPM rotor, the pole pair number of the rotor 130 (i.e., shaft angle multiplier m _m of the motor 110) corresponding to the number of changes in the reluctance of the intensity of 2 times around the rotational axis 139 of the rotor 130 of To do.

Any modification 1, the resolver shaft angle multiplier m _r is set equal to twice the shaft angle multiplier m _m of the motor 110.

[Modification 2]
As described above, the rotor 130 may be a rotor used in a variable reluctance motor. Such a rotor 130 is made of silicon steel, which is a magnetic material, and has, for example, a spur gear shape as shown in FIG. 6, but does not have a fixed magnetic field and an induction magnetic field. The rotor 130 of the second modification has a plurality of (six in this example) salient pole portions 131b, and the end face 131c of each salient pole portion 131b toward the motor stator 115 has an arc shape. For this reason, the distance between the arc-shaped portion of the rotor 130 and each end face 113a of the motor teeth 113 is the same.

In the second modification, the number of changes in the reluctance strength around the rotation axis 139 of the rotor 130 is six. The reluctance in the direction toward the salient pole portion 131b is stronger than the reluctance in the direction toward the adjacent salient pole portion 131b, and this relative strength is six times during one round of the circumference of the rotation axis 139 of the rotor 130. Repeated. In other words, the number of salient poles of the rotor 130 corresponds to the number of reluctance strength changes around the rotation axis 139 of the rotor 130. In Modification 2, the resolver shaft angle multiplier m _r is set equal to the number of salient poles of the rotor 130 of the motor 110.

  As apparent from the above description, since the rotor 130 of the motor 110 is used as the rotor of the resolver unit 120, alignment between the reference position of the rotor of the resolver unit and the reference position of the rotor of the motor becomes unnecessary. In addition, since a resolver rotor is not required, it is possible to reduce the cost for the mold and the labor for alignment.

In the above-described embodiment, when the resolver stator 125 of the resolver unit 120 is disposed close to the motor 110, the resolver unit 120 picks up the leakage magnetic flux from the motor 110, and the accuracy of the angle output of the resolver deteriorates. There can be concern. However, in such a case, accuracy degradation can be prevented by synchronous detection performed by, for example, a tracking loop type resolver / digital converter employed in a conventional resolver. See, for example, Reference 1 for the tracking loop method.
(Reference 1) Kenichi Nakazato et al., “Development of Resolver Digital (R / D) Converter”, Aviation Electronics Technical Report No.32, Aviation Electronics Industry Co., Ltd., 2009.03.

[simulation]
FIG. 7 shows a simulation result of the resolver signal obtained in the above embodiment, and FIG. 8 shows a simulation result of the resolver signal obtained in the second modification. In the simulation, the rotor inner diameter was 30 mm, the rotor outer diameter was 80 mm, and the stator outer diameter was 138 mm.

  First, in the simulation of the above embodiment, as shown in FIG. 7, a variable reluctance resolver unit of one-phase excitation / two-phase output shown in FIG. 3 is adopted as an analysis model. It can be seen from the magnetic flux density distribution at this time that there is a strong magnetic flux density around each salient pole part of the rotor (in the magnetic flux density distribution shown in FIG. 7, the dark and light portions indicate the strong magnetic flux density). In addition, it can be confirmed from the output voltage graph that a two-phase output that varies between the sin curve and the cos curve is obtained, and from the angle error graph, the electrical angle error corresponding to the rotor rotation angle is at most about 0.3 °. It was also confirmed that good results were obtained.

  In the simulation of the second modification, as shown in FIG. 8, a resolver portion having a spur gear-like rotor shown in FIG. 6 is adopted as an analysis model. It can be seen from the magnetic flux density distribution at this time that there is a strong magnetic flux density around each salient pole portion of the rotor, although it is weak compared to the case of the IPM rotor (in the magnetic flux density distribution shown in FIG. Shows magnetic flux density). In addition, it can be confirmed from the output voltage graph that a two-phase output that varies between the sin curve and the cos curve is obtained, and from the angle error graph, the electrical angle error corresponding to the rotor rotation angle is less than 0.1 °. It was also confirmed that very good results were obtained.

As a comparative example, the simulation results of the resolver signals other than those set equal to the shaft angle multiplier m _m of the resolver shaft angle multiplier m _r and the motor 110 is obtained in a configuration having the same conditions as the simulation of the embodiment shown in FIG. 7 As shown in FIG. It can be seen from the magnetic flux density distribution at this time that there is no strong magnetic flux density around each salient pole part of the rotor. Moreover, it can be confirmed from the output voltage graph that the two-phase output does not change between the sin curve and the cos curve, and in this case, the electrical angle error cannot be calculated.

  From these simulation results, it can be understood that the resolver signal can be correctly obtained by the configuration of the present invention. It can also be understood that the resolver needs to be configured such that the resolver shaft angle is equal to the number of reluctance strength changes around the rotor rotation axis of the motor.

<Supplementary note>
The gist of the present invention is that the motor rotor is used as the resolver rotor. Therefore, it is not essential that the resolver stator is a component of the motor. For example, a motor resolver structure in which the resolver portion 120 is configured by the resolver stator 125 and the rotor 130 by attaching the resolver stator 125 that is not a component of the motor 110 to the motor 110 described above is based on the same concept. To be understood as an invention. Even in this case, it is only necessary that the resolver stator 125 is configured so that the axial multiplication angle of the resolver is equal to the number of reluctance changes when the rotor makes one revolution.

  Further, there is no limitation on the shapes of the stator and the rotor included in the motor that can implement the present invention, and similarly, there is no limitation on the shapes of the stator and the rotor included in the resolver. The shape of the stator is not the above-described cylindrical shape, and may be a shape such as a flat washer, for example. Even in this case, the above technical matters relating to the structure other than the shape (for example, the arrangement of the teeth and the configuration of the teeth) are appropriate. Further, the shape of the rotor may be a thin plate shape instead of the columnar shape described above. Even in this case, the above technical matters relating to the structure other than the shape (for example, the arrangement of the rotor inside the stator) are appropriate. In addition, the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.

20 Magnetic field line 50 Shaft 110 Motor 111 Coil 113 Motor teeth 113a End face 115 Motor stator 115a End 117 Virtual cylinder 119 Center axis 120 Resolver part 121 Coil 123 Resolve teeth 123a End face 125 Resolver stator 127 Virtual cylinder 129 Center axis 130 Rotor 131 Main body 131a Salient pole part 131b Salient pole part 131c End face 132 Body part 133 Air gap 133a Gap area 135 Permanent magnet 137 Air gap part 138 Hollow part 139 Rotating axis 910 PM motor 915 Motor stator 920 Resolver 925 Resolver stator 940 Resolver rotor 950 Motor rotor

Claims (12)

A motor with a resolver,
A first stator constituting the motor;
A second stator constituting the resolver;
Including a rotor,
The rotor is a rotor constituting the resolver, and, Ri Ah in the rotor constituting the motor,
The motor according to claim 1, wherein the resolver has a shaft angle multiplier equal to the number of reluctance changes around the rotation axis of the rotor . The motor according to claim 1 ,
The rotor is an IPM rotor,
The motor characterized in that the resolver has a shaft double angle equal to twice the motor shaft double angle. The motor according to claim 1 ,
The rotor is an SPM rotor in which a portion where the magnetic body constituting the rotor is exposed is present on the surface of the rotor,
The motor characterized in that the resolver has a shaft double angle equal to twice the motor shaft double angle. The motor according to claim 1 ,
The rotor is a magnetic rotor having no fixed magnetic field and induction magnetic field,
The motor characterized in that the resolver has a shaft angle multiplier equal to the number of salient poles of the rotor. The motor according to any one of claims 1 to 4 ,
The motor is characterized in that the rotor is disposed in a range covered by magnetic lines of force from the teeth of the second stator. The motor according to any one of claims 1 to 5,
The resolver is a variable reluctance type resolver.
A motor characterized by that. A motor resolver structure in which a resolver is attached to a motor including a motor stator having teeth wound with a coil for generating a rotating magnetic field, and a rotor,
The resolver is constituted by a resolver stator having a tooth wound with an exciting coil and a tooth wound with an output phase coil for outputting a resolver signal, and the rotor of the motor. The resolver stator is configured by the resolver stator. A motor resolver structure configured such that the shaft angle multiplier is equal to the number of reluctance changes when the rotor makes one revolution. The motor resolver structure according to claim 7,
The rotor is an IPM rotor,
The resolver shaft double angle is equal to twice the motor shaft double angle.
A motor resolver structure characterized by that. The motor resolver structure according to claim 7,
The rotor is an SPM rotor in which a portion where the magnetic body constituting the rotor is exposed is present on the surface of the rotor,
The resolver shaft double angle is equal to twice the motor shaft double angle.
A motor resolver structure characterized by that. The motor resolver structure according to claim 7,
The rotor is a magnetic rotor having no fixed magnetic field and induction magnetic field,
The resolver has a shaft angle multiplier equal to the number of salient poles of the rotor.
A motor resolver structure characterized by that. A motor resolver structure according to any one of claims 7 to 10,
The rotor is disposed in a range covered by the magnetic field lines from the teeth of the resolver stator.
A motor resolver structure characterized by that. The motor resolver structure according to any one of claims 7 to 11,
The resolver is a variable reluctance type resolver.
A motor resolver structure characterized by that.