JP6313243B2 - Variable reluctance resolver - Google Patents

Description

  The present invention relates to a variable reluctance resolver, and more particularly to a structure in which a connector housing is provided at a terminal portion.

  Conventionally, the structure of Patent Document 1 is known as this type of variable reluctance resolver. FIG. 4 shows an inner rotor type variable reluctance resolver structure described in Patent Document 1, and a large number of teeth 2 and slots 3 are alternately formed in the circumferential direction inside the iron core 1. A stator winding 5 is wound around each tooth portion 2 via an insulating member 4, and the stator winding 5 and each tooth portion 2 of the iron core 1 are electrically insulated. Moreover, it has the receiving part 20 in which the insulation extension part 10 was provided, and the pin 21 for connectors is planted integrally by the insulation extension part 10, and the connector 6 is comprised. A winding cover 13 is provided on the stator winding 5.

  Moreover, the structure of patent document 2 is known as another variable reluctance type resolver. FIG. 5 is a view showing an outer rotor type variable reluctance resolver described in Patent Document 2. As shown in FIG. 6 is a cross-sectional view taken along line AA in FIG. In the outer rotor type variable reluctance resolver of FIG. 5, a large number of pole teeth 2 and slots 3 are alternately formed in the circumferential direction outside the annular stator 1. The terminal holding portion 11 formed in the through hole 10 of the ring-shaped stator 1 is formed integrally with a part of the ring-shaped insulating cover 4 formed on both end surfaces of the ring-shaped stator 1. A plurality of terminal pins 6a are integrally formed on the terminal holding portion 11, and the stator windings 5 are connected to each terminal pin 6a. On the outer periphery of the ring-shaped stator 1, pole teeth 2 corresponding to the rotor as the outer rotor are formed to protrude outward at a predetermined angular interval toward the outer periphery, and each pole tooth 2 is provided with a ring-shaped insulating cover 4. The stator winding 5 is wound.

Japanese Patent Laid-Open No. 10-309067 Japanese Unexamined Patent Publication No. 2012-135078

However, the conventional resolver structures described in Patent Documents 1 and 2 have the following problems.
(1) When connecting the harness for electrically connecting with the exterior, the connector housing for accommodating a harness in a terminal holding part may be shape | molded integrally with an insulator.
(2) In the case of a small (small diameter) variable reluctance resolver, the stator disposed on the inside of the rotor or on the outside of the rotor also has a small diameter, but there is a limit to the miniaturization of the connector housing, and the radial direction of the connector housing This position overlaps with the portion to be wound and the slot of the teeth (corresponding to the tooth portion of Patent Document 1 and the pole tooth of Patent Document 2) formed on the stator. If the position of the connector housing that overlaps with the slot is small, there will be no major hindrance to the winding of the coil around the coiled portion of the tooth, but the radial position of the connector housing will be at the coiled portion of the tooth. When they overlap, the teeth have a problem that the predetermined number of turns of the winding cannot be wound.

  In view of the above-described problems, an object of the present invention is to provide a variable reluctance resolver corresponding to a case where the position of a connector housing overlaps a portion to be wound of a tooth.

According to the first aspect of the present invention, an annular stator core having a plurality of teeth of equal shape arranged at equal pitch angles in a circumferential direction extending in a radial direction from an annular yoke, and the annular stator core is mounted. An insulator and a connector portion, disposed between the inner peripheral edge of the stator core and the tip end edge of the teeth in the radial direction, and overlapping the adjacent teeth and a slot formed between the teeth; It is not wound around the connector housing formed integrally with the insulator, at least the teeth that overlap the connector housing, and the teeth constituting the shaft multiple angle 1X including the teeth, but not wound around the other teeth. and a winding, wherein the windings are configured and exciting winding for one phase, the detection winding of the two phases, the Detecting winding phase is variable reluctance resolver, characterized in that it consists of detecting winding for outputting a detecting winding and sin phase output cos phase.

  The invention according to claim 2 is the invention according to claim 1, wherein the variable reluctance type resolver is an outer rotor type having a plurality of teeth extending radially outward from the annular yoke. To do.

  The invention according to claim 3 is the invention according to claim 1, wherein the variable reluctance type resolver is an inner rotor type having a plurality of teeth extending radially inward from the annular yoke. To do.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the insulator is integrally formed with the stator core by insert molding, and the connector housing is simultaneously formed when the insulator is molded. It is formed integrally.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to third aspects, the insulator includes a separate upper and lower insulators, and the upper and lower insulators are separated from each other. The connector housing is formed integrally with either one.

  ADVANTAGE OF THE INVENTION According to this invention, the variable reluctance type | mold resolver corresponding to the case where the position of a connector housing overlaps with the to-be-winded part of teeth is obtained.

It is a top view of the outer rotor type variable reluctance type resolver of an embodiment. It is a side view of the stator in FIG. FIG. 3 is a bottom view in FIG. 2. It is a figure which shows the inner rotor type variable reluctance type resolver by the conventional variable type resolver. It is a figure which shows the outer rotor type variable reluctance type resolver by other conventional variable type resolvers. It is AA sectional drawing in FIG.

This embodiment will be described by taking an outer rotor type variable reluctance resolver as an example.
(Resolver structure)
FIG. 1 is a plan view of an outer rotor type variable reluctance resolver 100 of the embodiment (viewed from the axial direction). FIG. 2 is a side view of the stator 101 in FIG. 1 (viewed from a direction perpendicular to the axis). FIG. 3 is a bottom view of FIG. The variable reluctance resolver 100 has a structure in which a stator 101 is disposed inside a rotor 120.

  The stator 101 has an annular structure and includes an annular stator core 102 and a winding 103 wound around the stator core 102. The stator core 102 includes a plurality of teeth 104 extending radially outward from an annular yoke 110, and a winding 103 is wound around the teeth 104. As will be described later, the winding 103 is not wound around some of the teeth 104. There are 32 teeth 104, and the same shape is formed along the circumferential direction at an equal pitch angle. The stator core 102 is configured by laminating a predetermined number of cores made of a soft magnetic material (for example, a silicon steel plate). A synthetic resin insulator 105 is attached to the stator core 102. A winding 103 is wound around the wound portion of each tooth 104 via an insulator 105.

  The rotor 120 is held so as to be rotatable with respect to the stator 101. The rotor 120 is configured by laminating a predetermined number of cores made of a soft magnetic material (for example, a silicon steel plate), and the inner peripheral surface includes a plurality of convex portions and concave portions 121 at equal pitches in the circumferential direction. Eight concave portions 121 are formed.

  The insulator 103 is made of an electrically insulating synthetic resin, and the connector housing 106 is formed by integral molding. Inside the connector housing 106, a plurality of metal connector pins 107 (six connector pins) are integrally formed by insert molding. The connector housing 106 is formed so as to protrude to one end side (upper side in FIG. 2) in the axial direction (vertical direction in FIG. 2) of the stator core 102, and the other end side (lower side in FIG. 2) of the stator core 102. A connector pin 107 protrudes from the direction side.

  A winding terminal of the winding 103 wound around each tooth 104 via an insulator 105 is entangled with a connector pin 107 protruding to the other end side of the stator core 102 and is electrically connected by soldering or welding. . The connector pin 107 protrudes upward in FIG. 2 inside the connector housing 106. A harness (connection wiring) (not shown) in which the mating connector is connected to the tip is connected to the connector pin 107 protruding inside the connector housing 106. With this harness, the excitation current is supplied to the variable reluctance resolver 100 and the detection signals of the sin phase and the cos phase from the variable reluctance resolver 100 are output.

  In this embodiment, the insulator 105 is integrally formed with the stator core 102 by insert molding. In this case, the connector housing 106 is also integrally formed at the same time as the insulator 105 is formed.

  The insulator 105 may be composed of an upper insulator and a lower insulator, and the respective insulators may be mounted on the stator core 102. In this case, the connector housing 106 is formed integrally with one insulator 105.

  The connector housing 106 protruding to one end side of the stator core 102 is disposed and formed so as to be positioned between the inner peripheral edge and the outer peripheral edge (tip edge of the teeth) of the stator core 102, and includes a plurality of teeth 104 and slots 108. It exists in the position which overlaps with the radial direction. If the connector housing 106 is positioned on the inner side of the inner peripheral edge of the stator core 102, the mounting of the stator core 102 is hindered. Arise. For this reason, it is preferable that the connector housing 106 be positioned so that an appropriate gap exists with respect to each boundary.

In addition, in the case of a variable reluctance resolver of the inner rotor type, the stator core 102 is a structure having a plurality of teeth 104 extending radially inward direction from the annular yoke 110. Therefore, the connector housing 106 protruding to one end side of the stator core 102 is disposed so as to be positioned between the inner peripheral edge (tip edge of the teeth) and the outer peripheral edge of the stator core 102, and the plurality of teeth 104 and the slots 108 are arranged. It becomes the structure which exists in the position which overlaps with radial direction.

(About winding structure)
The rotor 120 has eight concave portions 121 on the inner peripheral surface, and forms a rotor with a shaft angle multiplier of 8X. The stator 101 has 32 teeth 104 corresponding to the rotor 120 having a shaft angle multiplier of 8X, and has the same number of slots 108. The windings 103 are not wound around the four teeth 104 located in the vicinity of the connector housing 106. Therefore, the winding 103 is wound around the 28 teeth 104. The winding 103 wound around the tooth 104 is a one-phase excitation winding and a two-phase detection winding, and two phases of a sin phase and a cos phase are output from the detection winding.

  As teeth for constituting the resolver, four teeth constitute a shaft double angle 1X, and therefore, in the case of the rotor 120 having a shaft double angle 8X as shown in the figure, there are 32 teeth 104. In the structure, the winding 103 is wound around 7X. Four teeth 104 constitute one set, and seven sets of teeth 104 are formed. (Except for four teeth 104 as one set) Excitation windings are adjacent to adjacent teeth 104 and the winding direction is CW (clockwise). It is continuously wound so that CCW (counterclockwise) is alternated.

  Of the two-phase detection windings, the detection winding that outputs the cos phase is wound around a predetermined tooth 104 and is not wound around the adjacent tooth 104, and the winding direction is set to the next tooth 104. On the contrary, it is wound on the excitation winding and this is continuously performed. In addition, the detection winding that outputs the sin phase is wound around the teeth 104 that are not wound with the detection winding that outputs the cos phase, and then is not wound around the adjacent teeth 104, and the next cos phase is The detection winding to be output is wound around the excitation winding with the winding direction reversed on the teeth 104, and this is continuously performed.

  Each end of the excitation winding and the two-phase detection winding is entangled with a connector pin 107 protruding to the other end side (the lower direction in FIG. 2) of the stator core 102, and is connected to the connector pin 107 by soldering or welding. Electrically connected.

(Operation)
When a predetermined sinusoidal excitation voltage is applied to the excitation winding from the outside via the connector pin 107, an excitation current flows through the excitation winding, and a detection winding for outputting a cos phase and a sin phase are output. A cos output signal and a sin output signal having a predetermined phase and amplitude corresponding to the relative position of the rotor 120 and the tooth 104 are output to the detection winding.

(Feature)
As described above, the variable reluctance resolver 100 includes an annular stator core 102 having a plurality of equally shaped teeth 104 arranged at equal pitch angles in the circumferential direction extending from the annular yoke 110 in the radial direction, An insulator 105 attached to the stator core 102 and a connector pin 107 are provided. The connector housing 106 is formed between the inner peripheral edge and the outer peripheral edge of the stator core 102 in the radial direction and is integrally formed with the insulator 105, and the connector pin 107. A winding 103 is not wound around the adjacent teeth 104 but is wound around the other teeth 104 and is not wound around the teeth constituting the shaft multiple angle 1X. It is composed of a phase excitation winding and a two-phase detection winding, and the two-phase detection winding is cos. It has a structure comprising a detecting winding for outputting a detecting winding and sin phase output.

  According to the above structure, the structure in which the winding 103 is not wound around the four teeth 104 located in the vicinity of the connector housing 106 allows the position of the connector housing 106 to overlap the portion to be wound of the teeth 104. Thus, a variable reluctance resolver that does not cause any trouble is obtained.

  In the configuration of the present embodiment, since the winding 103 is not wound on all 32 teeth 104, 1X is not output, but the winding 103 is wound on 7X. The rotation angle accuracy can be sufficiently obtained from the cos output signal and the sin output signal output from the winding for use. That is, the winding 103 is not wound around the teeth 104 constituting the shaft angle multiplier 1X, but the accuracy as the angle detection device can be obtained.

(Other)
Although the above embodiment has been described by taking the outer rotor type as an example, the present invention is not limited to the outer rotor type, and can also be applied to an inner rotor type. In the above embodiment, the case where the rotor is configured with a shaft angle multiplier of 8X has been described as an example. However, the present invention is not limited to this. Moreover, although the case where the shaft double angle 1X is configured by four teeth has been described as an example, the number of teeth that can configure the shaft double angle 1X is not limited to four in the embodiment.

DESCRIPTION OF SYMBOLS 100 ... Variable reluctance type resolver, 101 ... Stator, 102 ... Stator core, 103 ... Winding, 104 ... Teeth, 105 ... Insulator, 106 ... Connector housing, 107 ... Connector pin, 108 ... Slot, 110 ... Yoke, 120 ... Rotor.

Claims (5)

An annular stator core having a plurality of equally shaped teeth arranged at equal pitch angles in the circumferential direction extending radially from the annular yoke;
An insulator mounted on the annular stator core;
A connector portion, disposed between the inner peripheral edge of the stator core and the tip edge of the teeth in the radial direction, and overlapping the adjacent teeth and a slot formed between the teeth; An integrally molded connector housing;
At least the teeth that the connector housing overlaps and the teeth constituting the shaft multiple angle 1X including the teeth are not wound, and the other teeth are wound with windings ,
The winding is composed of a one-phase excitation winding and a two-phase detection winding, and the two-phase detection winding is a detection winding that outputs a cos phase and a detection phase that outputs a sin phase. A variable reluctance resolver comprising a winding.   The variable reluctance resolver according to claim 1, wherein the variable reluctance resolver is an outer rotor type having a plurality of teeth extending radially outward from the annular yoke.   The variable reluctance resolver according to claim 1, wherein the variable reluctance resolver is an inner rotor type having a plurality of teeth extending radially inward from the annular yoke.   The variable reluctance according to any one of claims 1 to 3, wherein the insulator is integrally formed with the stator core by insert molding, and the connector housing is integrally formed simultaneously with the formation of the insulator. Type resolver.   4. The insulator according to claim 1, wherein the insulator includes a separate upper insulator and a lower insulator, and the connector housing is formed integrally with one of the upper insulator and the lower insulator. The variable reluctance resolver according to any one of the above.

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