JP2016151430A - Resolver device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resolver device capable of improving a degree of freedom in the layout of a connector portion.SOLUTION: A resolver device is equipped with two resolvers of a resolver RA and a resolver RB. Each of resolvers RA, RB has each stator coaxially provided to an axis of each rotor and formed with a plurality of teeth, and each of resolver coils 14, 24 wound around each teeth. The resolver device is equipped with: a connector portion 10 integrally provided to the resolver RB of the resolvers RA and RB, and enabling electric connection with an external connection terminal; and a connecting portion 26 enabling the electric connection of each of the resolver coils 14, 24 and the connector portion 10 in each of the resolver RA, RB, through coupling of the resolver RB and the resolver RA.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a resolver device.

  2. Description of the Related Art A resolver device including a plurality of resolvers that output a plurality of phase voltage signals according to the rotation angle of a rotor is known. For example, as a twin resolver having two resolvers, the one described in Patent Document 1 is known. Patent Document 1 discloses providing a terminal portion (connector portion) for each of two resolvers. And each terminal part (connector part) of two resolvers is enabling coupling | bonding of the signal to the exterior by couple | bonding with another connector part.

JP 2013-156144 A

  By the way, in the twin resolver of Patent Document 1, in order to enable transmission / reception of signals to / from the outside, not only a terminal portion provided in each of the two resolvers but also a connector portion for coupling them is required. . Therefore, if the arrangement of the connector section is changed, the configuration of the two resolvers itself (the terminal section) will be changed. Even if the arrangement of the connector section is changed, it will not be easily realized. The degree of freedom is poor.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a resolver device that can increase the degree of freedom of the arrangement of the connector portion.

  In order to solve the above-described problems, the resolver device includes a plurality of resolvers that are provided coaxially with the axis of the rotor and have a stator formed with a plurality of teeth and a resolver coil wound around each tooth. A connector unit that is provided integrally with any one of the plurality of resolvers and enables electrical connection between each resolver and the external connection terminal, and a specific resolver and other resolvers. Through the coupling, a resolver coil of each resolver and a connection portion that enables electrical connection between the connector portion are provided.

  According to the above configuration, when the arrangement of the connector portion is changed, it is only necessary to change the configuration of a specific resolver in which the connector portion is provided integrally. As a result, when the arrangement of the connector portion is changed, the change of the configuration is suppressed to reach resolvers other than the specific resolver, and the change of the arrangement of the connector portion can be easily realized. Therefore, the connector part can be laid out freely, and the degree of freedom of arrangement of the connector part can be improved.

  In the above resolver device, the connection unit has a plurality of terminals that enable electrical connection between the resolver coil of each resolver and the connector unit through the coupling of the specific resolver and the other resolver. Among these terminals, an excitation terminal for supplying excitation power to each resolver and a short-circuit terminal for short-circuiting between the resolvers are preferably shared by the resolvers.

  According to the above configuration, the total number of terminals for enabling the electrical connection between the resolver coils of the plurality of resolvers and the connector portion is compared with the case where the excitation terminals and the short-circuit terminals are not shared between the plurality of resolvers. Will be reduced. That is, in this case, since the cause of failure can be reduced, the occurrence rate of failure can be reduced.

  Further, in the resolver device, the connector part and the connection part are integrally formed, and the connection part is formed so as to protrude in a direction perpendicular to the radial direction of the stator in the specific resolver. It is preferable that the resolver other than the resolver has an insertion portion that is coupled to a specific resolver by inserting the connection portion.

  According to the said structure, the structure which enables the electrical connection of the resolver coil of several resolvers and a connector part will be constructed | assembled in the direction orthogonal to the radial direction of a stator by a connection part. Thereby, in a resolver apparatus, size reduction to the radial direction of a stator is realizable.

  In the resolver device, the connector portion and the connection portion are formed integrally with the insulator in the specific resolver, and the insertion portion is formed integrally with the insulator in the resolver other than the specific resolver.

  According to the above configuration, since there is no need to assemble a specific resolver and other resolvers alone, there is no tolerance due to the assembly of the resolver alone. Thereby, the precision error by the assembly of the resolver unit can be reduced.

  According to this invention, the freedom degree of arrangement | positioning of a connector part can be raised.

The front view which shows a resolver apparatus. FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. In FIG. 1, the front view seen from the arrow 3 direction. The front view seen from the arrow 4 direction in FIG. The front view which shows the process of an assembly of a resolver apparatus. 6-6 sectional drawing in FIG. The figure which shows typically the electrical structure in a resolver apparatus. (A)-(c) is sectional drawing which shows another example of arrangement | positioning or a shape of a connector part. (A), (b) is sectional drawing which shows another example of the block part in a connection part. (A)-(d) is sectional drawing which shows another example of fitting of a connection part and an insertion part. The perspective view which shows another example of the resolver apparatus provided with three resolvers.

Hereinafter, an embodiment of the resolver device will be described.
As shown in FIGS. 1 to 4, the resolver device is of a twin resolver type including two resolvers. For example, a torque sensor that detects a torsion amount of a torsion bar or a steering that detects a rotation angle of a steering shaft. It is used as a sensor.

  The resolver device is formed by coupling (connecting) a resolver RA and a resolver RB in the axial direction (left-right direction in FIG. 1). In each resolver RA and RB, two-phase resolver coils (windings) arranged at equal intervals in the circumferential direction by energizing excitation current (excitation power) from a power supply source such as an inverter outside the resolver device. Each voltage is induced. Each resolver RA, RB outputs a sensor signal having a different phase of amplitude change (in this case, shifted by 90 °) based on the voltage thus induced. That is, when one sensor signal outputs a sin waveform signal, the other sensor signal shifted by 90 ° outputs a cos waveform signal.

  In particular, as shown in FIGS. 2 to 4, each resolver RA, RB includes cylindrical rotors 11, 21 fitted to the outer peripheral surface of a rotation shaft provided to be rotatable around an axis m, and Ring-shaped stators 12 and 22 provided coaxially on the axes of the rotors 11 and 21 are provided. Each of the rotors 11 and 21 is formed by stacking electromagnetic steel plates having a predetermined number of salient pole portions formed on the outer periphery thereof.

  A plurality of T-shaped teeth 13, 23 project from the inner circumferences of the stators 12, 22 toward the rotors 11, 21 at equal intervals in the circumferential direction. Resolver coils 14 and 24 are wound around the teeth 13 and 23, respectively. The resolver coil 14 is wound around each tooth 13 by combining an exciting coil 14a through which an exciting current is passed and two-phase output coils 14b and 14c in which voltages having different phases of amplitude change are induced in a predetermined combination. . The resolver coil 24 is wound around each tooth 23 by combining an exciting coil 24a through which an exciting current is passed and two-phase output coils 24b and 24c in which voltages having different phases of amplitude change are induced in a predetermined combination. Is done. That is, each resolver RA, RB outputs the voltage induced in the two-phase output coil of each resolver coil 14, 24 as a sensor signal. Each of the stators 12 and 22 is formed by stacking electromagnetic steel plates on which the respective teeth 13 and 23 are formed.

  The resolver device includes output terminals Out1 and Out3 that output sensor signals from the resolver RA, output terminals Out2 and Out4 that output sensor signals from the resolver RB, and excitation terminals that input (supply) excitation current to the resolvers RA and RB. In5, a connector portion 10 having a short-circuit terminal Com6 for short-circuiting between the terminals Out1 to Out4 and In5 is provided. The connector unit 10 is provided integrally with a resolver RB as a specific resolver, and is provided so that a connection port 10a with an external connection terminal 50 opens in the radial direction of the resolver RB (resolver device). That is, the external connection terminal 50 is connected to the connector portion 10 from the side where the connection port 10a is opened and from the outside in the radial direction of the resolver RB.

Here, the configuration of the resolver RB will be described in detail.
As shown in FIGS. 1 to 3, the stator 22 in the resolver RB is molded by an insulator 25 made of an insulating material such as a resin material. A connector portion 10 made of the same material as the insulator 25 is extended from the insulator 25 toward the outer side in the radial direction. The connector portion 10 is provided with a connecting portion 26 made of the same material as the insulator 25 and the connector portion 10 in the axial direction (resolver RA side). The connecting portion 26 has a projecting portion 26a having a quadrangular shape in cross-section projecting on both sides orthogonal to the extending direction (axial direction of the rotating shaft) along the extending direction of the connecting portion 26 (axial direction of the rotating shaft). Formed continuously.

  In particular, as shown in FIGS. 1 and 2, the connector unit 10 and the connection unit 26 include a RAsin output pin 31, an RBsin output pin 32, a RAcos output pin 33, which are connected to the terminals Out1 to Out4, In5, and Com6. An RBcos output pin 34, an excitation input pin 35, and a short-circuit pin 36 are embedded. The RAsin output pin 31 is electrically connected to the output terminal Out1. The RBsin output pin 32 is electrically connected to the output terminal Out2. The RAcos output pin 33 is electrically connected to the output terminal Out3. The RBcos output pin 34 is electrically connected to the output terminal Out4. The excitation input pin 35 is electrically connected to the excitation terminal In5. The short-circuit pin 36 is electrically connected to the short-circuit terminal Com6. The RAsin output pin 31 and the RAcos output pin 33 extend in a straight line along the axial direction of the rotation shaft, and have respective lengths such that the tips 31a and 33a protrude from the resolver RA side in the connection portion 26. The RBsin output pin 32 and the RBcos output pin 34 extend linearly along the axial direction of the rotation shaft, and have lengths at which the respective tips 32a and 34a protrude from the resolver RB side in the connecting portion 26. The excitation input pin 35 and the short-circuit pin 36 extend in a straight line along the axial direction of the rotation axis, and have lengths at which the respective tips 35a and 36a protrude from both sides of the resolver RA and the resolver RB in the connection portion 26. .

  The resolver RB is integrally formed by insert molding in a state where the stator 22, the terminals Out1 to 4, In5 and Com6, and the pins 31 to 36 are arranged at predetermined positions. That is, the connector part 10 and the connection part 26 are integrally formed with the resolver RB and are integrally formed with the insulator 25 together with the stator 22.

  In particular, as indicated by phantom lines in FIG. 3, the RBsin output pin 32 and the RBcos output pin 34 are wound around a predetermined tooth 23 so as to have a phase difference of 90 ° of the resolver coil 24. One ends of the lead wires of the phase output coils 24b and 24c are respectively connected from the outside of the resolver device (opposite to the resolver RA). The other ends of the lead wires of the two-phase output coils 24b and 24c are connected to the short-circuit pin 36 from the outside of the resolver device. Also, one end of the lead wire of the excitation coil 14a wound around each tooth 23 of the resolver coil 24 is connected to the excitation input pin 35 from the outside of the resolver device. The other end of the lead wire of the exciting coil 14a is connected to the shorting pin 36 from the outside of the resolver device.

Next, the configuration of the resolver RA will be described in detail.
As shown in FIGS. 1, 2, and 4, the stator 12 in the resolver RA is molded by an insulator 15 made of an insulating material such as a resin material. An insertion portion 40 made of the same material as that of the insulator 15 is extended from the insulator 15 toward the outer side in the radial direction. The insertion portion 40 is formed with a cutout hole 40a that allows the projection and recess 26a of the connection portion 26 to be fitted into the projections 26a by being cut out in the radial direction into the shape of the connection portion 26 in the resolver RB. The In the cutout hole 40a, insertion grooves 40b into which the protruding portions 26a are fitted from the axial direction are formed on both sides in the circumferential direction of the resolver RA on the inner peripheral surface thereof. Each insertion groove 40b is a groove cut out in the cross-sectional shape of each protrusion 26a, and is formed along the axial direction of the resolver RA so as to face each protrusion 26a. The insulator 15 is provided with a spacer portion 15a extending in the axial direction (resolver RB side) to maintain a gap between the insulator 15 and the resolver RB. The tip 15b of the spacer portion 15a is in contact with the insulator 25 in the resolver RB. The resolver RA is integrally formed by insert molding in a state where the stator 12 is disposed at a predetermined position. That is, the insertion portion 40 is formed integrally with the resolver RA and is also formed integrally with the insulator 15 together with the stator 12.

  In particular, as indicated by phantom lines in FIG. 4, the RAsin output pin 31 and the RAcos output pin 33 are wound around a predetermined tooth 13 so as to have a phase difference of 90 ° of the resolver coil 14. One ends of the lead wires of the phase output coils 14b and 14c are respectively connected from the outside of the resolver device (opposite the resolver RB). The other ends of the lead wires of the two-phase output coils 14b and 14c are respectively connected to the short-circuit pin 36 from the outside of the resolver device. In addition, one end of the lead wire of the excitation coil 14 a wound around each tooth 23 of the resolver coil 14 is connected to the excitation input pin 35 from the outside of the resolver device. The other end of the lead wire of the exciting coil 14a is connected to the shorting pin 36 from the outside of the resolver device.

  As shown in FIGS. 5 and 6, the resolver device is assembled by combining a resolver RA and a resolver RB. For the connection between the resolver RA and the resolver RB, the resolver RB is moved in the direction of the arrow (the direction in which the resolver RB is moved). Requires only one mechanical step of fitting. As one mechanical step, each protruding portion 26a of the connecting portion 26 is fitted through a sliding operation into the insertion groove 40b in the cutout hole 40a. Subsequently, the coupling between the resolver RA and the resolver RB is completed in a state where the tip 15b of the spacer portion 15a in the resolver RA hits the insulator 25 in the resolver RB and a predetermined gap is secured. After the resolver RA and the resolver RB are coupled, both ends of the lead wires of the respective resolver coils 14 and 24 are connected to corresponding ones of the pins 31 to 36 protruding to the respective sides, so that the resolver The assembly of the device is completed. And the external connection terminal 50 will be connected with respect to the connector part 10 in a resolver apparatus from the connection port 10a side.

Next, as shown in FIG. 7, the electrical configuration in a state where the resolver RA and the resolver RB are combined and the resolver device is assembled will be described in more detail.
The resolver coils 14 and 24 in the resolvers RA and RB are electrically connected to the external connection terminal 50 by pins 31 to 36 (terminals Out1 to Out4, In5 and Com6) embedded in the connector unit 10 and the connection unit 26, respectively. Connected to.

  One end of each excitation coil 14a, 24a is connected to a common excitation input pin 35 (both ends 35a, 35a) embedded in the connector portion 10 and the connection portion 26. That is, when the external connection terminal 50 is connected to the connector unit 10, the energization of each of the excitation coils 14 a and 24 a in each resolver RA and RB is made via the common excitation terminal In 5 and the common excitation input pin 35. It is done together.

  One end of each output coil 14b, 24b arranged orthogonal to each excitation coil 14a, 24a is connected to each dedicated sin output pin 31, 32 (tip 31a, 32a). Each of the output coils 14b and 24b outputs a sensor signal having a sine waveform with an amplitude corresponding to the rotation angle θ of each of the rotors 11 and 21 in the positional relationship with the respective excitation coils 14a and 24a. One end of each output coil 14c, 24c arranged in parallel to each exciting coil 14a, 24a is connected to each dedicated cos output pin 33, 34 (tip 33a, 34a) embedded in the connector part 10 and the connection part 26. ). Each of the output coils 14c and 24c outputs a sensor signal having a cosine waveform with an amplitude corresponding to the rotation angle θ of each of the rotors 11 and 21 in the positional relationship with each of the excitation coils 14a and 24a. That is, by connecting the external connection terminal 50 to the connector unit 10, the sin waveform sensor signal and the cos waveform sensor signal are externally transmitted from the resolvers RA and RB via the output pins 31 to 34, respectively. It is taken in by a control device or the like. The sensor signal thus captured is further processed to be used for torque detection based on the relative rotation angle of the rotating shaft and steering angle detection based on the absolute rotation angle of the rotating shaft.

  For the resolver coil 14 (14a, 14b, 14c), 24 (24a, 24b, 24c), the other end not connected to the pins 31 to 35 is a common short-circuit pin embedded in the connector unit 10 and the connection unit 26. 36 (both ends 36a, 36a). That is, when the external connection terminal 50 is connected to the connector unit 10, the short-circuit processing of the resolver coils 14 and 24 in each resolver RA and RB is performed via the common short-circuit terminal Com 6 and the common short-circuit pin 36. It is done collectively.

According to the resolver apparatus demonstrated above, the effect | action and effect shown to the following (1)-(7) can be acquired.
(1) As shown in FIGS. 1 and 2, the configuration for enabling electrical connection with the external connection terminal 50, that is, the connector unit 10 having the terminals Out <b> 1 to Out <b> 4, In <b> 5, and Com <b> 6, has each resolver. It was decided to be provided integrally only in one resolver RB of RA and RB. That is, in this case, when the arrangement of the connector unit 10 is changed, it is only necessary to change the configuration of the resolver RB in which the connector unit 10 is integrally provided.

  For example, as shown in FIG. 8 (a), the change in the arrangement of the connector unit 10 includes a configuration of the resolver RA even when moving in the axial direction of the resolver RB (resolver RA side). Changes can be minimized (no change in this example).

  As a result, when the arrangement of the connector unit 10 is changed, the change of the configuration is prevented from reaching the resolver RA other than the resolver RB, and the change of the arrangement of the connector unit 10 is easily realized. Therefore, the connector part 10 can be laid out freely, and the freedom degree of arrangement | positioning of the connector part 10 can be improved.

  (2) Furthermore, the connector unit 10 provided integrally with the resolver RB includes terminals Out1 to Out4, In5, and Com6 for allowing the resolvers RA and RB to be electrically connected to the external connection terminal 50. It has been aggregated. That is, in this case, the number of connector portions 10 mounted as a resolver device is substantially reduced to one (minimum number). Therefore, compared with the case where a plurality of connector portions are provided, the wiring related to each of the terminals Out1 to 4, In5 and Com6 used for electrical connection with the external connection terminal 50 can be simplified, and is affected by the wiring loss. It is difficult to obtain a stable output that has low impedance and does not adversely affect the electromotive force.

  (3) The connector portion 10 provided integrally with the resolver RB and the connection portion 26 provided integrally therewith not only include the terminals Out1 to 4, In5 and Com6, but also the pins 31 to 36. Yes. Therefore, compared to the case where a plurality of connector portions are provided, the space can be used effectively, which contributes to the downsizing of the resolver device.

  (4) As shown in FIG. 7, an excitation terminal In5 for supplying excitation current to each resolver RA, RB (each excitation coil 14a, 24a) and each resolver RA, RB (each resolver coil 14, 24) The short-circuit terminal Com6 for short-circuiting between them is made common between the resolvers RA and RB. As a result, the number of terminals in the connector section 10 is six in total, that is, the terminals Out1 to Out4, In5, and Com6.

  On the other hand, when the excitation terminals and the short-circuit terminals are not shared between the resolvers RA and RB, the excitation terminals and the short-circuit terminals are required for each resolver in addition to the terminals Out1 to Out4. That is a total of eight.

  Therefore, when the excitation terminal In5 and the short-circuit terminal Com6 are shared between the resolvers RA and RB, the resolver coils 14 and 24 and the connector unit 10 in each resolver RA and RB can be electrically connected. The total number of terminals decreases as compared with the case where the excitation terminals and the short-circuit terminals are not shared between the resolvers RA and RB. That is, in this case, since the cause of failure can be reduced, the occurrence rate of failure can be reduced.

  (5) A configuration that enables electrical connection between the resolver coils 14 and 24 and the connector portion 10 in each resolver RA and RB is constructed in a direction orthogonal to the radial direction of the stator 22 of the resolver RB by the connection portion 26. Will be. Thereby, in a resolver apparatus, size reduction to the radial direction of the stator 22 in the resolver RB is realizable.

  (6) The connector portion 10 and the connection portion 26 are formed integrally with the stator 22 and the insulator 25 and the resolver RB. Further, the insertion portion 40 that fits with the connection portion 26 when the resolvers RA and RB are coupled is formed integrally with the insulator 15 and the resolver RA together with the stator 12. Therefore, it is not necessary to assemble each resolver RA, RB alone, so that there is no tolerance due to the assembly of the resolver alone. Thereby, the precision error by the assembly of the resolver unit can be reduced.

  (7) As shown in FIGS. 5 and 6, in the assembly of the resolver device, the connection part 26 in the resolver RB is fitted into the cutout hole 40 a of the insertion part 40 in the resolver RA for the connection between each resolver RA and the resolver RB. Only one process is required. Therefore, as compared with a resolver device in which a terminal portion (connector portion) is provided in each resolver and these are further coupled to another connector portion as in the prior art (for example, Patent Document 1), the resolver device is assembled. The tolerance that is superimposed by is reduced. Thereby, it is possible to reduce an accuracy error due to a tolerance due to assembly of the resolver device.

In addition, the said embodiment can also be implemented with the following forms.
The position or shape of the connector part 10 can be changed as appropriate. For example, as shown in FIG. 8A, the connector portion 10 can also move its position in the axial direction of the resolver RB (resolver RA side). Further, as shown in FIGS. 8B and 8C, the connector portion 10 has its connection port 10a opened to the axial direction side of the resolver RB, and the axial direction in the resolver device (resolver RB side, resolver RA). The external connection terminal 50 can also be connected from the side. Even when the position or shape of the connector unit 10 is changed in this way, the configuration of changing to the resolver RA other than the resolver RB is suppressed, and effective use of space according to the mounting situation of the resolver device, etc. Can be effective.

  -The shape of the protrusion part 26a in the connection part 26 can be changed suitably. For example, as shown in FIG. 9A, the cross-sectional view may be triangular, and in this case, each insertion groove 40b is cut out in a cross-sectional view. Further, as shown in FIG. 9 (b), a semicircular shape in cross section may be formed, and in this case, each insertion groove 40b is cut out in a semicircular shape in cross section.

  -The fitting structure of the connection part 26 and the insertion part 40 (cutout hole 40a) can be changed suitably. For example, as shown to Fig.10 (a), the connection part 26 may have comprised convex shape, and the cutout hole 40a will be cut out by convex shape in this case. Moreover, as shown in FIG.10 (b), the connection part 26 may have comprised the rectangle (square) shape, and the cut-out hole 40a will be cut out in a rectangle (square) shape in this case. Further, as shown in FIG. 10C, the connection portion 26 may have a shape that sandwiches the insertion groove 40b in the insertion portion 40 in the axial direction of the resolver RB. In this case, the cutout hole 40a is the cutout hole. The insertion groove 40b is cut out from 40a so as to be left protruding. Further, as shown in FIG. 10 (d), the connecting portion 26 may have a shape in which the protruding portion 26a is formed inward in the radial direction of the resolver RB. In this case, the cutout hole 40a is The cutout hole 40a is cut out in such a shape that the radially inner side is cut out.

  Each of the resolvers RA and RB may have a configuration that enables connection with the resolver coils 14 and 24 by being mechanically coupled. This contributes to simplification of the process of assembling the resolver device.

  -The connector part 10 should just be provided integrally only in one resolver among each resolver RA and RB, and about the connector part 10 itself, it may be constructed | assembled by the assembly of a several member. For example, it is possible to assemble the resolver RB by sandwiching the stator 22 from its axial direction after resin molding of the two parts constituting the connector part 10, the connection part 26 and the insulator 25. In this case, the connection part 26 may be comprised as another component. Moreover, after resin-molding two parts which comprise the insertion part 40 and the insulator 15, the stator 12 may be inserted | pinched from the axial direction and the resolver RA may be assembled. In this case, the insertion part 40 may be comprised as another component.

  The configuration of the connection portion 26 and the insertion portion 40 may be interchanged, and the connector portion 10 is provided with a configuration corresponding to the insertion portion 40 in the resolver RA, while the resolver RA corresponds to the connection portion 26 in the resolver RB. A configuration may be provided. In this case, the terminals Out1 to Out4, In5, and Com6 are integrally provided in the resolver RB, while the pins 31 to 36 are integrally provided in the resolver RA.

  The configuration of the insertion portion 40 may be omitted, and the connection portion 26 may be separated from the connector portion 10 and the connection portion 26 may be provided integrally with the resolver RA. In this case, it is only necessary to allow the concave-convex fitting between the connection portion 26 and the connector portion 10. In addition, the connection part 26 may not be provided integrally with any of the resolvers RA and RB. In this case, it is only necessary to allow the uneven fitting between the connecting portion 26 and the connector portion 10 and between the connecting portion 26 and the insertion portion 40.

  In the above-described embodiment, the excitation terminal In5 and the short-circuit terminal Com6 and the excitation input pin 35 and the short-circuit pin 36 related to them are shared between the resolvers RA and RB. . For example, between the resolvers RA and RB, only the terminals are shared, only the pins are shared, or only the excitation terminal In5 and the excitation input pin 35 are shared. Alternatively, only the short-circuit terminal Com6 and the short-circuit pin 36 may be shared.

  The excitation terminal In5 and the short-circuit terminal Com6 and the excitation input pin 35 and the short-circuit pin 36 related to them may not be shared between the resolvers RA and RB, and even in this case, the effect (1) above is achieved. At least.

  In the above embodiment, two resolvers are provided. However, if there are a plurality of resolvers, three or four or more may be provided. As a result, a resolver device with an expanded function such as ensuring the redundancy of the resolver device and improving detection accuracy is realized. For example, as shown in FIG. 11, when a third resolver RC is provided in addition to the resolvers RA and RB, the connection part is extended from the resolver RB provided with the connector part 10 to the first resolver RB. The connection portion 60 having the first connection body 61 and the second connection body 62 extended to the second resolver RC may be used. In this case, in addition to the terminals Out1 to Out4, In5, and Com6, the connector unit 10 is provided with output terminals Out5 and Out6 that output a sensor signal having a sin waveform or a cos waveform from the resolver RC. Further, the insertion portion 41 in the resolver RA is formed with a cutout hole 41a and an insertion groove 41b through which the first connection body 61 and the second connection body 62 can be inserted. The insertion portion 42 in the resolver RC is formed with a cutout hole 42a and an insertion groove 42b through which the second connection body 62 can be inserted. Further, the RAsin output pin 71 electrically connected to the output terminal Out1 and the RAcos output pin 72 electrically connected to the output terminal Out3 are embedded in the first connection body 61, respectively. An RCsin output pin 73 electrically connected to the output terminal Out5 and an RCcos output pin 74 electrically connected to the output terminal Out6 are embedded in the second connection body 62, respectively. In the first connection body 61 and the second connection body 62, the excitation input pin 35 and the short-circuit pin 36 are both embedded in a bifurcated state. Thus, even when the function is expanded to a resolver device having three resolvers to ensure redundancy and improve detection accuracy, the connector portion is integrated only with a specific resolver as in the above embodiment. If provided, an effect equivalent to that of the above embodiment can be obtained, such as reducing the number of terminals of each terminal used for electrical connection with the external connection terminals, as compared with the case where a plurality of connector portions are provided. If the configuration described above is followed, a resolver device including four or more resolvers can be realized.

-As a resolver apparatus, you may use as a rotation angle sensor which detects the rotation angle of a motor.
Next, a technical idea that can be grasped from the above-described embodiment and another example (modification) will be additionally described below.

  (A) The resolver device is assembled by connecting the resolver coil in each resolver to the connection portion after the specific resolver and the other resolver are coupled via the connection portion. . According to this configuration, as compared with a resolver device that is provided with a terminal portion (connector portion) in each resolver and is coupled to another connector portion and assembled as in the prior art, it is superimposed by assembly of the resolver device. Tolerances will be reduced. Thereby, it is possible to reduce an accuracy error due to a tolerance due to assembly of the resolver device.

  Out1 to Out4 ... output terminal, In5 ... excitation terminal, Com6 ... short circuit terminal, RA, RB ... resolver, 10 ... connector part, 11, 21 ... rotor, 12, 22 ... stator, 13, 23 ... teeth, 14 (14a, 14b, 14c), 24 (24a, 24b, 24c) ... resolver coils (excitation coils, two-phase output coils), 15, 25 ... insulators, 26 ... connection parts, 40 ... insertion parts.

Claims (4)

A plurality of resolvers having a stator provided coaxially on the axis of the rotor and formed with a plurality of teeth, and a resolver coil wound around each tooth,
A connector unit that is provided integrally with any particular resolver among a plurality of resolvers, and enables electrical connection between each resolver and an external connection terminal;
A connection part that enables electrical connection between the resolver coil of each resolver and the connector part through the coupling between the specific resolver and the other resolver;
A resolver device comprising: The connection portion has a plurality of terminals that enable electrical connection between the resolver coil and the connector portion of each resolver through the coupling between the specific resolver and the other resolver.
The excitation terminal for supplying excitation power to each resolver among the plurality of terminals and the short-circuit terminal for short-circuiting between the resolvers are shared between the resolvers. The resolver device according to 1. The connector part and the connection part are configured integrally.
The connection portion is formed so as to protrude in a direction perpendicular to the radial direction of the stator in the specific resolver,
The resolver device according to claim 1, wherein a resolver other than the specific resolver has an insertion portion that is coupled to the specific resolver by inserting the connection portion. The connector part and the connection part are formed integrally with the insulator and the stator in the specific resolver,
The resolver device according to claim 3, wherein the insertion portion is formed integrally with the insulator together with the stator in a resolver other than the specific resolver.