JP5547687B2 - Multistage resolver - Google Patents

Description

  The present invention relates to a multistage resolver in which a plurality of resolver stators are stacked in the vertical direction.

  For example, a resolver is used to detect the rotational position of a brushless motor. Generally, a resolver is comprised from the resolver stator and the resolver rotor arrange | positioned rotatably within this resolver stator. In the resolver stator, a plurality of teeth project from the inner periphery of the resolver stator core, and windings are wound around the teeth. The resolver stator core is provided with a terminal block, and the terminal block is provided with a connection terminal (see, for example, Patent Document 1).

  As shown in FIG. 7, in the resolver disclosed in Patent Document 1, the resolver stator core 81 is provided with a terminal block 81a (described as a terminal portion in Patent Document 1), and a plurality of connections are connected to the terminal block 81a. A terminal 82 (described as a lead wire connection terminal in Patent Document 1) is provided. Each connection terminal 82 is connected to a sensor-side lead wire 82a. Further, an insulator 83 is attached to the outside of the terminal block 81a, and each line connecting terminal 82 is stored in the insulator 83 by the insulator 83 in a state where the line connecting terminal 82 is not exposed to the outside.

  In order to detect the absolute position of the rotational position, a two-stage resolver in which resolvers are stacked in two stages (multistage) has been proposed (see, for example, Patent Document 2).

JP 2008-79470 A Japanese Utility Model Publication No. 5-29283

  By the way, when the resolver of Patent Document 1 is a multistage type in which the resolver stator core 81 is stacked in the vertical direction, the terminal block 81a and the connection terminal 82 of the upper resolver stator core 81 and the terminal block 81a and the connection of the lower resolver stator core 81 are connected. The terminal 82 is disposed so as to overlap in the vertical direction. For this reason, in the multi-stage resolver, it is necessary to stack the connection terminals 82 in the vertical direction and to secure a space for stacking the insulators 83 in the vertical direction, and the vicinity of the terminal block 81a is enlarged in the vertical direction. There has been a problem that the size of the multi-stage resolver is increased in the vertical direction.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a multistage resolver that can be compactly housed by compactly storing the vicinity of the terminal block in the vertical direction. .

In order to solve the above problems, the invention according to claim 1 is provided with a tooth on the inner peripheral side of the resolver stator core, a terminal block on the outer peripheral side of the resolver stator core, and a winding wound around the tooth. And a multistage resolver in which a plurality of resolver stators, each having a connection terminal extending in the vertical direction on the terminal block and having a terminal end of the winding wound around the connection terminal, are stacked in the vertical direction. The upper and lower resolver stators are arranged such that each terminal block is shifted in the circumferential direction of each resolver stator, and a control board is supported on the terminal block of the uppermost resolver stator. resole connection terminals extending from the terminal block of the resolver stator, and Ri is Na is connected a connection terminal extending from the terminal block of the lower of the resolver stator, the lower The resolver stator core has the same shape as the stator and the upper resolver stator, and the lower resolver stator and the upper resolver stator are stacked with one of them reversed upside down with respect to the other. The lower resolver stator and the upper resolver stator are positioned by locking locking portions formed on the terminal blocks, and the locking portions are positioned in the circumferential direction of the terminal block. The lower resolver stator and the upper resolver stator are locked by the locking groove and the diameter stop protrusion arranged in parallel with each other terminal block. and summarized in that that.

  According to the present invention, the physique can be made compact by compactly storing the vicinity of the terminal block in the vertical direction.

The perspective view which shows the two-stage type resolver of embodiment. (A) is a side view which shows a lower resolver stator, (b) is a side view which shows an upper resolver stator. (A) is a top view which shows a lower resolver stator, (b) is a top view which shows an upper resolver stator. The top view which shows the assembly | attachment state of a lower resolver stator and an upper resolver stator. The side view which shows the assembly | attachment state of a lower resolver stator and an upper resolver stator. The top view which shows the two-stage type resolver of embodiment. The perspective view which shows background art.

Hereinafter, an embodiment in which the multistage resolver of the present invention is embodied as a two-stage resolver will be described with reference to FIGS.
As shown in FIG. 1, the two-stage resolver 10 includes a stator portion S formed by stacking a lower resolver stator 20 and an upper resolver stator 30 (uppermost resolver stator) in a cylindrical shape. The two-stage resolver 10 includes a lower resolver rotor R1 disposed on the inner peripheral side of the lower resolver stator 20, and an upper resolver rotor R2 disposed on the inner peripheral side of the upper resolver stator 30. It is to be prepared.

  First, the resolver stator core 21 of the lower resolver stator 20 and the upper resolver stator 30 will be described. As shown in FIGS. 3A and 3B, the lower resolver stator 20 and the upper resolver stator 30 use a common (same shape) resolver stator core 21. The lower resolver stator 20 and the upper resolver stator 30 are each formed by press-fitting a resolver stator core 21 inside a holder H formed in an annular shape from a metal material.

  The resolver stator core 21 is formed in an annular shape from an insulating resin material, and a plurality of teeth 22 are formed on the inner peripheral side thereof in the circumferential direction. Further, a terminal block 23 is formed on the outer peripheral side of the resolver stator core 21 by expanding a part of the circumferential direction of the resolver stator core 21 outward. The terminal block 23 is formed in a thin plate shape and extends in the circumferential direction of the resolver stator core 21 while having a certain width. The terminal block 23 extends to the outside in the radial direction from the outer peripheral surface of the holder H. As shown in FIGS. 2A and 2B, in the terminal block 23, a bulging portion 23 a bulges from the end surface of the terminal block 23 on the end surface on one end side along the circumferential direction of the resolver stator core 21. In addition, a locking groove 21a as a locking portion and a locking projection 21b are juxtaposed in the circumferential direction on the bulging portion 23a.

  Each tooth 22 is provided with an insulator (not shown), and a winding 11 (excitation winding and output winding) is wound through the insulator. As shown in FIGS. 1 and 4, the lower resolver stator 20 and the upper resolver stator 30 are arranged to be relatively moved in the circumferential direction so that the terminal blocks 23 are displaced in the circumferential direction. Further, the lower resolver stator 20 and the upper resolver stator 30 are disposed by turning the upper resolver stator 30 upside down so that the locking grooves 21a and the locking projections 21b of the terminal blocks 23 face each other vertically. .

  As shown in FIGS. 4 and 5, the lower resolver stator 20 and the upper resolver stator 30 are configured such that a part of both terminal blocks 23 are vertically opposed to each other, and a locking groove 21a and a locking protrusion 21b. Is assembled by locking up and down. Therefore, only a part of the terminal block 23 of the upper resolver stator 30 is positioned above the terminal block 23 of the lower resolver stator 20, and the lower resolver is positioned below the terminal block 23 of the upper resolver stator 30. Only a part of the terminal block 23 of the stator 20 is located.

  As shown in FIGS. 2A and 2B, four pin-like lower connection terminals 25 are erected on the terminal block 23 of the lower resolver stator 20 toward the upper resolver stator 30. A pin-like upper connection terminal 26 is erected on the terminal block 23 of the upper resolver stator 30. Therefore, in the side view of the stator part S, the eight connection terminals 25 and 26 are arranged in parallel along the circumferential direction.

  The lower connection terminal 25 and the upper connection terminal 26 have the same length. For the terminal block 23 of the lower resolver stator 20, the lower connection terminal 25 is fixed to the terminal block 23 so that the lower end thereof does not protrude from the end surface (lower surface) of the terminal block 23. Further, the upper connection terminal 26 is fixed to the terminal block 23 with respect to the terminal block 23 of the upper resolver stator 30 such that the upper and lower ends protrude from the upper and lower end surfaces of the terminal block 23. For this reason, the protruding length of the lower connection terminal 25 from the terminal block 23 is longer than the protruding length of the upper connection terminal 26 from the terminal block 23.

  Of the four of the lower connection terminal 25 and the upper connection terminal 26, two are a positive terminal and a negative terminal for supplying a voltage to the excitation winding 11, and the remaining two are output windings. 11 is an output terminal for obtaining an output voltage. Each lower connection terminal 25 is entangled with the end of the winding 11 of the lower resolver stator 20, and each upper connection terminal 26 is entangled with the end of the winding 11 of the upper resolver stator 30. ing. Further, as shown in FIG. 5, in a state where the lower resolver stator 20 and the upper resolver stator 30 are stacked, the upper ends of the lower connection terminals 25 and the upper connection terminals 26 are all positioned at the same height. It has become.

  As shown in FIG. 6, an arc-shaped control board 27 is supported on the terminal block 23 of the upper resolver stator 30, and eight through holes (not shown) formed in the control board 27. The upper ends of the lower connection terminal 25 and the upper connection terminal 26 are inserted through the same. The upper ends of the lower connection terminal 25 and the upper connection terminal 26 are electrically joined to the control board 27 by solder F or socket connection. That is, the control board 27 is shared by the lower resolver stator 20 and the upper resolver stator 30.

  The control board 27 has one plus lead wire L1 for supplying voltage to the plus terminals (excitation winding 11) of the upper and lower connection terminals 25, 26 and the minus of the upper and lower connection terminals 25, 26. One minus lead wire L2 for supplying a voltage to the terminal (excitation winding 11) is electrically connected. That is, the lower resolver stator 20 and the upper resolver stator 30 share the plus lead wire L1 and the minus lead wire L2.

  Further, the control board 27 has two output lead wires L3 connected to the two output terminals (the output winding 11) of the lower connection terminal 25 and two of the upper connection terminal 26, respectively. Two output lead wires L4 connected to each of the output terminals (output winding 11) are connected. The six lead wires L1 to L4 are signal-connected to a signal processing unit (not shown).

  In the two-stage resolver 10 having the above-described configuration, the lower resolver rotor R1 is in a state where the input voltage is input from the plus lead wire L1 and the minus lead wire L2 to the exciting winding 11 through the control board 27. When the gap between the upper resolver rotor R2 and the excitation winding 11 changes, the voltage output from the output winding 11 changes. The change in voltage is detected by the signal processing unit via the output lead wires L3 and L4. The lower resolver stator 20 detects the 1X rotational position of the lower resolver rotor R1, and the upper resolver stator 30 detects the NX rotational position of the upper resolver rotor R2.

Next, the operation of the two-stage resolver 10 will be described.
In the two-stage resolver 10, the terminal blocks 23 of the lower resolver stator 20 and the upper resolver stator 30 are arranged shifted in the circumferential direction of the resolver stators 20 and 30. A control board 27 is supported on the terminal block 23 of the upper resolver stator 30, and an upper connection terminal 26 extending from the terminal block 23 of the upper resolver stator 30 and a terminal block of the lower resolver stator 20 with respect to the control board 27. A lower connection terminal 25 extending from 23 is connected. Therefore, while the two resolver stators 20 and 30 are stacked one above the other, the control board 27 is integrated into one.

According to the above embodiment, the following effects can be obtained.
(1) In the two-stage resolver 10, the terminal blocks 23 of the lower resolver stator 20 and the upper resolver stator 30 are arranged relatively shifted in the circumferential direction of each resolver stator 20, 30, and only a part thereof Are arranged so as to overlap each other. The lower connection terminal 25 and the upper connection terminal 26 of each terminal block 23 are connected to a common control board 27. For this reason, for example, compared with the case where the terminal blocks 23 are stacked one above the other and the control boards are arranged on the lower terminal block 23 and the upper terminal block 23, the vicinity of the terminal block 23 is arranged in the vertical direction. It can be stored compactly, and the physique in the vertical direction of the two-stage resolver 10 can be made compact.

  (2) The lower connection terminal 25 extending from the lower terminal block 23 has a longer protruding length than the upper connection terminal 26 extending from the upper terminal block 23. For this reason, the lower connection terminal 25 and the upper connection terminal 26 can be connected to the common control board 27.

  (3) The plus lead wire L1 and the minus lead wire L2 that are shared by the lower resolver stator 20 and the upper resolver stator 30 are connected to the control board 27. For this reason, compared with the case where the lower lead wire L1 and the negative lead wire L2 are provided in the lower resolver stator 20 and the upper resolver stator 30, respectively, the lead wires connected to the control board 27 can be reduced. Therefore, the two-stage resolver 10 can be reduced in wiring.

  (4) The lower resolver stator 20 and the upper resolver stator 30 share the resolver stator core 21 and the terminal block 23, and the upper resolver stator 30 is used upside down with respect to the lower resolver stator 20. Therefore, the manufacturing cost of the two-stage resolver 10 can be reduced as compared with the case where the resolver stator core 21 is manufactured separately for the lower resolver stator 20 and the upper resolver stator 30.

  (5) As the locking portion, both the locking groove 21a and the locking projection 21b are formed in the terminal block 23. For this reason, even if the resolver stator core 21 is turned upside down, the locking groove 21a and the locking projection 21b can be locked with each other. For example, if only the locking groove 21 a is formed in the resolver stator core 21, the locking protrusion 21 b must be formed in the other resolver stator core 21, and the resolver stator core 21 cannot be made common. Therefore, by forming the locking grooves 21a and the locking projections 21b in the terminal block 23, the upper and lower resolver stator cores 21 can share the configuration of the terminal block 23, and the resolver stator core 21 can also be shared. Therefore, the manufacturing cost of the two-stage resolver 10 can be reduced as compared with the case where the upper and lower resolver stator cores 21 are manufactured in different shapes.

  (6) Two locking grooves 21a and locking protrusions 21b were formed as the locking portions. For this reason, two locking portions of the locking groove 21a and the locking projection 21b are formed, and the positional displacement between the lower resolver stator 20 and the upper resolver stator 30 is reduced, and the lower connection terminal 25 and the upper connection terminal 25 with respect to the control board 27 The connection terminal 26 can be easily assembled.

In addition, you may change the said embodiment as follows.
In the embodiment, the locking groove 21 a and the locking protrusion 21 b are formed on the terminal block 23 of the resolver stator core 21. Good.

  In the resolver stator core 21, either one of the locking groove 21a and the locking protrusion 21b may be formed, and the other of the locking groove 21a and the locking protrusion 21b may be formed in the combined resolver stator core 21. .

In the resolver stator core 21, the locking groove 21a and the locking projection 21b may be omitted.
In the embodiment, the lower resolver stator 20 and the upper resolver stator 30 are positioned by locking the locking grooves 21a and the locking protrusions 21b. However, the terminal blocks 23 may be fixed with screws or the like. The terminal blocks 23 may be bonded and positioned.

The resolver stator core 21 may have different forms for the lower resolver stator 20 and the upper resolver stator 30.
In the embodiment, the lower resolver stator 20 detects the 1X rotational position of the lower resolver rotor R1, and the upper resolver stator 30 detects the NX rotational position of the upper resolver rotor R2. However, the present invention is not limited to this. Absent. That is, the lower resolver stator 20 may detect the NX rotational position of the lower resolver rotor R1, and the upper resolver stator 30 may detect the 1X rotational position of the upper resolver rotor R2.

In the embodiment, the two-stage resolver 10 is embodied. However, a three-stage or more multi-stage resolver may be used.
In the embodiment, the plus lead wire L1 and the minus lead wire L2 are shared by the lower resolver stator 20 and the upper resolver stator 30. However, the plus lead wire L1 and the minus lead wire L2 for the lower resolver stator 20 are connected to the control board 27, and the plus lead wire L1 and the minus lead wire L2 are connected to the upper resolver stator 30. May be. The number of lead wires connected to the control board 27 is not limited to the number described in the embodiment and the above-described configuration, and may be arbitrarily changed.

Next, the technical idea that can be grasped from the above embodiment and other examples will be described below.
(A) The control board is connected with a plus lead wire and a minus lead wire for supplying a voltage to the upper resolver stator and the lower resolver stator, and the plus lead wire and the minus lead wire are The multi-stage resolver according to claim 2 or 3, wherein the upper resolver stator and the lower resolver stator are shared.

  (B) The multi-stage resolver according to claim 3, wherein the locking portion includes both a locking groove and a locking protrusion formed in each terminal block.

  DESCRIPTION OF SYMBOLS 10 ... Two-stage resolver as a multistage resolver, 11 ... Winding, 20 ... Lower resolver stator, 30 ... Upper resolver stator as uppermost resolver stator, 21 ... Resolver stator core, 21a ... Engagement as a locking part Stop groove, 21b... Locking projection as a locking portion, 22... Teeth, 23... Terminal block, 25... Lower connection terminal, 26.

Claims (1)

A tooth is provided on the inner peripheral side of the resolver stator core, a terminal block is provided on the outer peripheral side of the resolver stator core, a winding is wound around the teeth, and a connection terminal extending in the vertical direction is provided on the terminal block. A multi-stage resolver in which a plurality of resolver stators in which the terminal ends of the windings are entangled with the connection terminals are vertically stacked,
The upper and lower resolver stators are arranged by shifting each terminal block in the circumferential direction of each resolver stator, and a control board is supported on the terminal block of the uppermost resolver stator, with respect to the control board. connection terminals extending from the terminal block of the resolver stator, and Ri Na connection terminal is connected to extend from the terminal block of the lower of the resolver stator,
The lower resolver stator and the upper resolver stator have the same shape as the resolver stator core, and either the lower resolver stator or the upper resolver stator is vertically inverted with respect to the other. Are stacked,
The lower resolver stator and the upper resolver stator are positioned by locking the locking portions formed on the terminal blocks of each other,
The locking portion includes a locking groove and a locking projection arranged in parallel in the circumferential direction of the terminal block, and the lower resolver stator and the upper resolver stator are arranged in parallel to each other terminal block. A multistage resolver that is locked by a locking groove and a diameter stop projection .

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