JP6284908B2 - Stator and resolver using the same - Google Patents

Description

  The present invention relates to an insulator and a resolver using the same.

  Conventionally, a resolver is known as a rotation angle sensor. The resolver includes a stator having a plurality of teeth extending radially from a ring-shaped core, and a rotor disposed to face the teeth of the stator. An excitation winding for inputting an excitation signal and two detection windings for outputting a two-phase signal according to the rotation angle of the rotor are wound around the teeth, and sin signals depending on sin θ are respectively output from the detection windings. Then, a cos signal depending on cos θ is output. The excitation winding and the detection winding are wound around the insulator formed on each tooth while passing through the nozzle of the winding machine through a slot formed between the teeth.

  However, when the resolver is downsized or the number of teeth increases, the slot space becomes smaller, and the nozzle of the winding machine cannot pass well, or the number of windings wound around the teeth cannot be increased. is there.

  For this reason, the stator ring-shaped core is formed into a plurality of stator pieces divided into slots, and the stator pieces wound with the windings are prepared. A resolver stator coupled by means has been proposed (see, for example, Patent Document 1).

  However, a stator having a configuration in which a plurality of stator pieces divided for each slot are coupled by means such as welding has a result that the coupling surface state of the coupling portion is inferior in a close contact state as compared with a configuration composed of one annular core. However, when the magnetic efficiency is deteriorated and used as a resolver, there is a problem that the accuracy of the output signal is poor, and as a result, the angular accuracy is lowered.

  In addition, a configuration is known in which an insulator to be attached to the teeth of the stator is formed for each unit to be attached to each tooth, and a connecting portion of each unit is connected by using an engagement pin or an uneven portion to be connected rotatably. (For example, refer to Patent Documents 2 and 3).

  Insulator structures described in Patent Documents 2 and 3 are connected to each unit in advance, then straighten it and wind the winding around each unit, so there is no slot, and the operation of the nozzle of the winding machine Therefore, there is no problem that the nozzle of the winding machine cannot pass well or the number of windings wound around the teeth cannot be increased.

  However, in the insulator structure of Patent Document 2, since the connecting portion of each unit is connected using an engaging pin, an engaging pin is required as a separate part, and the connection workability of each unit is deteriorated. There is. Further, in each of Patent Documents 2 and 3, the units are connected in a freely rotatable manner, but when the units are connected and the insulator wound with the winding is rounded and attached to the teeth of the stator, the same center position is used. Since each unit is attached to the stator teeth that are arranged radially with the insulator, the angle at which the unit is attached to the teeth cannot be adjusted simply by rotating each unit of the insulator. There is a problem that it cannot be worn well.

JP 2013-062973 A Japanese Patent Laid-Open No. 11-089128 JP-A-2005-006481

  In view of the above-described problems, the present invention is configured such that an insulator to be attached to a tooth of a stator is formed for each unit to be attached to each tooth, and a connecting portion of each unit is rotatably connected. It is an object of the present invention to provide an insulator structure that can be mounted and a resolver using the same.

The present invention is grasped by the following composition in order to achieve the above-mentioned object.
(1) Insulator, comprising a plurality of connected units, each unit being formed at the core, a flange formed at one end of the core, and the other end of the core A connecting portion that connects adjacent units, and the connecting portion is formed on one side and the convex portion of the other adjacent unit is slidably fitted on the other side. And a groove.

(2) A resolver, comprising the insulator described in (1) above.

  According to the present invention, the insulator to be attached to the teeth of the stator is formed for each unit to be attached to each tooth, and the unit can be easily attached to the tooth in a configuration in which the connecting portions of each unit are rotatably connected. It is possible to provide an insulator structure capable of achieving the above and a resolver using the same.

It is the figure of the state which looked at the unit of the insulator concerning this embodiment from the flange side. It is the figure of the state which looked at the unit shown in FIG. 1 from the connection part side. It is a figure which shows the state which connected the unit shown in FIG.1 and FIG.2, comprised the insulator, and was made into linear form. It is a figure which shows a stator core. It is a figure which shows the state which wound the coil | winding around the insulator shown in FIG. 3, and was mounted | worn with the stator core of FIG. It is a figure which shows the resolver using the stator core of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the accompanying drawings. Note that the same number is assigned to the same element throughout the description of the embodiment.

<Embodiment>
An insulator according to an embodiment of the present invention will be described with reference to the drawings. The insulator 10 is formed by connecting a predetermined number of units 1 mounted on teeth 13 of a stator core 11 described later. 1 and 2 are diagrams showing one unit 1, and the unit 1 is formed by injection molding of an insulating resin. The unit 1 has a core part 2, a flange 3 formed at one end of the core part 2, and a connecting part 4 formed at the other end of the core part 2. The flange 3 formed at one end of the core part 2 is formed over the entire circumference of the core part 2, and the connecting part 4 formed at the other end of the core part 2 has a convex portion on one side thereof. 4a and a groove 4b is formed on the other side.

  The connecting portion 4 is formed on both sides in the axial direction, and similarly, a convex portion 4a is formed on one side of the connecting portion 4 and a groove 4b is formed on the other side. The unit 1 is connected by fitting the protrusion 4a formed on the connecting part 4 of one adjacent unit 1 into the groove 4b formed on the connecting part 4 of the other adjacent unit 1, and connecting the teeth 13 The same number of units 1 are connected. The groove 4b is formed in a substantially L shape in this embodiment, and the convex part 4a is slidable in the groove 4b. The groove 4b is not limited to a substantially L shape as long as the convex part 4a can slide in the groove 4b. An opening 5 for inserting the teeth 13 of the stator core 11 is formed in the winding core portion 2.

  FIG. 3 shows an insulator 10 in which 14 units 1 are connected in a straight line.

  Next, the unit 1 is connected to form the insulator 10, and in a state where the insulator 10 is linear, a projection of a jig (not shown) is inserted and set in the opening 5 of the core portion 2 of each unit 1. Then, the winding 18 is wound around the core portion 2 of the unit 1 with a predetermined number of turns by a winding machine (not shown). The connecting wire of the winding 18 is hooked on a pin (not shown) formed on the connecting portion 4 of the unit 1. The winding 18 is composed of an excitation winding and a detection winding, and the excitation winding is wound around the core portion 2 of all units 1 with a predetermined number of turns. The detection winding includes a detection winding that outputs a sin phase and a detection winding that outputs a cos phase. The detection winding that outputs a sin phase and the detection winding that outputs a cos phase each have a predetermined number of turns and a predetermined unit. A winding is wound around one core portion 2. As described above, since the insulator 10 can wind the winding 18 around the core portion 2 of the unit 1 in a straight state, the flexibility of selecting a winding machine that can be used such as a flyer winding machine is high. The effect which becomes. Further, the winding of the windings becomes easy, and the space factor of the windings can be increased.

  Here, the stator core 11 is made of a soft magnetic material such as a silicon steel plate, and includes a plurality of teeth 13 extending radially inward from an annular yoke portion 12 as shown in FIG. A predetermined number of cores having 14 formed thereon are laminated. The teeth 13 are arranged at an equal pitch angle in the circumferential direction, the teeth 13 are straight, and the tips of the teeth 13 do not have a tip portion extending in the circumferential direction. FIG. 4 shows a case where 14 teeth 13 are provided. Thus, since the stator core 11 does not have a structure in which the stator core 11 is divided and integrally formed for each tooth, there is no problem that the magnetic efficiency is deteriorated due to the close contact state between the divided cores as in Patent Document 1.

  When the insulator 10 is mounted on the stator core 11, the insulator 10 of the air-core coil in which the winding 18 is wound around the core portion 2 of each unit 1 is linear. The insulator 13 is attached to the stator core 11 by inserting the teeth 13 of the stator core 11 through the opening 5. When the insulator 10 is mounted on the teeth 13, the angle adjustment for inserting the teeth into the opening of the core part of the unit cannot be performed well only by the rotation of the unit of the insulator 10 around the conventional fulcrum. In this embodiment, since the convex portion 4a can slide in the groove 4b, the angle adjustment for inserting the tooth 13 into the opening 5 of the core portion 2 of the unit 1 can be easily performed. As a result, the effect of facilitating the operation of inserting the unit 1 into the teeth 13 can be achieved, and further, the resolver with a higher winding space factor can be reduced in size.

  FIG. 5 shows a state where the insulator 10 around which the winding 18 is wound is mounted on the stator core 11, and forms the stator 20.

  FIG. 6 shows a variable reluctance resolver using the stator 20 of FIG. On the inner side of the stator 20, a rotor 15 having irregularities formed on the outer periphery is disposed. The rotatable rotor 15 includes a rotor core 16 and a rotor shaft 17. The rotor core 16 is made of a soft magnetic material such as a silicon steel plate, and is configured by laminating a predetermined number of cores having a plurality of convex portions. The rotor core 16 is attached to the rotor shaft 17.

  In the present embodiment, the rotor 15 forms the double shaft angle 2X in which two convex portions are formed, but is not limited to the double shaft angle 2X.

  The present invention is not limited to the above-described embodiments, and includes various modifications, which will be apparent to those skilled in the art from the scope of the claims.

DESCRIPTION OF SYMBOLS 1 ... Unit 2 ... Core part 3 ... Flange 4 ... Connection part 4a ... Convex part 4b ... Groove 5 ... Opening 10 ... Insulator 11 ... Stator core 12 ... Yoke part 13 ... Teeth 14 ... Slot 15 ... Rotor 16 ... Rotor core 17 ... Rotor Shaft 18 ... Winding 20 ... Stator

Claims (2)

A stator core having an annular yoke portion and a plurality of straight teeth fixed to the yoke portion so as to extend radially inward from the yoke portion;
An insulator attached to the teeth of the stator core ;
A stator comprising :
The insulator is
With multiple units connected,
Each unit is
It is one-piece molded
A winding core having an opening through which the entirety of the teeth can be inserted ; and
A flange formed at one end of the core,
A connecting portion that is formed at the other end of the core portion and connects adjacent units;
The connecting portion is
A convex portion formed on one side;
A groove formed on the other side,
Wherein the groove, so as to enable angle adjustment for inserting the tooth into the aperture, stator, wherein the projecting portion of the other adjacent unit is slidably socketed. A resolver comprising the stator according to claim 1.

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