JP2011214928A - Resolver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resolver which can prevent breakage by centrifugal force even if a rotor is rapidly spun at 20,000 rpm or more and is excellent in blocking noise.SOLUTION: The resolver 1 includes an annular rotor 3 and an annular stator 2 concentric with the rotor 3 and disposed outside the rotor 3. A resin-molded wiring part of the rotor 3 (a resolver wiring 4a part and a transformer wiring 4b part) is covered by rolling string-like carbon fibers (6a and 6b) with epoxy resin impregnated.

Description

  The present invention relates to a resolver attached to an automobile test apparatus.

  In many cases, a resolver is attached to an automobile test apparatus in order to detect the rotational speed of its rotating shaft. Here, the rotating shaft of the automobile test apparatus rotates at a high speed, for example, at a rotational speed of 20000 rpm or more. Since the resolver rotor is attached (fixed) to the rotating shaft of the automobile test apparatus, the resolver rotor also rotates at a high speed of 20000 rpm or more. Therefore, a large centrifugal force acts on the resolver rotor.

  On the other hand, as a technique related to the resolver, there is a technique described in Patent Document 1, for example. Patent Document 1 describes a technique in which at least one of a resolver stator or rotor is molded with resin. Thus, Patent Document 1 states that a built-in type resolver having a waterproof function can be realized.

JP 2006-138807 A

  Here, as described in Patent Document 1, by molding the inside of the rotor of the resolver with resin, not only a waterproof function is obtained, but also the durability of the rotor against centrifugal force is improved to some extent. However, when the resolver rotor rotates at a high speed of 20000 rpm or more, the resin mold is destroyed by centrifugal force. As the destruction progresses, the winding begins to rub, and the resolver cannot detect the rotation angle of the rotating shaft (rotation). Speed can no longer be detected). Further, in the resolver attached to the automobile test apparatus, there is a problem that even if the inside of the resolver rotor is molded with resin, it is vulnerable to noise from the outside (for example, an electric motor as a specimen).

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a resolver that can prevent the destruction of centrifugal force even when the rotor is rotated at a high speed of 20000 rpm or more and is excellent in noise shielding properties. That is.

  As a result of intensive studies to solve the above problems, the present inventors have found that the above problems can be solved by covering the winding portion of the rotor with the carbon fibers while impregnating the carbon fibers with the resin. Thus, the present invention has been completed.

  That is, the present invention is a resolver attached to an automobile testing apparatus, comprising: an annular rotor; and an annular stator that is concentric with the rotor and disposed outside the rotor, and the winding portion of the rotor is The resolver is covered with a carbon fiber reinforced with resin.

  Here, the carbon fiber has low elasticity and does not stretch. And it is conductive and light. Moreover, the strength of the carbon fiber reinforced with resin is high. According to this configuration, the strength of the winding portion of the rotor does not easily decrease even when the rotor is rotated at a high speed of 20000 rpm or more by covering the winding portion of the rotor with carbon fiber reinforced with resin. That is, even if the rotor is rotated at a high speed at 20000 rpm or more, the centrifugal force breakage of the winding portion can be prevented. Moreover, since carbon fiber has electroconductivity, it is excellent also in noise shielding.

  In the present invention, the winding portion is preferably wound with a string-like carbon fiber impregnated with resin.

  According to this configuration, by using the string-like carbon fiber, the winding portion of the rotor can be easily covered, and the strength reduction of the winding portion of the rotor can be further suppressed.

  According to the present invention, by covering the winding portion of the rotor with carbon fiber reinforced with resin, in particular, centrifugal force breakage can be prevented even if the rotor is rotated at a high speed of 20000 rpm or more, and noise. The shielding property can be improved.

It is a figure which shows the resolver which concerns on one Embodiment of this invention. It is detail drawing of the rotor shown in FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. Fig.1 (a) is a front view of the resolver 1, FIG.1 (b) is AA sectional drawing of Fig.1 (a).

  The configuration of the resolver 1 will be described with reference to FIG. As shown in FIG. 1, the resolver 1 includes an annular rotor 3 and an annular stator 2 that is concentric with the rotor 3 and disposed outside the rotor 3. A plurality of slot holes 3 a and an annular groove 3 b are provided on the outer periphery of the rotor 3. A conducting wire is inserted into the slot hole 3a to constitute a resolver winding 4a (shown in FIG. 2). A conducting wire is wound around the groove 3b to constitute a transformer winding 4b (shown in FIG. 2). Similarly, the stator 2 is also wound. In FIG. 1, the windings of the rotor 3 (resolver windings and transformer windings) and the windings of the stator 2 are not shown. For example, the rotor 3 of the resolver 1 is attached (fixed) to a rotating shaft (not shown) of an automobile test apparatus.

  As shown in detail in FIG. 2, the resolver winding 4a portion of the resin mold 5a is covered with the carbon fiber 6a by being wound with a string-like carbon fiber 6a impregnated with resin. ing. Further, the transformer winding 4b portion molded with the resin mold 5b is also covered with the carbon fiber 6b by being wound with a string-like carbon fiber 6b impregnated with resin. The carbon fiber is not necessarily in the form of a string, and may be in the form of a strip. The resin used for the resin mold is, for example, an epoxy resin.

  Instead of impregnating the carbon fiber with the resin, the carbon fiber may be coated (applied) with the resin. Furthermore, a band-shaped carbon fiber and a band-shaped resin may be used in an overlapping manner. Moreover, although the example in which the winding portion of the rotor is resin-molded has been shown, the winding portion of the rotor is usually not resin-molded in many cases (there is often only a winding).

  For example, a resin-molded winding part is wound with the carbon fiber while impregnating a string-like carbon fiber with a liquid epoxy resin. Thereafter, the carbon fiber impregnated with the epoxy resin is dried at 80 ° C. for 4 hours or more. Furthermore, it is dried at 120 ° C. for 2 hours. Carbon fiber or epoxy resin is prevented from protruding from the outer peripheral end (outer diameter: D) of the rotor 3. When winding a string-like carbon fiber, a tension of 3 to 5 kg is applied. In order to prevent the unevenness of the epoxy resin and to prevent the rotation imbalance of the rotor 3, the axial direction of the rotor 3 is set to the vertical direction during drying.

  Here, the carbon fiber has low elasticity and does not stretch. And it is conductive and light. Moreover, the strength of the carbon fiber reinforced with resin is high. According to the present invention, the resin-molded winding portion (the resolver winding 4a portion and the transformer winding 4b portion) of the rotor 3 is covered with a carbon fiber reinforced with resin, thereby rotating the rotor 3 at a speed of 20000 rpm or more. Even if it makes it, the intensity | strength of the coil | winding part (the resin mold in this embodiment) of the rotor 3 becomes difficult to fall. That is, even if the rotor 3 is rotated at a high speed at 20000 rpm or more, the centrifugal force breakage of the resin mold (5a, 5b) can be prevented. Moreover, since carbon fiber has electroconductivity, it is excellent also in noise shielding.

  Moreover, the winding part of the rotor 3 can be easily covered by using a string-like carbon fiber (6a, 6b) as in this embodiment, that is, the workability of carbon fiber reinforcement of the winding part. Excellent (manufacturability). Further, by making the carbon fiber into a string shape, the strength of the carbon fiber is further improved, and the resin mold (5a, 5b) of the rotor 3 can be reinforced more firmly. That is, the strength reduction of the resin mold (5a, 5b) of the rotor 3 can be further suppressed.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made as long as they are described in the claims. .

1: Resolver 2: Stator 3: Rotor 4a: Resolver winding 4b: Transformer winding 5a, 5b: Resin mold 6a, 6b: Carbon fiber (carbon fiber impregnated with resin)

Claims (2)

A resolver attached to an automobile test device,
An annular rotor,
An annular stator concentric with the rotor and disposed outside the rotor;
With
A resolver, wherein a winding portion of the rotor is covered with a carbon fiber reinforced with a resin. The resolver according to claim 1, wherein
A resolver, wherein the winding portion is wound with a string-like carbon fiber impregnated with a resin.

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