CN1129342A

CN1129342A - Cylindrical-type rotary transformer

Info

Publication number: CN1129342A
Application number: CN95117581A
Authority: CN
Inventors: 曹富铉
Original assignee: Daewoo Electronics Co Ltd
Current assignee: WiniaDaewoo Co Ltd
Priority date: 1995-02-15
Filing date: 1995-12-06
Publication date: 1996-08-21
Also published as: KR200153822Y1; JPH08250350A; KR960029673U

Abstract

The invention relates to a cylindrical-type rotary transformer comprising a rotor transformer and a stator transformer that is provided with rotor coils having an inside face , a plurality of first annular grooves and a plurality of first windings , and stator coils having an outside face , a plurality of second annular groovesand a plurality of second windings .

Description

Cylindrical-type rotary transformer

The present invention relates to a kind of resolver, more particularly, relate to the cylindrical-type rotary transformer in a kind of a plurality of grooves that can easily winding be inserted on the rotor transformer.

Usually, resolver is used for transmitting signal between rotor and stator, for example is used at the rotary head drum of the head drum that is loaded on video cassette recorder (" VCR ") and fixedly transmits the signal of telecommunication between the magnetic drum.

Resolver generally is categorized as flat and column type.

Figure 1 shows that a kind of flat resolver 1 commonly used, comprise a rotor transformer 2 and a stator transformer 3, be installed in respectively on a rotary body (not shown) and the fixed body (not shown).Rotor transformer 2 that is provided and stator transformer 3 are respectively equipped with a plurality of first and

second cannelures

4 and 5, and wherein pack into a plurality of first and

second windings

6 and 7 form multiplex (MUX).

A gap n is arranged between rotor transformer 2 and stator transformer 3.The signal of telecommunication transmits between rotary body and fixed body by gap h, and promptly the signal of telecommunication in the winding 6 and one of 7 is inducing the corresponding signal of telecommunication in corresponding winding.

In a kind of like this resolver 1, do not cause noise when transmitting signal, gap h must remain constant, and this is suitable difficulty.

In order to overcome the defective of above-mentioned flat resolver, and adopted a kind of cylindrical-type rotary transformer.

Fig. 2 illustrates a kind of cylindrical-type rotary transformer commonly used 10.

Cylindrical-type rotary transformer 10 comprises a rotor transformer 11 and a stator transformer 12.The rotor transformer 11 that is provided, its inner surface are provided with a plurality of first cannelures 13, wherein insert a plurality of first windings 15, and stator transformer 12, its outer surface is provided with a plurality of second cannelures 14, wherein inserts a plurality of second windings 16.

Each first winding 15 is earlier by in the groove of location model (not shown), location model has the identical external diameter of bottom surface diameter with first groove 13 of rotor transformer 11, groove on the location model forms on the outer surface of location model, and its degree of depth is identical with the degree of depth of first groove 13; Described each first winding 15 is inserted in the corresponding groove of a plurality of first grooves 13.

But a kind of like this cylindrical-type rotary transformer 10 processes or forms a plurality of first cannelures 13 on the inner surface of resolver 11, and each first winding 15 is inserted in corresponding first cannelure 13, be difficult, cause production efficiency low, the processing cost height.

Therefore, main purpose of the present invention provides the cylindrical-type rotary transformer in a kind of a plurality of grooves that can easily winding be inserted on the rotor transformer.

According to the present invention, a kind of cylindrical-type rotary transformer is provided, it comprises a rotor transformer and a stator transformer, be respectively equipped with inner surface and outer surface, a plurality of first and second cannelures and a plurality of first and second windings, it is characterized in that: inner surface and outer surface are tapered along its central shaft, face one another, and keep a desirable gap each other; On inner surface and outer surface, being axially arranged with a plurality of first and second annular shape grooves, form a triangle basically respectively from section; And first and second windings are separately fixed in first and second grooves.

Above-mentioned and other purpose and feature of the present invention from following described preferred embodiment and together with accompanying drawing, can obviously be found out.Wherein:

Fig. 1 represents the profile of the flat resolver used always;

Fig. 2 represents the profile of the cylindrical-type rotary transformer used always; And

Fig. 3 describes the profile according to cylindrical-type rotary transformer of the present invention.

Fig. 3 provides the profile according to cylindrical-type rotary transformer 20 of the present invention.Cylindrical-type rotary transformer 20 comprises a rotor transformer 21 and a stator transformer 22.

Rotor transformer 21 and stator transformer 22 are respectively equipped with inner surface and outer surface 21a and 22a, a plurality of first and

second cannelures

23 and 24, and a plurality of first and

second windings

25 and 26.

Inner surface 21a and outer surface 22a are upwards tapered along central shaft c, face one another, and keep the gap h of a hope each other.

On inner surface and outer surface 21a and 22a, be provided with first and

second cannelures

23 and 24 respectively vertically, form a triangle basically from section.

A plurality of first windings 25, before inserting first groove 23, in a plurality of groove (not shown)s on the location model (not shown), location model it axially on have the conical outer surface identical with the inner surface 21a of rotor transformer 21, groove on the location model just forms at this outer surface, each first groove 23 on each groove respective rotor transformer 21.Then, each first winding 25 for example is inserted into and uses adhesive in corresponding first groove 23.

On the other hand, each second winding 26 can be directly on the stator transformer 22 in corresponding second groove 24.

Cylindrical-type rotary transformer 21 of the present invention is easy to make each first winding 25 to insert in corresponding first cannelure 23.In addition, rotor transformer 21 uses simple casting method to be easy to obtain, and need be at its inner surface 21a machining first cannelure 23.

Cylindrical-type rotary transformer 20 of the present invention, can adopt a kind of like this method to be assembled in the head drum of video cassette recorder (VCR), promptly respectively on the rotor transformer and stator transformer 21, the 22 going barrel (not shown) that is installed to head drum and fixing drum (not shown) with it.

Although the present invention delivers, and its preferred concrete device is described, those skilled in the art are understood that under the situation by definite scope and spirit of the present invention of following claim, can make various changes and modification.

Claims

1, a kind of cylindrical-type rotary transformer comprises a rotor transformer and a stator transformer, is respectively equipped with a plurality of first and second cannelures, and a plurality of first and second windings, it is characterized in that:

Inner surface and outer surface are tapered along its central shaft, face one another, and keep a desirable gap each other;

First and second cannelures are located at respectively on inner surface and the outer surface vertically, from section, form a triangle basically; And

First and second windings are separately fixed in first and second cannelures.

2, a kind of head drum device that is used for video cassette recorder comprises the described cylindrical-type rotary transformer of claim 1.