JPS60129897U

JPS60129897U - Capstan motor drive circuit

Info

Publication number: JPS60129897U
Application number: JP1984017117U
Authority: JP
Inventors: 天尾　信義; 木谷　範昭; 高橋　良久
Original assignee: 三洋電機株式会社; 熊谷精密株式会社
Priority date: 1984-02-08
Filing date: 1984-02-08
Publication date: 1985-08-31

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案実施例の回路ブロック図ミ第２図はその
回転数−トルク特性図、第３図は従来例の回路ブロック
図、第４図は従来例の回転熱−ト、ルク特性図である。主な符号の説明、Ｕ、Ｖ、Ｗ・・・電機子巻線、Ｑ　Ａ
Ｉ　Ｑａ９　Ｑ’Ｃ・・・第１群のドライブトランジス
タ、Ｑａ、　Ｑｂ、　Ｑｃ−・・第２群のドライブトラ
ンジスタ、４・・・切換スイッチ（選択手段）。Fig. 1 is a circuit block diagram of an embodiment of the present invention, Fig. 2 is a rotation speed-torque characteristic diagram, Fig. 3 is a circuit block diagram of a conventional example, and Fig. 4 is a rotational heat and torque characteristic of a conventional example. It is a diagram. Explanation of main symbols, U, V, W...armature winding, Q A
I Qa9 Q'C... Drive transistors of the first group, Qa, Qb, Qc-... Drive transistors of the second group, 4... Changeover switch (selection means).

Claims

[Scope of utility model registration request]

In a drive circuit for a capstan motor in which armature windings are Y-connected, a first path for supplying current to the armature windings via a drive transistor and a connection point between the Y-connections to the armature windings. a second path through which a current is supplied to the motor; and selection means for supplying a drive voltage from the first path to one of the second detection paths, and when the capstan motor rotates at high speed, the second path A capstan motor drive circuit, wherein the first route is selected during low speed rotation.