JPH0161895U

JPH0161895U -

Info

Publication number: JPH0161895U
Application number: JP15472287U
Authority: JP
Priority date: 1987-10-12
Filing date: 1987-10-12
Publication date: 1989-04-20

Description

[Brief explanation of the drawing]

第１図は本考案に係るドライバ回路の一実施例
を示すモータ駆動回路図、第２図はこのモータ駆
動回路の動作を説明するタイミングチヤート、第
３図はこのモータ駆動回路に使用するトランジス
タに付設する放熱板の正面断面図、第４図はこの
放熱板の長さ寸法Ｌを決定するためのグラフ、第
５図は有接点スイツチのみにより構成した従来の
モータ駆動回路を示す図、第６図はトランジスタ
のみにより構成した従来のモータ駆動回路を示す
図である。１……モータ、２……電源、３……放熱板、Ｓ
_１１〜Ｓ_２２……有接点スイツチ、Ｔｒ_１１，Ｔ
ｒ_２２……トランジスタ。 Fig. 1 is a motor drive circuit diagram showing one embodiment of the driver circuit according to the present invention, Fig. 2 is a timing chart explaining the operation of this motor drive circuit, and Fig. 3 is a diagram showing the transistors used in this motor drive circuit. 4 is a graph for determining the length L of this heat sink; FIG. 5 is a diagram showing a conventional motor drive circuit configured only with a contact switch; FIG. The figure shows a conventional motor drive circuit composed only of transistors. 1... Motor, 2... Power supply, 3... Heat sink, S
₁₁ to _S22 ...Contact switch, _Tr11 ,T
_r22 ...Transistor.

Claims

[Scope of utility model registration request]

A first series circuit in which a first contact switching means and a first non-contact switching means are connected in series, and a second contact switching means and a second non-contact switching means are connected in series. a second series circuit formed by a second series circuit, a connection point between the first contact switching means and the first non-contact switching means, and a connection between the second contact switching means and the second non-contact switching means; The current connected between the contact point and the point and supplied via the first contact switching means and the second non-contact switching means is used as the drive current in the positive direction, and the second
and a load circuit that uses current supplied via the contact switching means and the first non-contact switching means as a drive current in the opposite direction,
By closing and opening the non-contact switching means, the supply current to the load circuit is directly turned on and off, and the first contact point is closed before closing the second non-contact switching means. The switching means is closed, and the first contact switching means is opened after the second non-contact switching means is opened, and the first contactless switching means is opened.
The second contactless switching means is closed before the contactless switching means is closed, and the second contactless switching means is opened after the first contactless switching means is opened. A driver circuit featuring: