JPH03101191U

JPH03101191U -

Info

Publication number: JPH03101191U
Application number: JP838990U
Authority: JP
Priority date: 1990-01-31
Filing date: 1990-01-31
Publication date: 1991-10-22

Description

[Brief explanation of drawings]

第１図はこの考案の１つの実施例に係るモータ
制御回路の回路図、第２図は従来のモータ制御回
路の回路図である。主な符号の説明、１０……Ｈブリツジ回路、２
０Ａ……ベースドライブ回路、２２……ベースド
ライブコントロール回路、Ｍ……ＤＣモータ、Ｑ
１……第１ＰＮＰトランジスタ、Ｑ２……第１Ｎ
ＰＮトランジスタ、Ｑ３……第２ＰＮＰトランジ
スタ、Ｑ４……第２ＮＰＮトランジスタ、Ｑ５′
……第３ＰＮＰトランジスタ、Ｑ６′……第４Ｐ
ＮＰトランジスタ。 FIG. 1 is a circuit diagram of a motor control circuit according to one embodiment of this invention, and FIG. 2 is a circuit diagram of a conventional motor control circuit. Explanation of main symbols, 10...H bridge circuit, 2
0A...Base drive circuit, 22...Base drive control circuit, M...DC motor, Q
1...first PNP transistor, Q2...first N
PN transistor, Q3...second PNP transistor, Q4...second NPN transistor, Q5'
...3rd PNP transistor, Q6'...4th P
NP transistor.

Claims

[Claims for Utility Model Registration] A first PNP transistor connected between the positive terminal of the DC motor and the + power supply and GND;
NPN transistor and a second PN connected between the negative terminal of the DC motor and the + power supply and GND
According to an H bridge circuit consisting of a P transistor and a second NPN transistor, and a forward/reverse control signal input from the outside, when the forward/reverse control signal is at the forward rotation level, the first PN of the H bridge circuit
A base current is passed through the P transistor and the second NPN transistor to turn them on, and when the forward/reverse control signal is at the reverse level, the second PNP transistor of the H bridge circuit is turned on.
a base drive circuit that causes a base current to flow through the transistor and the first NPN transistor to turn them on;
A motor control circuit comprising: a base drive circuit; a third PNP transistor for base drive and a current limiting resistor connected in series between the base of the first PNP transistor and the base of the second NPN transistor of the H-bridge circuit; A fourth PNP transistor for base drive and a current limiting resistor are connected in series between the base of the second PNP transistor and the base of the first NPN transistor, and the forward/reverse control signal is set to the normal rotation level according to the externally inputted normal/reverse control signal. A motor control circuit comprising: a base drive control circuit that turns on a third PNP transistor when , and turns on a fourth PNP transistor when a forward/reverse control signal is at a reverse level;