JPS6254598U

JPS6254598U -

Info

Publication number: JPS6254598U
Application number: JP1985144365U
Authority: JP
Priority date: 1985-09-20
Filing date: 1985-09-20
Publication date: 1987-04-04

Description

[Brief explanation of the drawing]

第１図ないし第３図はこの考案のモータ駆動装
置の１実施例を示し、第１図は結線図、第２図ａ
〜ｆは第１図の運転時の動作説明用のタイミング
チヤート、第３図は第１図の運転時の通電電流の
波形図、第４図、第５図はそれぞれブラシを有す
る直流モータの始動電流抑制回路の結線図である
。５……直流電源、６……直流ブラシレスモータ
、８……駆動部、９……主制御部、１４……補助
制御部、Ｑ１〜Ｑ６……トランジスタ、Ｒ１０…
…電流検出抵抗。 Figures 1 to 3 show one embodiment of the motor drive device of this invention, Figure 1 is a wiring diagram, Figure 2 is a
~f is a timing chart for explaining the operation during operation in Fig. 1, Fig. 3 is a waveform diagram of the current applied during operation in Fig. 1, and Figs. 4 and 5 are respectively for starting a DC motor with brushes. It is a wiring diagram of a current suppression circuit. 5... DC power supply, 6... DC brushless motor, 8... Drive section, 9... Main control section, 14... Auxiliary control section, Q1 to Q6... Transistor, R10...
...Current detection resistor.

Claims

[Scope of utility model registration request]

A motor drive device for driving a DC brushless motor includes a bridge circuit of a plurality of semiconductor switching elements provided between a DC power source and the motor, and supplies a drive current to the motor by switching each of the switching elements. a main control section that outputs a switching control signal for each of the switching elements based on a rotor position detection signal of the motor; a current detection section that outputs a detection signal with a detection level proportional to the drive current; The detection level of the detection signal is compared with a reference level set to a detection level of a current slightly larger than the rated current, and the switching control signal of the drive control section is controlled while the detection level of the detection signal exceeds the reference level. and an auxiliary control section that intermittently stops power supply to the motor by intermittently cutting off the power supply.