Control system for a DC motor

Details Control system for a DC motor Control system for a DC motor

1980-02-21

1982-11-16

Truhe, J. V.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318341, H02P 516

Patent

active

043596746

ABSTRACT:
A control system for a DC motor controlling the supply of power to polyphase coils by a drive transistor has a DC-DC switching converter for changing an output voltage according to an on-time ratio of the switching semiconductor, and a voltage controller for detecting a voltage drop across the drive transistor and for controlling the on-time ratio of the switching semiconductor so that the voltage drop across the drive transistor may be a predetermined small value. Therefore, the control system for a DC motor has a high power efficiency but reduced noise in the polyphase coils because of the operation of the DC-DC switching converter and the voltage controller. Furthermore, the control system for a DC motor can precisely control the supply of power to the polyphase coils by the drive transistor.

REFERENCES:
patent: 3373344 (1968-03-01), Seer
patent: 3600658 (1971-08-01), Kuniyoshi
patent: 3896348 (1975-07-01), Loderer
patent: 4088932 (1978-05-01), Okuyama et al.

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