Digitally controlled pulse width modulated motor speed control f

Details Digitally controlled pulse width modulated motor speed control f Digitally controlled pulse width modulated motor speed control f

1981-03-16

1983-06-14

Truhe, J. V.

Electricity: motive power systems

Plural diverse motor controls

318601, H02P 516

Patent

active

043885705

ABSTRACT:
A digitally controlled pulse width modulated control system for a servo device is disclosed wherein the control transistors (46, 48, 50, 52) can be operated directly from the incoming voltage source. The system converts the input or feedback signal into digital form that is applied to a downward counter arrangement (16, 18) which, after a pre-set period of time, allows logic circuitry (20) to selectively apply conduction pulses to the transistors (46, 48, 50, 52). Such selective conduction allows the transistors (46, 48, 50, 52) to regulate the direction of rotation of a motor (58) and the "width" or portion of the incoming waveform applied thereto via the transistors (46, 48, 50, 52).

REFERENCES:
patent: 4201936 (1980-05-01), Roumanis
patent: 4263557 (1981-04-01), Jorvinen

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