Variable duty ratio speed controller for DC motors

Details Variable duty ratio speed controller for DC motors Variable duty ratio speed controller for DC motors

1986-02-07

1989-02-07

Dobeck, Benjamin

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318345AB, G05B 500

Patent

active

048034100

ABSTRACT:
A speed controller for a DC motor includes a semiconductor switching device connected in series with it in a DC power circuit. The switching circuit is turned on and off with a duty ratio variable as a function of motor load. A time constant circuit including a capacitor is connected in parallel with the switching device to develop a voltage which is compared with a reference variable between high and low levels in response to the exceedance of the varaible reference. The switching device is turned on when the voltage developed by the capacitor is higher than the lower reference voltage to energize the motor, and is turned off when the capacitor voltage is lower than the higher reference voltage to de-energize the motor. The on-duty period of the motor is variable as a function of a motor-load representative voltage developed in the switching device during its turn-on period and the off-duty period is variable as a function of a counter-electromotive force generated in the motor as inversely proportional to motor load.

REFERENCES:
patent: 3411062 (1968-11-01), Kamens
patent: 3710213 (1973-01-01), Hansen
patent: 3878446 (1975-04-01), Brandt
patent: 4241299 (1980-12-01), Bertone
patent: 4292574 (1981-09-01), Sipin et al.
patent: 4325011 (1982-04-01), Peterson
patent: 4494057 (1985-01-01), Hotta
patent: 4510423 (1985-04-01), Iwasawa
patent: 4511829 (1985-04-01), Wisiniewski

Affiliated with

Also associated with

Rating

Variable duty ratio speed controller for DC motors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable duty ratio speed controller for DC motors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable duty ratio speed controller for DC motors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1086518