Driving circuit for DC motor

Details Driving circuit for DC motor Driving circuit for DC motor

1980-12-01

1982-12-07

Smith, Jr., David

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318434, 318376, 363 57, H02P 516

Patent

active

043629768

ABSTRACT:
Disclosed is a DC motor drive circuit adapted to prevent thyristor commutation failure when a thyristor-controlled three-phase full-wave reversible bridge undergoes a transition in operating mode from a power inversion mode to a power rectification mode. The drive circuit includes a thyristor-controlled three-phase full-wave reversible bridge whose firing phase is controlled in accordance with a speed deviation between the actual speed of a DC motor and a command speed, polarity discrimination means for discriminating the polarity of the speed deviation, firing phase narrowing means operable in the power inversion mode to narrow the thyristor firing phase down to a minimum firing phase due to a reversal in the polarity of the speed deviation, detection means for detecting an intermittence in armature current, and blocking means for blocking firing of the three-phase thyristor-controlled inverter for a prescribed period of time when the intermittence of the armature current has been detected, the operation mode of the inverter being changed over from the power inversion mode to the power rectification mode after the lapse of said prescribed time period.

REFERENCES:
patent: 3484676 (1969-12-01), Wilkerson
patent: 3832620 (1974-08-01), Pollard
patent: 3863134 (1975-01-01), Pollard
patent: 4104570 (1978-08-01), Hamby et al.
patent: 4153863 (1979-05-01), Schachte et al.

Affiliated with

Also associated with

Rating

Driving circuit for DC motor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Driving circuit for DC motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Driving circuit for DC motor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1905446