Coasting AC motor restart system and method

Details Coasting AC motor restart system and method Coasting AC motor restart system and method

1986-06-09

1988-01-12

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318798, 318806, H02P 126

Patent

active

047193980

ABSTRACT:
A variable frequency adjustable speed motor drive allows restart of a spinning induction motor by initially increasing the frequency of the associated inverter while keeping the DC voltage source thereof low, then by decreasing the frequency of the inverter while monitoring the effective motor impedance V.sub.DC /I.sub.DC or V.sub.AC /I.sub.AC until the latter jumps at an initial level indicating matching of the frequency with the motor spinning speed. Thereafter, the DC voltage is restored in magnitude and the inverter is increased in frequency to match the desired motor speed.

REFERENCES:
patent: 4409533 (1983-10-01), Kawabata
patent: 4417193 (1983-11-01), Hirata
patent: 4451112 (1984-05-01), Hattori et al.
patent: 4607205 (1986-08-01), Kito

Affiliated with

Also associated with

Rating

Coasting AC motor restart system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Coasting AC motor restart system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coasting AC motor restart system and method will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-922353