Method of controlling the starting, stopping and speed of an AC

Details Method of controlling the starting, stopping and speed of an AC Method of controlling the starting, stopping and speed of an AC

1999-03-11

2000-12-19

Martin, David S.

Electricity: motive power systems

Induction motor systems

Primary circuit control

318798, 318801, 318803, H02P 736

Patent

active

061631299

ABSTRACT:
A method for controlling the starting, stopping and operation of an AC motor is provided. Each winding of the AC motor is interconnected to an AC source by a thyristor switch and a bypass contactor for providing voltage and current to the AC motor. The method includes a steps of sequently firing a pair of tyristor switches to bring the AC motor to full operating speed. Once at operating speed, the bypass contactors are closed. Upon detection of a voltage drop across a thyristor switch, the thyristor switch is fired immediately to transfer motor current from the bypass contactor to the thyristor switch in order to maintain voltage and current to the AC motor.

REFERENCES:
patent: 3991354 (1976-11-01), Rosa et al.
patent: 4712054 (1987-12-01), Boldt
patent: 4796142 (1989-01-01), Libert
patent: 5225992 (1993-07-01), Kobari et al.
patent: 5305234 (1994-04-01), Markus et al.

Affiliated with

Also associated with

Rating

Method of controlling the starting, stopping and speed of an AC does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of controlling the starting, stopping and speed of an AC , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of controlling the starting, stopping and speed of an AC will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-273547