Variable speed AC induction motor controller

Details Variable speed AC induction motor controller Variable speed AC induction motor controller

1995-10-24

1998-06-16

Masih, Karen

Electricity: motive power systems

Induction motor systems

Primary circuit control

318254, 318138, 318439, 318767, 318747, 318770, 363136, 363132, 363 58, H02P 528

Patent

active

057676534

ABSTRACT:
A circuit for powering a two-phase AC induction motor. The circuit generates a first signal of the form Vdc+A sin(2.pi.ft-0.degree.) and a second signal of the form Vdc+A sin(2.pi.ft-90.degree.). The first signal is input to a first error amplifier along with a first sampled difference signal from the motor. The second signal is input to a second error amplifier along with a second sampled difference signal from the motor. The outputs from each of the first and second amplifiers is input into a first comparator and a second comparator along with a sawtooth waveform to create a first sinusoidally modulated square wave signal and a second sinusoidally modulated square wave signal. The first and second sinusoidally modulated square wave signals are fed to driver circuits which in turn control an H-bridge circuit for powering the motor from a DC bus.

REFERENCES:
patent: 3649845 (1972-03-01), Foch
patent: 3715920 (1973-02-01), Groberman et al.
patent: 3757183 (1973-09-01), Nola
patent: 4008421 (1977-02-01), Bird
patent: 4101821 (1978-07-01), Kirby
patent: 4223261 (1980-09-01), White
patent: 4482961 (1984-11-01), Kilner et al.
patent: 4618787 (1986-10-01), Jacksier et al.
patent: 4680526 (1987-07-01), Okuyama et al.
patent: 4806880 (1989-02-01), Laws
patent: 4825132 (1989-04-01), Gritter
patent: 4841251 (1989-06-01), Hartmann et al.
patent: 4866397 (1989-09-01), Kimyacioglu
patent: 4928043 (1990-05-01), Plunkett
patent: 4949364 (1990-08-01), Yukawa
patent: 4962339 (1990-10-01), Schauder
patent: 4962344 (1990-10-01), Bohrer
patent: 5032771 (1991-07-01), Kerkman et al.
patent: 5066899 (1991-11-01), Nashiki
patent: 5111085 (1992-05-01), Stewart
patent: 5111150 (1992-05-01), Casey
patent: 5132599 (1992-07-01), Kono et al.
patent: 5172036 (1992-12-01), Cameron
patent: 5206543 (1993-04-01), Takita et al.
patent: 5218283 (1993-06-01), Wills et al.
patent: 5231339 (1993-07-01), Kishimoto et al.
patent: 5247237 (1993-09-01), Koyama et al.
patent: 5252905 (1993-10-01), Wills et al.
patent: 5278486 (1994-01-01), Kim
patent: 5304911 (1994-04-01), Anderson
patent: 5334923 (1994-08-01), Lorenz et al.
patent: 5345160 (1994-09-01), Corniere
patent: 5376866 (1994-12-01), Erdman
patent: 5410188 (1995-04-01), Segaram
patent: 5428285 (1995-06-01), Koyama et al.
patent: 5451832 (1995-09-01), Cameron et al.
patent: 5689167 (1997-11-01), Vitunic
Gottlieb, I. M., Electric Motors & Control Techniques, 2nd Ed., pp. 147-149, 235-247, TAB Books, 1994.

Affiliated with

Also associated with

Rating

Variable speed AC induction motor controller 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 speed AC induction motor controller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable speed AC induction motor controller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1729751