Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1990-04-02
1996-12-24
Wysocki, Jonathan
Electricity: motive power systems
Induction motor systems
Primary circuit control
318439, 318808, H02P 700
Patent
active
055876412
ABSTRACT:
The problem of maintaining precision control of a synchronous motor is solved in a motor start control which utilizes an estimate of the amplitude of the fundamental wave component as a feedback value. The motor receives power from a main inverter and an excitation inverter. The inverters are controlled by a control unit which includes a pulse width modulation generator which is responsive to a voltage command and a commutation command to develop switching signals for controlling the switches in the main inverter. At speeds above a preselected minimum speed, the voltage command is developed in a closed loop manner responsive to a feedback signal representing an estimate of the fundamental output of the main inverter.
REFERENCES:
patent: 3787724 (1974-01-01), Pedersen et al.
patent: 4330741 (1982-05-01), Nagase et al.
patent: 4460861 (1984-07-01), Rosa
patent: 4480299 (1984-10-01), Muto et al.
patent: 4523267 (1985-06-01), Mehl
patent: 4524310 (1985-06-01), Nagase et al.
patent: 4546293 (1985-10-01), Peterson et al.
patent: 4608527 (1986-08-01), Glennon et al.
patent: 4633382 (1986-12-01), Upadhyay et al.
patent: 4651419 (1977-09-01), Takahashi
patent: 4713596 (1987-12-01), Bose
patent: 4751438 (1988-06-01), Markunas
patent: 4757434 (1988-07-01), Kawabata et al.
patent: 4792742 (1988-12-01), Fujimoto et al.
patent: 4818890 (1989-04-01), Mose et al.
Le-Huy et al, "A Self-Controlled Synchronous Motor Drive Using Terminal Voltage Sensing" Conference-IAS Annual Meeting 1980, Cincinnati, OH, USA, 28 Sep.-3 Oct., 1980.
Sundstrand Corporation
Wysocki Jonathan
LandOfFree
VSCF start system with precise voltage control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with VSCF start system with precise voltage control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and VSCF start system with precise voltage control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1180741