Electricity: motive power systems – Induction motor systems – Primary and secondary circuits
Patent
1979-01-11
1981-07-07
Rubinson, Gene Z.
Electricity: motive power systems
Induction motor systems
Primary and secondary circuits
318802, H02P 736
Patent
active
042777356
ABSTRACT:
An induction motor has a multi-phase primary winding (stator winding) and a multi-phase secondary winding (rotor winding) which are connected to each other in opposite phase relation. The both windings are fed with variable frequency A.C. current from a common frequency converter. A position sensor for sensing a rotor position is mounted on the induction motor. The position signal of the position sensor is in phase with an air gap flux between the primary winding and the secondary winding. Magnitude of a motor current is controlled in accordance with a torque command signal indicative of an error between a speed command signal and a speed feedback signal and with a voltage command signal for determining a terminal voltage, and a phase difference of the motor current relative to the position signal is controlled in accordance with the torque command signal and the voltage command signal. In this manner, the torque generated can be varied while maintaining amount of air gap flux and hence the terminal voltage constant.
REFERENCES:
patent: 3851234 (1974-11-01), Hoffman et al.
patent: 3911340 (1975-10-01), Plunkett
patent: 4019105 (1977-04-01), Cornell et al.
patent: 4088935 (1978-05-01), D'Atre et al.
patent: 4160940 (1979-07-01), Wolf
Kubota Yuzuru
Nagase Hiroshi
Okuyama Toshiaki
Hitachi , Ltd.
Rubinson Gene Z.
LandOfFree
Control apparatus for induction 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 Control apparatus for induction motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control apparatus for induction motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-196000