Method and device for controlling a brushless alternating curren

Details Method and device for controlling a brushless alternating curren Method and device for controlling a brushless alternating curren

1983-03-09

1985-10-29

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318798, 318806, H02P 540

Patent

active

045502820

ABSTRACT:
A method and a device for controlling a brushless alternating current motor (23) driven by an inverter (31-36) connected to a direct current supply (24,25). The direct current supplied to the inverter is sensed. The signal is passed through a peak detector (41) to a regulator (45), which decreases its frequency controlling output signal if the peak value input signal exceeds a predetermined value. A control signal corresponding to the torque demand of the motor is also produced. This signal controls the voltage supplied to the motor. Negative pulses at the turning off of the inverter switches are also sensed and used for controlling the degree of magnetization of the motor.

REFERENCES:
patent: 3387205 (1968-06-01), Tesdall
patent: 3500158 (1970-03-01), Landau et al.
patent: 3662247 (1972-05-01), Schieman
patent: 3978383 (1976-08-01), Carthy
patent: 4028599 (1977-07-01), Zankl et al.
patent: 4371824 (1983-02-01), Gritter
patent: 4420718 (1983-12-01), Saki et al.

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