Method and device for controlling a brushless alternating current motor
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United States of America Patent
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-
Oct 29, 1985
Grant Date -
N/A
app pub date -
Mar 9, 1983
filing date -
Mar 9, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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