Linear feedback control circuit for a half-wave polyphase brushless motor
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United States of America Patent
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-
Aug 31, 1993
Grant Date -
N/A
app pub date -
Oct 1, 1992
filing date -
Oct 15, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The circuit comprises synchronisation devices operable to provide, for a motor having n phases, n square wave control signals phase displaced from one another by 360/n electrical degrees, with a frequency proportional to the speed of the rotor of the motor, and linear feedback pilot circuit devices operable to provide at their output, cyclically to each of the power transistors, which pilot the phases, a respective pilot signal variable as a function of a reference signal and the voltage on the corresponding phases of the motor.
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