Circuit arrangement and method for controlling a brushless, permanently excited direct current motor
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United States of America Patent
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-
Jul 31, 2007
Grant Date -
Feb 22, 2007
app pub date -
Jan 19, 2004
filing date -
Apr 10, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a circuit arrangement for self-commuting control of a brushless, permanently excited direct current motor. Said circuit arrangement determines the commutation interval by evaluating the induction signal of a signal phase. A capacitive interference suppression component is arranged between the signal phase and an adjacent motor phase in the commutation cycle in order to suppress interferences of the induction signal. The capacitive interference suppression component is dimensioned in such a way that interfering influences of the power-switch element upon the induction signal are compensated for. This makes it possible to more accurately determine the momentary rotating position of the rotor and, hence, a differentiated control or adjustment of performance-influencing manipulated variables during operation. This has positive effects upon the efficiency, the power/weight ration and energy consumption of the motor and enables stable operation.
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