Patent ID: 6362583
Filing Date: 2002-03-26
Classification: H02P

Abstract:
A control unit (1) for a brushless motor (5), comprisingposition detection means (10) for generating a signal (S1) indicative of the position of the motor (5), supply means (20a, 20b, 20c) for energizing two or more coils (5a, 5b, 5c) of the motor (5) in response to said signal (S1), output terminals (30a, 30b, 30c) for electrically coupling the coils (5a-c) to the supply means (20a-c), characterized in that the position detection means (10) include polarity detection means for generating a polarity signal (S1) which is a measure of the direction of a current (Ia) through at least one of the coils (5a).