Patent ID: 7250733
Filing Date: 2007-07-31
Classification: H02P,Y02P

Abstract:
1. A circuit arrangement for controlling a brushless, permanently excited direct current motor, the motor having a rotor, a stator and a plurality of phases having in each case an external phase connection, the arrangement comprising: a power control unit to which the phases, a power DC voltage source and a main control unit are connected, such that the main control unit, which is also electrically connected to the phase connections, controls the power control unit in accordance with an electrical induction signal from only one of the phases, being the signal phase, induced by the rotation of the rotor, in such a way that the phases dependent on the relative rotational position of the rotor are electrically connected in cyclic sequence, and offset in time, for one commutation interval in each case, alternating between a higher or lower voltage potential of the motor DC voltage source or are electrically separated from both voltage potentials, and such that immediately between the external phase connection of the signal phase and the external phase connection, and only between these two phase connections, a capacitive interference suppression component is arranged and acts as part of a bridge circuit comprising: