ELECTRONIC COMMUTATOR OF BRUSHLESS DC MOTOR

摘要

The blocking protection arrangement includes a first transistor whose emitter-collector path lies in the base voltage supply of second and third switching transistors performing commutation. The first transistor receives its base voltage from a self-induction voltage of a stator winding. In the event of a blocking of a motor, this voltage is missing, so that the first transistor is rendered nonconductive.