DUAL UNIPOLAR AND BIPOLAR DOUBLE OR TRIPLE BRUSHLESS DC MOTOR INVERTER TOPOLOGY

摘要

The present invention relates to a control circuit capable of simultaneously driving a plurality of brushless dc motors. The present invention more particularly relates to a converter circuit for driving a first brushless DC electric motor and a second brushless DC electric motor of an electrical household appliance, the converter circuit comprising a first motor driver block (1) controlling energy flow to the first brushless DC electric motor by means of first motor switching devices (9), each one energizing a respective first motor phase winding (3) in timed sequence and a second motor driver block (2) controlling energy flow to the second brushless DC electric motor by means of second motor switching devices (10), each one energizing a respective second motor phase winding (4) in timed sequence, the converter circuit having positive and negative supply rails across which a DC bus capacitor (11) is disposed thereinbetween.