Patent ID: 9543867
Date: 2017-01-10
CPC Classifications: H02P

Claim:
1. A driving apparatus for a brushless direct current motor having rotor coils and terminals configured to connect to the rotor coils, comprising: at least three half-bridge circuits, each half-bridge circuit including two power switching devices connected in series, each half-bridge circuit being configured to supply a voltage to one of the terminals of the brushless direct current motor; a zero crossing detection module; and a control module, wherein the zero crossing detection module is configure to (i) detect whether the rotor coils of the brushless direct current motor experience back electromotive force (BEMF) zero crossing, (ii) receive information regarding a type of the brushless direct current motor from the control module, (iii) provide the control module with an indication signal that indicates whether the rotor coils of the brushless direct current motor currently experience BEMF zero crossing based on the type of the brushless direct current motor, and the control module is configured to (i) transmit to the zero crossing detection module the information regarding the type of the brushless direct current motor, and (ii) control the power switching devices of the at least three half-bridge circuits by generating and outputting, based on the indication signal provided by the zero crossing detection module, pulse width modulation signals.