| CPC H02P 7/29 (2013.01) [H03K 4/08 (2013.01)] | 44 Claims |
|
1. A motor controller comprising:
a switch circuit, coupled to a motor for driving the motor;
a control unit, configured to generate a plurality of control signals to control the switch circuit;
a duty cycle processing unit, wherein the duty cycle processing unit receives a first pulse width modulation signal, the first pulse width modulation signal has a first duty cycle, and the duty cycle processing unit is configured to judge if the first duty cycle is equal to 0% or 100%
a pulse width modulation processing unit, wherein the duty cycle processing unit generates a first signal to the pulse width modulation processing unit, and the first signal has the first duty cycle; and
a soft switching processing unit, configured to generate a second signal to the pulse width modulation processing unit, wherein the second signal has a second duty cycle, the pulse width modulation processing unit comprises a multiplication operation unit, a comparing unit and a triangular wave generating unit, the multiplication operation unit generates a third signal based on the first signal and the second signal, the third signal has a modulated duty cycle, the triangular wave generating unit generates a fourth signal to the comparing unit, and the comparing unit receives the third signal and the fourth signal, so as to compare the third signal with the fourth signal for generating a second pulse width modulation signal to the control unit.
|