Patent ID: 9130498
Filing Date: 2015-09-08
Classification: H02P

Abstract:
1. A single-phase DC motor control circuit, comprising: a logic circuit, connected to a phase-changing signal, for detecting voltage level of the phase-changing signal and outputting a first logic signal, a second logic signal, a third logic signal and a fourth logic signal, wherein phase of the first logic signal is opposite to that of the second logic signal; a switching circuit, connected to the logic circuit, for receiving a pulse width modulation signal, the first logic signal, the second logic signal, wherein the switching circuit generates a first direction driving signal according to the pulse width modulation signal and the first logic signal, and generates a second direction driving signal according to the pulse width modulation signal and the second logic signal; and a driving circuit, connected to the logic circuit and the switching circuit, for receiving the first direction driving signal and the fourth logic signal and accordingly transmitting a first output signal to a single-phase DC motor, and the driving circuit receiving the second direction driving signal and the third logic signal and accordingly transmitting a second output signal to the single-phase DC motor; wherein the first output signal and the second output signal are sinusoidal signal with positive half-wave, and phase difference between the first output signal and the second output signal is 180 degrees.