Patent ID: 8987936
Filing Date: 2015-03-24
Classification: H02P

Abstract:
1. An apparatus for peak shifting adjustment, the apparatus comprising: a controlling unit, configured, after receiving Pulse-Width Modulation (PWM) signals, to sequentially control different outputting units to output the PWM signals according to a preset time sequence, wherein an interval between two adjacent outputted PWM signals is T at least two outputting units each connected to an electric device, each outputting unit configured to output a respective PWM signal to a corresponding electric device according to the control of the controlling unit, wherein each outputting unit is further configured to shift waveforms of the PWM signals by ½ period according to control of the controlling unit, wherein the preset time sequence of the controlling unit is configured to control the as least two different outputting units every time to output the PWM signals and control one of the two outputting units to use a waveform shifting function; and a duty cycle detecting module, configured to detect the duty cycle of the PWM signals, and to select a corresponding preset time sequence according to a value of the duty cycle when the duty cycle increases.