INVERTER DRIVING SYSTEM WITH ULTRA-LOW SWITCHING POWER CONSUMPTION AND ULTRA-LOW OUTPUT END ELECTROMAGNETIC INTERFERENCE

摘要

The invention discloses an inverter driving system with ultra-low switching power consumption and ultra-low output end electromagnetic interference, comprising a three-phase driving system. Each phase driving system is an independent system and comprises a feedback control unit, a comparative control unit and a power switch circuit. Each feedback control unit calculates output setting current i _set(t) required for the phase by inputting a sinusoidal input signal u _sin(t), and an output end voltage feedback signal u _out(t) and an output current feedback signal i _out(t) fed back by the power switch circuit, and outputs the output setting current i _set(t) required for the phase to the comparative control unit. Each comparison control unit calculates an inductance peak current I _peak(t) required for switching of a switching state by outputting setting current i _set(t) and the structural characteristics of the power switch circuit, compares with the inductance current i _L(t) measured in real time to determine the switching state corresponding to a switching device in the power switch circuit, and outputs a switch state signal to the power switch circuit. According to the invention, low switching loss and low output end high frequency electromagnetic interference are achieved.