A three-phase signal source generator based on single-chip microprocessor is presented in this paper…The function , technical specification , hardware and software are explained in detail.

A systematic description of the state switching in trilogic PWM signal generation of three-phase CSR by using the conversion between bilogic and trilogic switching functions.

The difference of output voltage of inverter and 220v is set as control signal, controller change the PWM signal to regulate buck-boost converter and three-phase rectifier.