In view of the energy dissipation and other problems that occur when the converter is loaded,a new type of energy-saving and environmental digital energy feedback device is proposed.The device is mainly composed of a cascade of converters and Boost circuits based on H-bridge and full-bridge rectifier inverter circuits.It uses STM32 digital controller combined with sinusoidal pulse width modulation technology(SPWM)to realize sinusoidal alternating current.The circuit is analyzed and designed and the control strategy is optimized.The test results show that the designed device has stable voltage,...