One kind of bypass type 220v electrical grid sway control method of

The present invention provides a power bypass anti-shake type 220V electrical device and control method, the apparatus comprising a storage unit AC to DC, the unit MCU controls the display unit and the inverter output; the energy storage unit comprises a rectifying AC to DC circuit, the storage control circuit and a fast energy storage circuit; single chip microcontroller includes a control and display unit, and the storage module circuit DC buck voltage detecting circuit; inverter output unit includes a high frequency PWM generating circuit, the output circuit a high-frequency transformer, the transformer output full bridge rectifier circuit, PWM generating circuit, PWM driven full-bridge inverter circuit, 220V power zero-crossing detection circuit, 220V power voltage detecting circuit, 220V AC power inverter switching circuit and a signal interface circuit. The present invention adopts the inverter in the bypass mode, without changing the structure of the contactor, the contactor does not affect the normal operation of the impact there is no problem to have any contact with versatility, cost and increase system reliability.