Dual-motor alternating current servo driver with UPS (Uninterrupted Power Supply) power-off information protection

The invention discloses a dual-motor alternating current servo driver with UPS (Uninterrupted Power Supply) power-off information protection. According to the dual-motor alternating current servo driver, two alternating current servo motors are controlled by one driver, and motor control information can be synchronously stored under a UPS power supply mode; meanwhile, two motors share some function circuit units such as a rectifier circuit unit, a brake loop circuit unit and an inner switch power circuit unit, or some protection circuits such as an overvoltage protection circuit unit, an under-voltage protection circuit unit, a temperature protection circuit unit and an open-phase protection circuit unit, so that control cost is greatly reduced. According to a dual-motor alternating current servo system, the two alternating current servo motors are controlled by one servo driver, and the two motors can be independently operated and controlled without mutual interference.