With the continuous development of power electronics technology, inverter technology and computer control technology, portable integrated generators combining small gasoline generators and inverter power supplies have become a new development trend. Such generators have the characteristics of small size, stable voltage, small distortion, etc., and are often used in various emergency situations such as aviation equipment, medical equipment, communication equipment, military equipment, and the like.

As the core of inverter power supply, inverter technology is mainly classified as follows: (1) According to the frequency of inverter output AC, it can be divided into power frequency inverter, medium frequency inverter and high frequency inverter; (2) The number of phases output by the inverter can be divided into single-phase inverter, three-phase inverter and multi-phase inverter; (3) according to the direction of the output energy of the inverter, it can be divided into active inverter and passive inverter. (4) According to the form of the inverter main circuit, it can be divided into single-ended, push-pull, half-bridge and full-bridge inverters; (5) according to the type of inverter switching devices, can be divided into thyristor inverters , transistor inverter, FET, IGBT inverter, etc.; (6) according to the output stable parameters, can be divided into voltage-type inverter and current-type inverter; (7) according to the output voltage or current waveform, can be divided Inverting and non-sinusoidal output inversion for sine wave output; (8) According to the control mode, it can be divided into frequency modulation (PFM) inverter and pulse width modulation (PWM) inverter; (9) according to inverter switching circuit The working mode can be divided into resonant inverter, fixed frequency hard-off inverter and fixed-frequency soft-switching inverter. Based on the consideration of the volume of the inverter power system and the cost of industrial control, the design adopts the conversion mode of uncontrollable rectification plus single-phase inverter, and adopts single-chip microcomputer as the control chip to introduce the composite control of digital PID and repetitive control. The strategy effectively improves the dynamic and steady-state characteristics of the system, with small disturbances and strong anti-interference.