A study of parallel operation control technique of DC/AC SPWM inverter

Parallel techniques are an important skill to accomplish high power supply systems and are one of the trends of the development of the power supply techniques in the future. Synchronous control is a special topic in the parallel techniques of AC power supplies. This paper describes the design of several kinds of useful phase lock circuits which are used in SPWM inverters. With the circuits designed, parallel synchronous control of two inverters is accomplished and excellent results are gained.