A current share method for parallel single-phase DC/AC inverter without control interconnection

A current share method for parallel single phase DC/AC inverter without control interconnection is presented. Using small ac signal transferred on the output line, this method doesn´t require current share bus among inverters and has some merits that other current share methods don´t have. The structure of the parallel system and the control block diagram of each unit are introduced, the current share method is described in detail. Some simulation results and experimental results are provided in this paper to prove the validity of the current share method.