Inverter Power Control Scheme

The control situation of inverters is analyzed in this paper. Based on the analyzing above, the problem in inverter control is put forward, namely less satisfaction of good static and dynamic response simultaneously. Aim at the problem, a novel inverter control scheme of DSP-based voltage and current dual loop control with repetitive controller embedded is presented in this paper. This scheme can achieve the satisfactory static and dynamic response, and can be used in occasion of high quality voltage waveform.The scheme is realized in a vehicle intverter. Repetitive control is used to reduce voltage distortion under abrupt load variation or nonlinear loads and attain good quality of the voltage waveform; Current loop is designed to quicken the dynamic response and strengthen the ability of the inverter control. This scheme is applied to solve the problems of the previous analog scheme of voltage loop control in the inverter, namely the output voltage of the inverter failed off clearly when the inverter was fully loaded and the dynamic response of the inverter was slow in light-load state. The scheme is proved valid in the experiments.