Research and implementation of the high-power three-phase sweep incentives source

This paper focuses on the high-power three-phase sweep incentives source, which mainly used digital switching power amplifier technology and combined three-phase topology. Synthesized control (repetitive control and PI control) and single polarity double frequency are used for reducing the output voltage waveform distortion. The optimal control strategies based on the characteristic of imbalance are used for improving the system dynamic response. Adaptive modulation algorithm is proposed for a wide range frequency adjustment. The implementation details based on DSP are also presented in this paper, and the experiments of the sweep incentives source working on 200-2000Hz are shown to prove that the output voltage waveform is excellent (the maximum distortion is less than 2%).