supported by the National Natural Science Foundation of China (Grant No. 51277146);the Foundation of Delta Science,Technology;the Education Development Program for Power Electronics (Grant No. DREG2011003)
By deriving the discrete-time models of a digitally controlled H-bridge inverter system modulated by bipolar sinu- soidal pulse width modulation (BSPWM) and unipolar double-frequency sinusoidal pulse width modulati...