公开(公告)号：US20230128630A1

公开(公告)日：2023-04-27

申请号：US17499735

申请日：2021-10-12

申请人： Chakridhar Reddy Teeneti ,  Regan A. Zane ,  Hongjie Wang ,  Dorai Babu Yelaverthi

发明人： Chakridhar Reddy Teeneti ,  Regan A. Zane ,  Hongjie Wang ,  Dorai Babu Yelaverthi

IPC分类号： H02M5/293 ,  H02M5/22 ,  H02M1/42 ,  H02M7/5395

摘要： An power converter includes an unfolder connected to a three-phase source and has an output connection with a positive terminal, a negative terminal and a neutral terminal. The unfolder creates two unipolar piece-wise sinusoidal DC voltage waveforms offset by a half of a period. A three-input converter connected to the unfolder produces a quasi-sinusoidal output voltage across output terminals. Switches of the converter selectively connect the positive, negative and neutral inputs across the output terminals. A PWM controller controls a first duty ratio and a second duty ratio for the converter based on a phase angle of the source and a modulation index generated from an error signal related to a control variable. The duty ratios are time varying with a fundamental frequency of the source. The modulation index relates to output voltage of the converter, peak voltage or current of the source and/or peak current at the output terminals.

公开(公告)号：US20230128970A1

公开(公告)日：2023-04-27

申请号：US17968701

申请日：2022-10-18

申请人： Chakridhar Reddy Teeneti ,  Regan A. Zane ,  Hongjie Wang ,  Dorai Babu Yelaverthi

发明人： Chakridhar Reddy Teeneti ,  Regan A. Zane ,  Hongjie Wang ,  Dorai Babu Yelaverthi

IPC分类号： H02M5/293 ,  H02M1/42 ,  H02M5/22 ,  H02M7/5395

摘要： A power converter includes an unfolder connected to a three-phase source and has an output connection with three output terminals. A three-input converter connected to the unfolder produces a quasi-sinusoidal output voltage across converter output terminals. Switches of the converter selectively connect each of the three output terminals across the converter output terminals. A pulse-width modulation controller controls a first duty ratio and a second duty ratio for the converter based on a phase angle of the source and a modulation index generated from an error signal related to a control variable. The duty ratios are time varying at a rate related to a fundamental frequency of the source. The modulation index relates to output voltage of the converter, peak voltage or current of the source and/or peak current at the output terminals.