公开(公告)号：US10778116B2

公开(公告)日：2020-09-15

申请号：US16279179

申请日：2019-02-19

申请人： National University Corporation Nagaoka University of Technology ,  FUJI ELECTRIC CO., LTD.

发明人： Junichi Itoh ,  Koroku Nishizawa ,  Akio Toba ,  Akihiro Odaka

IPC分类号： H02M7/537 ,  H02M1/14

摘要： A three-phase inverter includes three series circuits that are connected in parallel to a capacitor connected in parallel to a DC voltage source. Each of the three series circuits includes two semiconductor switching elements connected in series. A connection point between the two semiconductor switching elements is used as an AC output terminal for each phase. The three-phase inverter generates PWM pulses of three phases including a PWM pulse of one phase, whose pulse width of a positive side pulse in one switching cycle is the largest, and including PWM pulses of the other two phases such that a positional relationship between positive side pulses of the other two phases is a positional relationship in which an overlapping range on a time axis is smaller as compared with a state in which a positive side pulse of one phase encompasses a positive side pulse of the other pulse.