公开(公告)号：EP3396841A1

公开(公告)日：2018-10-31

申请号：EP18162670.6

申请日：2012-03-13

申请人： Daihen Corporation

发明人： HATTORI, Nobuyuki ,  OHORI, Akihiro ,  MUNECHIKA, Hiroki

IPC分类号： H02M7/5387 ,  H02M7/487 ,  H02M7/5395 ,  H02M1/00

CPC分类号： H02M7/44 ,  H02M1/12 ,  H02M7/487 ,  H02M7/5387 ,  H02M7/5395 ,  H02M2001/0025 ,  H02M2001/0054 ,  H02M2007/53876 ,  Y02B70/1491

摘要： A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu1, Xv1, and Xw1 from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu1, Xv1, and Xw1. The command value signals Xu1, Xv1, and Xw1 are continuously at "0" for a predetermined period, and are continuously at "2" for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are highl.