公开(公告)号：EP0124719B1

公开(公告)日：1987-08-12

申请号：EP84102580.2

申请日：1984-03-09

申请人： Kabushiki Kaisha Meidensha

发明人： Matsuse, Kohki

IPC分类号： H02M5/45

CPC分类号： H02M5/4505 ,  H02M7/515 ,  H02M7/5152 ,  H02M7/757

公开(公告)号：EP0124719A1

公开(公告)日：1984-11-14

申请号：EP84102580.2

申请日：1984-03-09

申请人： Kabushiki Kaisha Meidensha

发明人： Matsuse, Kohki

IPC分类号： H02M5/45

CPC分类号： H02M5/4505 ,  H02M7/515 ,  H02M7/5152 ,  H02M7/757

摘要： In a current type GTO inverter, commutation surge voltage is inevitably generated from an inductive load whenever each GTO is turned off. The commutation surge voltage thus generated is once stored in a capacitor (C,) through a diode surge voltage rectifier (5) and then restored or regenerated to the DC sourceterminals (3A, 3B) of the GTO bridge-connected inverter (3) through a pair of other GOTs (G 7 , G.) turned on only when the capacitor voltage exceeds a predetermined value beyond the DC source voltage. After energy restoration, magnetic energy stored in a reactor (Lr,, Lr 2 ) is recharged in the same capacitor (C 1 ). The necessary elements are a capacitor (C 1 ), two GTOs (G 7 , G 8 ), two diodes (D 8 , D 9 ) and a DC reactor (7), thus simplifying the circuit configuration and reducing the cost. Additionally, since no vibration circuits to turn off thyristors for restoring the energy charged in the capacitor (C 1 ) to the GTO bridge-connected (3) inverter are required, the circuit operation is stable at higher frequency range, in particular.