公开(公告)号：US3701939A

公开(公告)日：1972-10-31

申请号：US3701939D

申请日：1970-12-28

Applicant: DANFOSS AS

Inventor： PETERSEN TOM KASTRUP ,  HENRIKSEN NEILS JUUL

IPC: H02M1/06 ,  H03K17/72 ,  H02M7/52

CPC classification number: H03K17/72 ,  H02M1/06

Abstract: The invention relates to a reverse voltage circuit for thyristors which has particular application to an inverter circuit. The basic circuit includes a thyristor, a first diode, and a transformer having the primary winding thereof in series relation to the diode. The first diode and the transformer primary winding are in parallel relation to the thyristor with the diode being antiparallel relative to the thyristor. The transformer secondary winding and a second diode are in series and a D.C. voltage source biases the second diode in a counter direction relative to the secondary winding. With this circuit higher reverse voltages are obtained having relatively lengthy durations to effect switching off of a thyristor in a satisfactory manner.

Abstract translation: 本发明涉及一种用于晶闸管的反向电压电路，其特别适用于逆变器电路。 基本电路包括晶闸管，第一二极管和变压器，其初级绕组与二极管串联。 第一二极管和变压器初级绕组与晶闸管并联，二极管相对于晶闸管反并联。 变压器次级绕组和第二二极管串联并且直流电压源相对于次级绕组在相对方向上偏置第二二极管。 利用该电路，获得具有相对长的持续时间以使得以令人满意的方式切断晶闸管的反向电压较高。