公开(公告)号：US3774101A

公开(公告)日：1973-11-20

申请号：US3774101D

申请日：1972-06-22

Applicant: ASEA AB

Inventor： HELGESSON K

IPC: G01R31/26 ,  H02M7/00

CPC classification number: H02M7/00 ,  G01R31/263

Abstract: For calculating and indicating the commutation time for a pair of commutating rectifiers in a static converter, the load current value of the converter at the start of the commutation is stored in an integrating memory circuit. The commutation voltage is connected to the input of the memory circuit at the start of the commutation. The integrated value of the commutation voltage is continuously subtracted during the commutation from the stored current value. The difference between the current values is continuously supervised, and a signal indicating the end of the commutation is emitted when such difference is indicated to have a predetermined value, which may be zero or the current value in question.

Abstract translation: 为了计算并指示静态转换器中的一对整流整流器的换向时间，转换开始时的转换器的负载电流值被存储在积分存储器电路中。 换向电压在换向开始时连接到存储电路的输入端。 在从存储的电流值进行换向期间，连续减去换向电压的积分值。 连续监视当前值之间的差异，并且当这种差被指示为具有可以为零或所讨论的当前值的预定值时，发出指示换向结束的信号。