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1. 发明授权

US5585758A Current source gate drive circuit for simultaneous firing of thyristors 失效
标题翻译：晶闸管同时点火的电流源极驱动电路
公开(公告)号：US5585758A
公开(公告)日：1996-12-17
申请号：US267860
申请日：1994-06-29
申请人： Frank J. Prines , Ray S. Kemerer , Martin I. Norman
发明人： Frank J. Prines , Ray S. Kemerer , Martin I. Norman
IPC分类号： H03K17/0412 , H03K17/10 , H03K17/723 , H03K3/86 , H01F27/00
CPC分类号： H03K17/0412 , H03K17/105 , H03K17/723
摘要： A current source gate drive circuit for simultaneous firing of a set of series or parallel thyristors is described. The circuit includes two current loops, each of which serves as a current transformer primary. Electrically insulating tubes enclose the current loops. Current transformer cores, around which are wound a certain number of secondary turns, surround the current loops, thus magnetically coupling the primary current of the current transformer to the secondary turns. Thyristor gate driver circuits are electrically coupled to the current transformer cores. Each of the thyristor gate driver circuits receives and rectifies ac current signals from the current loops and forms a current pulse train firing signal. Each thyristor gate driver circuit has a corresponding thyristor that is fired by the current pulse train firing signal. The thyristors operate at a high voltage, but are electrically isolated from the current loops by the insulating tubes. A current pulse shaping circuit is connected to the current loops and uses dual resonant LC circuits to generate ac current signals. The current pulse shaping circuit operates in a low voltage region and is electrically isolated from the high voltage region by the insulating tubes. The current pulse shaping circuit is activated by an edge-triggered signal. To prevent misfiring of the thyristors, thyristor firing command logic is used to generate a level-trigger signal. Level-triggered logic is responsive to the level-trigger signal, but not noise or transients, and produces a pulse train enable signal that allows the thyristors to be fired.
摘要翻译：描述了用于同时点燃一组串联或并联晶闸管的电流源极栅极驱动电路。该电路包括两个电流回路，每个电流回路用作电流互感器初级。电绝缘管围绕电流回路。卷绕有一定数量次级匝的电流互感器芯围绕电流环，从而将电流互感器的初级电流磁耦合到次级匝。晶闸管栅极驱动器电路电耦合到电流互感器芯。每个晶闸管栅极驱动电路接收并整流来自电流环路的交流电流信号并形成电流脉冲串点火信号。每个晶闸管栅极驱动器电路具有由当前脉冲串触发信号触发的相应晶闸管。晶闸管工作在高电压，但是通过绝缘管与电流回路电隔离。电流脉冲整形电路连接到电流回路，并使用双谐振LC电路产生交流电流信号。电流脉冲整形电路在低压区工作，并通过绝缘管与高压区电隔离。当前脉冲整形电路由边沿触发信号激活。为了防止晶闸管失火，使用晶闸管触发命令逻辑来产生电平触发信号。电平触发逻辑响应于电平触发信号，但不响应噪声或瞬变，并产生允许晶闸管触发的脉冲串使能信号。

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