发明授权
US5576919A Spark suppressor circuit for protection of an electrical switch, and
electrical thermal appliance comprising such a circuit
失效
用于保护电气开关的火花抑制器电路，以及包括这种电路的电热器具
- 专利标题： Spark suppressor circuit for protection of an electrical switch, and electrical thermal appliance comprising such a circuit
- 专利标题（中）： 用于保护电气开关的火花抑制器电路，以及包括这种电路的电热器具
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申请号： US243895申请日： 1994-05-17
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公开(公告)号： US5576919A公开(公告)日： 1996-11-19
- 发明人: Bernardus F. R. I. Wilkens
- 申请人： Bernardus F. R. I. Wilkens
- 申请人地址： NY New York
- 专利权人： U.S. Philips Corporation
- 当前专利权人： U.S. Philips Corporation
- 当前专利权人地址： NY New York
- 优先权： EPX93201553 19930601
- 主分类号： H01H9/54
- IPC分类号： H01H9/54 ; H01G2/12
摘要：
A spark suppressor circuit (1) is provided for protection of an electrical switch (4) which in series with a load (2) is connected between a first supply voltage terminal (8) and a second supply voltage terminal (10), the load (2) and the electrical switch (4) being interconnected at a switch terminal (6). The spark suppressor circuit (1) comprises: a first (12), a second (14) and a third (16) connection terminal connectable to the first supply voltage terminal (8), the second supply voltage terminal (10) and the switch terminal (6), respectively, a triac (18) having a first main electrode (20) connected to the third connection terminal (16), having a second main electrode (22) connected to the second connection terminal (14), having a gate electrode (24) connected to the first connection terminal (12) via a resistor (32), a diac (26) connected between the gate electrode (24) and a node (28), and a capacitor (30) connected between the node (28) and the third connection terminal (16), the resistor (32) being coupled between the first connection terminal (12) and the node (28) to supply a current in response to a voltage difference between the first connection terminal (12) and the third connection terminal (16).
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