公开(公告)号：US3949239A

公开(公告)日：1976-04-06

申请号：US482042

申请日：1974-06-24

申请人： Henry W. T. Dutton

发明人： Henry W. T. Dutton

IPC分类号： H01F7/06 ,  H02H7/085 ,  H01H47/02 ,  H01H51/34

CPC分类号： H01F7/064 ,  H02H7/085 ,  H02H7/0852

摘要： This relates to an ac circuit for actuating a monostable or bistable inductive device in response to the opening of a normally closed switch. A capacitor is provided in series with the parallel combination of an inductive switching element and a normally-closed switch. When the normally closed switch opens, there results a series circuit consisting of the inductive switching element and the capacitor which, when properly chosen, will have a capacitive reactance which substantially cancels the inductive reactance of the switching element, thereby substantially reducing the overall circuit impedance. This clearly reduces heat dissipation and insures sufficient voltage across the inductive element to cause actuation.

摘要翻译： 这涉及用于响应于常闭开关的打开而致动单稳态或双稳态感应装置的交流电路。 电感器与感性开关元件和常闭开关的并联组合串联设置。 当常闭开关断开时，会产生一个由感性开关元件和电容组成的串联电路，当正确选择时，其将具有基本上抵消开关元件的感抗的电容性电抗，从而大大降低总体电路阻抗 。 这显然降低了散热，并确保电感元件上的足够的电压引起致动。