Touch switch circuit with short-circuit resistance function

一种抗短路触摸开关电路

Abstract

本实用新型公开了一种抗短路触摸开关电路,包括双向主回路电流组件、控制电路、开关电路、负载、电源、整流电路、稳压电路和触摸电路,双向主回路电流组件与控制电路相连接,控制电路通过开关电路与负载相连接,负载与电源连接,稳压电路分别与控制电路和触摸电路相连接,触摸电路依次通过RS触发器、双D触发器与控制电路相连接,电源通过自生电源单元与整流电路相连接。采用上述结构,本实用新型具有以下优点:1、避免了由交流电源引起的交流干扰;2、解决了交流二线电路的附加通态压降大的问题,从而开创了交流二线电路大电流运行的前景;3、清除了负载短路瞬间或过流期间对控制电路电源的影响;4、提供负载短路和过流的信号。
The utility model discloses a touch switch circuit with a short-circuit resistance function, which comprises a bidirectional main loop current component, a control circuit, a switch circuit, a load, a power supply, a rectifier circuit, a voltage stabilizing circuit and a touch circuit, wherein the bidirectional main loop current component is connected with the control circuit, the control circuit is connected with the load through the switch circuit, the load is connected with the power supply, the voltage stabilizing circuit is respectively connected with the control circuit and the touch circuit, the touch circuit is connected with the control circuit sequentially through an RS (reset-set) trigger and a double-D trigger, and the power supply is connected with the rectifier circuit through a self-producing power unit. By adopting above structure, the touch switch circuit with the short-circuit resistance function has the advantages of 1, avoiding alternating current interferences caused by an alternating current power supply, 2, solving the problem that normally additional voltage drop of an alternating current two wire circuit is high and thereby initiating heavy-current circulation of the alternating current two-wire circuit, 3, eliminating influence to the control circuit and the power supply in an instant load short circuit or during an overcurrent period, and 4, providing signals for the load short circuit and overcurrent.

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