Circuit with function of normally closed electromagnetic relay

An electromagnetic relay and normally closed technology, which is applied in the field of circuits, can solve the problems of solid relays such as large size, difficulty in selection, and impossibility of installation, and achieve good heat dissipation effect, easy disassembly and maintenance, and simple connection

Active Publication Date: 2012-07-04
AVIC NO 631 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to factors such as the large size of the solid-state relay, which is difficult to install and cannot realize the normally closed function, it cannot be selected.

Method used

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  • Circuit with function of normally closed electromagnetic relay
  • Circuit with function of normally closed electromagnetic relay
  • Circuit with function of normally closed electromagnetic relay

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Embodiment Construction

[0015] see figure 1 , The circuit with normally closed electromagnetic relay function of the present invention consists of an input protection circuit 1, an input sampling detection circuit 2, a signal comparator 3, a normally closed function setting circuit 4, an isolation drive circuit 5, an output protection circuit 6, and a reference circuit 7 And auxiliary power supply 8 composition. The input protection circuit 1, the input sampling detection circuit 2, the signal comparator 3, the normally closed function setting circuit 4, the isolation drive circuit 5 and the output protection circuit 6 are sequentially connected; the reference circuit 7 and the auxiliary power supply 8 are connected to the signal comparator.

[0016] The basic working principle of the circuit of the present invention is that at the beginning of work, the relay is in a normally closed working state, and the output is zero or negative. When there is an input signal, after the signal is compared with t...

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PUM

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Abstract

The invention provides a circuit with the function of a normally closed electromagnetic relay. The replacement circuit comprises an input protection circuit, an input sampling detection circuit, a reference circuit, a signal comparator, a normally closed function setting circuit, an isolation driving circuit and an output protection circuit, wherein the input protection circuit, the input sampling detection circuit, the signal comparator, the normally closed function setting circuit, the isolation driving circuit and the output protection circuit are sequentially connected; and the reference circuit is connected into the signal comparator. The circuit disclosed by the invention is of a discrete circuit capable of replacing the function of the normally closed electromagnetic relay, and the whole circuit is stable to work, high in reliability, strong in universality and convenient to use, and can be used for greatly improving the performance of equipment.

Description

technical field [0001] The invention relates to a circuit with the function of a normally closed electromagnetic relay, in particular to a discrete circuit replacing the function of the normally closed electromagnetic relay. Background technique [0002] In the development of power modules for electronic equipment, there is a circuit that requires that when the input signal is zero (low potential) or open circuit, the output signal is zero (low potential); when the input signal is positive, the output signal is open circuit (no signal), which This function is usually realized by a normally closed electromagnetic relay. The electromagnetic relay uses a contact switch, and the vibration of the armature will cause the vibration of the contact, which will cause greater interference during the opening and closing process. If a large number of relays are used and there are many contact switches, a strong electromagnetic interference wave will be formed, which will seriously pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/72
Inventor 张阿林黄韬庞菁付金泉董晖
Owner AVIC NO 631 RES INST
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