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High-reliable single-chip microcomputer control relay device

A single-chip microcomputer control and relay technology, which is applied in the direction of relays, circuits, electrical components, etc., can solve problems such as incorrect actions, dead relays, and single-chip microcomputers are susceptible to interference, and achieve the effect of improving reliability and anti-interference

Active Publication Date: 2013-03-13
BEIJING ESD POWER COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a high-reliability single-chip microcomputer control relay device to solve the problem that the single-chip microcomputer is easily disturbed in the power system with harsh electromagnetic environment, resulting in reset and crash, which in turn causes incorrect action of the relay.

Method used

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  • High-reliable single-chip microcomputer control relay device

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specific Embodiment

[0047] The electromagnetic relay control device with power enablement of the present invention includes: a logic module 101, a latch module 102, a drive module 103, a power supply module 104, a relay 105, a relay detection module 106, a relay control port 107, and a reset signal port 108 and enable signal IO port 109; wherein,

[0048] The logic module 101 is composed of two NOT gates and an AND gate; the latch module 102 is composed of 74HC573 (bus latch); the driving module 103 is composed of a Darlington array (ULN2003); the power supply The module 104 is composed of a power supply circuit and a relay protection circuit, wherein the power supply circuit includes a triode and a field effect transistor for amplifying the power control output of the single-chip microcomputer; the relay protection circuit includes at least two freewheeling diodes for protecting the relay coil The relay 105 can be an electromagnetic relay, and of course there is no specific limitation on which r...

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Abstract

The invention provides a high-reliable single-chip microcomputer control relay device. The device is connected to a single-chip microcomputer and is applied to an external circuit. The device is characterized by comprising a logic module, a latch module, a drive module, a power supply module, a relay, a relay detection module, a relay control port, a reset signal port and an enabling signal input output (IO) port. Functions such as relay coil state back verification, main control switching, power-on mal-operation prevention and relay state latch are achieved, a system can run reliably under the condition that the single-chip microcomputer, a control loop and the relay are in the abnormal state, the functions such as interference resistance of the control loop, the element fault automatic detection and self-locking are improved effectively and the reliability of the system is greatly improved.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a high-reliability single-chip microcomputer control relay device. Background technique [0002] Relay (relay) is an electrical control device, which is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change of the input quantity (excitation quantity) meets the specified requirements. It has an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in automatic control circuits, it is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. [0003] As an automatic control device, the relay protection device is mainly responsible fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H47/00
Inventor 李伟杜增坡谢建新梁东辛建明
Owner BEIJING ESD POWER COMM
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