CN106300269A - 一种稳压式过电流断电指示电路 - Google Patents

一种稳压式过电流断电指示电路 Download PDF

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CN106300269A
CN106300269A CN201610725032.7A CN201610725032A CN106300269A CN 106300269 A CN106300269 A CN 106300269A CN 201610725032 A CN201610725032 A CN 201610725032A CN 106300269 A CN106300269 A CN 106300269A
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electric capacity
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Chengdu Co Ltd Of Hat Shenzhen Science And Technology
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Chengdu Co Ltd Of Hat Shenzhen Science And Technology
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02Details
    • H02H3/04Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1203Circuits independent of the type of conversion

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

本发明公开了一种稳压式过电流断电指示电路,其特征在于:主要由三端稳压器U,三极管VT1,三极管VT2,三极管VT3,三极管VT4,晶闸管VC,指示灯BL,电阻R1,电阻R2,电阻R3,电阻R4,电阻R5,电阻R6,滑动变阻器RP,电容C1,电容C2,电容C3,电容C4,稳压二极管D1以及二极管D2组成。本发明不仅结构简单,而且成本低廉,还能在过电流时断开电源,因此可防止电路过电流时损坏电源;同时还能通过指示灯提示用户,以便于用户能及时处理过电流的情况,适合推广运用。

Description

一种稳压式过电流断电指示电路
技术领域
本发明涉及一种过电流保护电路,尤其涉及一种稳压式过电流断电指示电路。
背景技术
随着科学技术的发展,电子技术得以迅猛发展,电子产品种类越来越丰富,各种各样的电子产品进入到普通人们的家庭,使得人们的日常生活也离不开电子产品。电子产品毫无疑问需要使用电,而在用电过程中容易出现过电流的情况,过电流容易造成电路异常,严重的甚至会损坏电源。
发明内容
本发明的目的在于提供一种稳压式过电流断电指示电路,以期待能在过电流时断开电源,从而可保护电源;同时还能通过指示灯提示用户,以便于用户能及时处理过电流的情况。
本发明通过下述技术方案实现:
一种稳压式过电流断电指示电路,主要由三端稳压器U,三极管VT1,三极管VT2,三极管VT3,三极管VT4,晶闸管VC,正极经指示灯BL后与晶闸管VC的P极相连接、负极与晶闸管VC的N极相连接的电容C1,串接在三极管VT2的发射极与三端稳压器U的VIN管脚之间的电阻R1,一端与三极管VT2的发射极相连接、另一端与三端稳压器U的VIN管脚相连接、控制极与三极管VT3的基极相连接的滑动变阻器RP,串接在三极管VT3的集电极与晶闸管VC的控制极之间的电阻R2,串接在晶闸管VC的控制极与电容C1的负极之间的电阻R3,正极与三端稳压器U的GND管脚相连接、负极经电阻R4后与电容C1的负极相连接的电容C2,P极与三端稳压器U的VOUT管脚相连接、N极与三极管VT4的发射极相连接的稳压二极管D1,正极与三极管VT4的集电极相连接、负极经电阻R5后与三端稳压器U的GND管脚相连接的电容C3,P极与电容C2的负极相连接、N极经电阻R6后与三极管VT4的基极相连接的二极管D2,以及正极与三极管VT4的集电极相连接、负极与二极管D2的P极相连接的电容C4组成;所述三极管VT1的基极与晶闸管VC的P极相连接,其集电极分别与电容C1的正极和三极管VT2的集电极相连接,其发射极与三极管VT2的基极相连接;所述三极管VT2的发射极与三极管VT3的发射极相连接,所述电容C3的负极与二极管D2的N极相连接;所述电容C1的正极与负极共同组成整个指示电路的输入端,所述电容C4的正极与负极共同组成整个指示电路的输出端。
本发明与现有技术相比,具有以下优点及有益效果:
本发明不仅结构简单,而且成本低廉,还能在过电流时断开电源,因此可防止电路过电流时损坏电源;同时还能通过指示灯提示用户,以便于用户能及时处理过电流的情况。
附图说明
图1为本发明的整体结构示意图。
具体实施方式
下面结合实施例对本发明作进一步地详细说明,但本发明的实施方式不限于此。
实施例
如图1所示,本发明的稳压式过电流断电指示电路,主要由三端稳压器U,三极管VT1,三极管VT2,三极管VT3,三极管VT4,晶闸管VC,指示灯BL,电阻R1,电阻R2,电阻R3,电阻R4,电阻R5,电阻R6,滑动变阻器RP,电容C1,电容C2,电容C3,电容C4,稳压二极管D1以及二极管D2组成。其中,所述的晶闸管VC采用的是单向晶闸管。
连接时,所述电容C1的正极经指示灯BL后与晶闸管VC的P极相连接,其负极与晶闸管VC的N极相连接。所述电阻R1串接在三极管VT2的发射极与三端稳压器U的VIN管脚之间;所述滑动变阻器RP的一端与三极管VT2的发射极相连接,其另一端与三端稳压器U的VIN管脚相连接,其控制极与三极管VT3的基极相连接。所述电阻R2串接在三极管VT3的集电极与晶闸管VC的控制极之间,所述电阻R3串接在晶闸管VC的控制极与电容C1的负极之间。所述电容C2的正极与三端稳压器U的GND管脚相连接,其负极经电阻R4后与电容C1的负极相连接。所述稳压二极管D1的P极与三端稳压器U的VOUT管脚相连接,其N极与三极管VT4的发射极相连接。所述电容C3的正极与三极管VT4的集电极相连接,其负极经电阻R5后与三端稳压器U的GND管脚相连接。所述二极管D2的P极与电容C2的负极相连接,其N极经电阻R6后与三极管VT4的基极相连接。所述电容C4的正极与三极管VT4的集电极相连接,其负极与二极管D2的P极相连接。
同时,所述三极管VT1的基极与晶闸管VC的P极相连接,其集电极分别与电容C1的正极和三极管VT2的集电极相连接,其发射极与三极管VT2的基极相连接。所述三极管VT2的发射极与三极管VT3的发射极相连接,所述电容C3的负极与二极管D2的N极相连接。所述电容C1的正极与负极共同组成整个指示电路的输入端,该输入端可直接连接外部电源。所述电容C4的正极与负极共同组成整个指示电路的输出端,该输出端连接电子产品负载。
使用时,当电流过载时,晶闸管VC导通,三极管VT1与三极管VT2截止,即可切断电源,从而能保护电源不被损坏;同时,指示灯BL点亮,即可提示用户,以便于用户能及时处理过电流的情况。正常使用时,所述三端稳压器U与稳压二极管D1以及电容C2等组成的稳压电路还可对输入本发明的指示电路进行稳压处理,以便于为电阻产品负载提供稳定的电压。
如上所述,便可较好的实现本发明。

Claims (1)

1.一种稳压式过电流断电指示电路,其特征在于:主要由三端稳压器U,三极管VT1,三极管VT2,三极管VT3,三极管VT4,晶闸管VC,正极经指示灯BL后与晶闸管VC的P极相连接、负极与晶闸管VC的N极相连接的电容C1,串接在三极管VT2的发射极与三端稳压器U的VIN管脚之间的电阻R1,一端与三极管VT2的发射极相连接、另一端与三端稳压器U的VIN管脚相连接、控制极与三极管VT3的基极相连接的滑动变阻器RP,串接在三极管VT3的集电极与晶闸管VC的控制极之间的电阻R2,串接在晶闸管VC的控制极与电容C1的负极之间的电阻R3,正极与三端稳压器U的GND管脚相连接、负极经电阻R4后与电容C1的负极相连接的电容C2,P极与三端稳压器U的VOUT管脚相连接、N极与三极管VT4的发射极相连接的稳压二极管D1,正极与三极管VT4的集电极相连接、负极经电阻R5后与三端稳压器U的GND管脚相连接的电容C3,P极与电容C2的负极相连接、N极经电阻R6后与三极管VT4的基极相连接的二极管D2,以及正极与三极管VT4的集电极相连接、负极与二极管D2的P极相连接的电容C4组成;所述三极管VT1的基极与晶闸管VC的P极相连接,其集电极分别与电容C1的正极和三极管VT2的集电极相连接,其发射极与三极管VT2的基极相连接;所述三极管VT2的发射极与三极管VT3的发射极相连接,所述电容C3的负极与二极管D2的N极相连接;所述电容C1的正极与负极共同组成整个指示电路的输入端,所述电容C4的正极与负极共同组成整个指示电路的输出端。
CN201610725032.7A 2016-08-25 2016-08-25 一种稳压式过电流断电指示电路 Pending CN106300269A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109617020A (zh) * 2018-12-28 2019-04-12 无锡新大力电机有限公司 低成本电机驱动器传感器供电过载保护电路
WO2022100267A1 (zh) * 2020-11-12 2022-05-19 深圳Tcl数字技术有限公司 过流保护触发电路及装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109617020A (zh) * 2018-12-28 2019-04-12 无锡新大力电机有限公司 低成本电机驱动器传感器供电过载保护电路
WO2022100267A1 (zh) * 2020-11-12 2022-05-19 深圳Tcl数字技术有限公司 过流保护触发电路及装置

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Application publication date: 20170104