CN101378194A - 电压保护电路 - Google Patents

电压保护电路 Download PDF

Info

Publication number
CN101378194A
CN101378194A CNA2007102014899A CN200710201489A CN101378194A CN 101378194 A CN101378194 A CN 101378194A CN A2007102014899 A CNA2007102014899 A CN A2007102014899A CN 200710201489 A CN200710201489 A CN 200710201489A CN 101378194 A CN101378194 A CN 101378194A
Authority
CN
China
Prior art keywords
voltage
protection circuit
inductance coil
resistor
alarming device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CNA2007102014899A
Other languages
English (en)
Other versions
CN101378194B (zh
Inventor
侯全才
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Original Assignee
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Priority to CN2007102014899A priority Critical patent/CN101378194B/zh
Priority to US11/949,054 priority patent/US7639467B2/en
Publication of CN101378194A publication Critical patent/CN101378194A/zh
Application granted granted Critical
Publication of CN101378194B publication Critical patent/CN101378194B/zh
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
    • H02H11/006—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

一种电压保护电路包括一电压输入端、一继电器、一警示装置、一稳压二极管、一第一电阻器及一电压输出端，所述继电器包括一电感线圈和一开关，所述电压输入端经所述第一电阻器连接所述电压输出端，还经所述开关接地，所述电压输入端还连接所述电感线圈的一端，所述电感线圈的另一端经所述警示装置接地，所述电压输出端与所述稳压二极管的阴极连接，所述稳压二极管的阳极接地。所述电压保护电路防止连接器接反时，后端电路或装置被烧毁。

Description

电压保护电路
技术领域
本发明涉及一种电压保护电路。
背景技术
连接器泛指所有用于电子信号或电源连接的组件及其附属组件，主要功能为接通电路或连接电子装置以传输电源或信号。连接器是所有信号间的桥梁，其不仅影响电子装置间信号传输的可靠度，而且决定着电子设备的整体运作。连接器广泛运用于电脑及其周边设备、通讯、消费性电子、交通运输等领域。目前4芯连接器的电压分为12V与5V，使用者在不注意时可能将电压插反，虽然这种连接器有些有防呆设计，但由于连接器使用过久发生老化或材料不良等原因导致防呆功能丧失，使用者在不注意时还是可能将电压插反，导致后端电路或装置烧毁，给使用带来许多安全隐患。
发明内容
鉴于上述内容，有必要提供一种电压保护电路，对后端电路或装置进行有效的保护。
一种电压保护电路包括一电压输入端、一继电器、一警示装置、一稳压二极管、一第一电阻器及一电压输出端，所述继电器包括一电感线圈和一开关，所述电压输入端经所述第一电阻器连接所述电压输出端，还经所述开关接地，所述电压输入端还连接所述电感线圈的一端，所述电感线圈的另一端经所述警示装置接地，所述电压输出端与所述稳压二极管的阴极连接，所述稳压二极管的阳极接地。
相较现有技术，所述电压保护电路同连接器和后端电路或装置连通时，如果连接器接反，则所述继电器控制所述警示装置发出警示，同时所述稳压二极管控制输出电压在一额定值以下，从而避免了后端电路或装置被烧毁。
附图说明
下面参照附图结合具体实施方式对本发明作进一步详细描述：
图1为本发明电压保护电路的具体实施方式的电路图。
具体实施方式
请参照图1，本发明电压保护电路的具体实施方式包括一电压输入端10、一继电器20、一警示装置30、一稳压二极管Z、一第一电阻器R1及一电压输出端40。所述继电器20包括一电感线圈L1和一开关K1。所述警示装置30包括一第二电阻器R2、一发光二极管D1及一蜂鸣器U1。
所述电压输入端10经所述第一电阻器R1连接所述电压输出端40，还经所述开关K1接地，所述电压输入端10还连接所述电感线圈L1的一端，所述电感线圈L1的另一端经所述第二电阻器R2连接所述发光二极管D1的阳极，所述发光二极管D1的阴极经所述蜂鸣器U1接地，所述电压输出端40与所述稳压二极管Z的阴极连接，所述稳压二极管Z的阳极接地，所述稳压二极管Z为一5V稳压二极管。
下面以4芯连接器举例说明，所述电压保护电路连接在一母头连接器的5V电压端，当一公头连接器与所述母头连接器正常连接时，即12V和5V电压端分别提供正常的电压值，所述电压保护电路的电压输入端10得到一5V的输入电压，所述继电器20具有一开启电压，此时所述电压输入端10的输入电压小于所述继电器20的开启电压，所述继电器20不会被开启，与其相连的所述警示装置30不会启动，所述二极管D1不发光，所述蜂鸣器U1也不会发出警示音，所述电压输出端40输出稳定的5V电压提供给后端电路或装置工作。
当使用者误将所述公头连接器与所述母头连接器接反时，即所述公头连接器的12V电压输入到所述母头连接器的5V电压端，所述电压保护电路的电压输入端10得到一12V的输入电压，此时所述电压输入端10的输入电压大于所述继电器20的开启电压，所述继电器20被开启，与其相连的所述警示装置30启动，所述二极管D1发光，所述蜂鸣器U1发出警示音提醒使用者连接器接反，同时所述电压输入端10得到的12V输入电压经过所述稳压二极管Z稳压后，在所述电压输出端40被降低至5V，从而起到了保护后端电路或装置的作用。

Claims (4)

  1. 【权利要求1】一种电压保护电路，包括一电压输入端、一继电器、一警示装置、一稳压二极管、一第一电阻器及一电压输出端，所述继电器包括一电感线圈和一开关，所述电压输入端分别经所述第一电阻器连接所述电压输出端、经所述开关接地及连接所述电感线圈的一端，所述电感线圈的另一端经所述警示装置接地，所述电压输出端与所述稳压二极管的阴极连接，所述稳压二极管的阳极接地。
  2. 【权利要求2】如权利要求1所述的电压保护电路，其特征在于：所述警示装置包括一蜂鸣器，所述蜂鸣器连接在所述电感线圈与地之间。
  3. 【权利要求3】如权利要求1所述的电压保护电路，其特征在于：所述警示装置包括一发光二极管，所述发光二极管的阳极连接所述电感线圈的另一端，其阴极接地。
  4. 【权利要求4】如权利要求3所述的电压保护电路，其特征在于：所述警示装置还包括一第二电阻器，所述第二电阻器串接于所述发光二极管的阳极与所述电感线圈的另一端之间。
CN2007102014899A 2007-08-28 2007-08-28 电压保护电路 Expired - Fee Related CN101378194B (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2007102014899A CN101378194B (zh) 2007-08-28 2007-08-28 电压保护电路
US11/949,054 US7639467B2 (en) 2007-08-28 2007-12-03 Over-voltage protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2007102014899A CN101378194B (zh) 2007-08-28 2007-08-28 电压保护电路

Publications (2)

Publication Number Publication Date
CN101378194A true CN101378194A (zh) 2009-03-04
CN101378194B CN101378194B (zh) 2012-05-30

Family

ID=40407089

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2007102014899A Expired - Fee Related CN101378194B (zh) 2007-08-28 2007-08-28 电压保护电路

Country Status (2)

Country Link
US (1) US7639467B2 (zh)
CN (1) CN101378194B (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104037883A (zh) * 2014-06-26 2014-09-10 中国地质大学（武汉） 一种电池供电的过压欠压锁定、28v稳压保护电路

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8743523B2 (en) 2010-07-28 2014-06-03 General Electric Company Systems, methods, and apparatus for limiting voltage across a switch
US10283958B2 (en) 2016-11-08 2019-05-07 Teradyne, Inc. Protection circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5532894A (en) * 1994-07-11 1996-07-02 Minnesota Mining And Manufacturing Company Overvoltage protection circuit
US6556410B1 (en) * 1998-07-24 2003-04-29 American Power Conversion, Inc. Universal surge protector for notebook computers
US6856242B2 (en) * 2003-02-04 2005-02-15 Spiral Technologies Ltd. Automatic siren silencing device for false alarms

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104037883A (zh) * 2014-06-26 2014-09-10 中国地质大学（武汉） 一种电池供电的过压欠压锁定、28v稳压保护电路

Also Published As

Publication number Publication date
US20090059456A1 (en) 2009-03-05
CN101378194B (zh) 2012-05-30
US7639467B2 (en) 2009-12-29

Similar Documents

Publication Publication Date Title
US6902412B2 (en) Apparatus for intrinsically safe power interface
US20100301828A1 (en) Power management circuit and electronic device
AU6107700A (en) Intelligent identifiable connectors
US20090315538A1 (en) Signal generating circuit for detecting ground status
CN101378194B (zh) 电压保护电路
US20090279334A1 (en) Electronic device and switching power supply thereof
CN103144542A (zh) 一种自动断电控制系统
US20120280822A1 (en) Power receptacle current displaying and alert device for detecting current state of power receptacle and receptacle having the saem
US20120156923A1 (en) Connection line
CN210038763U (zh) 一种操作系统离线状态下usb设备插拔检测电路
CN201477166U (zh) 工作地线失效自动检测模块
US20090140578A1 (en) Electronic device with compound audio interface and power adapter
TW200703611A (en) Semiconductor integrated circuit device
CN105137140A (zh) 一种防电量飞走的单相电子式电能表
US20140347063A1 (en) Fan test device
US20140043036A1 (en) Detection circuit and detection method
CN103869897A (zh) 转接卡及使用该转接卡的电子装置
US10978747B2 (en) Leakage detection device and battery pack having the same
US8988234B2 (en) Alarm system
US20120280672A1 (en) Power supply circuit for universal serial bus port
US20120056611A1 (en) Connection detection circuit
CN204696910U (zh) 一种防止电源上电直接加载的电路
EP1980932A2 (en) Protection circuit and electronic device
CN209880980U (zh) 智能断电的数据线
CN219779770U (zh) 一种防爆保护装置及防爆电子设备

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120530

Termination date: 20140828

EXPY Termination of patent right or utility model