CN202353183U - AC overvoltage off protection circuit - Google Patents
AC overvoltage off protection circuit Download PDFInfo
- Publication number
- CN202353183U CN202353183U CN2011204662991U CN201120466299U CN202353183U CN 202353183 U CN202353183 U CN 202353183U CN 2011204662991 U CN2011204662991 U CN 2011204662991U CN 201120466299 U CN201120466299 U CN 201120466299U CN 202353183 U CN202353183 U CN 202353183U
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- overvoltage
- pfc
- input
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Protection Of Static Devices (AREA)
Abstract
The utility model provides an alternating current (AC) overvoltage off protection circuit, relating to the technical field of the design of AC input overvoltage protection circuits of high-frequency switch power supplies. The AC overvoltage off protection circuit comprises an AC voltage sampling and comparing circuit, a power factor correction (PFC) voltage sampling and comparing circuit and an overvoltage off executive circuit, wherein the input end of a rectification PFC filter circuit is connected with the output end of the overvoltage off executive circuit; the output end of the AC voltage sampling and comparing circuit and the output end of the PFC voltage sampling and comparing circuit are connected with the input end of an overvoltage off control circuit respectively; and the output end of the overvoltage off control circuit is connected with the input end of the overvoltage off executive circuit. The AC overvoltage off protection circuit overcomes the defects that the conventional module cannot withstand over-high AC voltage and can be applied to single-phase input rectifier modules; and when the voltage of a power grid is higher than the protection point voltage set by the module, a rectifier bridge and a main circuit are separated from AC, so that high-voltage busbar electrolytic capacitors are protected from being damaged by overvoltage failure.
Description
Technical field
The utility model relates to the design field that high frequency switch power exchanges protection circuit against input over-voltage.
Background technology
Traditional high frequency switch power protection circuit against input over-voltage, main detection module input ac voltage, when the module input voltage exceeded standard, module control circuit turn-offed metal-oxide-semiconductor, and relay is threaded off, and the protection metal-oxide-semiconductor is not damaged.Have following shortcoming in the actual use of traditional high frequency switch power protection circuit against input over-voltage:
1, circuit can only be protected metal-oxide-semiconductor;
2, when the module input ac voltage is too high, metal-oxide-semiconductor also can damage because of too high voltages;
3, circuit can not be protected the input rectifying bridge;
4, circuit can not be protected the input electrochemical capacitor.
Summary of the invention
The utility model purpose is to propose a kind of interchange over-voltage breaking protective circuit that can overcome the prior art defective.
The utility model comprises alternating voltage sampling and the comparison circuit that is connected EMC ac filter circuit output, PFC voltage sample and the comparison circuit that is connected rectification PFC filter circuit output; Also be connected with the over-voltage breaking executive circuit at EMC ac filter circuit output; Said rectification PFC filter circuit input is connected with the output of said over-voltage breaking executive circuit; The output of said alternating voltage sampling and comparison circuit and PFC voltage sample and comparison circuit is connected to the input of over-voltage breaking control circuit, and the output of said over-voltage breaking control circuit is connected the input of over-voltage breaking executive circuit.
The utility model is made up of 4 circuit: alternating voltage sampling and comparison circuit, PFC voltage sample and comparison circuit, over-voltage breaking control circuit, over-voltage breaking circuit; The conventional module that overcome the utility model can not stand the shortcoming of too high alternating voltage; Can be applicable in the single-phase input rectifying module; When line voltage is higher than module settings protection point voltage, rectifier bridge and main circuit are separated with alternating current, thereby being unlikely to the overvoltage inefficacy, damages protection high voltage bus electrochemical capacitor.
The utlity model has following advantage:
1, circuit can be protected metal-oxide-semiconductor;
2, when the module input ac voltage is too high, metal-oxide-semiconductor can not damage because of too high voltages yet;
3, circuit can be protected the input rectifying bridge;
4, circuit can be protected the input electrochemical capacitor.
The utility model is applicable to the single-phase input of high frequency switch power AC/DC module, and below the power output 3000W, operating voltage range is 85～300Vac, over-voltage protection point 305 ± 5Vac, and module can be born 300～415Vac input and do not damaged.
Description of drawings
Fig. 1 is the theory diagram of the utility model.
Fig. 2 is the utility model circuit theory diagrams.
Embodiment
As shown in Figure 1; The utility model is provided with alternating voltage sampling and the comparison circuit 4 that is connected EMC ac filter circuit 1 output, PFC voltage sample and the comparison circuit 5 that is connected rectification PFC filter circuit 3 outputs; Output at EMC ac filter circuit 1 also is connected with over-voltage breaking executive circuit 2; The input of rectification PFC filter circuit 3 is connected with the output of over-voltage breaking executive circuit 2; The output of alternating voltage sampling and comparison circuit 4 and PFC voltage sample and comparison circuit 5 is connected to the input of over-voltage breaking control circuit 6, and the output of over-voltage breaking control circuit 6 is connected the input of over-voltage breaking executive circuit 2.
Among Fig. 2: the alternating voltage sample circuit is gathered the peak values of ac voltage signal of EMC ac filter circuit output, and peak voltage signal is amplified and set and protect voltage ratio; The PFC voltage sampling circuit is gathered the PFC bus voltage signal, and the PFC busbar voltage is protected voltage ratio with setting; Be not higher than setting protection voltage simultaneously like peak voltage signal and PFC bus voltage signal; Or peak voltage signal and PFC bus voltage signal are set protection voltage when all being lower than; Over-voltage breaking control circuit attonity signal, input AC electricity are normally supplied power to rectification PFC filter circuit.Be higher than simultaneously when setting protection voltage like peak values of ac voltage signal and PFC bus voltage signal; The over-voltage breaking control circuit breaks away from through output overvoltage behind the comparison circuit carries out signal; The control over-voltage breaking circuit breaks off, and makes the disconnection of rectification PFC filter circuit and input AC circuit and quits work.After 7 seconds, when the PFC busbar voltage discharges into to a certain degree (being return difference), when setting protection voltage when the PFC bus voltage signal is lower than, control the over-voltage breaking circuit closure, the charging of PFC busbar voltage is risen, and breaks off again up to the PFC bus overvoltage.So repeatedly.The PFC bus capacitor can overvoltage stress like this, thereby be effectively protected.
The utility model circuit design is quick, reliable operation, and utilization has improved the performance of high frequency switch power flexibly greatly.
Claims (1)
1. one kind exchanges the over-voltage breaking protective circuit; It is characterized in that comprising alternating voltage sampling and the comparison circuit that is connected EMC ac filter circuit output, PFC voltage sample and the comparison circuit that is connected rectification PFC filter circuit output; Also be connected with the over-voltage breaking executive circuit at EMC ac filter circuit output; Said rectification PFC filter circuit input is connected with the output of said over-voltage breaking executive circuit; The output of said alternating voltage sampling and comparison circuit and PFC voltage sample and comparison circuit is connected to the input of over-voltage breaking control circuit, and the output of said over-voltage breaking control circuit is connected the input of over-voltage breaking executive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204662991U CN202353183U (en) | 2012-04-16 | 2012-04-16 | AC overvoltage off protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204662991U CN202353183U (en) | 2012-04-16 | 2012-04-16 | AC overvoltage off protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202353183U true CN202353183U (en) | 2012-07-25 |
Family
ID=46542148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204662991U Expired - Lifetime CN202353183U (en) | 2012-04-16 | 2012-04-16 | AC overvoltage off protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202353183U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426137A (en) * | 2013-08-26 | 2015-03-18 | 深圳市朗科智能电气股份有限公司 | Over-voltage protection circuit of single-stage PFC circuit MOS tube |
| CN105071652A (en) * | 2015-09-22 | 2015-11-18 | 广东志高暖通设备股份有限公司 | Control Boost PFC circuit |
| CN110858712A (en) * | 2018-08-24 | 2020-03-03 | 绿星研发印度私人有限公司 | System for protecting solid state electronic devices from over-voltage and/or under-voltage conditions |
| CN115513901A (en) * | 2022-09-30 | 2022-12-23 | 陕西航空电气有限责任公司 | Overvoltage protection circuit of aviation alternating-current generator |
-
2012
- 2012-04-16 CN CN2011204662991U patent/CN202353183U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104426137A (en) * | 2013-08-26 | 2015-03-18 | 深圳市朗科智能电气股份有限公司 | Over-voltage protection circuit of single-stage PFC circuit MOS tube |
| CN104426137B (en) * | 2013-08-26 | 2017-11-07 | 深圳市朗科智能电气股份有限公司 | Single- stage PFC circuit metal-oxide-semiconductor overvoltage crowbar |
| CN105071652A (en) * | 2015-09-22 | 2015-11-18 | 广东志高暖通设备股份有限公司 | Control Boost PFC circuit |
| CN105071652B (en) * | 2015-09-22 | 2018-02-02 | 广东志高暖通设备股份有限公司 | One kind control Boost type pfc circuit |
| CN110858712A (en) * | 2018-08-24 | 2020-03-03 | 绿星研发印度私人有限公司 | System for protecting solid state electronic devices from over-voltage and/or under-voltage conditions |
| CN115513901A (en) * | 2022-09-30 | 2022-12-23 | 陕西航空电气有限责任公司 | Overvoltage protection circuit of aviation alternating-current generator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201590645U (en) | AC input over-voltage and under-voltage protection device for electric apparatus | |
| CN204205552U (en) | The under-voltage over-voltage detection circuit of a kind of AC | |
| CN203151236U (en) | Cable line arrester on-line monitoring system power supply | |
| CN202353183U (en) | AC overvoltage off protection circuit | |
| CN102412720A (en) | Switching power circuit and power factor correction (PFC) control circuit thereof | |
| CN203491680U (en) | Automatic reset electric leakage overvoltage/undervoltage protection circuit | |
| CN203225578U (en) | A power transmission line induction energy acquiring power supply apparatus with a high redundancy feature | |
| CN202550694U (en) | CT (current transformer) power taking circuit allowing for reducing heat of CT | |
| CN204089173U (en) | A kind of frequency changer direct current bus voltage protection circuit | |
| CN103715748A (en) | Lithium battery charging circuit | |
| CN204515039U (en) | Fault detector | |
| CN206977324U (en) | Power circuit for low-voltage circuit breaker | |
| CN103543322A (en) | Leak current detection device for photovoltaic grid-connected inverter | |
| CN103364628A (en) | Residual current signal conditioning circuit | |
| CN202888950U (en) | Uninterruptible power supply module for intelligent transportation system | |
| CN204258298U (en) | A kind of low-pressure energy-saving stable-pressure device | |
| CN205945018U (en) | Dropout protection circuit that resistance -capacitance pressure reducing type is under -voltage | |
| CN106026016B (en) | A kind of capacitance-resistance step down type undervoltage tripping protection circuit | |
| CN205059481U (en) | Motormeter power supply circuit | |
| CN203817592U (en) | Inverter welder circuit powered by generator | |
| CN203027133U (en) | Starting circuit based on quasi-resonance controller | |
| CN103532217A (en) | Uninterruptible power source system | |
| CN204206014U (en) | A kind of 3KW photovoltaic combining inverter | |
| CN201853261U (en) | Self-service charging machine with overvoltage-overcurrent protection circuit | |
| CN202172254U (en) | Digital recognition electric power limiting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: JIANGSU ZHONGLING HIGH-TECH CO., LTD. Free format text: FORMER NAME: JIANGSU ZHONGLING HI-TECH DEVELOPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 225008, No. 168 East Shu Shu Road, Weiyang District, Jiangsu, Yangzhou Patentee after: Jiangsu ATrend high-tech incorporated company Address before: 225008, No. 168 East Shu Shu Road, Weiyang District, Jiangsu, Yangzhou Patentee before: Jiangsu Zhongling Hi-Tech Development Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |