CN2322299Y - Quick overvoltage protector for constant-current high-voltage direct-current power supply - Google Patents
Quick overvoltage protector for constant-current high-voltage direct-current power supply Download PDFInfo
- Publication number
- CN2322299Y CN2322299Y CN 98223103 CN98223103U CN2322299Y CN 2322299 Y CN2322299 Y CN 2322299Y CN 98223103 CN98223103 CN 98223103 CN 98223103 U CN98223103 U CN 98223103U CN 2322299 Y CN2322299 Y CN 2322299Y
- Authority
- CN
- China
- Prior art keywords
- power supply
- overvoltage protector
- voltage
- constant
- quick
- 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 - Fee Related
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
A fast overvoltage protector for a constant-current high-voltage direct-current power supply. The voltage comparator is arranged in a control cabinet of a power supply and is formed by sequentially connecting a sampling unit, a voltage comparison element, an output unit and an execution element in series. All of its components are electronic components. Therefore, compared with the mechanical delay action formed by a relay in the prior art, the protection speed is high, the phenomenon that a silicon stack and a transformer winding are broken down is avoided, and the normal operation of a power supply can be ensured.
Description
The utility model is a kind of quick overvoltage protector that is used for constant-current high-voltage DC power supply.
Prior art:
Grandson inventor of Shanghai Optics and Precision Mechanics institute, Chinese Academy of Sciences is that heptan etc. is at utility model patent: ZL86203043.9; the over-voltage protector that is used in constant-current high-voltage DC power supply that is provided is by mechanical relay; the triple promotions that continue of auxiliary relay and A.C. contactor, and make that overvoltage protection is deferred action.The over-voltage protector of this kind structure does not reach protection effectively.Because constant-current supply is in case open circuit, its output voltage is that straight line rises in time, and the speed that rises is very fast, because the mechanical delay slow motion of relay, have little time to cut off the electricity supply and cause output voltage to rise higherly, often cause the puncture of rectification silicon stack and transformer high-voltage winding.
The purpose of this utility model is in order to overcome the defective of the over-voltage protector structure that is adopted in the above-mentioned prior art; design a kind of without mechanical organ; all use the overvoltage protector of electronic component formation; can fast reaction; in a single day overvoltage takes place in power supply, can play a protective role apace at once.
Quick overvoltage protector of the present utility model is by sampling unit 1, voltage comparing element 2, and output unit 3 and executive component 4 are connected successively and are constituted.As Fig. 1, shown in Figure 2.
Contain power filter element 5 and RC filter circuit piece 6 in the said sampling unit 1.As shown in Figure 2.
Said voltage comparing element 2 mainly is made of operational amplifier, operational amplifier such as FM339 or, 556.
Said output unit 3 mainly comprises three parts, and first 7 is by crystal amplifier BG
1With relay J
1Constitute, second portion 8 mainly is a controlled oscillator, and third part 9 mainly is crystal amplifier BG
2With output transformer T
0Constitute.
Said executive component 4 is to be made of the double silicon control module of docking.
In constant-current supply, the requirement of overvoltage protector is required to require on the other hand in industrial electrical network fast on the one hand, as more High-frequency Interference, during narrow pulse interference, though their amplitudes are higher, should be inoperative.The utility model has used power filter element 5 and RC filter circuit piece 6 in sampling unit 1, the output of voltage comparing element 2 is a low level at ordinary times, in case overvoltage takes place, it is high level output.This high level makes controlled oscillator 8 produce square wave, makes the crystal amplifier BG in the output unit 3
2Constantly have pulse to export the controllable silicon of executive component 4 to, make its controllable silicon conducting, with the primary short of high-tension transformer T, voltage is zero, and then secondary voltage also is zero, and the high voltage silicon stack of T level of transformer and line hold group and obtained protection effectively.The high level of voltage comparing element 2 outputs adds to the crystal amplifier BG of output unit 3 simultaneously
1, J
1J has been drawn back in action
0, make the constant-current supply outage and connect report to the police news sound and alarm lamp.
Though J
1And J
0Be mechanical action, took place to be depressed into and draw back J
0One section time-delay is arranged.But in advance because protective effect has been played in the controllable silicon short circuit of executive component 4.
Advantage of the present utility model: the quick overvoltage protector by said structure is used for constant-current high-voltage DC power supply, because whole elements of this novel quick overvoltage protector all are electronic components.So through using proof, its overvoltage protection is fast and effectively.After having used this novel, silicon stack puncture that takes place in the above-mentioned prior art and winding puncture and corresponding maintenance cost all do not had.This link no longer is damaged in the power supply, has also just guaranteed the normal use of power supply and equipment, and therefore the loss that stops production has also just been avoided.
Description of drawings:
Fig. 1 places the structural representation of constant-current high-voltage DC power supply for the quick overvoltage protector of the utility model.
Fig. 2 is the quick overvoltage protector electrical block diagram of the utility model.
Embodiment:
Be connected to the quick overvoltage protector that circuit structure constituted shown in Figure 2 in the control circuit of 2 of A, B of constant-current high-voltage DC power supply high pressure generator primary side as shown in Figure 1.The specification of the butt joint double silicon control module that executive component 4 is got is 110A, and the phenomenon of over-voltage breakdown did not take place owing to load open circuit in using hundreds of constant flow high pressure power supplys of the present utility model again.Guaranteed the safety of power supply, avoided because the power supply that load open circuit caused damages.
Claims (5)
1. a quick overvoltage protector that is used for constant-current high-voltage DC power supply places electrical power control cabinet, it is characterized in that it is connected successively by sampling unit (1), voltage comparing element (2), output unit (3) and executive component (4) and constitute.
2. according to the quick overvoltage protector of claim 1, it is characterized in that sampling unit (1) contains power filter element (5) and RC filter circuit piece (6).
3. according to the quick overvoltage protector of claim 1, it is characterized in that voltage comparing element (2) mainly is made of operational amplifier.
4. according to the quick overvoltage protector of claim 1, it is characterized in that output unit (3) mainly is made of three parts: first (7) is by a crystal amplifier BG
1With relay J
1Constitute, second portion (8) mainly is a controlled oscillator, and third part (9) is mainly by crystal amplifier BG
2With output transformer T
0Constitute.
5. according to the quick overvoltage protector of claim 1, it is characterized in that executive component (4) is to be made of the double silicon control module of docking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98223103 CN2322299Y (en) | 1998-01-20 | 1998-01-20 | Quick overvoltage protector for constant-current high-voltage direct-current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98223103 CN2322299Y (en) | 1998-01-20 | 1998-01-20 | Quick overvoltage protector for constant-current high-voltage direct-current power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2322299Y true CN2322299Y (en) | 1999-06-02 |
Family
ID=33974297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98223103 Expired - Fee Related CN2322299Y (en) | 1998-01-20 | 1998-01-20 | Quick overvoltage protector for constant-current high-voltage direct-current power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2322299Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904619A (en) * | 2012-12-27 | 2014-07-02 | 北京谊安医疗系统股份有限公司 | Switch DC-DC power output overvoltage protection circuit |
| US10263416B2 (en) | 2012-12-03 | 2019-04-16 | Huawei Technologies Co., Ltd. | Overvoltage protection apparatus and method |
-
1998
- 1998-01-20 CN CN 98223103 patent/CN2322299Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10263416B2 (en) | 2012-12-03 | 2019-04-16 | Huawei Technologies Co., Ltd. | Overvoltage protection apparatus and method |
| US11404867B2 (en) | 2012-12-03 | 2022-08-02 | Huawei Techologies Co., Ltd. | Overvoltage protection apparatus and method |
| CN103904619A (en) * | 2012-12-27 | 2014-07-02 | 北京谊安医疗系统股份有限公司 | Switch DC-DC power output overvoltage protection circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109474020A (en) | A kind of photovoltaic module intelligence turning off system and its method | |
| CN104158307B (en) | On-line energy harvesting system for ice melting device of ultra-high voltage four-split conductor transmission line | |
| CN2322299Y (en) | Quick overvoltage protector for constant-current high-voltage direct-current power supply | |
| CN115498582A (en) | System and method for uninterrupted ground wire DC ice melting for UHV transmission lines | |
| CN102957311A (en) | Anti-electromagnetic interference system of megawatt-level wind power converter | |
| CN207426665U (en) | Current transformer and its secondary side protective arrangement for limiting output voltage | |
| CN111313827A (en) | Direct current collection flow box | |
| CN214204949U (en) | Electric wiring structure for high-voltage bus station of transformer substation | |
| CN107453685A (en) | A kind of energy supplying system of power circuit temperature measuring equipment | |
| CN202406194U (en) | Lightning protection camera | |
| CN221427519U (en) | Four-split dry-type transformer for photovoltaic power generation | |
| CN221597064U (en) | Outgoing line arrangement structure of gas turbine generator set of gas power plant | |
| CN203386040U (en) | A power supply time sequence controller | |
| CN2349698Y (en) | Stand-by state energy-saving safety socket for domestic electric appliances | |
| CN208384368U (en) | Large-scale data center generating set dynamic redundancy control system | |
| CN201499115U (en) | Safety switch device for control cabinet of oil pumping machine | |
| CN206148808U (en) | Power electronic transformer's high -pressure rectifier module | |
| CN2266255Y (en) | Electronic transformer for high-reliable energy-saving neon lamp | |
| CN109663669A (en) | A kind of frequency conversion dual-pulse power supply | |
| CN213521269U (en) | Wisdom box-type substation | |
| CN216929872U (en) | Power supply device of non-electric quantity protection system | |
| CN220755106U (en) | Constant current light modulator | |
| CN205265224U (en) | Current foldback circuit | |
| CN219575481U (en) | High-voltage double-isolation switch with T-connection lead terminal on static contact head of shared support | |
| CN204925294U (en) | Be suitable for 10 kilovolts of warning device of trouble for distribution lines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |