CN201075817Y - Series connection high voltage bridge arm having voltage equalizing protection - Google Patents
Series connection high voltage bridge arm having voltage equalizing protection Download PDFInfo
- Publication number
- CN201075817Y CN201075817Y CNU2007201023966U CN200720102396U CN201075817Y CN 201075817 Y CN201075817 Y CN 201075817Y CN U2007201023966 U CNU2007201023966 U CN U2007201023966U CN 200720102396 U CN200720102396 U CN 200720102396U CN 201075817 Y CN201075817 Y CN 201075817Y
- Authority
- CN
- China
- Prior art keywords
- voltage
- parallel
- series
- diode
- bridge arm
- 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
Abstract
A series high voltage bridge arm with pressure equalizing protection belongs to the control technical field and is used for solving the protection problem of the series bridge arm. The utility model adopts the technical proposal that the bridge arm includes a plurality of pressure equalizing protection unit circuits with same circuit structure. Each pressure equalizing protection unit circuit is connected in parallel with an electric switch element of the series bridge arm and consists of a small non inductive resistance, a big non inductive resistance, a non inductive capacitance, a transient voltage restraint diode and a fast diode. The small non inductive resistance and the big non inductive resistance are connected in parallel with the electric switch element after being connected in series. The non inductive capacitance and the transient voltage restraint diode are all connected with the big non inductive resistance in parallel. The fast diode is connected with the small non inductive resistance in parallel. The utility model has the advantages of simple structure, good dynamic and static pressure equalizing effects. The utility model can absorb surge voltage, implement effective and reliable protection on electric switch elements used in series and greatly improve the working reliability of high voltage power electric switch series bridge arm.
Description
Technical field
The utility model relates to a kind ofly can connect that the tandem tap device of brachium pontis is implemented moving static state voltage equipoise, surge absorbs and the circuit of clamping protection, belongs to the control technology field to electronic power switch.
Background technology
High-power electric and electronic switching device (as the IGBT device) is widely used in the power electronic equipments such as chopper, frequency converter, electric machine speed regulation or soft start, electrical network SVC.Because single electronic switching device is withstand voltage limited, when voltage is higher, often several switching device series connection must be used.When the series connection of a plurality of electronic switching devices is used, because the back-emf that each switching device exists fine difference or main circuit stray inductance and inductive load etc. to cause the switching time, often make the individual switches device bear too high voltages and damage.Therefore, must implement sound attitude voltage equalizing protection to the electronic switching device of series connection.At present, sound attitude equalizer circuit generally has the DCR protective circuit, adopts the DCR of pressurizer to improve circuit etc.Energy when the shortcoming of common DCR protective circuit is overvoltage is released slowly, even does not have protective effect sometimes; When adopting the protective circuit of voltage stabilizer of chopped mode,, then exist the high position coupling of each power supply to get the energy problem, and circuit is comparatively complicated because the chopper supply benchmark has nothing in common with each other; If pressurizer adopts voltage-stabiliser tube because voltage-stabiliser tube can only be operated in high-impedance state during normal static state voltage equipoise, and during high resistant the little device of leakage current to bear voltage just bigger, this just may cause the inhomogeneous of static dividing potential drop.
Summary of the invention
The utility model be used to overcome prior art defective, provide a kind of static state voltage equipoise simple in structure, moving effective, can absorb surge voltage, can implement the series connection high-voltage bridge arms that has voltage equalizing protection of reliably protecting to electronic switching device.
The alleged problem of the utility model realizes with following technical proposals:
A kind of series connection high-voltage bridge arms that has voltage equalizing protection; it comprises the voltage equalizing protection element circuit that a plurality of circuit structures are identical; each voltage equalizing protection element circuit is connected in parallel on the electronic switching device of series connection brachium pontis; each voltage equalizing protection element circuit is formed by little noninductive resistance R2, big noninductive resistance R2 and noninductive capacitor C; described little noninductive resistance R1, big noninductive resistance R2 are parallel on the electronic switching device after being connected in series, and noninductive capacitor C is parallel on the big noninductive resistance R2.
The above-mentioned series connection high-voltage bridge arms that has voltage equalizing protection, described voltage equalizing protection element circuit are set up a transient voltage and are suppressed diode DZ, and transient voltage suppresses diode DZ and is parallel on the big noninductive resistance R2.
The above-mentioned series connection high-voltage bridge arms that has voltage equalizing protection, described voltage equalizing protection element circuit is set up a fast diode D, and fast diode D is parallel on the little noninductive resistance R1.
The utility model adopts passive no sensing unit to form, during work, (resistance R 2 resistances are much larger than resistance R 1 to constitute bleeder circuit by the little noninductive resistance R1 in n the element circuit, big noninductive resistance R2 series connection, the dividing potential drop effect depends primarily on resistance R 2), the quiescent voltage value that is added in every electronic power switch two ends is equated, realize static state voltage equipoise.Dynamic voltage balancing by the fast diode D in n the element circuit with after little noninductive resistance R1 is in parallel and noninductive capacitor C be in series and form equivalent RC circuit and realize.Can not suddenly change owing to be the voltage at the noninductive capacitor C two ends of relation in parallel with every electronic power switch, every electronic power switch both end voltage can not be suddenlyd change at shutdown moment, thereby realize dynamic voltage balancing.When certain electronic power switch two ends surge voltage occurs for a certain reason, at first absorb surge voltage by noninductive capacitor C, when the voltage on the capacitor C reaches the puncture voltage of transient state diode DZ, transient state diode DZ becomes low resistive state suddenly by high impedance, excess energy on the capacitor C is released rapidly, guaranteed the safety of power device.Simple in structure, the moving static state voltage equipoise of the utility model is effective, can absorb surge voltage, can implement effective, reliable protection to the electronic switching device that series connection is used, and has improved the reliability of high-tension electricity electronic switch series connection brachium pontis work greatly.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is an electrical schematic diagram of the present utility model.
Each label is among the figure: EP1～EPn, voltage equalizing protection element circuit, and the IGBT of IGBT1～IGBTn, band inverse parallel diode, DZ, transient voltage suppress diode, D, fast diode, C, noninductive electric capacity, R1, little noninductive resistance, R2, big noninductive resistance.
Embodiment
Referring to Fig. 1; the quantity of the electronic power switch of the number n of voltage equalizing protection element circuit EP1～EPn and high-voltage bridge arms series connection is corresponding, and the quantity of the electronic power switch of series connection is decided by the maximum working voltage that the series connection rated direct voltage that high-voltage bridge arms connect and every electronic power switch should bear.
Characteristics of the present utility model are; series connection brachium pontis sound attitude voltage equalizing protection circuit adopts passive no sensing unit to form; circuit structure is simple; save the high position of voltage stabilizer of chopped mode in each protective circuit and got the energy power circuit; dynamically, static state voltage equipoise is functional; response speed is fast, and transient surge voltage suppresses response speed less than 1 * 10
-12S can improve the reliability of high-tension electricity electronic switch series connection brachium pontis work greatly.Be applicable to the sound attitude voltage equalizing protection of the electronic power switch series connection brachium pontis in various high pressure choppers, high voltage converter, high-voltage motor speed governing or the various electrical control equipments such as soft start, high-voltage fence SVC.
Each voltage equalizing protection element circuit structure of the utility model is identical, suppresses diode DZ and two noninductive resistance R1, R2 compositions by a fast diode D, noninductive capacitor C, transient voltage.The concrete connection is: little noninductive resistance R1, big noninductive resistance R2 are parallel to (position of resistance R 1, resistance R 2 is interchangeable) on the electronic power switch device after being connected in series, fast diode D and little noninductive resistance R1 are in parallel, and the positive pole of D connects the higher end of noninductive resistance R1 DC potential; Capacitor C, transient state diode DZ are connected in parallel with big noninductive resistance R2, and the positive pole of DZ connects the lower end of noninductive resistance R2 DC potential.During concrete enforcement, can earlier each a voltage equalizing protection element circuit and an electronic power switch be carried out the tight one by one assembly of noninductive formation in parallel, again each tight assembly is connected in series, form a complete series connection brachium pontis and sound attitude voltage equalizing protection circuit thereof.
During work; realize static state voltage equipoise by the resistance R 1 among n voltage equalizing protection element circuit EP1～EPn, series connection dividing potential drop (pressure drop is mainly born by R2) circuit that R2 forms; the quiescent voltage value that is added in every electronic power switch (present embodiment is every IGBT among IGBT1～IGBTn) two ends is equated, its value is n/one of series connection rated direct voltage that high-voltage bridge arms connects.Dynamic voltage balancing is composed in series equivalent RC series circuit with noninductive capacitor C again and realizes by the fast diode D among n protective circuit EP1～EPn and resistance R 1 are in parallel; at this moment each equivalent RC circuit is relation in parallel with every electronic power switch (present embodiment is every IGBT); because capacitance voltage can not suddenly change, thereby realize the dynamic voltage balancing of every electronic power switch (present embodiment is every IGBT) both end voltage in the switching process.When certain electronic power switch (present embodiment is certain IGBT) two ends occur surpassing the electrical surge high voltage of static state voltage equipoise for a certain reason, at first absorb surge voltage by noninductive capacitor C, when the voltage on the capacitor C reaches the puncture voltage of transient state diode DZ, transient state diode DZ becomes low resistive state suddenly by high impedance, electric current passes through rapidly, and the response time is less than 1 * 10
-12S, thus the excess energy on the capacitor C is released rapidly by the DZ pipe, make the electronic power switch two ends get the puncture voltage that voltage is no more than DZ, guaranteed the safety of power device.
Transient voltage suppresses the selection principle of diode DZ and is in concrete the enforcement: the rated working reverse voltage of (1) DZ (for the DZ puncture voltage 85%) should be more than or equal to protected electronic power switch maximum working voltage (present embodiment be n/one of series connection maximum rated direct voltage that brachium pontis connects); (2) the maximum clamping voltage of DZ should be less than protected electronic power switch maximum permissible voltage; (3) the peak-peak absorbed power of the DZ maximum electrical surge power that must may occur greater than protected electronic power switch, the average steady state power that perhaps makes DZ is greater than peak absorbance power and the protected electronic power switch electrical surge pulse duration paired pulses product of ratio at interval; When (4) the DZ pipe does not have suitable voltage, allow several transient voltages to suppress the diode series connection and use, at this moment peak absorbance power can be born respectively by the transient state diode of several series connection.
The selection principle of resistance R 1, R2 resistance in concrete the enforcement should guarantee the stability of static state voltage equipoise to guarantee that again the loss of static state voltage equipoise is as far as possible little; The R2 resistance is much larger than the R1 resistance, the main effect of R1 is for energy stored on the capacitor C of releasing, to improve capacitor C in the absorbability of electronic power switch (present embodiment is IGBT) at shutdown moment, the loss that the selection of R1 resistance is opened moment with not obvious increase electronic power switch is advisable.
Claims (3)
1. series connection high-voltage bridge arms that has voltage equalizing protection; it is characterized in that; it comprises the voltage equalizing protection element circuit that a plurality of circuit structures are identical; each voltage equalizing protection element circuit is connected in parallel on the electronic power switch device of series connection brachium pontis; each voltage equalizing protection element circuit is formed by little noninductive resistance (R1), big noninductive resistance (R2) and noninductive electric capacity (C); described little noninductive resistance (R1), big noninductive resistance (R2) are parallel on the electronic switching device after being connected in series, and noninductive electric capacity (C) is parallel on the big noninductive resistance (R2).
2. according to the described series connection high-voltage bridge arms that has voltage equalizing protection of claim 1, it is characterized in that described voltage equalizing protection element circuit is set up a transient voltage and suppressed diode (DZ), transient voltage suppresses diode (DZ) and is parallel on the big noninductive resistance (R2).
3. according to claim 1 or the 2 described series connection high-voltage bridge arms that have voltage equalizing protection, it is characterized in that described voltage equalizing protection element circuit is set up a fast diode (D), fast diode (D) is parallel on the little noninductive resistance (R1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201023966U CN201075817Y (en) | 2007-08-31 | 2007-08-31 | Series connection high voltage bridge arm having voltage equalizing protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201023966U CN201075817Y (en) | 2007-08-31 | 2007-08-31 | Series connection high voltage bridge arm having voltage equalizing protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201075817Y true CN201075817Y (en) | 2008-06-18 |
Family
ID=39521074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201023966U Expired - Fee Related CN201075817Y (en) | 2007-08-31 | 2007-08-31 | Series connection high voltage bridge arm having voltage equalizing protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201075817Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834517A (en) * | 2010-05-05 | 2010-09-15 | 汪槱生 | Method for realizing multitube series voltage sharing through single-capacitor clamping and transformer feedback energy |
| CN101860214A (en) * | 2010-05-05 | 2010-10-13 | 汪隽迈 | Method for realizing passive voltage equalizing during serial connection of multiple high-frequency power electronic devices |
| CN102882390A (en) * | 2012-09-28 | 2013-01-16 | 陆东海 | Rectifying circuit |
| CN103683260A (en) * | 2013-12-19 | 2014-03-26 | 天津正本自控系统有限公司 | IGBT (Insulated Gate Bipolar Transistor) series connection voltage equalizing circuit |
| CN106558865A (en) * | 2015-09-25 | 2017-04-05 | 全球能源互联网研究院 | A kind of modified cascade full-bridge high voltage DC breaker and its quick coincidence method |
| CN106953581A (en) * | 2017-04-13 | 2017-07-14 | 成都高新区华汇实业有限公司 | Arrangements for speed regulation for blower for vehicle air conditioning |
| CN109755318A (en) * | 2017-11-07 | 2019-05-14 | 株式会社东芝 | Semiconductor devices, power-converting device, driving device, vehicle and elevator |
| CN110417285A (en) * | 2019-06-30 | 2019-11-05 | 武汉东城新能源有限公司 | A kind of novel high-frequency high voltage silicon rectifier stack circuit |
-
2007
- 2007-08-31 CN CNU2007201023966U patent/CN201075817Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834517A (en) * | 2010-05-05 | 2010-09-15 | 汪槱生 | Method for realizing multitube series voltage sharing through single-capacitor clamping and transformer feedback energy |
| CN101860214A (en) * | 2010-05-05 | 2010-10-13 | 汪隽迈 | Method for realizing passive voltage equalizing during serial connection of multiple high-frequency power electronic devices |
| CN101860214B (en) * | 2010-05-05 | 2013-01-16 | 汪隽迈 | Method for realizing passive voltage equalizing during serial connection of multiple high-frequency power electronic devices |
| CN102882390A (en) * | 2012-09-28 | 2013-01-16 | 陆东海 | Rectifying circuit |
| CN103683260A (en) * | 2013-12-19 | 2014-03-26 | 天津正本自控系统有限公司 | IGBT (Insulated Gate Bipolar Transistor) series connection voltage equalizing circuit |
| CN106558865A (en) * | 2015-09-25 | 2017-04-05 | 全球能源互联网研究院 | A kind of modified cascade full-bridge high voltage DC breaker and its quick coincidence method |
| CN106558865B (en) * | 2015-09-25 | 2019-03-15 | 全球能源互联网研究院 | A kind of modified cascade full-bridge high voltage DC breaker and its quick coincidence method |
| CN106953581A (en) * | 2017-04-13 | 2017-07-14 | 成都高新区华汇实业有限公司 | Arrangements for speed regulation for blower for vehicle air conditioning |
| CN109755318A (en) * | 2017-11-07 | 2019-05-14 | 株式会社东芝 | Semiconductor devices, power-converting device, driving device, vehicle and elevator |
| CN110417285A (en) * | 2019-06-30 | 2019-11-05 | 武汉东城新能源有限公司 | A kind of novel high-frequency high voltage silicon rectifier stack circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201075817Y (en) | Series connection high voltage bridge arm having voltage equalizing protection | |
| CN202549831U (en) | An electrostatic discharge protector and a system composed thereof | |
| CN103795045B (en) | Protection device | |
| CN102035188B (en) | Novel thyristor overvoltage protection method | |
| CN105552827A (en) | Impressed current transfer circuit and current transfer method thereof | |
| CN103986122A (en) | Modularized current-limiting circuit breaker power module with additional diodes | |
| CN100424959C (en) | Breakdown diode triggering thyristor valve over-voltage protector | |
| CN102158060A (en) | Novel direct-current converter valve thyristor damping loop | |
| CN109600032B (en) | Buffer absorption circuit for solid-state switch | |
| US11336274B2 (en) | Clamp circuit and power module using the same | |
| CN103050959A (en) | Surge protection circuit for signal circuit | |
| CN103647263A (en) | DC circuit breaker based on half-control electric-power electronic devices | |
| CN106253652B (en) | A kind of over-pressure safety device of inverter | |
| CN210724199U (en) | Direct current dual input power surge suppression circuit | |
| CN202111614U (en) | Trigger circuit used for thyristor and fast bypass apparatus | |
| CN202206137U (en) | Lightning-proof protection circuit of telecommunication terminal equipment | |
| CN204578080U (en) | A kind of surge protection circuit | |
| JP5192002B2 (en) | Surge energy conversion circuit | |
| CN203932994U (en) | A kind of low-voltage dc power supply port surge protection circuit | |
| CN111064172A (en) | Protection circuit and variable pitch system | |
| CN201001033Y (en) | Overvoltage protector | |
| CN107592103A (en) | A kind of Microsecond grade electronic switching device | |
| CN102780203A (en) | Overvoltage and under-voltage protection circuit | |
| CN208445535U (en) | A kind of the controllable arrester thyristor valve switch and controllable arrester of inhibition response Lightning Over-voltage | |
| WO2003015277A1 (en) | A series power switch bridge having the ability of automatic voltage-sharing |
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: BAODING SIFANG SANYI ELECTRIC CO., LTD. Free format text: FORMER NAME: BAODING SANYI POWER ELECTRONIC CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 071051 No. 1968 Xiangyang North Street, Hebei, Baoding Patentee after: BAODING SIFANGSANYI ELECTRIC CO., LTD. Address before: 071051 No. 1968 Xiangyang North Street, Hebei, Baoding Patentee before: Baoding Sanyi Power Electronic Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080618 Termination date: 20150831 |
|
| EXPY | Termination of patent right or utility model |