CN1405958A - Series power-switch arm capable of automatically equalizing voltage - Google Patents
Series power-switch arm capable of automatically equalizing voltage Download PDFInfo
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- CN1405958A CN1405958A CN 01108712 CN01108712A CN1405958A CN 1405958 A CN1405958 A CN 1405958A CN 01108712 CN01108712 CN 01108712 CN 01108712 A CN01108712 A CN 01108712A CN 1405958 A CN1405958 A CN 1405958A
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- circuit
- drwc
- power switch
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Abstract
The device comprises the power switch bridge and the dynamic/static state voltage sharing absorption unit circuit (DRwC) bridge. The power switch bridge comprises several power switches connected in serial. The number of the DRwC bridge is related to the number of the power switch bridge. The positive and negative ends of each DRwC circuit are connected to the positive and negative ends of the relevant power switch. The DRwC circuit is composed of one diode D, one capacitor C and one regulator Rw. The regulator Rw connected to the capacitor C in parallel are connected to diode D in serial. The cascaded DRwC circuit carries out the process of dynamic/static state voltage sharing and absorbing the back purge voltage for the cascaded power switch so as to raise the performances and the precision of voltage regulation.
Description
(1). technical field:
What the present invention relates to is power-switch arm in the RHVC in the power electronics industry.
(2). background technology:
Electronic power switch is widely used in the power electronics industry because of its good electrical control characteristic, as the IGBT bridge in chopper, and the IGBT brachium pontis in each height, the medium voltage frequency converter.Because the withstand voltage of electronic power switch is lower, in high-tension circuit, if adopt several power switch tandem workings, because the inconsistency of the open and close time of each power switch, and the overvoltage that causes because of di/dt of loop inductance, it is too high and damage that power switch of opening after can being directed at when opening and the power switch that turn-offs earlier when turn-offing bear voltage, makes the series connection of power switch use the difficult point that becomes exploitation.Therefore one of mode that generally adopts at present in high-tension circuit is by multistage phase shift main transformer, and IGBT hands over orthogonal unit bridges tandem plan, i.e. " H " bridge unit overlaying scheme.(" electric drive " 2000 2 phases of publishing referring to periodical publisher of Tianjin electric drive research institute P.3-6).The shortcoming of these schemes is complex structures, makes difficulty, and cost and failure rate are all very high.
(3). summary of the invention:
The objective of the invention is to overcome the above-mentioned shortcoming of prior art, provide a kind of utilize low withstand voltage electronic power switch directly to connect and use constitute series power-switch arm with static state voltage equipoise, dynamic voltage balancing, Kickback voltage absorption function.
The series power-switch arm of realizing the object of the invention is made of a power switch bridge and moving static state voltage equipoise absorptive unit circuit (DRwC) bridge, described power switch bridge is connected in series by several power switchs and constitutes, the number of the DRwC circuit of moving static state voltage equipoise absorptive unit circuit bridge is corresponding with the number of power switch, each DRwC circuit just, negative terminal respectively with pairing power switch just, negative terminal joins, described DRwC circuit is by a diode D, a capacitor C and a pressurizer Rw form, wherein, diode D be the pressurizer Rw that is connected in parallel, capacitor C is connected in series mutually.
Operation principle of the present invention is as follows:
When electronic power switch is not worked, the power switch of connecting is carried out static state voltage equipoise by the pressurizer Rw in the DRwC circuit.Or overvoltage that loop inductance because of di/dt cause inconsistent when electronic power switch is opened or turn-off because of the open and close time, at first absorb by the charging of the capacitor C in the DRwC circuit, because capacitor C is recharged, therefore both end voltage can raise, Rw detects the rising of this voltage, bleeds off the energy that newly fills immediately, and the voltage of keeping the capacitor C two ends is not higher than a certain set point, this set point is far below the rated value of power switch, thereby makes the voltage at power switch two ends be no more than its rated value.The problem that the inconsistent overvoltage that may cause of the open and close time because of each power switch when having solved the electronic power switch series connection burns out.
Consider when when failure of removal appears in DRwC circuit power switch two ends can occur big surge current occurring in instant high-voltage or the circuit or can make the charging voltage of capacitor C surpass institute's specified value and cause damaging this situation of power switch during short circuit; still can set up a protective circuit of being made up of a state detection circuit T and several surge absorbers that are connected to each DRwC circuit two ends, described state detection circuit is by comparator A, diode D
L, D
HAnd resistance R
3, R
4, R
5, R
6Form, wherein, D
LAnode and resistance R
5, R
61 pin of a termination comparator A, D
LNegative electrode connecting resistance R
4An end, resistance R
5Another terminating diode D
HAnode and resistance R
3An end, resistance R
6The negative pole end of another termination power switch cascaded bridges, the high level test side of described state detection circuit and the positive terminal of first DRwC circuit join, the low level test side of state detection circuit and the negative pole end of last DRwC circuit join.When the charging voltage that above-mentioned capacitor C takes place surpasses this situation of a certain set-point, the surge absorber that is connected to each DRwC circuit two ends (also being the two ends of power switch) discharged this overvoltage in the extremely short time, thereby can guarantee that this power switch avoids the over-voltage breakdown under the abnormal conditions.When the control loop that surpasses certain hour or a certain electronic power switch when the electric current that passes through in the surge absorber lost efficacy and causes this switch not worked, state detection circuit detects this state, output signal to the control circuit processing immediately fast, thereby can further guarantee the trouble free service of tandem electronic power switch brachium pontis.
Described power switch bridge can be made up of various electronic power switchs such as IGRT, IEGT, IGCT, GCT, GTO.The direct-type high-voltage bridge arms of connecting that IGBT constituted that joins by capacitive motherboard and several and capacitive motherboard that can select also that my patent (ZL00223733.4) discloses for use.Because the capacitive motherboard does not produce line inductance, be capacitive behavior, can absorb the Kickback voltage that causes because of inductive load effectively, and fine to the absorption filter effect of high-frequency harmonic, alleviate the pressure of dc filter capacitor on the bus, thereby can further guarantee the reliability that the IGBT series connection is used.
The advantage of this series power-switch arm is by the DRwC circuit of connecting the power switch of connecting to be carried out static voltage stabilizing, dynamic voltage balancing, pincers pressure, Kickback voltage absorption processing.Simple in structure, parts are few, can improve the functional reliability of power switch cascaded bridges greatly.Pressurizer in the DRwC circuit greatly improves the precision of voltage regulation of power switch series connection brachium pontis.Problem is used in the series connection that has solved power switch well.Can be used in the various electrical control equipments such as frequency conversion, inversion, chopper, direct current transportation, reactive-load compensator.
Below in conjunction with drawings and Examples the present invention is described in further details.But content of the present invention is not limited in present embodiment.
(4). description of drawings:
Fig. 1 structural representation of the present invention
The circuit structure diagram of Fig. 2 present embodiment
Fig. 3 voltage stabilizer of chopped mode circuit diagram
The another kind of IGBT cascaded bridges of Fig. 4 structural representation
The equivalent circuit diagram of Fig. 5 Fig. 4
The another kind of DRwC equivalent circuit diagram of Fig. 6
Fig. 7 is used for the state-detection of two IGBT series connection and simplifies circuit
(5). embodiment:
Referring to Fig. 1～Fig. 3, this series power-switch arm is made of a power switch bridge 2 and moving static state voltage equipoise absorptive unit circuit (DRwC) bridge 3, is installed in the housing 1.Described power switch bridge 2 is in the present embodiment by several power switchs IGBT
1, IGBT
2IGBT
NThe formation that is connected in series, the number of the DRwC circuit of moving static state voltage equipoise absorptive unit circuit bridge is corresponding with the number of power switch, and the positive and negative end of each DRwC circuit joins with the positive and negative end of pairing power switch respectively; Described DRwC circuit is made up of a diode D, a capacitor C and a pressurizer Rw, wherein, diode D be the pressurizer Rw, the capacitor C that are connected in parallel and be connected in series mutually.Manufacture Shi Kexian and constitute a modular unit, more some such modular unit serial connections are made this series power-switch arm by a DRwC circuit and a power switch butt joint.As a same reason, this modular unit also can be made of two DRwC circuit and two power switch butt joints, three like this, four or the like.The benefit of doing like this is to be convenient for changing the single device of damage.
Described pressurizer Rw can be high withstand voltage voltage-stabiliser tube, also can be voltage stabilizer of chopped mode.Fig. 3 has provided the circuit structure diagram of voltage stabilizer of chopped mode, by power device metal-oxide-semiconductor M, comparator B, divider resistance R
7, R
8And energy consumption resistance Rx composition, be a typical chopped mode voltage stabilizing circuit.When the capacitor C both end voltage in the DRwC circuit surpasses set point when Vb (Va＞), voltage is with than device B upset, and power device M is open-minded, and energy is consumed on resistance R x, makes the capacitor C both end voltage remain on below the set point.Its effect is equivalent to an automated variable resistance.When static, its equivalent resistance R=R
7+ R
8, when overvoltage is dynamic, R=Rx, and Rx＜＜R
7+ R
8, shortened the discharge time of capacitor C greatly, thereby the precision of voltage regulation improved.
For guaranteeing to make the charging voltage of the capacitor C in the DRwC circuit be no more than institute's specified value; can set up a protective circuit 4 of forming by a state detection circuit T and several surge absorber LY that are connected to each DRwC circuit two ends; referring to Fig. 2, described state detection circuit is by comparator A, diode D
L, D
HAnd resistance R
3, R
4, R
5, R
6Form, wherein, D
LAnode and resistance R
5, R
61 pin of a termination comparator A, D
LNegative electrode connecting resistance R
4An end, resistance R
5Another terminating diode D
HAnode and resistance R
3An end, resistance R
6The negative pole end of another termination power switch cascaded bridges, the high level test side of described state detection circuit and the positive terminal of first DRwC circuit join, the low level test side of state detection circuit and the negative pole end of last DRwC circuit join.When the charging voltage of capacitor C surpasses a certain set-point, the surge absorber LY that is connected to each DRwC circuit two ends (also being the two ends of IGBT) discharged this overvoltage in the extremely short time, thereby can guarantee that this power switch avoids the over-voltage breakdown under the abnormal conditions.When the control loop that surpasses certain hour or a certain electronic power switch when the electric current that passes through among the surge absorber LY lost efficacy and causes this switch not worked, state detection circuit detects this state, output signal to the control circuit processing immediately fast, thereby can further guarantee the trouble free service of this tandem electronic power switch brachium pontis.
Except that IGBT, also can be composed in series described power switch bridge by various electronic power switchs such as IGRT, IEGT, IGCT, GCT, GTO.The direct-type high-voltage bridge arms of connecting that IGBT constituted that joins by capacitive motherboard 5 and several and capacitive motherboard that can select also that my patent (ZL00223733.4) discloses for use.Referring to Fig. 4.Fig. 5 is the equivalent circuit diagram of Fig. 4.Because the capacitive motherboard does not produce line inductance, be capacitive behavior, can absorb the Kickback voltage that causes because of inductive load effectively, and fine to the absorption filter effect of high-frequency harmonic, alleviate the pressure of dc filter capacitor on the bus, thereby can further guarantee the reliability that the IGBT series connection is used.
Fig. 6 has provided the DRwC equivalent electric circuit of another kind of type of attachment, joins as the input anode by an end of capacitor C and the end of pressurizer Rw, and the end of another termination pressurizer Rw of capacitor C and the anode of diode D, the negative electrode of diode D is as the output negative terminal.
Fig. 7 is that the state-detection that only is used for the cascaded bridges that is made of two IGBT is simplified the circuit special case.This circuit is to the simplification of the part of the state detection circuit among Fig. 3, has omitted resistance R
3, with D
LPolarity and Fig. 3 in opposite, its operation principle and Fig. 3 are basic identical.Promptly as drive signal V
1For just and the terminal voltage of the DRwC circuit of two series connection when being high level, then 3 pin output protection signals of comparator; When drive signal is low level for terminal voltages negative or the two DRwC circuit of connecting, comparator 3 pin output low levels.
Claims (4)
1. the series power-switch arm of an energy automatically equalizing voltage, it is characterized in that described series power-switch arm is made of a power switch bridge and moving static state voltage equipoise absorptive unit circuit (DRwC) bridge, described power switch bridge is connected in series by several power switchs and constitutes, the number of the DRwC circuit of moving static state voltage equipoise absorptive unit circuit bridge is corresponding with the number of power switch, each DRwC circuit just, negative terminal respectively with pairing power switch just, negative terminal joins, described DRwC circuit is by a diode D, a capacitor C and a pressurizer Rw form, wherein, diode D be the pressurizer Rw that is connected in parallel, capacitor C is connected in series mutually.
2. the series power-switch arm of energy automatically equalizing voltage as claimed in claim 1 is characterized in that described pressurizer is a voltage stabilizer of chopped mode.
3. the series power-switch arm of energy automatically equalizing voltage as claimed in claim 1; it is characterized in that described series power-switch arm also is provided with a protective circuit of being made up of a state detection circuit T and several surge absorber LY that are connected to each DRwC circuit two ends, described state detection circuit is by comparator A, diode D
L, D
HAnd resistance R
3, R
4, R
5, R
6Form, wherein, D
LAnode and resistance R
5, R
61 pin of a termination comparator A, D
LNegative electrode connecting resistance R
4An end, resistance R
5Another terminating diode D
HAnode and resistance R
3An end, resistance R
6The negative pole end of another termination power switch cascaded bridges, the high level test side of described state detection circuit and the positive terminal of first DRwC circuit join, the low level test side of state detection circuit and the negative pole end of last DRwC circuit join.
4. series power-switch arm that can automatically equalizing voltage as claimed in claim 1 is characterized in that described series power-switch bridge is made of the IGBT that capacitive motherboard and several and capacitive motherboard join.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01108712 CN1405958A (en) | 2001-08-09 | 2001-08-09 | Series power-switch arm capable of automatically equalizing voltage |
| EP02742650A EP1427106A4 (en) | 2001-08-09 | 2002-06-06 | A series power switch bridge having the ability of automatic voltage-sharing |
| PCT/CN2002/000398 WO2003015277A1 (en) | 2001-08-09 | 2002-06-06 | A series power switch bridge having the ability of automatic voltage-sharing |
| EA200400285A EA005457B1 (en) | 2001-08-09 | 2002-06-06 | A series power switch bridge having the ability of automatic voltage-sharing |
| JP2003520082A JP2004537942A (en) | 2001-08-09 | 2002-06-06 | Series power switch bridge with automatic voltage distribution |
| US10/486,439 US7054174B2 (en) | 2001-08-09 | 2002-06-06 | Series power switch bridge having the ability of automatic voltage-sharing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01108712 CN1405958A (en) | 2001-08-09 | 2001-08-09 | Series power-switch arm capable of automatically equalizing voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1405958A true CN1405958A (en) | 2003-03-26 |
Family
ID=4657507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01108712 Pending CN1405958A (en) | 2001-08-09 | 2001-08-09 | Series power-switch arm capable of automatically equalizing voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1405958A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102781130A (en) * | 2012-07-30 | 2012-11-14 | 东莞市精诚电能设备有限公司 | Large-power electromagnetic cooker circuit based on power electronic technology |
| EP2533411A1 (en) * | 2010-02-05 | 2012-12-12 | Shenzhen Clou Inverter Co., Ltd | Voltage limitation circuit for power switch devices connected in series |
| CN102857136A (en) * | 2012-10-10 | 2013-01-02 | 范家闩 | Converter for converting high-voltage direct current into alternating current |
| CN103326550A (en) * | 2013-06-28 | 2013-09-25 | 王达开 | Power switching device series circuit capable of achieving automatic voltage limiting |
| CN103457449A (en) * | 2013-08-07 | 2013-12-18 | 王成效 | Power switch device series circuit with overvoltage protection function |
| WO2014206244A1 (en) * | 2013-06-28 | 2014-12-31 | Wang Dakai | High voltage circuit with automatic voltage limiting power switch device serially connected therein |
| CN105006958A (en) * | 2015-07-20 | 2015-10-28 | 绍兴合田新能源有限公司 | Grid electrode protection circuit for field effect transistors connected in series |
| CN105305816A (en) * | 2015-11-09 | 2016-02-03 | 飞毛腿(福建)电子有限公司 | Method for realizing circuit control by adopting series connection of field-effect tubes |
-
2001
- 2001-08-09 CN CN 01108712 patent/CN1405958A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2533411A1 (en) * | 2010-02-05 | 2012-12-12 | Shenzhen Clou Inverter Co., Ltd | Voltage limitation circuit for power switch devices connected in series |
| EP2533411A4 (en) * | 2010-02-05 | 2014-09-03 | Shenzhen Clou Inverter Co Ltd | Voltage limitation circuit for power switch devices connected in series |
| 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 |
| CN102781130A (en) * | 2012-07-30 | 2012-11-14 | 东莞市精诚电能设备有限公司 | Large-power electromagnetic cooker circuit based on power electronic technology |
| CN102857136A (en) * | 2012-10-10 | 2013-01-02 | 范家闩 | Converter for converting high-voltage direct current into alternating current |
| CN103326550A (en) * | 2013-06-28 | 2013-09-25 | 王达开 | Power switching device series circuit capable of achieving automatic voltage limiting |
| WO2014206244A1 (en) * | 2013-06-28 | 2014-12-31 | Wang Dakai | High voltage circuit with automatic voltage limiting power switch device serially connected therein |
| CN103457449A (en) * | 2013-08-07 | 2013-12-18 | 王成效 | Power switch device series circuit with overvoltage protection function |
| CN103457449B (en) * | 2013-08-07 | 2016-08-10 | 王成效 | A kind of series circuit of power switch device with over-voltage protecting function |
| CN105006958A (en) * | 2015-07-20 | 2015-10-28 | 绍兴合田新能源有限公司 | Grid electrode protection circuit for field effect transistors connected in series |
| CN105305816A (en) * | 2015-11-09 | 2016-02-03 | 飞毛腿(福建)电子有限公司 | Method for realizing circuit control by adopting series connection of field-effect tubes |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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