CN105846658B - A kind of IGBT parallel connections Current for paralleled circuit - Google Patents
A kind of IGBT parallel connections Current for paralleled circuit Download PDFInfo
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- CN105846658B CN105846658B CN201610171989.1A CN201610171989A CN105846658B CN 105846658 B CN105846658 B CN 105846658B CN 201610171989 A CN201610171989 A CN 201610171989A CN 105846658 B CN105846658 B CN 105846658B
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- igbt
- operational amplifier
- control circuit
- circuit
- resistance
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
- H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
- Power Conversion In General (AREA)
Abstract
The present invention provides a kind of IGBT parallel connections Current for paralleled circuit, can realize Current for paralleled, and the accurate and reliable stream that carries out is adjusted, and switching frequency is stablized, and service life length is particularly suitable for the power electronic equipment for needing IGBT used in parallel and being connected for a long time.It includes global control circuit, two IGBT at least in parallel, and the local feedback control circuit being arranged in a one-to-one correspondence respectively with IGBT；The input terminal of the corresponding local feedback control circuit of emitter connection of IGBT, the output end of the corresponding local feedback control circuit of grid connection；Local feedback control circuit is connect with global control circuit respectively；The reference signal that the local feedback control circuit is used to be sent out according to collected feedback signal and global drive delays time to control module adjusts the amplitude size to the corresponding IGBT drive signals sent；The global control circuit is used for according to each IGBT Current calculations local feedback control circuit reference signal.
Description
Technical field
The present invention relates to power electronics field, specially a kind of IGBT parallel connections Current for paralleled circuit.
Background technology
Insulated gate bipolar transistor (IGBT) is due to combining Power MOSFET (MOSFET) and power transistor
Advantage has the advantages that input impedance is high, and driving power is small, and switching characteristic is good, is a kind of ideal wholly-controled device, in electric power
It is widely used in electronic equipment.But for the power electronic equipment of high-power, the electric current etc. of single IGBT
Grade cannot be satisfied the requirement of equipment, this makes more IGBT being together in parallel becomes an effective choosing as a basic unit
It selects.
IGBT parallel connections application in, each IGBT inherent parameters it is inconsistent, the equivalent electricity of each parallel IGBT branch may be caused
That hinders is inconsistent, to which the quiescent current of each paralleling switch pipe will be caused unbalanced.Part IGBT long-term works are in high current
Under, excessive accumulated heat is will produce, device failure is eventually led to, and the damage of partial switch pipe will further result in rest switch pipe
Whole damage.Therefore, the static uneven flow problem of the parallel connection application urgent need to resolve of IGBT.
Invention content
For problems of the prior art, the present invention provides a kind of IGBT parallel connections Current for paralleled circuit, can realize
Current for paralleled, the accurate and reliable stream that carries out are adjusted, and switching frequency is stablized, and service life length is particularly suitable for that IGBT parallel connections is needed to make
With and the power electronic equipment that is connected for a long time.
The present invention is to be achieved through the following technical solutions：
A kind of IGBT parallel connections Current for paralleled circuit, including global control circuit, two IGBT at least in parallel, and respectively
The local feedback control circuit being arranged in a one-to-one correspondence with IGBT；The emitter connection of IGBT corresponds to the defeated of local feedback control circuit
Enter end, the output end of the corresponding local feedback control circuit of grid connection；Local feedback control circuit respectively with global control circuit
Connection；The local feedback control circuit is used to be sent out according to collected feedback signal and global drive delays time to control module
The reference signal gone out adjusts the amplitude size to the corresponding IGBT drive signals sent；The global control circuit is used for root
According to each IGBT Current calculations local feedback control circuit reference signal.
Preferably, the local feedback control circuit includes the integral electricity after being connected to corresponding IGBT emitter-base bandgap gradings inductance in turn
Road, amplifying circuit, feedback and reference signal comparison circuit, adjuster and main driving circuit；The output end of main driving circuit connects
Connect the grid of corresponding IGBT.
Further, the integrating circuit includes the first operational amplifier, is connected to the first operational amplifier negative input end
Input resistance R, the capacitor C for being connected across the first operational amplifier negative input end and output end and the first operational amplifier of connection
The resistance R of positive input terminal and reference potential0。
Further, the amplifying circuit includes second operational amplifier, is connected to second operational amplifier negative input end
Input resistance R1, be connected across the resistance R of second operational amplifier negative input end and output end2And connection second operational amplifier
The resistance R of positive input terminal and reference potential10。
Further, the feedback and reference signal comparison circuit include third operational amplifier, with collected feedback letter
Number connected resistance RIAnd the resistance R being connected with reference signalR, the other end of two resistance is just defeated with third operational amplifier
Enter end to be connected；The adjuster includes third operational amplifier, is connected with third operational amplifier negative input end, the other end is even joined
Examine the resistance R of current potentialc1And one end connects third operational amplifier negative input end, the other end connects third operational amplifier output terminal
Series connection RC branches.
Further, the main driving circuit includes that several groups are recommended by what triode or MOS power semiconductors formed
Amplifying circuit and resistance connect resistance after several groups push-pull amplifier circuit parallel connection.
Preferably, global control circuit includes reference signal amplifying circuit and reference signal counting circuit.
Further, reference signal amplifying circuit includes four-operational amplifier, is connected to four-operational amplifier negative input
The input resistance R at endref2And it is connected across the resistance R of four-operational amplifier negative input end and output endref1。
Further, the reference signal counting circuit includes four-operational amplifier and one-to-one with IGBT respectively
Input resistance Ri, input resistance RiOne end connects with integrating circuit input terminal in the feedback control circuit of the corresponding locals IGBT, the other end
Connect with four-operational amplifier positive input terminal.
Compared with prior art, the present invention has technique effect beneficial below：
1, a kind of IGBT parallel connections Current for paralleled circuit provided by the invention, with the two-stage of global control and local feedback control
Control is core, and the current average of each IGBT branches can be obtained by reference to signal calculation circuit, as with reference to value input
Local feedback control circuit achievees the purpose that the uneven stream of the static state for adjusting parallel IGBT.This circuit full-automatic fortune after the completion of building
Row, without human intervention, eliminates human cost.Local feedback control circuit uses closed loop feedback control, improves stream and adjusts
The accuracy and reliability of section.
2, IGBT parallel current-equalizing circuits provided by the invention are not necessarily to the addition of buffer circuit, because without reducing opening for IGBT
Close frequency.
3, IGBT parallel current-equalizing circuits provided by the invention can reduce IGBT because long-term work causes under larger current
Accumulated heat, extend the service life of switching tube, reduce damage, good economy performance.
4, IGBT parallel current-equalizing circuits provided by the invention are realized by printing pcb board, are advantageously implemented mass production.
Description of the drawings
Fig. 1 is the structural schematic diagram of the IGBT parallel connection Current for paralleled circuits described in present example.
Fig. 2 is the schematic diagram of the local feedback control circuit described in present example.
Fig. 3 is the schematic diagram of the global control circuit described in present example.
Specific implementation mode
With reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
IGBT collector currents size is determined by collection emitter-base bandgap grading saturation voltage drop with grid voltage, therefore can pass through control grid electricity
Size is pressed to regulate and control IGBT collector currents.The method that the present invention uses collector current closed loop feedback control, acquires each branch
Current calculation average value, which is used as, refers to signal, reaches regulation and control collector current by adjusting gate voltage values, to realize IGBT
The purpose of Current for paralleled in parallel.Structure of the invention and use device are simple, it is easy to accomplish, manual operation is saved, can be given birth in batches
Production has good economy.In addition, flow equalizing circuit of the present invention is not necessarily to the addition of buffer circuit, because without reducing
The switching frequency of IGBT.
Specifically, the present invention provides a kind of IGBT parallel connections Current for paralleled circuit, as shown in Figure 1 comprising N number of parallel connection
IGBT, and one-to-one N set local feedback control circuit identical as IGBT number and a set of global control circuit；N is big
In the natural number equal to 2.
Wherein, as shown in Fig. 2, local feedback control circuit includes the integral being connected in turn after corresponding IGBT emitter-base bandgap gradings inductance
Circuit, amplifying circuit, feedback and reference signal comparison circuit, adjuster and main driving circuit；The output end of main driving circuit
The grid of the corresponding IGBT of connection.
Wherein, the first operational amplifier of integrating circuit, be connected to the first operational amplifier negative input end input resistance R,
Be connected across the first operational amplifier negative input end and output end capacitor C and connection the first operational amplifier positive input terminal with
The resistance R of reference potential0；Its output end voltage and corresponding IGBT collector currents are proportional.Amplifying circuit includes the second operation
Amplifier, the input resistance R for being connected to second operational amplifier negative input end1, be connected across second operational amplifier negative input end
With the resistance R of output end2And the resistance R of connection second operational amplifier positive input terminal and reference potential10.Feedback is believed with reference
Number comparison circuit includes third operational amplifier, the resistance R being connected with collected feedback signalIAnd be connected with reference signal
Resistance RR, the other end of two resistance is connected with third operational amplifier positive input terminal；In the just defeated of third operational amplifier
Enter end and obtains the difference of feedback signal and reference signal.Reference signal is average with the calculated each parallel branch of global control circuit
Current value, when value of feedback reaches reference value, the positive input terminal voltage of operational amplifier is zero.Adjuster includes that third operation is put
Big device is connected with third operational amplifier negative input end, the other end connects the resistance R of reference potentialc1And one end connects third operation
Amplifier negative input end, the other end connect the series connection RC branches of third operational amplifier output terminal.Main driving circuit includes several groups
The push-pull amplifier circuit and resistance being made of triode or MOS power semiconductors, several groups push-pull amplifier circuit is simultaneously
Resistance is connected after connection.
As shown in figure 3, global control circuit includes reference signal amplifying circuit and reference signal counting circuit.Wherein,
The reference signal amplifying circuit includes four-operational amplifier, is connected to the input resistance of four-operational amplifier negative input end
Rref2And it is connected across the resistance R of four-operational amplifier negative input end and output endref1.Reference signal counting circuit the 4th is transported
Calculate amplifier and respectively with the one-to-one input resistance R of IGBTi, input resistance RiOne end and the corresponding locals IGBT feedback control
Integrating circuit input terminal connects in circuit, and the other end connects with four-operational amplifier positive input terminal.Each branch and electric current at than
The voltage signal v of exampleixIt is connected to operational amplifier positive input terminal by input resistance, when each input resistance resistance value is identical,
Four-operational amplifier positive input terminal obtains the average value of each input signal, and obtaining reference signal by amplifying circuit inputs each
In ground feedback control circuit.
Finally it should be noted that：Above example is merely illustrative of the invention's technical idea, and cannot limit this hair with this
Bright protection domain, every any change according to technological thought proposed by the present invention, done on the basis of technical solution, falls
Enter within the scope of the present invention.
Claims (6)
1. a kind of IGBT parallel connections Current for paralleled circuit, which is characterized in that including global control circuit, two at least in parallel
IGBT, and the local feedback control circuit that is arranged in a one-to-one correspondence respectively with IGBT；
The input terminal of the corresponding local feedback control circuit of emitter connection of IGBT, the corresponding local feedback control circuit of grid connection
Output end；Local feedback control circuit is connect with global control circuit respectively；
The local feedback control circuit is adjusted to corresponding IGBT according to reference signal and collected feedback signal and is sent out
The amplitude size of the drive signal sent；Reference signal is sent out by global drive delays time to control module；
The global control circuit is according to each IGBT Current calculations local feedback control circuit reference signal；
The overall situation control circuit includes reference signal amplifying circuit and reference signal counting circuit；
The reference signal amplifying circuit includes four-operational amplifier, be connected to four-operational amplifier negative input end enter end
Resistance Rref2And it is connected across the resistance R of four-operational amplifier negative input end and output endref1；
The reference signal counting circuit include four-operational amplifier and respectively with the one-to-one input resistance R of IGBTi, enter
Hold resistance RiOne end connects with integrating circuit input terminal in the feedback control circuit of the corresponding locals IGBT, and the other end is put with the 4th operation
Big device positive input terminal connects.
2. a kind of IGBT parallel connections Current for paralleled circuit according to claim 1, which is characterized in that the local feedback control
Circuit includes that integrating circuit after being connected to corresponding IGBT emitter-base bandgap gradings inductance in turn, amplifying circuit, feedback and reference signal are more electric
Road, adjuster and main driving circuit；The grid of the corresponding IGBT of output end connection of main driving circuit.
3. a kind of IGBT parallel connections Current for paralleled circuit according to claim 2, which is characterized in that the integrating circuit includes
First operational amplifier, the input resistance R for being connected to the first operational amplifier negative input end, to be connected across the first operational amplifier negative
The resistance R of the capacitor C and connection the first operational amplifier positive input terminal and reference potential of input terminal and output end0。
4. a kind of IGBT parallel connections Current for paralleled circuit according to claim 2, which is characterized in that the amplifying circuit includes
Second operational amplifier, the input resistance R for being connected to second operational amplifier negative input end1, be connected across second operational amplifier
The resistance R of negative input end and output end2And the resistance R of connection second operational amplifier positive input terminal and reference potential10。
5. a kind of IGBT parallel connections Current for paralleled circuit according to claim 2, which is characterized in that the feedback is believed with reference
Number comparison circuit includes third operational amplifier, the resistance R being connected with collected feedback signalIAnd be connected with reference signal
Resistance RR, the other end of two resistance is connected with third operational amplifier positive input terminal；
The adjuster includes third operational amplifier, is connected with third operational amplifier negative input end, the other end is even with reference to electricity
The resistance R of positionc1And one end connects third operational amplifier negative input end, the other end connects the string of third operational amplifier output terminal
Join RC branches.
6. a kind of IGBT parallel connections Current for paralleled circuit according to claim 2, which is characterized in that the main driving circuit packet
Push-pull amplifier circuit and resistance that several groups are made of triode or MOS power semiconductors are included, several groups, which are recommended, puts
Resistance is connected after big circuit in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610171989.1A CN105846658B (en) | 2016-03-23 | 2016-03-23 | A kind of IGBT parallel connections Current for paralleled circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610171989.1A CN105846658B (en) | 2016-03-23 | 2016-03-23 | A kind of IGBT parallel connections Current for paralleled circuit |
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| Publication Number | Publication Date |
|---|---|
| CN105846658A CN105846658A (en) | 2016-08-10 |
| CN105846658B true CN105846658B (en) | 2018-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109104174A (en) * | 2017-06-20 | 2018-12-28 | 华中科技大学 | A kind of master-slave mode IGBT driving circuit |
| CN110138185B (en) * | 2018-02-02 | 2022-04-19 | 固纬电子实业股份有限公司 | Parallel current sharing control method for staggered full-bridge converter of alternating current power supply device |
| CN108429434A (en) * | 2018-02-06 | 2018-08-21 | 创驱（上海）新能源科技有限公司 | A method of realizing real-time dynamic current equalizing between at least two power components |
| CN113437863B (en) * | 2021-04-28 | 2022-10-25 | 中南大学 | Parallel IGBT dynamic current-sharing buffer circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5909108A (en) * | 1998-02-23 | 1999-06-01 | Lucent Technologies Inc. | Current-sharing circuit for parallel-coupled switches and switch-mode power converter employing the same |
| JPH11235015A (en) * | 1998-02-13 | 1999-08-27 | Toshiba Corp | Voltage-driven power semiconductor device and method of controlling the gate of the same |
| CN101425798A (en) * | 2007-10-30 | 2009-05-06 | 比亚迪股份有限公司 | Dynamic current equalizing method and device for parallel IGBT |
| CN102545859A (en) * | 2010-10-22 | 2012-07-04 | Abb研究有限公司 | Gate driver unit for electrical switching device |
| CN103199679A (en) * | 2013-04-18 | 2013-07-10 | 电子科技大学 | Equalized current output circuit of insulated gate bipolar transistor |
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2016
- 2016-03-23 CN CN201610171989.1A patent/CN105846658B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11235015A (en) * | 1998-02-13 | 1999-08-27 | Toshiba Corp | Voltage-driven power semiconductor device and method of controlling the gate of the same |
| US5909108A (en) * | 1998-02-23 | 1999-06-01 | Lucent Technologies Inc. | Current-sharing circuit for parallel-coupled switches and switch-mode power converter employing the same |
| CN101425798A (en) * | 2007-10-30 | 2009-05-06 | 比亚迪股份有限公司 | Dynamic current equalizing method and device for parallel IGBT |
| CN102545859A (en) * | 2010-10-22 | 2012-07-04 | Abb研究有限公司 | Gate driver unit for electrical switching device |
| CN103199679A (en) * | 2013-04-18 | 2013-07-10 | 电子科技大学 | Equalized current output circuit of insulated gate bipolar transistor |
Non-Patent Citations (1)
| Title |
|---|
| Closed-Loop di/dt and dv/dt IGBT Gate Driver;Yanick Lobsiger,et.al.;《IEEE TRANSACTIONS ON POWER ELECTRONICS》;20150630;第30卷(第6期);第3402页、第3404－3411页 * |
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| CN105846658A (en) | 2016-08-10 |
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