CN105846658A - IGBT parallel static current sharing circuit - Google Patents
IGBT parallel static current sharing circuit Download PDFInfo
- Publication number
- CN105846658A CN105846658A CN201610171989.1A CN201610171989A CN105846658A CN 105846658 A CN105846658 A CN 105846658A CN 201610171989 A CN201610171989 A CN 201610171989A CN 105846658 A CN105846658 A CN 105846658A
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- circuit
- igbt
- operational amplifier
- resistance
- control circuit
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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 invention provides an IGBT parallel static current sharing circuit which has advantages of static current sharing, accurate and reliable current sharing adjustment, stable switching frequency, long service life, and high suitability for power electronic equipment which requires IGBT parallel connection and is on for a long time period. The IGBT parallel static current sharing circuit comprises a global control circuit, at least two parallel IGBTs, and local feedback control circuits which are arranged in one-to-one correspondence with the IGBTs. The emitter electrode of each IGBT is connected with the input end of a corresponding local feedback control circuit, and the gate electrode is connected with the output end of the corresponding local feedback control circuit. The local feedback control circuits are connected with the global control circuit. The local feedback control circuits are used for adjusting the amplitude of a driving signal transmitted to the corresponding IGBT according to the acquired feedback signals and a reference signal that is transmitted by a global driving time delay control module. The global control circuit is used for computing the reference signal of the local feedback control circuit according to each IGBT current.
Description
Technical field
The present invention relates to electric and electronic technical field, be specially a kind of IGBT parallel connection Current for paralleled circuit.
Background technology
Insulated gate bipolar transistor (IGBT) is owing to combining MOSFET (MOSFET)
With the advantage of power transistor, there is input impedance high, drive power little, the advantages such as switching characteristic is good,
It is a kind of preferably wholly-controled device, is widely used in power electronic equipment.But, right
In the power electronic equipment of high-power, the current class of single IGBT cannot meet wanting of equipment
Asking, this makes to be together in parallel many IGBT becomes an effective selection as an elementary cell.
In IGBT parallel connection application, each IGBT inherent parameters inconsistent, it is likely to result in each parallel IGBT
The equivalent resistance of branch inconsistent, thus by unbalanced for the quiescent current that causes each paralleling switch pipe.Portion
Divide IGBT long-term work at higher currents, excessive accumulated heat can be produced, ultimately result in device failure, and
The damage of partial switch pipe will further result in the overall damage of rest switch pipe.Therefore, IGBT is also
The static uneven flow problem of solution is needed in connection application badly.
Summary of the invention
For problems of the prior art, the present invention provides a kind of IGBT parallel connection Current for paralleled electricity
Road, it is possible to realize Current for paralleled, carries out current-sharing regulation accurately and reliably, and switching frequency is stable, service life
Long it is particularly suited for needing IGBT used in parallel and the power electronic equipment of long-term conducting.
The present invention is to be achieved through the following technical solutions:
A kind of IGBT parallel connection Current for paralleled circuit, including overall situation control circuit, at least two in parallel
IGBT, and the local feedback control circuit arranged with IGBT one_to_one corresponding respectively；The transmitting of IGBT
Pole connects the input of corresponding local feedback control circuit, and grid connects corresponding local feedback control circuit
Outfan；Local feedback control circuit is connected with overall situation control circuit respectively；Described local feedback control
Circuit is for the reference signal sent according to the feedback signal collected and global drive delays time to control module
Regulate the amplitude size driving signal sent to corresponding IGBT；Described overall control circuit is used for
According to each IGBT Current calculation this locality feedback control circuit reference signal.
Preferably, after described local feedback control circuit includes being connected to corresponding IGBT emitter-base bandgap grading inductance in turn
Integrating circuit, amplifying circuit, feedback and reference signal comparison circuit, actuator and main driving electricity
Road；The outfan of main drive circuit connects the grid of corresponding IGBT.
Further, described integrating circuit include the first operational amplifier, be connected to the first operational amplifier bear
The input resistance R of input, it is connected across the first operational amplifier negative input end capacitor C with outfan
And connect the resistance R of the first operational amplifier positive input terminal and reference potential0。
Further, described amplifying circuit include the second operational amplifier, be connected to the second operational amplifier bear
The input resistance R of input1, be connected across the resistance R of the second operational amplifier negative input end and outfan2
And connect the resistance R of the second operational amplifier positive input terminal and reference potential10。
Further, described feedback and reference signal comparison circuit include the 3rd operational amplifier, and collect
Feedback signal be connected resistance RIAnd the resistance R being connected with reference signalR, the other end of two resistance
All it is connected with the 3rd operational amplifier positive input terminal；Described actuator includes the 3rd operational amplifier, with
Three operational amplifier negative input ends are connected, the other end connects the resistance R of reference potentialc1, and one end connects
Three operational amplifier negative input ends, the other end connects the series connection RC branch road of the 3rd operational amplifier output terminal.
Further, described main drive circuit includes some groups by audion or MOS power semiconductor
The push-pull amplifier circuit of composition and resistance, connect grid electricity after some groups of push-pull amplifier circuit parallel connections
Resistance.
Preferably, overall situation control circuit includes reference signal amplifying circuit and reference signal counting circuit.
Further, reference signal amplifying circuit includes four-operational amplifier, is connected to the 4th operation amplifier
The input resistance R of device negative input endref2And it is connected across four-operational amplifier negative input end and outfan
Resistance Rref1。
Further, described reference signal counting circuit include four-operational amplifier and respectively with IGBT
Input resistance R one to onei, input resistance RiOne end and corresponding IGBT this locality feedback control circuit
Middle integrating circuit input connects, and the other end and four-operational amplifier positive input terminal connect.
Compared with prior art, the present invention has a following useful technique effect:
1, a kind of IGBT parallel connection Current for paralleled circuit that the present invention provides, controls with the overall situation and this locality is anti-
The two-step evolution that feedback controls is core, can obtain each IGBT branch by reference signal counting circuit
Current average, as the local feedback control circuit of reference value input, reaches to adjust the quiet of parallel IGBT
The purpose of state not current-sharing.This circuit has built rear fully automatic operation, it is not necessary to manual operation, eliminates people
Power cost.Local feedback control circuit uses closed loop feedback to control, improve the accuracy of current-sharing regulation with
Reliability.
2, the IGBT parallel current-equalizing circuit that the present invention provides is without the addition of buffer circuit, because of without
Reduce the switching frequency of IGBT.
3, the IGBT parallel current-equalizing circuit that the present invention provides can reduce IGBT because long-term work is relatively
The accumulated heat caused under big electric current, extends the life-span of switching tube, reduces and damages, good economy performance.
4, the IGBT parallel current-equalizing circuit that the present invention provides is realized by printing pcb board, is conducive to real
Existing mass production.
Accompanying drawing explanation
Fig. 1 is the structural representation of the IGBT parallel connection Current for paralleled circuit 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 overall control circuit described in present example.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, described in be to the present invention
Explanation rather than restriction.
IGBT collector current size is determined with grid voltage by collecting emitter-base bandgap grading saturation voltage drop, therefore can pass through
Control gate voltage swing regulates and controls IGBT collector current.The present invention uses collector current closed loop anti-
The method that feedback controls, gathers each branch current and calculates meansigma methods as reference signal, by adjusting grid electricity
Pressure value reaches collector current, thus realizes the purpose of IGBT parallel connection Current for paralleled.The present invention ties
Structure and use device are simple, it is easy to accomplish, save manual operation, can produce in batches, there is good warp
Ji property.It addition, flow equalizing circuit of the present invention is without the addition of buffer circuit, because of without reducing
The switching frequency of IGBT.
Concrete, the present invention provides a kind of IGBT parallel connection Current for paralleled circuit, as it is shown in figure 1, its bag
Include that IGBT with the IGBT number of N number of parallel connection is identical and N set local feedback control electricity one to one
Road and a set of overall situation control circuit；N is the natural number more than or equal to 2.
Wherein, as in figure 2 it is shown, local feedback control circuit includes being connected to corresponding IGBT emitter-base bandgap grading in turn
Integrating circuit after inductance, amplifying circuit, feedback are driven with reference signal comparison circuit, actuator and master
Galvanic electricity road；The outfan of main drive circuit connects the grid of corresponding IGBT.
Wherein, integrating circuit the first operational amplifier, be connected to entering of the first operational amplifier negative input end
End resistance R, it is connected across the capacitor C of the first operational amplifier negative input end and outfan and is connected
First operational amplifier positive input terminal and the resistance R of reference potential0；Its output end voltage and corresponding IGBT
Collector current is proportional.Amplifying circuit includes the second operational amplifier, is connected to the second operational amplifier
The input resistance R of negative input end1, be connected across the resistance of the second operational amplifier negative input end and outfan
R2And connect the resistance R of the second operational amplifier positive input terminal and reference potential10.Feedback and reference letter
Number comparison circuit includes the 3rd operational amplifier, the resistance R being connected with the feedback signal collectedIAnd with
The resistance R that reference signal is connectedR, the other end of two resistance all with the 3rd operational amplifier positive input terminal
It is connected；Positive input terminal at the 3rd operational amplifier obtains the difference of feedback signal and reference signal.With reference to letter
Number for the overall situation each parallel branch average current value of calculating of control circuit, when value of feedback reaches reference value
Time operational amplifier positive input terminal voltage be zero.Actuator includes the 3rd operational amplifier, with the 3rd fortune
Calculate the resistance R that amplifier negative input end is connected, the other end connects reference potentialc1, and one end connects the 3rd fortune
Calculating amplifier negative input end, the other end connects the series connection RC branch road of the 3rd operational amplifier output terminal.Master drives
Galvanic electricity road include the some groups of push-pull amplifier circuits being made up of audion or MOS power semiconductor and
Resistance, connects resistance after some groups of push-pull amplifier circuit parallel connections.
As it is shown on figure 3, overall situation control circuit includes that reference signal amplifying circuit and reference signal calculate electricity
Road.Wherein, described reference signal amplifying circuit includes four-operational amplifier, is connected to the 4th computing and puts
The input resistance R of big device negative input endref2And it is connected across four-operational amplifier negative input end and output
The resistance R of endref1.Reference signal counting circuit four-operational amplifier and respectively with IGBT one_to_one corresponding
Input resistance Ri, input resistance RiOne end and integration electricity in the feedback control circuit of corresponding IGBT this locality
Road input connects, and the other end and four-operational amplifier positive input terminal connect.Each branch road becomes ratio with electric current
The voltage signal v of exampleixIt is connected to operational amplifier positive input terminal, when each input resistance through input resistance
When resistance is identical, obtain the meansigma methods of each input signal, Jing Guofang at four-operational amplifier positive input terminal
Big circuit obtains in each local feedback control circuit of reference signal input.
Finally should be noted that: above example is only the technological thought that the present invention is described, it is impossible to this
Limiting protection scope of the present invention, every technological thought proposed according to the present invention, on technical scheme basis
On any change of being done, within each falling within scope.
Claims (9)
1. an IGBT parallel connection Current for paralleled circuit, it is characterised in that include overall situation control circuit, extremely
The IGBT of few two in parallel, and the local feedback control electricity arranged with IGBT one_to_one corresponding respectively
Road；
The input of the corresponding local feedback control circuit of emitter stage connection of IGBT, grid connects correspondence originally
The outfan of ground feedback control circuit；Local feedback control circuit is connected with overall situation control circuit respectively；
Described local feedback control circuit regulates to right according to reference signal and the feedback signal that collects
The amplitude size driving signal that the IGBT answered sends；Reference signal is by global drive delays time to control module
Send；
Described overall control circuit is according to each IGBT Current calculation this locality feedback control circuit reference letter
Number.
A kind of IGBT parallel connection Current for paralleled circuit the most according to claim 1, its feature exists
In, described local feedback control circuit includes the integration electricity after being connected to corresponding IGBT emitter-base bandgap grading inductance in turn
Road, amplifying circuit, feedback and reference signal comparison circuit, actuator and main drive circuit；Main driving
The outfan of circuit connects the grid of corresponding IGBT.
A kind of IGBT parallel connection Current for paralleled circuit the most according to claim 2, it is characterised in that
Described integrating circuit include the first operational amplifier, be connected to the first operational amplifier negative input end enter end
Resistance R, it is connected across the capacitor C of the first operational amplifier negative input end and outfan and is connected
One operational amplifier positive input terminal and the resistance R of reference potential0。
A kind of IGBT parallel connection Current for paralleled circuit the most according to claim 2, it is characterised in that
Described amplifying circuit include the second operational amplifier, be connected to the second operational amplifier negative input end enter end
Resistance R1, be connected across the resistance R of the second operational amplifier negative input end and outfan2And connect second
Operational amplifier positive input terminal and the resistance R of reference potential10。
A kind of IGBT parallel connection Current for paralleled circuit the most according to claim 2, its feature exists
In, described feedback and reference signal comparison circuit include the 3rd operational amplifier, with the feedback letter collected
Number connected resistance RIAnd the resistance R being connected with reference signalR, the other end of two resistance is all with the 3rd
Operational amplifier positive input terminal is connected；
Described actuator includes the 3rd operational amplifier, is connected with the 3rd operational amplifier negative input end, separately
One end connects the resistance R of reference potentialc1, and one end connects the 3rd operational amplifier negative input end, the other end
The even series connection RC branch road of the 3rd operational amplifier output terminal.
A kind of IGBT parallel connection Current for paralleled circuit the most according to claim 2, it is characterised in that
Described main drive circuit includes that some groups are put by recommending of forming of audion or MOS power semiconductor
Big circuit and resistance, connect resistance after some groups of push-pull amplifier circuit parallel connections.
A kind of IGBT parallel connection Current for paralleled circuit the most according to claim 1, it is characterised in that
Described overall situation control circuit includes reference signal amplifying circuit and reference signal counting circuit.
A kind of IGBT parallel connection Current for paralleled circuit the most according to claim 7, it is characterised in that
Described reference signal amplifying circuit includes four-operational amplifier, is connected to four-operational amplifier negative input
The input resistance R of endref2And it is connected across the resistance of four-operational amplifier negative input end and outfan
Rref1。
A kind of IGBT parallel connection Current for paralleled circuit the most according to claim 8, it is characterised in that
Described reference signal counting circuit includes four-operational amplifier and enters end respectively with IGBT one to one
Resistance Ri, input resistance RiOne end inputs with integrating circuit in the feedback control circuit of corresponding IGBT this locality
End connects, and the other end and four-operational amplifier positive input terminal connect.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105846658A true CN105846658A (en) | 2016-08-10 |
| CN105846658B CN105846658B (en) | 2018-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610171989.1A Active CN105846658B (en) | 2016-03-23 | 2016-03-23 | A kind of IGBT parallel connections Current for paralleled circuit |
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| Country | Link |
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| CN (1) | CN105846658B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109104174A (en) * | 2017-06-20 | 2018-12-28 | 华中科技大学 | A kind of master-slave mode IGBT driving circuit |
| CN110138185A (en) * | 2018-02-02 | 2019-08-16 | 固纬电子实业股份有限公司 | The misphase formula full-bridge inverter current sharing control method of AC power source feeding mechanism |
| CN113437863A (en) * | 2021-04-28 | 2021-09-24 | 中南大学 | Parallel IGBT dynamic current-sharing buffer circuit |
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| 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 |
|---|
| YANICK LOBSIGER,ET.AL.: "Closed-Loop di/dt and dv/dt IGBT Gate Driver", 《IEEE TRANSACTIONS ON POWER ELECTRONICS》 * |
Cited By (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 |
| CN110138185A (en) * | 2018-02-02 | 2019-08-16 | 固纬电子实业股份有限公司 | The misphase formula full-bridge inverter current sharing control method of AC power source feeding mechanism |
| 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 |
| CN113437863A (en) * | 2021-04-28 | 2021-09-24 | 中南大学 | Parallel IGBT dynamic current-sharing buffer circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105846658B (en) | 2018-07-17 |
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