CN206294063U - Improved-type Magnetic isolation IGBT drive circuit - Google Patents
Improved-type Magnetic isolation IGBT drive circuit Download PDFInfo
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- CN206294063U CN206294063U CN201621476717.4U CN201621476717U CN206294063U CN 206294063 U CN206294063 U CN 206294063U CN 201621476717 U CN201621476717 U CN 201621476717U CN 206294063 U CN206294063 U CN 206294063U
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- drive
- filter capacitor
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- resistance
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Abstract
The utility model is related to a kind of improved-type Magnetic isolation IGBT drive circuit, there is module, drive amplification module, primary side capacitance C1, primary side damping resistance R1, Multiple coil driving transformer, secondary bootstrap capacitor C6, secondary bootstrap diode D2, secondary push-pull drive resistance R3, push-pull circuit Q1 including driving, Q2, secondary commutation diode D1, secondary voltage-regulator diode ZD1, voltage regulation resistance R2, filter capacitor C2, C3, C4, C5 and floating drive IGBT.The circuit main components are connected according to the electrical connecting pattern shown in Fig. 1, and it drives generation module with the known technology that drive amplification module is in the technical field.The utility model can be on the basis of secondary side power supply not be provided, and improving traditional magnetic isolation drive circuit can not provide the technological deficiency that negative pressure is turned off, anti-interference is weaker.The utility model adapts to different IGBT, there is provided reliable, low cost Magnetic isolation drive scheme.
Description
Technical field
The utility model is related to a kind of drive circuit, and especially a kind of improved-type Magnetic isolation IGBT drive circuit, belongs to
IGBT actuation techniques field.
Background technology
With the fast development of Power Electronic Technique, the topology of many new excellent performances is occurred in that, such as in DC-AC families
The multi-level inverter circuit in face, the fast development of topology has promoted the demand of its isolation drive.Just because of this, various isolation drives
Scheme is arisen at the historic moment, wherein Magnetic isolation drive scheme have that circuit is simple, be hardly damaged, the advantage such as low cost, therefore Magnetic isolation exists
Current driving floatingly in topology has utilization rate very high, but is currently based on Magnetic isolation and drives and cannot provide negative pressure shut-off, anti-dry
The defect such as disturb that ability is weaker, be not suitable for big space rate and drive and also limit its broader practice space.
Insulated gate bipolar transistor IGBT is the multiple device of MOSFET and bipolar transistor.It both has power MOSFET
The advantage that input impedance is high, operating rate is fast, easily drive, and with bipolar Darlington power transistor GTO saturation voltages are low, electric current holds
Amount is big, the advantage of high pressure, and energy normal work sets in the big or middle power in tens KHz frequency ranges, therefore in upper frequency
It is standby（Such as frequency converter, ups power, photovoltaic DC-to-AC converter, high-frequency induction welder）Leading position is occupied in.
The target of isolated drive circuit is using limited device, there is provided as far as possible may the measured isolation to the greatest extent of reliable, performance
Drive scheme.
At present, traditional magnetic isolation drive circuit has Fig. 1 and Fig. 2 two ways.Wherein, Fig. 1 circuits belong to traditional magnetic
Isolation drive scheme, in actual application, due to capacitance be provided to one reverse voltage of transformer for
Transformer magnetic recovers, and its pressure drop is directly proportional to pulsewidth is driven, so circuit is only applicable to drive the less field of pulsewidth, such as
Field of switch power.For this situation, the follow-on magnetic isolation drive circuits of Fig. 2 are proposed, its circuit because adds two poles of bootstrapping
Pipe, bootstrap capacitor and preferably compensate for the pulse amplitude of primary side loss, and be used widely；But circuit shown in Fig. 2 because
There is no secondary side power supply, therefore it cannot provide negative pressure shut-off and cause its interference free performance weaker, and cause IGBT quick
Shut-off even misleads, and disadvantages mentioned above all makes it cannot apply in the equipment of relatively high power grade.
Fig. 1 and Fig. 2 is directed to the topology for needing Magnetic isolation to drive（Such as multi-electrical level inverter, BUCK reducing transformers, H4 inverter bridges
Deng）, it is impossible to meet high-power, the Magnetic isolation driving demand disturbed under more serious operating mode.
The content of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of improved-type Magnetic isolation IGBT drives
Dynamic circuit, its circuit structure is simple, it is easy to accomplish, good in anti-interference performance is applicable to that power grade is higher, and working environment is more
Plus in severe power electronic equipment.
According to the utility model provide technical scheme, the improved-type Magnetic isolation IGBT drive circuit, it is characterized in that：Bag
Include isolation drive transformer, primary side drive circuit, secondary drive circuit and secondary and drive rail circuit；
The primary side drive circuit includes driving generation module, drive amplification module, primary side capacitance C1 and primary side resistance
Buffer resistance R1；The isolation drive transformer includes primary side winding N1, the first vice-side winding N2 and the second vice-side winding N3；It is described
Secondary drive circuit includes secondary bootstrap capacitor C6, secondary bootstrap diode D2, secondary push-pull drive resistance R3 and push-pull circuit；
The secondary driving rail circuit includes secondary commutation diode D1, secondary voltage-regulator diode ZD1, voltage regulation resistance R2, filter capacitor
C2, filter capacitor C3, filter capacitor C4 and filter capacitor C5；
The primary side capacitance C1 and primary side damping resistance R1 connects, and is gone here and there with isolation drive transformer primary side winding N1
Connection；
One end of the first vice-side winding N2 connects the positive pole of secondary commutation diode D1, secondary commutation diode D1's
Negative pole connects the negative electrode of secondary voltage-regulator diode ZD1, one end of filter capacitor C2, one end of filter capacitor C4 and recommends electricity respectively
Road；The other end of the first vice-side winding N2 connects one end of voltage regulation resistance R2, one end of filter capacitor C3, filtered electrical respectively
Hold one end and the push-pull circuit of C5；The anode of the secondary voltage-regulator diode ZD1 connects the other end of voltage regulation resistance R2, filter respectively
The other end of ripple electric capacity C2, the other end of filter capacitor C3, the other end of filter capacitor C4, the other end of filter capacitor C5, with
And the emitter stage of IGBT device；
One end of the second vice-side winding N3 connects one end of secondary bootstrap capacitor C6, and secondary bootstrap capacitor C6's is another
End connects the negative pole of secondary bootstrap diode D2 and one end of secondary push-pull drive resistance R3 respectively, and secondary recommends the another of resistance R3
One end connects push-pull circuit；The other end of the second vice-side winding N3 connects the positive pole of secondary bootstrap diode D2 and pushes away respectively
Draw circuit；
The push-pull circuit includes that power tube Q1 and power tube Q2, power tube Q1 directly connect with power tube Q2, series connection
Midpoint is extremely connected with the G of IGBT device.
Further, the D poles of the power tube Q1 drive the negative electrode of the voltage-stabiliser tube ZD1 in rail circuit to be connected with secondary, work(
The S poles of rate pipe Q2 are with secondary drivingly and filter capacitor C3, filter capacitor C5 and voltage regulation resistance R2 are connected.
Advantage of the present utility model：By increasing vice-side winding, voltage stabilizing, and structure are carried out after rectifying and wave-filtering is carried out to its voltage
The positive-negative power rail drivingly and required for driving IGBT of IGBT is produced, is carried out by being recommended in driving secondary increase
The driving of IGBT, can so provide negative voltage driving level to IGBT, the noise margin of IGBT is more increased, antijamming capability
It is better, it is also possible to be optimized the switching characteristics such as IGBT hangovers inherently, reduce the dead band of IGBT series connection applications
Time, in a disguised form expand the application scenario of the Magnetic isolation drive scheme.
Brief description of the drawings
Fig. 1 is prior art typical case's Magnetic isolation IGBT drive circuit schematic diagram.
Fig. 2 is prior art modified Magnetic isolation IGBT drive circuit schematic diagram.
Fig. 3 is structured flowchart of the present utility model.
Specific embodiment
With reference to specific accompanying drawing, the utility model is described in further detail.
As shown in figure 3, improved-type Magnetic isolation IGBT drive circuit described in the utility model includes driving and there is module, drive
Amplification module, isolation drive transformer, primary side drive circuit, secondary drive circuit and secondary drive rail circuit.Specifically include：
Primary side capacitance C1, primary side damping resistance R1, secondary bootstrap capacitor C6, secondary bootstrap diode D2, secondary push-pull drive electricity
Resistance R3, push-pull circuit, secondary commutation diode D1, secondary voltage-regulator diode ZD1, voltage regulation resistance R2, the first filter capacitor C2, the
Two filter capacitor C3, the 3rd filter capacitor C4, the 4th filter capacitor C5 and floating drive IGBT.
The isolation drive transformer is used to for the pulse width signal carrying out isolation processing, obtains isolation signals and will be every
From signal transmission to secondary drive circuit and secondary current rectifying and wave filtering circuit construct drivingly and drive positive-negative power rail.
The secondary drive circuit is used for lossless transmission drive signal, and drives corresponding IGBT device by push-pull circuit.
The secondary drives rail circuit for producing the positive-negative power rail used by driving IGBT, and it includes any driving amplitude
Parameter.
The primary side drive circuit includes driving generation module, drive amplification module, primary side capacitance C1 and primary side resistance
Buffer resistance R1；The isolation drive transformer includes primary side winding N1, the first vice-side winding N2 and the second vice-side winding N3；It is described
Secondary drive circuit includes secondary bootstrap capacitor C6, secondary bootstrap diode D2, secondary push-pull drive resistance R3, push-pull circuit.
The primary side capacitance C1, primary side damping resistance R1 connect, and are gone here and there with isolation drive transformer primary side winding N1
Connection.
The push-pull circuit includes that power tube Q1 and power tube Q2, power tube Q1 directly connect with power tube Q2, series connection
Midpoint is extremely connected with the G of IGBT device, omits herein and drives resistance Rg.The D poles of the power tube Q1 drive rail circuit with secondary
In the negative electrode of voltage-stabiliser tube ZD1 be connected, the S poles of power tube Q2 with secondary drivingly and filter capacitor C3, filter capacitor C5 and
Voltage regulation resistance R2 is connected.
The turn ratio of the primary side winding N1 of the isolation drive transformer, the first vice-side winding N2 and the second vice-side winding N3
Example could be arranged to arbitrarily meet the setting for driving and requiring.
The secondary drive rail circuit include secondary commutation diode D1, secondary voltage-regulator diode ZD1, voltage regulation resistance R2,
Filter capacitor C2, filter capacitor C3, filter capacitor C4 and filter capacitor C5, wherein filter capacitor C2 and filter capacitor C3 connect,
Filter capacitor C4 and filter capacitor C5 connects, and the midpoint of filter capacitor C2 and filter capacitor C3 connects the E poles of IGBT device, filtering
The midpoint of electric capacity C4 and filter capacitor C5 connects the E poles of IGBT, constructs IGBT device drivingly.
It should be noted that isolation drive transformer is likely to be and is operated in flyback mode, it is also possible to be positive energizing mode,
It could also be possible that integrated mode.
Also, it should be noted that drive resistance Rg not provide in the diagram, because it can be any value relatable, herein
It is not described.
In the utility model embodiment, drive and module and drive amplification module occur, belong to public in field of power electronics
Know technology, thus physical circuit here is omitted.
The secondary is driven in rail circuit, and secondary commutation diode D1 should be placed on from the ground driven close to vice-side winding
Side, it is to avoid the secondary of high-frequency signal produces radiation, has influence on other equipment normal work.Voltage-regulator diode ZD1 and voltage regulation resistance
Lime light when R2 chooses is mainly the relation that voltage stabilizing punctures the corresponding leakage current of depth and the power match of voltage regulation resistance, needs
Suitable voltage regulation resistance is selected, to avoid the electrical resistance overheats Problem of Failure during circuit longtime running.
The utility model can be on the basis of secondary side power supply not be provided, and improving traditional magnetic isolation drive circuit can not
The technological deficiency that negative pressure is turned off, anti-interference is weaker is provided.The utility model adapts to different IGBT, there is provided it is reliable, low into
This Magnetic isolation drive scheme.
Claims (2)
1. a kind of improved-type Magnetic isolation IGBT drive circuit, it is characterized in that：Including isolation drive transformer, primary side drive circuit,
Secondary drive circuit and secondary drive rail circuit；
The primary side drive circuit includes driving generation module, drive amplification module, primary side capacitance C1 and primary side damping electricity
Resistance R1；The isolation drive transformer includes primary side winding N1, the first vice-side winding N2 and the second vice-side winding N3；The secondary
Drive circuit includes secondary bootstrap capacitor C6, secondary bootstrap diode D2, secondary push-pull drive resistance R3 and push-pull circuit；It is described
Secondary driving rail circuit includes secondary commutation diode D1, secondary voltage-regulator diode ZD1, voltage regulation resistance R2, filter capacitor C2, filter
Ripple electric capacity C3, filter capacitor C4 and filter capacitor C5；
The primary side capacitance C1 and primary side damping resistance R1 connects, and is connected with isolation drive transformer primary side winding N1；
One end of the first vice-side winding N2 connects the positive pole of secondary commutation diode D1, the negative pole of secondary commutation diode D1
Negative electrode, one end of filter capacitor C2, one end of filter capacitor C4 and the push-pull circuit of secondary voltage-regulator diode ZD1 are connected respectively；
The other end of the first vice-side winding N2 connects one end of voltage regulation resistance R2, one end of filter capacitor C3, filter capacitor respectively
One end of C5 and push-pull circuit；The anode of the secondary voltage-regulator diode ZD1 connects the other end of voltage regulation resistance R2, filtering respectively
The other end of electric capacity C2, the other end of filter capacitor C3, the other end of filter capacitor C4, the other end of filter capacitor C5 and
The emitter stage of IGBT device；
One end of the second vice-side winding N3 connects one end of secondary bootstrap capacitor C6, the other end point of secondary bootstrap capacitor C6
Not Lian Jie secondary bootstrap diode D2 negative pole and one end of secondary push-pull drive resistance R3, secondary recommends the other end of resistance R3
Connection push-pull circuit；The other end of the second vice-side winding N3 connects the positive pole of secondary bootstrap diode D2 and recommends electricity respectively
Road；
The push-pull circuit includes that power tube Q1 and power tube Q2, power tube Q1 directly connect with power tube Q2, the midpoint of series connection
Extremely it is connected with the G of IGBT device.
2. improved-type Magnetic isolation IGBT drive circuit as claimed in claim 1, it is characterized in that：The D poles of the power tube Q1 with
Secondary drives the negative electrode of the voltage-stabiliser tube ZD1 in rail circuit to be connected, and the S poles of power tube Q2 are with secondary drivingly and filter capacitor
C3, filter capacitor C5 are connected with voltage regulation resistance R2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621476717.4U CN206294063U (en) | 2016-12-30 | 2016-12-30 | Improved-type Magnetic isolation IGBT drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621476717.4U CN206294063U (en) | 2016-12-30 | 2016-12-30 | Improved-type Magnetic isolation IGBT drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206294063U true CN206294063U (en) | 2017-06-30 |
Family
ID=59098606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621476717.4U Withdrawn - After Issue CN206294063U (en) | 2016-12-30 | 2016-12-30 | Improved-type Magnetic isolation IGBT drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206294063U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712470A (en) * | 2016-12-30 | 2017-05-24 | 江苏中科君芯科技有限公司 | Improved magnetic isolation type IGBT driving circuit |
| CN110838753A (en) * | 2018-08-15 | 2020-02-25 | 维谛技术有限公司 | UPS auxiliary power supply system |
-
2016
- 2016-12-30 CN CN201621476717.4U patent/CN206294063U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106712470A (en) * | 2016-12-30 | 2017-05-24 | 江苏中科君芯科技有限公司 | Improved magnetic isolation type IGBT driving circuit |
| CN106712470B (en) * | 2016-12-30 | 2023-03-17 | 江苏中科君芯科技有限公司 | Improved magnetic isolation IGBT driving circuit |
| CN110838753A (en) * | 2018-08-15 | 2020-02-25 | 维谛技术有限公司 | UPS auxiliary power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170630 Effective date of abandoning: 20230317 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20170630 Effective date of abandoning: 20230317 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |