CN202696456U - Two-way high-voltage and high-power IGBT (Insulated Gate Bipolar Translator) driving circuit - Google Patents
Two-way high-voltage and high-power IGBT (Insulated Gate Bipolar Translator) driving circuit Download PDFInfo
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- CN202696456U CN202696456U CN 201220236723 CN201220236723U CN202696456U CN 202696456 U CN202696456 U CN 202696456U CN 201220236723 CN201220236723 CN 201220236723 CN 201220236723 U CN201220236723 U CN 201220236723U CN 202696456 U CN202696456 U CN 202696456U
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Abstract
The utility model discloses a two-way high-voltage and high-power IGBT (Insulated Gate Bipolar Translator) driving circuit and relates to the technical field of IGBT driving. The driving circuit consists of a two-way interlocking and optical signal conversion and transmitting circuit, and a two-way driving module, wherein the two-way interlocking and optical signal conversion and transmitting circuit adopts a hardware interlocking circuit for interlocking processing of received two-way driving signals, the driving signals after the interlocking processing are input into the two-way driving module for switching operation on an IGBT, the driving signals processed by the two-way interlocking and optical signal conversion and transmitting circuit are two-way turn-off signals, or one way of signals are turn-off signals, and the other way of signals are turn-on signals. The two-way high-voltage and high-power IGBT driving circuit has the advantages of utilizing optical fiber and an isolating power supply as isolating media to improve the isolating voltage grade and being complete in protection function, high in reliability and low in cost.
Description
Technical field
The utility model relates to IGBT Driving technique field, specifically a kind of two-way high-power IGBT drive circuit.
Background technology
Insulated gate bipolar transistor IGBT is a kind of multiple device, its input control partly is MOSFET, and output stage is the dipole triode transistor, and it is high that it has MOSFET input impedance concurrently, voltage control, driving power is little, and switching speed is fast, the advantage that operating frequency is higher, having again electric power triode saturation pressure reduces, voltage, current capacity are large, the advantage that the safety operation area is wide, thereby IGBT is widely used in big-power transducer and the Switching Power Supply constant power equipment.The IGBT Driving technique is one of key in the IGBT application process, and the output characteristic of drive circuit and short circuit overcurrent defencive function are the prerequisites of IGBT safety, efficient operation.The IGBT drive circuit should have enough safe isolation voltages in application process, guarantee the electrical isolation between current transformer control loop and loop of power circuit.It is little that good IGBT drive circuit also should have a control signal transmission delay, turns on and off the time controlled, and stable turning-on voltage and the characteristics such as driving power and self-protection can be provided.When especially being applied in the frequency convertor system; the IGBT drive circuit must have accurately reliably short circuit overcurrent defencive function to IGBT; and when being applied to frequency converter semi-bridge type IGBT driving, the hardware interlock function of dual input signal also is vital to the protection of frequency convertor system.In addition, along with the use amount of IGBT drive circuit increases day by day, when guaranteeing that driveability is good, reduce volume and reduce cost also necessary.
Existing IGBT drives in the product, mainly is divided into based on the Driving technique of opto-coupler chip isolation and the Driving technique of isolating based on pulse transformer.Opto-coupler chip is cheap, but the isolation voltage grade is low, and transmission delay is high, and range of application is narrow.Driving properties of product based on pulse transformer are good, but cost is very high.It is to take into account good driving and protective value and cheap cost that present IGBT drives the product Main Problems.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the utility model provides a kind of two-way high-power IGBT drive circuit, has the two-way IGBT drive circuit of high-isolating and driving signal logic interlock function, and this circuit is taken into account good performance and hanged down into
This characteristics.
The utility model is that following technical scheme realizes: a kind of two-way high-power IGBT drive circuit, comprise that two-way interlocking and light signal transform radiating circuit and two-way driver module, two-way interlocking and light signal transform radiating circuit and adopt the hardware interlock circuit that the two-way driving signal that receives is carried out interlock process, driving signal after interlock process inputs to the two-way driver module IGBT is carried out switching manipulation, the driving signal that two-way interlocking and light signal transform after radiating circuit is processed is the two-way cut-off signals, perhaps wherein one road signal is cut-off signals, and another road signal is for opening signal.
The beneficial effects of the utility model are: utilize optical fiber and insulating power supply as spacer medium, improved the isolation voltage grade; This drive circuit defencive function is perfect, and reliability is high, and is with low cost.
Description of drawings
Below in conjunction with accompanying drawing and example the utility model is described further.
Fig. 1 is the utility model theory diagram;
Fig. 2 is that two-way interlocking and light signal transform radiating circuit figure;
Fig. 3 is that light signal transforms receiving circuit figure in the two-way driver module.
Embodiment
As shown in Figure 1, two-way high-power IGBT drive circuit is by the two-way interlocking and light signal transforms radiating circuit 1 and two-way driver module 2 forms, two-way interlocking and light signal transform radiating circuit 1 and adopt the hardware interlock circuit that the two-way driving signal that receives is carried out interlock process, driving signal after interlock process inputs to 2 couples of IGBT of two-way driver module and carries out switching manipulation, the driving signal that two-way interlocking and light signal transform after radiating circuit 1 is processed is the two-way cut-off signals, perhaps wherein one road signal is cut-off signals, another road signal is for opening signal, but two-way can not occur simultaneously for opening signal.Two-way interlocking and light signal transform between radiating circuit 1 and the two-way driver module 2 and connect by optical fiber.
Two-way interlocking and light signal transform radiating circuit 1 and comprise driving signal logic interlock circuit U1, first via light signal transforms emission interface U2 and the second road light signal transforms emission interface U3, the input that drives signal logic interlock circuit U1 links to each other with the signal output part of controller, the two-way control signal is carried out logical interlock to be processed, the output that drives signal logic interlock circuit U1 transforms emission interface U3 with first via light signal conversion emission interface U2 and the second road light signal and links to each other, and first via light signal conversion emission interface U2 and the second road light signal conversion emission interface U3 are converted into light signal with two path signal respectively and go out through Optical Fiber Transmission.
Two-way driver module 2 comprises first via fault-signal emission interface U4, the first via drives signal receiving interface U5, the second the road drives signal receiving interface U6, the the second road fault-signal emission interface U7, the first via+5V voltage stabilizing circuit U8, the second tunnel+5V voltage stabilizing circuit U9, first via DC/DC power module U10, the the second road DC/DC power module U11, first via logic control circuit U12, the the second road logic control circuit U13, first via power amplification circuit U14 and the second road power amplification circuit U15, above-mentioned device consists of first via signal path and the second road signal path, device annexation in the second road signal path is corresponding with the first via
Because two-way structurally is symmetrical, so the annexation of first via signal path is specifically described.First via fault-signal emission interface U4 links to each other with first via logic control circuit U12, the fault status signal that logic control circuit is sent is converted into light signal by the signal of telecommunication, and send through optical fiber head: the first via drives signal receiving interface U5 and links to each other with first via logic control circuit U12, to receive to such an extent that the driving signal is converted into the signal of telecommunication by light signal, then be input among the first via logic control circuit U12, first via logic control circuit U12 links to each other with first via power amplification circuit U14, first via power amplification circuit U14 output connects IGBT, first via DC/DC power module U10 links to each other with first via power amplification circuit U14 and the first via+5V voltage stabilizing circuit U8 respectively, for first via power amplification circuit U14 provides necessary driving power, and for the first via+5V voltage stabilizing circuit U8 provides power supply, the first via+5V voltage stabilizing circuit U8 provides power supply for first via fault-signal emission interface U4 and the first via drive signal receiving interface U5.
Device annexation in the second road signal path is corresponding with the first via, first via signal path and the second road signal path were electrical isolation before power amplification circuit, only have in the end power amplification circuit output, link to each other between the output that links to each other with the IGBT collector output in the output and the second tunnel that links to each other with the IGBT base stage in the first via.Two drive optocoupler ACPL332J drive respectively signal logic control as two-way core devices, and its light-coupled isolation function is left in the basket, and mainly utilize it to the defencive function of drive circuit self with to the defencive function of IGBT.
The driving signal that logic control circuit sends is through power amplification circuit rear drive IGBT device, and logic control circuit has the under-voltage monitoring of driving voltage and IGBT short circuit overcurrent monitoring function simultaneously, and power amplification circuit and IGBT ruuning situation are monitored.When detecting the under-voltage fault of driving voltage, will block and drive signal, and the feedback fault-signal, be transferred to controller through fault-signal output optical fibre interface; When detecting the IGBT over current fault, at first IGBT is carried out soft shutoff operation, avoid occurring great surge voltage, feed back simultaneously fault-signal to fault-signal optical fiber emission interface, malfunction is informed controller.When over current fault occured, logic control circuit sent soft cut-off signals and control IGBT carry out soft shutoff behind power amplification circuit, and then protects the IGBT device.Two-way driver module and IGBT are electrically connected, and directly IGBT are carried out switching manipulation.Utilize the electrical isolation between Optical Fiber Transmission control signal realization control circuit and driver module, utilize the electrical isolation between DC/DC power module realization drive circuit and power supply, final so that major loop and control loop are realized effective electrical isolation.
In the present embodiment, the core devices of first via fault-signal emission interface U4 and the second road fault-signal emission interface U7 all adopts the HFBR1521 type optical fiber head of Agilent company; The core devices that the first via drives signal receiving interface U5 and the second tunnel driving signal receiving interface U6 all adopts the HFBR2521 type optical fiber head of Agilent company; The core devices of first via DC/DC power module U10 and the second road DC/DC power module U11 all adopts the special-purpose DC/DC modular power source of the QA04 type IGBT driver of Jin Shengyang company; The core devices of the first via+5V voltage stabilizing circuit U8 and the second tunnel+5V voltage stabilizing circuit U9 all adopts the LM7805 voltage stabilizing chip of STMicroelectronics company.The core devices of first via logic control circuit U12 and the second road logic control circuit U13 all adopts the ACPL332J type IGBT of Avago company to drive opto-coupler chip.It is core circuit that the D44VH10 type of first via power amplification circuit U14 and the second road power amplification circuit U15 employing ON Semiconductor company and D45VH10 triode are recommended the way of output.
As shown in Figure 2, the core devices that drives signal logic interlock circuit U1 be XOR gate chip U18 and with door chip U19; XOR gate chip U18 adopts the SN74HC266D type XOR gate chip of TEXAS INSTRUMENTS company; Adopt the 74ACT11008 type and door chip of TEXAS INSTRUMENTS company with door chip U19; It is signal launching fiber head U20 that first via light signal transforms emission interface U2, and it is launching fiber head U21 that the second road light signal transforms emission interface U3, and launching fiber head U20 and U21 all adopt the HFBR1521 type optical fiber head of Agilent company.
The pin one of XOR gate chip U18 and pin two receive respectively the double switch control signal that the upper level controller is exported, the pin 5 of XOR gate chip U18 links to each other with pin one, the pin 8 of XOR gate chip U18 links to each other with pin two, the pin 6 of XOR gate chip U18 and pin 9 equal ground connection.The pin 3 of XOR gate chip U18 simultaneously with link to each other with pin one 5 with the pin one of door chip U21, the pin 4 of XOR gate chip U18 links to each other with pin one 6 with door chip U21, the pin one 0 of XOR gate chip U18 links to each other with pin one 4 with door chip U19.The double switch control signal has namely realized logical interlock after processing through XOR gate chip U18 with door chip U19.Link to each other with the pin one of signal launching fiber head U20 behind 200 Ω current-limiting resistance R1 with the output pin 2 of door chip U19, the pin two ground connection of signal launching fiber head U20, signal launching fiber head U20 is converted into light signal with the first via signal of telecommunication and launches through optical fiber; Link to each other with the pin one of signal launching fiber head U21 behind 200 Ω current-limiting resistance R2 with the output pin 3 of door chip U19, the pin two ground connection of signal launching fiber head U21, signal launching fiber head U21 is converted into light signal with the second road signal of telecommunication and launches through optical fiber.This circuit utilizes hardware to realize the logical interlock of double switch signal, simultaneously the signal of telecommunication is converted into light signal and is used for transmission.
As shown in Figure 3, first via light signal conversion circuit comprises that the first via drives signal receiving interface and first via fault-signal emission interface in the two-way driver module.Because the circuit of two paths of signals path is full symmetric, only is elaborated with the first via.Wherein, the core devices of first via fault-signal emission interface U4 is signal launching fiber head U22, adopts HFBR1521 type optical fiber head; The core devices that the first via drives signal receiving interface U5 is that signal receives optical fiber head U23, adopts the HFBR2521 type optical fiber head of Agilent company; First via logic control circuit U12 drives chip U25 by NOR gate chip U24 and optocoupler and forms; NOR gate chip U24 adopts the SN54AC02 type NOR gate chip of TEXAS INSTRUMENTS company, wherein optocoupler drives the core devices of chip U25 first via logic control circuit U12, and optocoupler drives chip U25 and adopts the ACPL332J type IGBT of Avago company to drive opto-coupler chip.
Adopt light signal to receive optical fiber head U23 the light signal that receives is converted into the signal of telecommunication, its pin two ground connection, pin 3 connects+the 5V power supply, after linking to each other with pin 4, the signal output pin 1 of optical fiber head U22 links to each other with pin 5 and the pin 6 of NOR gate chip U24 simultaneously, utilize NOR gate chip U24 that signal is carried out the logic negate, then the output pin 4 of NOR gate U24 links to each other with pin 7 with the pin 6 of optocoupler driving chip U25 behind 500 Ω current-limiting resistance R5 simultaneously, send control signal to optocoupler and drive chip U25, optocoupler drives the pin one of chip U25, pin 4, pin 5, pin 8 equal ground connection.For the fault feedback signal, the fault status signal output pin 3 that optocoupler drives chip U25 links to each other with pin 3 with the pin two of NOR gate U24 simultaneously, team's fault status signal carries out the logic negate to be processed, and be connected in series the capacitor C 1 of 300pF between the fault status signal output pin 3 of U25 and the signal ground, be connected in series 2.2k Ω resistance R 4 simultaneously with between+5V power supply.The pin one of NOR gate chip U24 links to each other with the pin two of signal launching fiber head U22.The pin one of signal launching fiber head U22 links to each other with+5V power supply behind 200 Ω current-limiting resistance R3.Signal launching fiber head U22 is converted into light signal with fault-signal and launches by optical fiber.
Compare with existing technology: two-way interlocking and light signal transform and adopt the hardware interlock circuit that two-way driving signal is processed in the radiating circuit, realized the logical interlock of two paths of signals, when being used for two level current transformer half-bridge IGBT driving, constantly guaranteeing to have an IGBT to open, and has improved Security of the system and stability.Adopt optical fiber that control circuit is linked to each other with drive circuit, enough climbing distances can be provided, and then reach very high voltage isolation Level.Light signal transmits in optical fiber, and transmission speed is fast, is not subjected to the impact of outside electromagnetic interference and variation of ambient temperature, can realize long Distance Transmission, has increased flexibility and the stability of whole system.Drive the signal logic control circuit and have the under-voltage detection of driving voltage and IGBT short circuit overcurrent monitoring function, the under-voltage measuring ability of driving voltage has avoided IGBT to be operated in non-saturated region because driving voltage is not enough, has improved Systems balanth.IGBT short circuit overcurrent monitoring function has avoided because operate miss or the malfunctioning overcurrent that causes of some hardware have improved Security of the system and stability.Drive circuit adopts the special-purpose opto-coupler chip ACPL332J that drives of IGBT as core, utilize the optical fiber isolation to avoid the low shortcoming of its isolation voltage, because it is cheap, significantly reduced the cost of drive circuit simultaneously, final so that whole drive circuit has both function admirable and characteristics with low cost.
Claims (3)
1. two-way high-power IGBT drive circuit, it is characterized in that: comprise that two-way interlocking and light signal transform radiating circuit (1) and two-way driver module (2), two-way interlocking and light signal transform radiating circuit (1) and adopt the hardware interlock circuit that the two-way driving signal that receives is carried out interlock process, driving signal after interlock process inputs to two-way driver module (2) IGBT is carried out switching manipulation, the driving signal that two-way interlocking and light signal transform after radiating circuit (1) is processed is the two-way cut-off signals, perhaps wherein one road signal is cut-off signals, and another road signal is for opening signal.
2. two-way high-power IGBT drive circuit according to claim 1 is characterized in that: described two-way interlocking is connected radiating circuit (1) with light signal and is connected with two-way driver module (2) by optical fiber.
3. two-way high-power IGBT drive circuit according to claim 1 and 2, it is characterized in that: described two-way interlocking and light signal transform radiating circuit (1) and comprise driving signal logic interlock circuit (U1), first via light signal transforms emission interface (U2) and the second road light signal transforms emission interface (U3), the input that drives signal logic interlock circuit (U1) links to each other with the signal output part of controller, the two-way control signal is carried out logical interlock to be processed, the output that drives signal logic interlock circuit (U1) transforms emission interface (U3) with first via light signal conversion emission interface (U2) and the second road light signal and links to each other, and first via light signal conversion emission interface (U2) and the second road light signal conversion emission interface (U3) are converted into light signal with two path signal respectively and go out through Optical Fiber Transmission;
Described two-way driver module (2) comprises first via fault-signal emission interface (U4), the first via drives signal receiving interface (U5), the second the road drives signal receiving interface (U6), the the second road fault-signal emission interface (U7), the first via+5V voltage stabilizing circuit (U8), the second tunnel+5V voltage stabilizing circuit (U9), first via DC/DC power module (U10), the the second road DC/DC power module (U11), be first via logic control circuit (U12), the the second road logic control circuit (U13), first via power amplification circuit (U14) and the second road power amplification circuit (U15), above-mentioned device consists of first via signal path and the second road signal path, device annexation in the second road signal path is corresponding with the first via
First via fault-signal emission interface (U4) links to each other with first via logic control circuit (U12), the fault status signal that logic control circuit is sent is converted into light signal by the signal of telecommunication, and send through optical fiber head: the first via drives signal receiving interface (U5) and links to each other with first via logic control circuit (U12), to receive to such an extent that the driving signal is converted into the signal of telecommunication by light signal, then be input in the first via logic control circuit (U12), first via logic control circuit (U12) links to each other with first via power amplification circuit (U14), first via power amplification circuit (U14) output connects IGBT, first via DC/DC power module (U10) links to each other with first via power amplification circuit (U14) and the first via+5V voltage stabilizing circuit (U8) respectively, first via power amplification circuit (U14) provides necessary driving power, and providing power supply for the first via+5V voltage stabilizing circuit (U8), the first via+5V voltage stabilizing circuit (U8) provides power supply for first via fault-signal emission interface (U4) and first via driving signal receiving interface (U5).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220236723 CN202696456U (en) | 2012-05-24 | 2012-05-24 | Two-way high-voltage and high-power IGBT (Insulated Gate Bipolar Translator) driving circuit |
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| CN 201220236723 CN202696456U (en) | 2012-05-24 | 2012-05-24 | Two-way high-voltage and high-power IGBT (Insulated Gate Bipolar Translator) driving circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710103A (en) * | 2012-05-24 | 2012-10-03 | 中国矿业大学 | Double-circuit high-voltage large power IGBT (Insulated Gate Bipolar Translator) drive circuit |
| CN105471234A (en) * | 2015-12-16 | 2016-04-06 | 山西惠特科技有限公司 | Optical fiber signal conversion circuit for 3,300V high-power IGBT driver |
| CN107528456A (en) * | 2017-10-19 | 2017-12-29 | 合肥联信电源有限公司 | A kind of high power module optical fiber drive signal change-over panel |
-
2012
- 2012-05-24 CN CN 201220236723 patent/CN202696456U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710103A (en) * | 2012-05-24 | 2012-10-03 | 中国矿业大学 | Double-circuit high-voltage large power IGBT (Insulated Gate Bipolar Translator) drive circuit |
| CN102710103B (en) * | 2012-05-24 | 2014-11-26 | 中国矿业大学 | Double-circuit high-voltage large power IGBT (Insulated Gate Bipolar Translator) drive circuit |
| CN105471234A (en) * | 2015-12-16 | 2016-04-06 | 山西惠特科技有限公司 | Optical fiber signal conversion circuit for 3,300V high-power IGBT driver |
| CN105471234B (en) * | 2015-12-16 | 2018-02-23 | 山西惠特科技有限公司 | Fiber-optic signal change-over circuit for the driving of 3300V high-power IGBTs |
| CN107528456A (en) * | 2017-10-19 | 2017-12-29 | 合肥联信电源有限公司 | A kind of high power module optical fiber drive signal change-over panel |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20130524 |