CN102710103B - Double-circuit high-voltage large power IGBT (Insulated Gate Bipolar Translator) drive circuit - Google Patents
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Abstract
The invention discloses a double-circuit high-voltage large power IGBT (Insulated Gate Bipolar Translator) drive circuit and relates to the technical field of IGBT drive. The circuit consists of a double-circuit interlocking and optical signal transforming transmission circuit and a double-circuit driving module, wherein the double-circuit interlocking and optical signal transforming transmission circuit adopts a hardware interlocking circuit to interlock the received double-circuit driving signal; the interlocked driving signal is input to the double-circuit driving module to switch IGBT; the driving signal processed by the double-circuit interlocking and optical signal transforming transmission circuit is a double-circuit turn-off signal, or one-circuit signal is the turn-off signal, and the other circuit signal is an open signal. The drive circuit has the advantages that an optical fiber and an isolation power source are used as isolation media to improve the isolation voltage grade; the drive circuit is perfected in the protecting functions, and the IGBT drive circuit is high in reliability and low in cost.
Description
Technical field
The present invention 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 part is MOSFET, and output stage is 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 safety operation area is wide, thereby IGBT is widely used in big-power transducer and Switching Power Supply constant power equipment.IGBT Driving technique is one of key in IGBT application process, and the output characteristic of drive circuit and short circuit overcurrent defencive function are the prerequisites of IGBT safety, efficient operation.IGBT drive circuit should have enough safe isolation voltages in application process, ensures the electrical isolation between current transformer control loop and loop of power circuit.It is little that good IGBT drive circuit also should have control signal transmission delay, turns on and off the time controlled, and the stable feature such as turning-on voltage and driving power and self-protection can be provided.Especially while being applied in frequency convertor system; IGBT drive circuit must have accurately short circuit overcurrent defencive function reliably to IGBT; and in the time being applied to frequency converter semi-bridge type IGBT driving, the hardware interlock function of dual input signal is also vital to the protection of frequency convertor system.In addition,, along with the use amount of IGBT drive circuit increases day by day, in ensureing that driveability is good, reduce volume and reduce costs also necessary.
Existing IGBT drives in product, the Driving technique that is mainly divided into the Driving technique based on opto-coupler chip isolation and isolates based on pulse transformer.Opto-coupler chip cheapness, but isolation voltage grade is low, 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.The subject matter that current IGBT drives product to exist is to take into account good driving and protective value and cheap cost.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the invention provides a kind of two-way high-power IGBT drive circuit, there is high-isolating and drive the two-way IGBT drive circuit of signal logic interlock function, this circuit is taken into account good performance and feature cheaply.
The present invention 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 hardware interlock circuit to drive signal to carry out interlock process the two-way receiving, driving signal after interlock process inputs to two-way driver module IGBT is carried out to switching manipulation, it is two-way cut-off signals that two-way interlocking and light signal transform radiating circuit driving signal after treatment, or wherein a road signal is cut-off signals, another road signal is for opening signal, described two-way interlocking and light signal transform radiating circuit and comprise driving signal logic interlock circuit, first via light signal transforms emission interface and the second road light signal transforms emission interface, drive the input of signal logic interlock circuit to be connected with the signal output part of controller, drive signal to carry out logical interlock processing to two-way, drive the output of signal logic interlock circuit to be connected with first via light signal conversion emission interface and the second road light signal conversion emission interface, first via light signal conversion emission interface and the second road light signal conversion emission interface are converted into light signal by two path signal respectively and go out through Optical Fiber Transmission, the core devices that drives signal logic interlock circuit be XOR gate chip U18 and with door chip U19, it is signal launching fiber head U20 that first via light signal transforms emission interface, and it is signal launching fiber head U21 that the second road light signal transforms emission interface, the pin one of XOR gate chip U18 and pin two receive respectively the two-way driving signal that upper level controller is exported, the pin 5 of XOR gate chip U18 is connected with pin one, the pin 8 of XOR gate chip U18 is connected with pin two, the pin 6 of XOR gate chip U18 and the equal ground connection of pin 9, the pin 3 of XOR gate chip U18 simultaneously be connected with pin one 5 with the pin one of door chip U19, the pin 4 of XOR gate chip U18 be connected with the pin one 6 of door chip U19, the pin one 0 of XOR gate chip U18 be connected with the pin one 4 of door chip U19, two-way has realized logical interlock after driving signal to process through XOR gate chip U18 with door chip U19, be connected with the pin one of signal launching fiber head U20 after 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 by the first via signal of telecommunication and launches through optical fiber, be connected with the pin one of signal launching fiber head U21 after 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 by the second road signal of telecommunication and launches through optical fiber,
Described two-way driver module comprises first via fault-signal emission interface, the first via drives signal receiving interface, the second road drives signal receiving interface, the second road fault-signal emission interface, the first via+5V voltage stabilizing circuit, the second tunnel+5V voltage stabilizing circuit, first via DC/DC power module, the second road DC/DC power module, first via logic control circuit, the second road logic control circuit, first via power amplification circuit and the second road power amplification circuit, above-mentioned device forms 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 is connected with first via logic control circuit, 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 to be connected with first via logic control circuit, the driving signal receiving is converted into the signal of telecommunication by light signal, then be input in first via logic control circuit, first via logic control circuit is connected with first via power amplification circuit, first via power amplification circuit output connects IGBT, first via DC/DC power module is connected with first via power amplification circuit and the first via+5V voltage stabilizing circuit respectively, first via power amplification circuit provides necessary driving power, and provide power supply for the first via+5V voltage stabilizing circuit, the first via+5V voltage stabilizing circuit provides power supply for first via fault-signal emission interface and the first via drive signal receiving interface.
The invention has the beneficial effects as follows: utilize optical fiber and insulating power supply as spacer medium, improved isolation voltage grade; This drive circuit defencive function is perfect, and reliability is high, with low cost.
Brief description of the drawings
Below in conjunction with accompanying drawing and example, the present invention will be further described.
Fig. 1 is principle of the invention block diagram;
Fig. 2 is that two-way interlocking and light signal transform radiating circuit figure;
Fig. 3 is that in two-way driver module, light signal transforms receiving circuit figure.
Embodiment
As shown in Figure 1, a kind of two-way high-power IGBT drive circuit is by 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 hardware interlock circuit to drive signal to carry out interlock process the two-way receiving, driving signal after interlock process inputs to two-way driver module 2 IGBT is carried out to switching manipulation, it is two-way cut-off signals that two-way interlocking and light signal transform radiating circuit 1 driving signal after treatment, or wherein a road signal is cut-off signals, another road signal is for opening signal, but there will not be two-way simultaneously for opening signal.Two-way interlocking and light signal transform between radiating circuit 1 and 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, drive the input of signal logic interlock circuit U1 to be connected with the signal output part of controller, drive signal to carry out logical interlock processing to two-way, drive the output of signal logic interlock circuit U1 to be connected with first via light signal conversion emission interface U2 and the second road light signal conversion emission interface U3, first via light signal conversion emission interface U2 and the second road light signal conversion emission interface U3 are converted into light signal by 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 road drives signal receiving interface U6, 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 second road DC/DC power module U11, first via logic control circuit U12, the second road logic control circuit U13, first via power amplification circuit U14 and the second road power amplification circuit U15, above-mentioned device forms 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 is structurally symmetrical, so the annexation of first via signal path is specifically described.First via fault-signal emission interface U4 is connected 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 to be connected with first via logic control circuit U12, the driving signal receiving is converted into the signal of telecommunication by light signal, then be input in first via logic control circuit U12, first via logic control circuit U12 is connected with first via power amplification circuit U14, first via power amplification circuit U14 output connects IGBT, first via DC/DC power module U10 is connected 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 provide 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 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, the output being connected with IGBT base stage in the first via with in the second tunnel and between the output that is connected of IGBT collector output, be connected.Two core devices that drive optocoupler ACPL332J to drive respectively signal logic control as two-way, its light-coupled isolation function is left in the basket, and mainly utilizes its defencive function to drive circuit self and the defencive function to 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.In the time the under-voltage fault of driving voltage being detected, will block and drive signal, and feedback fault-signal, be transferred to controller through fault-signal output optical fibre interface; In the time IGBT over current fault being detected, first IGBT is carried out to soft shutoff operation, avoid occurring great surge voltage, feed back fault-signal to fault-signal optical fiber emission interface simultaneously, malfunction is informed to controller.Occurring when over current fault, logic control circuit sends soft cut-off signals and after power amplification circuit, controls IGBT and carry out soft shutoff, and then protection IGBT device.Two-way driver module and IGBT are electrically connected, and directly IGBT are carried out to switching manipulation.Utilize Optical Fiber Transmission control signal to realize the electrical isolation between control circuit and driver module, utilize DC/DC power module to realize the electrical isolation between drive circuit and power supply, finally make major loop and control loop realize 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 first via drives signal receiving interface U5 and the second road to drive the core devices of signal receiving interface U6 all to adopt 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 DC/DC modular power source of 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, drive the core devices of 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; 74ACT11008 type and a door chip with door chip U19 employing TEXAS INSTRUMENTS company; It is signal launching fiber head U20 that first via light signal transforms emission interface U2, and it is signal 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 two-way driving signal that upper level controller is exported, the pin 5 of XOR gate chip U18 is connected with pin one, the pin 8 of XOR gate chip U18 is connected with pin two, the pin 6 of XOR gate chip U18 and the equal ground connection of pin 9.The pin 3 of XOR gate chip U18 simultaneously be connected with pin one 5 with the pin one of door chip U19, the pin 4 of XOR gate chip U18 be connected with the pin one 6 of door chip U19, the pin one 0 of XOR gate chip U18 be connected with the pin one 4 of door chip U19.Two-way has realized logical interlock after driving signal to process through XOR gate chip U18 with door chip U19.Be connected with the pin one of signal launching fiber head U20 after 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 by the first via signal of telecommunication and launches through optical fiber; Be connected with the pin one of signal launching fiber head U21 after 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 by the second road signal of telecommunication and launches through optical fiber.This circuit utilizes hardware to realize the logical interlock of double switch signal, the signal of telecommunication is converted into light signal for transmission simultaneously.
As shown in Figure 3, in two-way driver module, first via light signal conversion circuit comprises that the first via drives signal receiving interface and first via fault-signal emission interface.Because the circuit of two paths of signals path is full symmetric, be only 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; It is that signal receives optical fiber head U23 that the first via drives the core devices of signal receiving interface U5, adopts the HFBR2521 type optical fiber head of Agilent company; First via logic control circuit U12 drives chip U25 to form by NOR gate chip U24 and optocoupler; 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 to adopt the ACPL332J type IGBT of Avago company to drive opto-coupler chip.
Adopt light signal to receive optical fiber head U23 the light signal receiving is converted into the signal of telecommunication, its pin two ground connection, connect+5V of pin 3 power supply, after being connected with pin 4, the signal output pin 1 of optical fiber head U22 is connected with pin 5 and the pin 6 of NOR gate chip U24 simultaneously, utilize NOR gate chip U24 to carry out logic negate to signal, then the output pin 4 of NOR gate U24 drives the pin 6 of chip U25 to be connected with pin 7 with optocoupler after 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, the equal ground connection of pin 8.For fault feedback signal, optocoupler drives the fault status signal output pin 3 of chip U25 to be connected with pin 3 with the pin two of NOR gate U24 simultaneously, team's fault status signal carries out logic negate processing, and between the fault status signal output pin 3 of U25 and signal ground, be connected in series the capacitor C 1 of 300pF, be connected in series 2.2k Ω resistance R 4 simultaneously with between+5V power supply.The pin one of NOR gate chip U24 is connected with the pin two of signal launching fiber head U22.The pin one of signal launching fiber head U22 is connected with+5V power supply after 200 Ω current-limiting resistance R3.Signal launching fiber head U22 is converted into light signal by fault-signal and launches by optical fiber.
Compare with existing technology: two-way interlocking and light signal transform in radiating circuit and adopt hardware interlock circuit to drive signal to process to two-way, realize the logical interlock of two paths of signals, in the time driving for two level current transformer half-bridge IGBT, moment guarantee can only have an IGBT to open, and has improved the safety and stability of system.Adopt optical fiber that control circuit is connected 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 subject 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 signal logic control circuit to have the under-voltage detection of driving voltage and IGBT short circuit overcurrent monitoring function, driving voltage is under-voltage, and measuring ability has avoided IGBT to be operated in non-saturated region because driving voltage is not enough, has improved the stability of system.IGBT short circuit overcurrent monitoring function has been avoided, due to operate miss or malfunctioning the caused overcurrent of some hardware, having improved the safety and stability of system.Drive circuit adopts the special driving opto-coupler chip of IGBT ACPL332J as core, utilize optical fiber isolation to avoid the low shortcoming of its isolation voltage, because it is more cheap, significantly reduce the cost of drive circuit simultaneously, finally made whole drive circuit have both function admirable and feature with low cost.
Claims (1)
1. a 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 hardware interlock circuit to drive signal to carry out interlock process the two-way receiving, driving signal after interlock process inputs to two-way driver module (2) IGBT is carried out to switching manipulation, it is two-way cut-off signals that two-way interlocking and light signal transform radiating circuit (1) driving signal after treatment, or wherein a road signal is cut-off signals, another road signal is for opening signal,
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), drive the input of signal logic interlock circuit (U1) to be connected with the signal output part of controller, drive signal to carry out logical interlock processing to two-way, drive the output of signal logic interlock circuit (U1) to be connected with first via light signal conversion emission interface (U2) and the second road light signal conversion emission interface (U3), first via light signal conversion emission interface (U2) and the second road light signal conversion emission interface (U3) are converted into light signal by two path signal respectively and go out through Optical Fiber Transmission, drive signal logic interlock circuit (U1) core devices be XOR gate chip U18 and with door chip U19, it is signal launching fiber head U20 that first via light signal transforms emission interface (U2), and it is signal launching fiber head U21 that the second road light signal transforms emission interface (U3), the pin one of XOR gate chip U18 and pin two receive respectively the two-way driving signal that upper level controller is exported, the pin 5 of XOR gate chip U18 is connected with pin one, the pin 8 of XOR gate chip U18 is connected with pin two, the pin 6 of XOR gate chip U18 and the equal ground connection of pin 9, the pin 3 of XOR gate chip U18 simultaneously be connected with pin one 5 with the pin one of door chip U19, the pin 4 of XOR gate chip U18 be connected with the pin one 6 of door chip U19, the pin one 0 of XOR gate chip U18 be connected with the pin one 4 of door chip U19, two-way has realized logical interlock after driving signal to process through XOR gate chip U18 with door chip U19, be connected with the pin one of signal launching fiber head U20 after 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 by the first via signal of telecommunication and launches through optical fiber, be connected with the pin one of signal launching fiber head U21 after 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 by the second road signal of telecommunication and launches through optical fiber,
Described two-way driver module (2) comprises first via fault-signal emission interface (U4), the first via drives signal receiving interface (U5), the second road drives signal receiving interface (U6), 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 second road DC/DC power module (U11), first via logic control circuit (U12), the second road logic control circuit (U13), first via power amplification circuit (U14) and the second road power amplification circuit (U15), above-mentioned device forms 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) is connected 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) to be connected with first via logic control circuit (U12), the driving signal receiving is converted into the signal of telecommunication by light signal, then be input in first via logic control circuit (U12), first via logic control circuit (U12) is connected with first via power amplification circuit (U14), first via power amplification circuit (U14) output connects IGBT, first via DC/DC power module (U10) is connected with first via power amplification circuit (U14) and the first via+5V voltage stabilizing circuit (U8) respectively, first via power amplification circuit (U14) provide necessary driving power, and provide power supply for the first via+5V voltage stabilizing circuit (U8), the first via+5V voltage stabilizing circuit (U8) is that first via fault-signal emission interface (U4) and the first via drive signal receiving interface (U5) that power supply is provided.
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| CN103812312B (en) * | 2012-11-08 | 2016-08-24 | 中车大同电力机车有限公司 | AuCT buck chopper power model driving means |
| CN105119469B (en) * | 2015-08-28 | 2018-11-30 | 洛阳中重自动化工程有限责任公司 | Multi-path driving signal switching circuit and method for mining explosion-proof frequency converter |
| CN105720808A (en) * | 2016-03-16 | 2016-06-29 | 珠海格力电器股份有限公司 | Inverter startup short-circuit protection method and device |
| CN106549561A (en) * | 2016-11-25 | 2017-03-29 | 奇瑞汽车股份有限公司 | upper and lower bridge drive signal drive circuit |
| CN113376431B (en) * | 2021-06-28 | 2022-05-06 | 东风汽车集团股份有限公司 | High-precision voltage detection circuit and detection method |
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