CN105445639A - IGBT output characteristic test device - Google Patents

IGBT output characteristic test device Download PDF

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Publication number
CN105445639A
CN105445639A CN201510983141.4A CN201510983141A CN105445639A CN 105445639 A CN105445639 A CN 105445639A CN 201510983141 A CN201510983141 A CN 201510983141A CN 105445639 A CN105445639 A CN 105445639A
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China
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resistance
pin
igbt
circuit
connect
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CN201510983141.4A
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李磊
宁圃奇
孟金磊
温旭辉
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Institute of Electrical Engineering of CAS
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Institute of Electrical Engineering of CAS
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Priority to CN201510983141.4A priority Critical patent/CN105445639A/en
Publication of CN105445639A publication Critical patent/CN105445639A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/26Testing of individual semiconductor devices
    • G01R31/2607Circuits therefor
    • G01R31/2608Circuits therefor for testing bipolar transistors

Abstract

The invention relates to an IGBT output characteristic test device. According to the IGBT output characteristic test device, a power source circuit is connected with an IGBT main circuit, an IGBT driving circuit, a relay circuit, an AD acquisition circuit and a DSP controller; the IGBT driving circuit, the relay circuit and the AD acquisition circuit are connected in parallel; one end of the IGBT driving circuit, one end of the relay circuit and one end of the AD acquisition circuit are connected with the DSP controller, and the other ends of the IGBT driving circuit, the relay circuit and the AD acquisition circuit are connected with the IGBT main circuit; the IGBT driving circuit converts driving signals outputted by the DSP controller into driving pulses so as to control on-off of an IGBT to be tested in the IGBT main circuit; the relay circuit completes the switching of a power source in the IGBT main circuit through the switching of a relay; the AD acquisition circuit acquires collector current of the IGBT to be tested in the IGBT main circuit and voltage between the collector and emitter of the IGBT to be tested and converts the collector current and the voltage between the collector and emitter into voltages signals and inputs the voltages signals into the AD sampling port of the DSP controller; and the DSP controller outputs driving signals of the IGBT, controls the switching of the relay, samples the collector current of the IGBT to be tested and the voltage signals between the collector and emitter which are converted by the AD acquisition circuit and stores the converted signals.

Description

A kind of IGBT output characteristics proving installation
Technical field
The present invention relates to a kind of device of test I GBT output characteristics.
Background technology
In recent years, IGBT becomes current application all-controlling power electronics device the most widely with the advantage of himself.The output characteristics of IGBT reflects its relation under different gate voltage between on-state voltage drop and on state current intuitively, determines that IGBT on-state loss has directive significance to user of service.
Data in IGBT device databook get based on some specific test circuits, have bigger difference with practical application circuit.Therefore, before the use, the output characteristics measuring IGBT is by experiment needed.
At present, the method obtaining IGBT output characteristics mainly contains following two kinds:
The first is the sweep test using special semiconductor devices static parameter tester to carry out output characteristics.This type of equipment price is very expensive, comparatively conventional in the semiconductor devices inspection center of specialty; In addition, it is tested mainly for device itself, and does not consider the impact of side circuit, and therefore its test result has some limitations.
The second is pointwise test method, namely tests the IGBT conduction voltage drop under different electric current, thus draws out complete output characteristic curve.This kind of mode can be tested for physical circuit, and result is comparatively practical; But test process comparatively bothers, follow-up data work for the treatment of amount is larger.
Summary of the invention
The object of the invention is to the shortcoming overcoming existing method of testing, propose a kind of proving installation of IGBT output characteristics.The present invention can complete the test of 1 to 8 IGBT output characteristics automatically, and the mean value of store test results.
For achieving the above object, the present invention by the following technical solutions:
The present invention includes power circuit, IGBT main circuit, IGBT drive circuit, relay circuit, AD Acquisition Circuit and dsp controller.Described power circuit is connected with IGBT main circuit, IGBT drive circuit, relay circuit, AD Acquisition Circuit and dsp controller respectively; Described IGBT drive circuit, relay circuit and AD Acquisition Circuit are in parallel, IGBT drive circuit in parallel, relay circuit are connected dsp controller with one end of AD Acquisition Circuit, and IGBT drive circuit in parallel, relay circuit are connected IGBT main circuit with the other end of AD Acquisition Circuit.
Described power circuit comprises a binary channels D.C. regulated power supply and two power transfer module.The model of binary channels D.C. regulated power supply is DH1718E-4; The passage one of binary channels D.C. regulated power supply exports+18V voltage, the negative output terminal ground connection of passage one, and connecting the pin 2 of the first power transfer module and the pin 1 of second source modular converter, the positive output end of passage one connects driving chip IC in the pin 1 of the first power transfer module, the pin 2 of second source modular converter and IGBT drive circuit 1pin 8; The negative output terminal ground connection of binary channels D.C. regulated power supply passage two, and the voltage negative input end connecting IGBT main circuit, the positive output end of passage two connects the voltage positive input terminal of IGBT main circuit.The model of the first power transfer module is MD20-24D15, and its effect is that+18V voltage signal is converted into ± 15V voltage signal; The pin 1 of the first power transfer module connects the positive output end of binary channels D.C. regulated power supply passage one, pin 2 ground connection, and connects the negative output terminal of binary channels D.C. regulated power supply passage one; Pin 3 and the pin 7 of the first power transfer module are unsettled, pin 5 ground connection, and pin 4 and pin 6 export+15V voltage and-15V voltage respectively; The pin 4 of the first power transfer module connects current sensor IC in AD Acquisition Circuit 2the pin 6 of pin 3, first power transfer module connect current sensor IC in AD Acquisition Circuit 2pin 1.The model of second source conversion module is XZR-05, and its effect is that+18V voltage signal is converted into+5V voltage signal; Pin 1 ground connection of second source modular converter, and connect the negative output terminal of binary channels D.C. regulated power supply passage one, the pin 2 of second source modular converter connects the positive output end of binary channels D.C. regulated power supply passage one, the pin 3 of second source modular converter exports+5V voltage, pin 4 is unsettled, pin 5 ground connection; The pin 3 of second source modular converter connects the contact 4 of relay circuit repeat circuit and the voltage positive input terminal of dsp controller respectively.
Described IGBT main circuit structure is as follows: voltage positive input terminal and the voltage negative input end of IGBT main circuit are connected positive output end and the negative output terminal of binary channels D.C. regulated power supply passage two respectively; The voltage positive input terminal of IGBT main circuit is connected in series positive pole and the current sensor IC that contact 2 that the first resistance is connected to contact 1, first relay of the first relay is connected to the first electric capacity 2pin 5, current sensor IC 2pin 6 connect the negative electrode of the first diode and one end of the first inductance, the anode of the first diode is connected the collector of IGBT to be measured with the other end of the first inductance, the voltage negative input end grounding of IGBT main circuit, and connect the negative pole of the first electric capacity and the emitter of IGBT to be measured.
Described IGBT drive circuit comprises driving chip IC 1, three resistance and an electric capacity, driving chip IC 1model be HCNW3120.Driving chip IC 1pin 1 and pin 4 unsettled; Driving chip IC 1pin 2 be connected in series the second resistance and connect the port one 6 of dsp controller; Driving chip IC 1pin 3 ground connection, and connect the port 30 of dsp controller; Driving chip IC 1pin 5 ground connection, and connect the emitter of IGBT to be measured in IGBT main circuit; Driving chip IC 1pin 6 and pin 7 short circuit, be connected to one end of the 3rd resistance; Driving chip IC 1pin 8 connect the positive output end of binary channels D.C. regulated power supply DH1718E-4 passage one.One end of 3rd resistance connects driving chip IC 1pin 6 and pin 7, the other end connects the grid of IGBT to be measured in IGBT main circuit; 4th resistance and the second Capacitance parallel connection, one end connects the grid of IGBT to be measured in IGBT main circuit, and the other end connects the emitter of IGBT to be measured.
Described relay circuit comprises a relay, diode, a triode and two resistance.The contact 1 of the first relay connects one end of the first resistance in IGBT main circuit; The contact 2 of the first relay connects positive pole and the current sensor IC of the first electric capacity in IGBT main circuit 2pin 5; The contact 3 of the first relay is unsettled; The contact 4 of the first relay connects the pin 3 of second source modular converter in power circuit; The contact 5 of the first relay connects the collector of the first triode; The port 6 of dsp controller is connected after gate pole serial connection the 5th resistance of the first triode; Ground connection after emitter serial connection the 6th resistance of the first triode.
Described AD Acquisition Circuit comprises current sensor IC 2with 11 resistance, current sensor IC 2model be HX-50P.Current sensor IC 2pin 1 connect the pin 6 of the first power transfer module in power circuit; Current sensor IC 2pin 2 ground connection; Current sensor IC 2pin 3 connect the pin 4 of the first power transfer module in power circuit; Current sensor IC 2pin 4 connect one end of the 7th resistance; Current sensor IC 2pin 5 connect the positive pole of the first electric capacity in IGBT main circuit; Current sensor IC 2pin 6 connect the negative electrode of the first diode in IGBT main circuit and one end of the first inductance.7th resistance, the 8th resistance, the 9th resistance, the tenth resistance and the 11 resistance are connected mutually, and resistance is equal; One end of 7th resistance connects current sensor IC 2pin the 4, seven resistance the other end connect the 8th resistance; One end of 11 resistance connects the tenth resistance, the other end ground connection of the 11 resistance.12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance are connected mutually; One end of 12 resistance connects the collector of IGBT to be measured in IGBT main circuit, and the other end of the 12 resistance connects the 13 resistance; One end of 17 resistance connects the 16 resistance, and the other end of the 17 resistance connects the emitter of IGBT to be measured in IGBT main circuit; The resistance of the 16 resistance and the 17 resistance is equal, and the resistance of the 12 resistance, the 13 resistance, the 14 resistance and the 15 resistance is equal, and is 2 times of the 17 resistance.The tie point of port the 39, the 16 resistance and the 17 resistance that the tie point of the 8th resistance and the 9th resistance is connected to dsp controller is connected to the port 40 of dsp controller.Can calculate from the resistance of each resistance, the electric current and the voltage signal that are input to dsp controller are respectively 3/5 and 1/10 of actual signal.
The CPU model of described dsp controller is TMS320F28335; The voltage positive input terminal of dsp controller connects the pin 3 of second source modular converter in power circuit; Port 30 ground connection of dsp controller, so dsp controller and all the other each several part circuit are altogether; Connect the gate pole of the first triode after the port 6 of dsp controller is connected in series the 5th resistance, control the switching of the first relay; Driving chip IC is connected after the port one 6 of dsp controller is connected in series the second resistance 1pin 2, export drive pulse signal; The port 39 of dsp controller is a road AD conversion passage, and the port 39 of dsp controller connects the tie point of the 8th resistance and the 9th resistance, gathers IGBT collector current signal to be measured; The port 40 of dsp controller is another road AD conversion passage, and the port 40 of dsp controller connects the tie point of the 16 resistance and the 17 resistance, gathers the voltage signal between IGBT collector to be measured and emitter; Be integrated with EEPROM storage chip in dsp controller, model is AT24C08, and storage space 1024KB can be used for the storage of collection signal.
The course of work of the present invention is as follows: original state is that the contact 1 of the first relay is connected with contact 3, and the power supply of IGBT main circuit disconnects, and IGBT to be measured keeps turning off; First, dsp controller controls the first relay and switches, and the contact 1 of the first relay is connected with contact 2, and the power supply of IGBT main circuit is the first capacitor charging by the first resistance, duration 30s; Afterwards, dsp controller again controls the first relay and switches, and the contact 1 of the first relay is connected with contact 3, and the power supply of IGBT main circuit disconnects; After time delay 1us, dsp controller exports single actuations pulse signal, and pulsewidth 150us, opens 150us by IGBT to be measured in IGBT drive circuit control IGBT main circuit; Open period, the voltage of the first electric capacity is applied to the first inductance, generation current flows through IGBT to be measured, the escalating rate of electric current and peak value are controlled by the first inductance, AD Acquisition Circuit gathers the collector current of IGBT to be measured and the voltage signal between collector and emitter, is converted to voltage signal and is input to dsp controller, and dsp controller calculates real collector current and the voltage between collector and emitter, every 3us stores once, and coexist storage 50 groups of data; IGBT closes and has no progeny, and one time test process terminates, and start to test, testing time can be controlled by dsp controller next time; After whole test terminates, the mean value of each experimental result is obtained and is stored in EEPROM by dsp controller.
Accompanying drawing explanation
Fig. 1 is circuit structure block diagram of the present invention;
Fig. 2 is the schematic diagram of power circuit of the present invention, wherein: Fig. 2 a is the first power transfer module U 1circuit theory diagrams, Fig. 2 b is second source modular converter U 2circuit theory diagrams;
Fig. 3 is the schematic diagram of IGBT main circuit of the present invention;
Fig. 4 is the schematic diagram of IGBT drive circuit of the present invention;
Fig. 5 is the schematic diagram of invention relay circuit;
Fig. 6 is the schematic diagram of AD Acquisition Circuit, and wherein: Fig. 6 a is the schematic diagram of current collection circuit, Fig. 6 b is the schematic diagram of voltage collection circuit;
Fig. 7 is workflow diagram of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Figure 1 shows that circuit structure block diagram of the present invention.As shown in Figure 1, the present invention is made up of power circuit, IGBT main circuit, IGBT drive circuit, relay circuit, AD Acquisition Circuit and dsp controller.Power circuit connects IGBT main circuit, IGBT drive circuit, relay circuit, AD Acquisition Circuit and dsp controller respectively; IGBT drive circuit, relay circuit and AD Acquisition Circuit are in parallel, IGBT drive circuit in parallel, relay circuit are connected dsp controller with one end of AD Acquisition Circuit, and IGBT drive circuit in parallel, relay circuit are connected IGBT main circuit with the other end of AD Acquisition Circuit.
As shown in Figure 2 a and 2 b, described power circuit comprises a binary channels D.C. regulated power supply and two power transfer module.The model of binary channels D.C. regulated power supply is DH1718E-4; The passage one of binary channels D.C. regulated power supply exports+18V voltage, the negative output terminal ground connection of passage one, and connects the first power transfer module U 1pin 2 and second source modular converter U 2pin 1, the positive output end of passage one connects the first power transfer module U 1pin 1, second source modular converter U 2pin 2 and driving circuit in driving chip IC 1pin 8; The negative output terminal ground connection of binary channels D.C. regulated power supply passage two, and the voltage negative input end connecting IGBT main circuit, the positive output end of passage two connects the voltage positive input terminal of IGBT main circuit.First power transfer module U 1model be MD20-24D15, the first power transfer module U 1pin 1 connect the positive output end of binary channels D.C. regulated power supply passage one, pin 2 ground connection, and the negative output terminal connecting binary channels D.C. regulated power supply passage one; First power transfer module U 1pin 3 and pin 7 unsettled, pin 5 ground connection, pin 4 and pin 6 export+15V voltage and-15V voltage respectively; First power transfer module U 1pin 4 connect current sensor IC in AD Acquisition Circuit 2pin 3, first power transfer module U 1pin 6 connect current sensor IC in AD Acquisition Circuit 2pin 1.Second source conversion module U 2model be XZR-05, second source modular converter U 2pin 1 ground connection, and connect the negative output terminal of binary channels D.C. regulated power supply passage one, pin 2 connects the positive output end of binary channels D.C. regulated power supply passage one; Second source modular converter U 2pin 3 export+5V voltage, pin 4 is unsettled, pin 5 ground connection; Second source modular converter U 2pin 3 connect relay circuit repeat circuit U respectively 3contact 4 and the voltage positive input terminal of dsp controller.
As shown in Figure 3, voltage positive input terminal and the voltage negative input end of described IGBT main circuit are connected positive output end and the negative output terminal of binary channels D.C. regulated power supply DH1718E-4 passage two respectively; The voltage positive input terminal of described IGBT main circuit is connected in series the first resistance R 1after be connected to the first relay U 3contact 1, first relay U 3contact 2 connect the first electric capacity C dC-LINKpositive pole and current sensor IC 2pin 5, current sensor IC 2pin 6 connect the first diode D 1negative electrode and the first inductance L loadone end, the first diode D 1anode and the first inductance L loadthe other end connect the collector C of IGBT to be measured; The voltage negative input end grounding of IGBT main circuit, and connect the first electric capacity C dC-LINKnegative pole and the emitter E of IGBT to be measured.
As shown in Figure 4, in described IGBT drive circuit, driving chip IC 1model is HCNW3120, driving chip IC 1pin 1 and pin 4 unsettled; Driving chip IC 1pin 2 be connected in series the second resistance R 2the port one 6 of rear connection dsp controller; Driving chip IC 1pin 3 ground connection, and connect the port 30 of dsp controller; Driving chip IC 1pin 5 ground connection, and connect the emitter E of IGBT to be measured in IGBT main circuit; Driving chip IC 1pin 6 and pin 7 short circuit, be connected to the 3rd resistance R gone end; Driving chip IC 1pin 8 connect the positive output end of binary channels D.C. regulated power supply DH1718E-4 passage one.3rd resistance R gone end connect driving chip IC 1pin 6 and pin 7, the other end connects the grid G of IGBT to be measured in IGBT main circuit; 4th resistance R gEwith the second electric capacity C gEparallel connection, one end connects the grid G of IGBT to be measured in IGBT main circuit, and the other end connects the emitter E of IGBT to be measured.
As shown in Figure 5, described relay circuit comprises the first relay U 3, the second diode D 2, the first triode G 1with two resistance R 5and R 6.First relay U 3contact 1 connect the first resistance R in IGBT main circuit 1; First relay U 3contact 2 connect the first electric capacity C in IGBT main circuit dC-LINKpositive pole and current sensor IC 2pin 5; First relay U 3contact 3 unsettled; First relay U 3contact 4 connect second source modular converter U in power circuit 2pin 3; First relay U 3contact 5 connect the first triode G 1collector; First triode G 1gate pole serial connection the 5th resistance R 5the port 6 of rear connection dsp controller; First triode G 1emitter serial connection the 6th resistance R 6rear ground connection.
As shown in figures 6 a and 6b, described AD Acquisition Circuit comprises current sensor IC 2with 11 resistance, current sensor IC 2model be HX-50P.Current sensor IC 2pin 1 connect the first power transfer module U in power circuit 1pin 6; Current sensor IC 2pin 2 ground connection; Current sensor IC 2pin 3 connect the first power transfer module U in power circuit 1pin 4; Current sensor IC 2pin 4 connect the 7th resistance R 7one end; Current sensor IC 2pin 5 connect the first electric capacity C in IGBT main circuit dC-LINKpositive pole; Current sensor IC 2pin 6 connect the first diode D in IGBT main circuit 1negative electrode and the first inductance L loadone end.7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10with the 11 resistance R 11resistance is equal, mutually connects, the 7th resistance R 7one end connect current sensor IC 2pin the 4, seven resistance R 7the other end connect the 8th resistance R 8; 11 resistance R 11one end connect the tenth resistance R 10, the 11 resistance R 11other end ground connection.12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16with the 17 resistance R 17mutual series connection; 12 resistance R 12one end connect the collector C of IGBT to be measured in IGBT main circuit, the 12 resistance R 12the other end connect the 13 resistance R 13; 17 resistance R 17one end connect the 16 resistance R 16, the 17 resistance R 17the other end connect the emitter E of IGBT to be measured in IGBT main circuit; 16 resistance R 16with the 17 resistance R 17resistance equal, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14with the 15 resistance R 15resistance equal, and be the 17 resistance R 172 times of resistance.8th resistance R 8with the 9th resistance R 9tie point be connected to port the 39, the 16 resistance R of dsp controller 16with the 17 resistance R 17tie point be connected to the port 40 of dsp controller.Can calculate from each resistance, the electric current and the voltage signal that are input to dsp controller are respectively 3/5 and 1/10 of actual signal.
The CPU model of described dsp controller is TMS320F28335; The voltage positive input terminal of dsp controller connects second source modular converter U in power circuit 2pin 3; Port 30 ground connection of dsp controller, so dsp controller and all the other each several part circuit are altogether; The port 6 of dsp controller is connected in series the 5th resistance R 5rear connection first triode G 1gate pole, control the first relay U 3switch; The port one 6 of dsp controller is connected in series the second resistance R 2rear connection driving chip IC 1pin 2, export drive pulse signal; The port 39 of dsp controller is a road AD conversion passage, and the port 39 of dsp controller connects the 8th resistance R 8with the 9th resistance R 9tie point, gather IGBT collector current signal to be measured; The port 40 of dsp controller is another road AD conversion passage, and the port 40 of dsp controller connects the 16 resistance R 16with the 17 resistance R 17tie point, gather the voltage signal between IGBT collector C to be measured and emitter E; Be integrated with EEPROM storage chip in dsp controller, model is AT24C08, and storage space 1024KB can be used for the storage of collection signal.
As shown in Figure 7, the course of work of the present invention is as follows: original state is the first relay U 3contact 1 be connected with contact 3, the power supply of IGBT main circuit disconnects, and IGBT to be measured keeps turning off; First, dsp controller controls the first relay U 3switch, make the first relay U 3contact 1 be connected with contact 2, the power supply of IGBT main circuit is by the first resistance R 1be the first electric capacity C dC-LINKcharging, duration 30s; Afterwards, dsp controller controls the first relay U again 3switch, make the first relay U 3contact 1 be connected with contact 3, the power supply of IGBT main circuit disconnects; After time delay 1us, dsp controller exports single actuations pulse signal, and pulsewidth 150us, opens 150us by IGBT to be measured in IGBT drive circuit control IGBT main circuit; Open period, the first electric capacity C dC-LINKvoltage is applied to the first inductance L loadtwo ends, generation current flows through IGBT to be measured, and the escalating rate of electric current and peak value are by the first inductance L loadcontrol, the collector current of IGBT to be measured and the voltage signal between collector and emitter are converted into suitable voltage signal and are input to dsp controller by AD Acquisition Circuit, dsp controller calculates real collector current and the voltage between collector and emitter, every 3us stores once, and coexist storage 50 groups of data; IGBT closes and has no progeny, and one time test process terminates, and start to test, testing time can be controlled by dsp controller next time; After whole test terminates, the mean value of each test result is obtained and is stored in EEPROM by dsp controller.
According to technique scheme, the device such as electric capacity, resistance of one embodiment of the invention adopts following parameter, the first electric capacity C dC-LINKfor electrochemical capacitor, capacitance is 4700uF, withstand voltage 25V, the second electric capacity C gEfor tantalum electric capacity, capacitance is 560pF; First resistance R 1resistance be 1k, the second resistance R 2resistance be 400 Ω, the 3rd resistance R gresistance be 12 Ω, the 4th resistance R gEresistance be 10k, the 5th resistance R 5resistance be 1k, the 6th resistance R 6resistance be 100 Ω, the 7th resistance R 7resistance be 1k, the 8th resistance R 8resistance be 1k, the 9th resistance R 9resistance be 1k, the tenth resistance R 10resistance be 1k, the 11 resistance R 11resistance be 1k, the 12 resistance R 12resistance be 2k, the 13 resistance R 13resistance be 2k, the 14 resistance R 14resistance be 2k, the 15 resistance R 15resistance be 2k, the 16 resistance R 16resistance be 1k, the 17 resistance R 17resistance be 1k; First inductance L loadinductance value is 20uH; First diode D 1model be 1N5408; Second diode D 2model be 1N4148; The model of IGBT to be measured is IKW40N120T2, rated current 40A, 600V rated; IGBT main circuit power voltage Vin is+20V, then open in the 150us time at IGBT, IGBT maximum collector current is about 150A; The testing requirement of IKW40N120T2 output characteristics can be met.
The present invention can carry out 1 to 8 IGBT output characteristics test automatically, and the mean value of store test results, easy to use; Utilize inductance to control main circuit current size, test process is safer; The value of passive device in modification circuits, can meet the testing requirement of most of model IGBT output characteristics, extensibility is stronger.

Claims (7)

1. an IGBT output characteristics proving installation, is characterized in that: described proving installation comprises power circuit, IGBT main circuit, IGBT drive circuit, relay circuit, AD Acquisition Circuit and dsp controller; Described power circuit is connected with IGBT main circuit, IGBT drive circuit, relay circuit, AD Acquisition Circuit and dsp controller respectively; Described IGBT drive circuit, relay circuit and AD Acquisition Circuit are in parallel, IGBT drive circuit in parallel, relay circuit are connected dsp controller with one end of AD Acquisition Circuit, and IGBT drive circuit in parallel, relay circuit are connected IGBT main circuit with the other end of AD Acquisition Circuit.
2. according to IGBT output characteristics proving installation according to claim 1, it is characterized in that: described power circuit comprises a binary channels D.C. regulated power supply and two power transfer module; The passage one of binary channels D.C. regulated power supply exports+18V voltage; The negative output terminal ground connection of passage one, and connect the first power transfer module U 1pin 2 and second source modular converter U 2pin 1; The positive output end of passage one connects the first power transfer module U 1pin 1, second source modular converter U 2pin 2 and IGBT drive circuit in driving chip IC 1pin 8; The negative output terminal ground connection of binary channels D.C. regulated power supply passage two, and the voltage negative input end connecting IGBT main circuit, the positive output end of passage two connects the voltage positive input terminal of IGBT main circuit; First power transfer module U 1+ 18V voltage signal is converted into ± 15V voltage signal; First power transfer module U 1pin 1 connect the positive output end of binary channels D.C. regulated power supply passage one, pin 2 ground connection, and the negative output terminal connecting binary channels D.C. regulated power supply passage one; First power transfer module U 1pin 3 and pin 7 unsettled, pin 5 ground connection; First power transfer module U 1pin 4 and pin 6 export+15V and-15V voltage respectively; First power transfer module U 1pin 4 connect current sensor IC in AD Acquisition Circuit 2pin 3, first power transfer module U 1pin 6 connect current sensor IC in AD Acquisition Circuit 2pin 1; Second source conversion module U 2+ 18V voltage signal is converted into+5V voltage signal; Second source modular converter U 2pin 1 ground connection, and connect the negative output terminal of binary channels D.C. regulated power supply passage one; Second source modular converter U 2pin 2 connect the positive output end of binary channels D.C. regulated power supply passage one, pin 3 exports+5V voltage, and pin 4 is unsettled, pin 5 ground connection; Second source modular converter U 2pin 3 connect the contact 4 of relay circuit repeat circuit and the voltage positive input terminal of dsp controller respectively.
3. according to IGBT output characteristics proving installation according to claim 1, it is characterized in that: voltage positive input terminal and the voltage negative input end of described IGBT main circuit are connected positive output end and the negative output terminal of binary channels D.C. regulated power supply passage two respectively; The voltage positive input terminal of IGBT main circuit is connected in series the first resistance and is connected to the first relay U 3contact 1, first relay U 3contact 2 connect the first electric capacity C dC-LINKpositive pole and current sensor IC 2pin 5, current sensor IC 2pin 6 connect the first diode D 1negative electrode and the first inductance L loadone end, the first diode D 1anode and the first inductance L loadthe other end connect the collector C of IGBT to be measured, the voltage negative input end grounding of IGBT main circuit, and connect the first electric capacity C dC-LINKnegative pole and the emitter E of IGBT to be measured.
4., according to IGBT output characteristics proving installation according to claim 1, it is characterized in that: in described IGBT drive circuit, driving chip IC 1pin 1 and pin 4 unsettled; Driving chip IC 1pin 2 be connected in series the second resistance R 2the port one 6 of rear connection dsp controller; Driving chip IC 1pin 3 ground connection, and connect the port 30 of dsp controller; Driving chip IC 1pin 5 ground connection, and connect the emitter E of IGBT to be measured in IGBT main circuit; Driving chip IC 1pin 6 and pin 7 short circuit, be connected to the 3rd resistance R gone end; Driving chip IC 1pin 8 connect the positive output end of binary channels D.C. regulated power supply DH1718E-4 passage one; 3rd resistance R gone end connect driving chip IC 1pin 6 and pin 7, the other end connects the grid G of IGBT to be measured in IGBT main circuit; 4th resistance R gEwith the second electric capacity C gEparallel connection, one end connects the grid G of IGBT to be measured in IGBT main circuit, and the other end connects the emitter E of IGBT to be measured.
5. according to IGBT output characteristics proving installation according to claim 1, it is characterized in that: in described relay circuit, the first relay U 3contact 1 connect the first resistance R in IGBT main circuit 1; First relay U 3contact 2 connect the first electric capacity C in IGBT main circuit dC-LINKpositive pole and current sensor IC 2pin 5; First relay U 3contact 3 unsettled; First relay U 3contact 4 connect second source modular converter U in power circuit 2pin 3; First relay U 3contact 5 connect the first triode G 1collector; First triode G 1gate pole serial connection the 5th resistance R 5the port 6 of rear connection dsp controller; First triode G 1emitter serial connection the 6th resistance R 6rear ground connection.
6. according to IGBT output characteristics proving installation according to claim 1, it is characterized in that: in described AD Acquisition Circuit, current sensor IC 2pin 1 connect the first power transfer module U in power circuit 1pin 6; Current sensor IC 2pin 2 ground connection; Current sensor IC 2pin 3 connect the first power transfer module U in power circuit 1pin 4; Current sensor IC 2pin 4 connect the 7th resistance R 7one end; Current sensor IC 2pin 5 connect the first electric capacity C in IGBT main circuit dC-LINKpositive pole; Current sensor IC 2pin 6 connect the first diode D in IGBT main circuit 1negative electrode and the first inductance L loadone end; 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10with the 11 resistance R 11resistance is equal, mutually connects, the 7th resistance R 7one end connect current sensor IC 2pin the 4, seven resistance R 7the other end connect the 8th resistance R 8; 11 resistance R 11one end connect the tenth resistance R 10, the 11 resistance R 11other end ground connection; 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16with the 17 resistance R 17mutual series connection; 12 resistance R 12one end connect the collector C of IGBT to be measured in IGBT main circuit, the 12 resistance R 12the other end connect the 13 resistance R 13; 17 resistance R 17one end connect the 16 resistance R 16, the 17 resistance R 17the other end connect the emitter E of IGBT to be measured in IGBT main circuit; 16 resistance R 16with the 17 resistance R 17resistance equal, the 12 resistance R 12, the 13 resistance R 13, the 14 resistance R 14with the 15 resistance R 15resistance equal, and be the 17 resistance R 172 times of resistance; 8th resistance R 8with the 9th resistance R 9tie point be connected to port the 39, the 16 resistance R of dsp controller 16with the 17 resistance R 17tie point be connected to the port 40 of dsp controller.
7. according to IGBT output characteristics proving installation according to claim 1, it is characterized in that: described dsp controller voltage positive input terminal connects second source modular converter U in power circuit 2pin 3; Port 30 ground connection of dsp controller; The port 6 of dsp controller is connected in series the 5th resistance R 5rear connection first triode G 1gate pole, control the first relay U 3switch; The port one 6 of dsp controller is connected in series the second resistance R 2rear connection driving chip IC 1pin 2, export drive pulse signal; The port 39 of dsp controller is a road AD conversion passage, and the port 39 of dsp controller connects the 8th resistance R 8with the 9th resistance R 9tie point, gather IGBT collector current signal to be measured; The port 40 of dsp controller is another road AD conversion passage, and the port 40 of dsp controller connects the 16 resistance R 16with the 17 resistance R 17tie point, gather the voltage signal between IGBT collector C to be measured and emitter E.
CN201510983141.4A 2015-12-24 2015-12-24 IGBT output characteristic test device Pending CN105445639A (en)

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CN107329071A (en) * 2017-07-11 2017-11-07 Tcl空调器(中山)有限公司 A kind of performance test circuit, test device and the method for IGBT drivers
CN108072819A (en) * 2016-11-10 2018-05-25 西门子公司 The abatement detecting method and device of IGBT
CN110632486A (en) * 2018-06-06 2019-12-31 北京平高清大科技发展有限公司 Disassembly-free detection device for IGBT power unit
CN111929494A (en) * 2020-08-03 2020-11-13 珠海格力电器股份有限公司 Direct current bus voltage detection circuit with protection function and air conditioning system

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CN111929494A (en) * 2020-08-03 2020-11-13 珠海格力电器股份有限公司 Direct current bus voltage detection circuit with protection function and air conditioning system

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