CN108226733A - A kind of combined power cycle detector and its detection method for IGBT module - Google Patents
A kind of combined power cycle detector and its detection method for IGBT module Download PDFInfo
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- CN108226733A CN108226733A CN201611125731.4A CN201611125731A CN108226733A CN 108226733 A CN108226733 A CN 108226733A CN 201611125731 A CN201611125731 A CN 201611125731A CN 108226733 A CN108226733 A CN 108226733A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2642—Testing semiconductor operation lifetime or reliability, e.g. by accelerated life tests
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Abstract
The present invention relates to a kind of combined power cycle detector and detection method for IGBT module, detection device includes：Main power source branch, measurement power branch, the first current sensor, active control cycling element, the second current sensor and passive control loop unit in parallel；Main power source branch includes：Main power source and the master control power switch of series connection with it；Power branch is measured to include：Measure power supply and the measurement power switch of series connection with it；Active control cycling element includes：Active control branch in parallel, passive control loop unit include：Passive controlling brancher in parallel.The present invention combines the heating of IGBT module active control and passive control is heated, and extends tested module quantity；IGBT module heat temperature raising and temperature-fall period time scale are considered simultaneously, rationally designs parallel branch quantity, and peak efficiency utilizes power supply.
Description
Technical field
The present invention relates to field of power electronics, in particular to a kind of combined power cycle detection for IGBT module fills
It puts and its detection method.
Background technology
IGBT (insulated gate bipolar transistor, Insulated Gate Bipolar Transistor) is (double by BJT
Polar form triode) and MOS (insulating gate type field effect tube) composition compound full-control type voltage driven type power semiconductor, it is simultaneous
There is advantage of both the high input impedance of MOSFET and the low conduction voltage drop of power transistor GTR.GTR saturation pressures reduce, and carry
Current density is big, but driving current is larger；MOSFET driving power very littles, switching speed is fast, but conduction voltage drop is big, current carrying density
It is small.Therefore IGBT driving powers are small and saturation pressure reduces, be very suitable for DC voltage for 600V and more than converter system such as
The fields such as alternating current generator, frequency converter, Switching Power Supply, lighting circuit, Traction Drive.
From structure, IGBT module is by specific circuit bridge by igbt chip and FWD (fly-wheel diode chip)
Connect the modularized semiconductor product that encapsulation forms；IGBT module after encapsulation directly applies to frequency converter, UPS uninterruptible power supplies etc.
In equipment；The voltage specification of IGB modules and the electric supply voltage of input power i.e. examination of institute's use device are closely related.
IGBT module has the characteristics that energy saving, convenient to install and maintain, heat dissipation is stablized；That is sold on Vehicles Collected from Market is mostly such
Modular product, general described IGBT also refer to IGBT module；As the theories such as energy conservation and environmental protection are gradually deepened, such product by
User favors.
With the fast development of IGBT technologies in recent years, the gradual promotion of voltage, current class, in electric system
Using also more and more extensive, the special application environment of electric system also proposed some particular/special requirements to the device of IGBT：High pressure,
High current, high reliability etc..Research shows that when IGBT repeats open, turn off, junction temperature big ups and downs, under Thermal Stress effect
Fatigue effect or failure will be generated, due to the normal operation that its working life and reliability will influence whole device or system,
Since fatigue effect is a long process, so proposing higher requirement to the reliability of IGBT module.
The maximum of existing power cycle detection platform detects electric current as 1500A in the market, while the number of modules detected
Number is up to 3, and the IGBT current classes in electric system application be up to 3000A and more than, have power cycle detection
Platform can not meet the detection demand of electric system application.
Invention content
To solve above-mentioned deficiency of the prior art, the purpose of the present invention is to provide a kind of mixing for IGBT module
Power cycle detection device and detection method.
Wherein detection device includes：The main power source branch of parallel connection measures power branch, the first current sensor, actively controls
Cycling element processed, the second current sensor and passive control loop unit；Main power source branch includes：Main power source and series connection with it
Master control power switch；Power branch is measured to include：Measure power supply and the measurement power switch of series connection with it；Active control cycle is single
Member includes：Active control branch in parallel, active control branch include：The pulse power being connected with IGBT grids, the pulse power
The other end be connected with the emitter of IGBT；Passive control loop unit includes：Passive controlling brancher in parallel, passive control branch
Road includes：The constant pressure source being connected with IGBT grids and the switch connected with IGBT, the other end of constant pressure source and the emitter of IGBT
It is connected.
Active control cycling element includes being at least two active control branches in parallel；IGBT is equipped in active control branch
Module.
Passive control loop unit includes at least two passive controlling branchers in parallel；It is equipped with extremely in passive controlling brancher
The IGBT module of few two series connection.The grid of IGBT is connected through resistance with the pulse power in IGBT module, the pulse power it is another
End is connected with the emitter of IGBT, and IGBT module is in parallel with voltmeter.
The grid of IGBT is connected through resistance with 15V constant pressure sources in IGBT module, the other end of 15V constant pressure sources and the hair of IGBT
Emitter-base bandgap grading is connected, and IGBT module is in parallel with voltmeter.IGBT module also with for recording the parallel thermocouple of IGBT module shell temperature.
Combined power cycle detector further includes：Host computer, for the pulse power to be controlled to make active control cycling element
IGBT module cycle it is open-minded.
Open and the turn-off time ratio of IGBT module are 1：N, wherein, N is the integer more than 1.Temporally than setting actively
Parallel branch number in control loop unit and passive control loop unit.
Two current sensors test the electric current in active control cycling element and passive control loop unit respectively.
For the detection method of combined power cycle detector, including step：1) master control power switch, heating are closed
IGBT module in branch；2) after IGBT module reaches predetermined temperature, the master control power switch disconnects；3) it is closed and measures power supply
Switch tests IGBT module both end voltage；4) the measurement power switch is disconnected, is closed the master control power switch；5) successively
The IGBT module of other branch roads of circulating-heating.
Step 1) includes：The IGBT of main power source branch road in PC control pulse power heating active control cycling element
Module；Or the switch in passive control loop unit on passive controlling brancher is closed, constant pressure source is heated on passive controlling brancher
IGBT module.
When heating and measure every time, the branch in the active control unit and the passive control unit only has one to lead
It is logical.
Compared with the immediate prior art, technical solution provided by the invention has the advantages that：
1) single IGBT module is combined by the present invention with IGBT module Series power cycle detector, can be completed simultaneously
Multigroup modular power cycle detection；
2) present invention combines the heating in power cycle detection and temperature fall time ratio, designs parallel branch number, efficiently utilizes
Power supply saves detection time；
3) present invention carries out real time on-line monitoring to the voltage of each tested module, electric current, junction temperature and shell temperature etc., is lost for the later stage
Effect analysis and life model provide foundation；
4) present invention combines the heating of IGBT module active control and passive control is heated, and extends tested module quantity；Simultaneously
Consider IGBT module heat temperature raising and temperature-fall period time scale, rationally design parallel branch quantity, peak efficiency utilizes power supply；
5) present invention is heating the quick detection module of ending phase every time simultaneously in one detection power supply of main power source loong shunt
Junction temperature, realize IGBT module power cycle in Δ T accurate recordings and thermal resistance calculation.
Description of the drawings
Fig. 1 is the high-power IGBT module combined power cycle detection main loop circuit figure of the present invention；
Fig. 2 is that the IGBT module of the invention temperature in power cycle experiment changes over time rule figure.
Specific embodiment
The specific embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.
The present invention to examine multiple IGBT modules simultaneously, premised on obtaining accurate failure analysis and Q-percentile life prediction, mould
Intend power cycle detection platform.
High-power IGBT module combined power cycle detection main loop circuit as shown in Figure 1, mainly including main power source, survey
Measure power supply, current sensor, active control cycling element, passive control loop unit.
The operation principle of the present invention：In power cycle detection, dissipated using the heating of IGBT module self-heating and external forced
Heat drop temperature, main power source are regulated power supply, there is multiple power gears, when individual module detects in active control cycling element,
PC control regulated power supply exports small-power；In multimode Series detectors, the output of PC control regulated power supply is high-power,
It can power simultaneously for individual module and multimode Series detectors.
The switch of master control power switch S1 (using high-current relay) control heating power supply, is completed in a branch heating
After disconnect, the switch S2 (using signal relay) for measuring power supply is closed and is tested and (completed in 1ms), and S2 breaks after the completion of test
It opens, then S1, which is reclosed, heats the IGBT module of other branch roads, recycles successively.
Detection method：Master control power supply carries out conducting heating to the IGBT module on a branch (such as N1), predetermined reaching
After temperature, master control power switch S1 is cut off, is closed and measures power switch S2 and to measure its IGBT module both end voltage (complete in 1ms
Into), S2 is disconnected after the completion of test；Then master control power switch S1 is reclosed, and into the heating cycle of next IGBT module, is led to
It crosses host computer and controls N2 successively ... Nn, Q1 ... Qy and carry out conducting heating.
Switching S1 and S2 on off states, there are two principles：1) S1 and S2 are not simultaneously turned on；2) when heating and measure every time only
A branch is accessed, i.e., an only branch is connected in all active control units and passive control unit branch same time.
The current value in active control cycling element and passive control loop unit is tested respectively with two current sensors.
The characteristics of both end voltage is low in heating process using high-power IGBT module, multiple modules of connecting passively are being controlled
Cycling element processed includes the branch of n items parallel connection, and every branch routing switch Qi and n tested IGBT module Mi1, Mi2 ... Min goes here and there
Connection is formed by connecting, wherein the grid of each tested IGBT module adds 15V driving powers, it is made to be constantly in the detection and opens shape
State, by switch the turning on and off come controlling brancher in each branch：The stage is opened in connecting thus eliminating the need multimode
Voltage-sharing ensures the consistency of the electrical stress of tested module.
Active control cycling element is composed in parallel by n branch N1 ... Nn, and every branch is all provided with that there are one tested IGBT
Module is tested the pulse power of IGBT module in detection process by PC control, realizes the cycle of tested IGBT module
Open-minded, each stage only has an active control circulation branch road to be in opening state, realizes tested IGBT module cycle heating
And cooling.
And in active power cycle detection, it is turned on and off by tested module from control.Passive control loop and active
Difference lies in the tested IGBT modules in passive control loop unit to be constantly in opening state, and have multiple for control loop
IGBT module is connected, and branch where being controlled by branch switch turns on and off, and every branch of active cycle control unit is all only
There are one tested IGBT module, by being tested turning on and off for IGBT module oneself active control branch.
15V constant pressure sources and pulse are all the driving powers of IGBT module, and 15V is to ensure that IGBT module is in opening state,
Pulse is then the square wave driving pulse of 15V, IGBT module is controlled to turn on and off as needed；In the work(of small-power IGBT module
Both modes have application in rate cycle detection, but consider power in high-power IGBT modular power cycle detection
Limited, the two is used in mixed way.
By the way that setting is driven to be opened by tested IGBT module from control, turns off to realize IGBT module in detection process
Heating and cooling.
As temperature changes over time rule it is found that the heat temperature raising time is smaller than in the IGBT module power cycle in Fig. 2
Temperature fall time, its ratio be 1：N based on this ratio, is set accordingly simultaneously in active control unit and passive control unit
Join circuitry number, power supply is utilized to reach most efficient.
Detection power of the IGBT module in power cycle experiment, service time, the turn-off time is all by numerical computations
It is obtained with emulation, because heating power is more than heat radiation power, when ensureing same time difference Δ T, heating time is short
In temperature fall time, its ratio be 1：N, and to ensure that the same time only has a branch in a power cycle detection device
Conducting, therefore rational parallel branch number is set, it most can efficiently utilize power supply.
Thermocouple and voltmeter, the mild device both ends electricity of implementation record module case are equipped under the radiator of each module
It presses, and measures power work after the shutdown of heating main power source every time, using low current detection method, i.e., lead in by IGBT survey modules
After the electric current of one 10mA and the tested IGBT module both end voltage of detection, compare to obtain with pressure drop-temperature curve of IGBT module
Current junction temperature, above-mentioned data all will in real time be recorded by host computer.
A kind of schematic diagram of high-power IGBT module combined power cycle detection method major loop is only provided in illustration, herein
According to specific exemplary embodiment, invention has been described.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Pipe is described in detail the present invention with reference to above-described embodiment, those of ordinary skills in the art should understand that：Still
The specific embodiment of the present invention can be modified or replaced equivalently, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement should all cover within the claims of the present invention.
Claims (12)
1. a kind of combined power cycle detector for IGBT module, which is characterized in that including：Main power source branch in parallel
Road measures power branch, active control cycling element and passive control loop unit；
The main power source branch includes：Main power source and the master control power switch of series connection with it；
The measurement power branch includes：Measure power supply and the measurement power switch of series connection with it；
The active control cycling element includes：Active control branch in parallel, the active control branch include：With IGBT grid
Extremely the connected pulse power, the other end of the pulse power are connected with the emitter of IGBT；
The passive control loop unit includes：Passive controlling brancher in parallel, the passive controlling brancher include：With IGBT grid
Extremely connected constant pressure source and the switch connected with IGBT, the other end of the constant pressure source is connected with the emitter of IGBT.
2. combined power cycle detector as described in claim 1, which is characterized in that
The active control cycling element includes being at least two active control branches in parallel；It is equipped in the active control branch
IGBT module.
3. combined power cycle detector as described in claim 1, which is characterized in that
The passive control loop unit includes at least two passive controlling branchers in parallel；It is set in the passive controlling brancher
There is the IGBT module of at least two series connection.
4. combined power cycle detector as claimed in claim 2, which is characterized in that
The grid of IGBT is connected through resistance with the pulse power in the IGBT module, the other end of the pulse power and IGBT's
Emitter is connected, and the IGBT module is in parallel with voltmeter.
5. combined power cycle detector as claimed in claim 3, which is characterized in that
The grid of IGBT is connected through resistance with 15V constant pressure sources in the IGBT module, the other end and IGBT of the 15V constant pressure sources
Emitter be connected, the IGBT module is in parallel with voltmeter.
6. combined power cycle detector as described in claim 4 or 5, which is characterized in that the IGBT module also with
In the parallel thermocouple of record IGBT module shell temperature.
7. combined power cycle detector as claimed in claim 6, which is characterized in that further include：
Host computer, for controlling the cycle that the pulse power makes the IGBT module of the active control cycling element open-minded.
8. combined power cycle detector as claimed in claim 7, which is characterized in that the IGBT module being opened and closing
Disconnected time ratio is 1：N, wherein, N is the integer more than 1.
9. combined power cycle detector as claimed in claim 8, which is characterized in that by the time than setting the master
Parallel branch number in dynamic control loop unit and the passive control loop unit.
10. combined power cycle detector as described in claim 1, which is characterized in that
It is equipped with to measure the active control cycling element between the measurement power branch and the active control cycling element
First current sensor of electric current；
It is equipped with to measure in the passive control loop unit between active control cycling element and passive control loop unit
Second current sensor of electric current.
11. a kind of side of combined power cycle detector detection IGBT module using as described in claims 1 to 10 is any
Method, which is characterized in that include the following steps：
1) it when the master control power switch is in closed state, the measurement power supply is off, heats in branch
IGBT module；
2) after IGBT module reaches predetermined temperature, the master control power switch disconnects, is closed measurement power switch, tests IGBT moulds
Block both end voltage；
3) the measurement power switch is disconnected, is closed the master control power switch；
4) recycle successively 1)~3) heat the IGBT modules of other branch roads.
12. method as claimed in claim 11, which is characterized in that the IGBT module in the heating branch, including：
The IGBT module of main power source branch road in PC control pulse power heating active control cycling element；Or
The switch on passive controlling brancher in passive control loop unit is closed, constant pressure source heats the IGBT on passive controlling brancher
Module.
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| CN201611125731.4A CN108226733B (en) | 2016-12-09 | 2016-12-09 | Hybrid power cycle detection device for IGBT module and detection method thereof |
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| CN201611125731.4A CN108226733B (en) | 2016-12-09 | 2016-12-09 | Hybrid power cycle detection device for IGBT module and detection method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109507501A (en) * | 2018-11-12 | 2019-03-22 | 广东美的制冷设备有限公司 | The power circulation test method, apparatus of intelligent power module |
| WO2020087928A1 (en) * | 2018-10-28 | 2020-05-07 | 北京工业大学 | Power cycle experiment device for automotive-grade igbt multi-junction temperature difference control |
| CN113092897A (en) * | 2021-03-16 | 2021-07-09 | 荣信汇科电气股份有限公司 | Temperature fatigue aging comprehensive test device for MMC flexible direct converter valve power module |
| CN113561778A (en) * | 2021-06-29 | 2021-10-29 | 国网天津市电力公司电力科学研究院 | Electric automobile IGBT power module overheating and power circulation control method |
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| CN113561778A (en) * | 2021-06-29 | 2021-10-29 | 国网天津市电力公司电力科学研究院 | Electric automobile IGBT power module overheating and power circulation control method |
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