CN108663583A - A kind of power device electric stress test system and method - Google Patents
A kind of power device electric stress test system and method Download PDFInfo
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- CN108663583A CN108663583A CN201810165117.3A CN201810165117A CN108663583A CN 108663583 A CN108663583 A CN 108663583A CN 201810165117 A CN201810165117 A CN 201810165117A CN 108663583 A CN108663583 A CN 108663583A
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- power tube
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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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
Abstract
The invention discloses a kind of power device electric stress to test system and method, apply in multitube parallel circuit, multitube parallel circuit includes multiple power tube groups parallel with one another, high_voltage isolation probe obtains the overshoot voltage of measured power pipe group, current probe obtains the electric current of measured power pipe group, stress acquiring unit obtains the voltage stress of measured power pipe group in operating status, and leakage inductance computing unit calculates acquisition system leakage inductance.Technical scheme of the present invention can accurate record power pipe voltage stress and reverse recovery current characteristic, whether parallel transistor stable state when evaluating alternate continuous current circuit flow unanimously from judging three-phase current afterflow situation.
Description
Technical field
The present invention relates to Motor Control Field more particularly to a kind of power device electric stress applying to multitube parallel circuit
Test system and method.
Background technology
With universal, the motor control for pure electric automobile of the development of new-energy automobile, especially pure electric automobile
The research of device is extremely important.The inverter circuit of electric machine controller generally use Multiphase Parallel in the prior art carries out motor control
System.It is therefore desirable to the voltage stress of the device to Multiphase Parallel circuit and three-phase current afterflow situation to be tested and be improved.
It is according to Fig.5, single-phase in the prior art there is only the technical solution that single-phase power pipe circuit carries out stress test
Power transistor circuits include upper tube M01 and down tube M02, and load L0 is connected in parallel on upper tube both ends, and the control of upper tube M01 terminates a negative pressure
Source inputs pwm control signal to down tube M02, and down tube M02 is measured tube, respectively the control signal of test down tube M02 inputs, two
Terminal voltage, current value carry out stress test.
But the gate electrode drive signals of the top tube and down tube of existing electric machine controller are complementary, the input letters of upper tube
Number it is not low level state always, when the power device of upper tube is field-effect tube, two poles that existing testing scheme obtains
Pipe characteristic cannot meet actual conditions, and existing testing scheme cannot reflect the electric current between Multiphase Parallel power tube phase and phase
Switch instances.
Invention content
For prior art above problem present in Motor Control Field, a kind of power device electric stress survey is now provided
Test system and method.
Specific technical solution is as follows：
A kind of power device electric stress test system, applies in the multitube parallel circuit of electric machine controller, the multitube
Parallel circuit includes multiple power tube groups parallel with one another and a constant pressure source, the power tube group include a measured power pipe group and
At least one control power tube group；
The cathode of the constant pressure source connects first node, the anode connection second node of the constant pressure source；
Each power tube group includes upper power tube and lower power tube, the source electrode connection described first of the lower power tube
Node, the drain electrode of the lower power tube connect load node, and the source electrode of the upper power tube connects the load node, it is described on
The drain electrode of power tube connects second node；
The input terminal of the lower power tube of the control power tube group connects a negative pressure source, each power tube group
It is parallel with load device between the load node；
The power device electric stress tests system：
PWM signal generation unit is separately connected the control terminal, described by measurement of power of the upper power tube of the measured power pipe group
The control terminal of the upper power tube of the control terminal of the lower power tube of rate pipe group, each control power tube group；
First high_voltage isolation is popped one's head in, and the upper power tube of the measured power pipe group is connected, for obtaining the measured power
The collector voltage of the upper power tube of pipe group；
Second high_voltage isolation is popped one's head in, and the lower power tube of the measured power pipe group is connected, for obtaining the measured power
The collector voltage of the lower power tube of pipe group；
Current probe connects the source electrode of the lower power tube of the measured power pipe group, for obtaining by described by measurement of power
The electric current of the lower power tube of rate pipe group；
Stress acquiring unit is separately connected the first high_voltage isolation probe and second high_voltage isolation probe, is used for
The voltage stress that the voltage taken obtains the upper power tube of the measured power pipe group, root are visited according to first high_voltage isolation probe
The voltage stress that the voltage taken obtains the lower power tube of the measured power pipe group is visited according to second high_voltage isolation probe；
Leakage inductance computing unit connects the stress acquiring unit, the current probe, is visited according to first high_voltage isolation
Head, the second high_voltage isolation probe and current probe visit the test data taken, calculate acquisition system leakage inductance.
Preferably, power device electric stress test system further includes condition adjudgement unit, is separately connected the pwm signal production
It is defeated to control the PWM signal generation unit for visiting the electric current taken according to the current probe for raw unit and the current probe
Go out pwm signal so that the multitube parallel circuit is in operating status, the operating status current probe spy takes
Electric current is the operating current of the multitube parallel circuit.
Preferably, power device electric stress test system further includes equal stream mode unit, connects the current probe, is used for
The stable state for obtaining the measured power pipe group flows.
Preferably, the load device is inductive load.
Preferably, the multitube parallel circuit is two-phase inverter circuit or three-phase inverting circuit.
Preferably, the power tube is N-channel field-effect tube, and the control terminal is the grid of the N-channel field-effect tube
Pole.
Preferably, the power tube is IGBT single tubes, and the control terminal is the grid of the IGBT single tubes.
Preferably, upper power tube and the measured power of the PWM signal generation unit to the measured power pipe group
The lower power tube of pipe group inputs pwm signal complementary other than dead zone, and the dead zone is that high level keeps one when being transferred to low level
The low level state of preset time keeps the low level state of the preset time when low level is transferred to high level；
Upper power tube input high level signal of the PWM signal generation unit to the control power tube group.
Preferably, the current probe is using current probe made of Rogowski coil.
Preferably, a kind of power device electric stress test method is surveyed for any of the above-described power device electric stress
Test system includes the following steps：
Step S1：The lower power tube input of upper power tube and the measured power pipe group to the measured power pipe group exists
Complementary pwm signal other than dead zone, to the upper power tube input high level signal of the control power tube group；
Step S2：The electric current for the lower power tube for taking the measured power pipe group is visited in real time, and judges the multitube parallel electricity
Whether road is in operating status；
If so, entering step S3；If it is not, then returning to the step S2；
Step S3：The collector voltage for the upper power tube for taking measured power pipe group is visited as the upper of the measured power pipe group
The voltage stress of power tube visits the collector voltage for the lower power tube for taking measured power pipe group as the measured power pipe group
The voltage stress of lower power tube；
Step S4：Using leakage inductance computing unit according to the electric current of the lower power tube of the measured power pipe group, described tested
The voltage stress of the upper power tube of power tube group, the measured power pipe group lower power tube voltage stress, formula Ls=Δs
V/ (di/dt) calculates acquisition system leakage inductance, and Ls is the system leakage inductance in the formula, and Δ V is voltage stress, and di/dt is steady
State flows.
Above-mentioned technical proposal has the following advantages that or advantageous effect：
The state consistency of the normal operation of the multitube parallel circuit of technical solution using the present invention and electric machine controller, can
With the voltage stress and reverse recovery current characteristic of accurate record power pipe, it can be estimated that go out parallel transistor when alternate continuous current circuit
Whether stable state flows unanimously from three-phase current afterflow situation is judged, the data that technical scheme of the present invention test obtains can be power
The type selecting of pipe provides foundation.
Description of the drawings
With reference to appended attached drawing, more fully to describe the embodiment of the present invention.However, appended attached drawing be merely to illustrate and
It illustrates, and is not meant to limit the scope of the invention.
Fig. 1 is the electrical block diagram that power device electric stress of the present invention tests system embodiment；
Fig. 2 is the overall structure diagram that power device electric stress of the present invention tests system embodiment；
Fig. 3 is the waveform diagram for the signal that PWM signal generation unit exports in the embodiment of the present invention；
Fig. 4 is the flow chart of power device electric stress test method embodiment of the present invention；
Fig. 5 is the electrical block diagram that single-phase power pipe circuit carries out electric stress test in the prior art.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of not making creative work it is all its
His embodiment, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The invention will be further described in the following with reference to the drawings and specific embodiments, but not as limiting to the invention.
In a kind of preferred embodiment of the present invention, according to Fig. 1 and Fig. 2, a kind of power device electric stress test system,
It is characterized in that, applying in the multitube parallel circuit of electric machine controller, multitube parallel circuit includes multiple work(parallel with one another
Rate pipe group and a constant pressure source U0, power tube group include a measured power pipe group and at least one control power tube group
The cathode of constant pressure source U0 connects first node N1, the anode connection second node N2 of constant pressure source；
Each power tube group includes upper power tube and lower power tube, and the source electrode of lower power tube connects first node N1, lower work(
The drain electrode of rate pipe connects load node N31 or load node N32, the source electrode connection load node N31 or load section of upper power tube
Point N32, the drain electrode connection second node N2 of upper power tube；
The input terminal for controlling the lower power tube M4 of power tube group connects a negative pressure source U1, the load node of each power tube group
Between be parallel with load device L；
Power device electric stress tests system：
PWM signal generation unit 1 is separately connected control terminal, the measured power pipe of the upper power tube M1 of measured power pipe group
The control terminal of the upper power tube M3 of the control terminal of the lower power tube M2 of group, each control power tube group；
First high_voltage isolation probe 51, connects the upper power tube M1 of measured power pipe group, for obtaining measured power pipe group
Upper power tube M1 collector voltage；
Second high_voltage isolation probe 52, connects the lower power tube M2 of measured power pipe group, for obtaining measured power pipe group
Lower power tube M2 collector voltage；
Current probe 6 connects the source electrode of the lower power tube M2 of measured power pipe group, passes through measured power pipe group for obtaining
Lower power tube M2 electric current；
Stress acquiring unit 3 is separately connected the first high_voltage isolation probe 51 and the second high_voltage isolation probe 52, is used for basis
First high_voltage isolation probe 51 visits the voltage stress that the voltage taken obtains the upper power tube M1 of measured power pipe group, high according to second
Pressure isolation probe 52 visits the voltage stress that the voltage taken obtains the lower power tube M2 of measured power pipe group；
Leakage inductance computing unit 7, connection stress acquiring unit 3, current probe 6, according to the first high_voltage isolation probe 51, second
High_voltage isolation probe 52 and current probe spy take 6 test data, calculate acquisition system leakage inductance.
Specifically, in the present embodiment, the control of multiple power tubes parallel connection of electric machine controller is constituted using multitube parallel circuit
Circuit processed.In said program, take multitube parallel electric using high_voltage isolation probe 51 and high_voltage isolation probe 52 and the spy of current probe 6
Simulating signal when working normally, the data source as stress test in road.Using stress acquiring unit 3 according to high_voltage isolation
Probe 51 and high_voltage isolation probe 52 visit the voltage stress and reverse recovery current characteristic for taking each power tube of signal acquisition.Using
The stable state that leakage inductance computing unit 7 is obtained according to stress acquiring unit 3 and current probe 6 flows di/dt and overshoot voltage Δ V is calculated
Acquisition system leakage inductance Ls, the calculation formula of system leakage inductance are：Ls=Δs V/ (di/dt).
In a kind of preferred embodiment of the present invention, it further includes condition adjudgement unit 2 that power device electric stress, which tests system, point
Not Lian Jie PWM signal generation unit 1 and current probe 6, for visiting the electric current that takes according to current probe 6, control pwm signal generates
For 1 output pwm signal of unit so that multitube parallel circuit is in operating status, operating status is that current probe 6 visits the electric current taken
For the operating current of multitube parallel circuit.
Specifically, in the present embodiment, in the control input circuit of condition adjudgement unit 2 and PWM signal generation unit 1
Pwm control signal is to control the state of multitube parallel circuit and the state consistency of normal operation.Said program realizes test
The data of acquisition are that multitube parallel circuit is simulating signal when working normally, and ensure that the accuracy of test data.
In a kind of preferred embodiment of the present invention, it also further includes equal stream mode unit 4 that power device electric stress, which tests system,
Current probe 6 is connected, the stable state for obtaining measured power pipe group flows.
Specifically, in the present embodiment, signal acquisition stable state is taken to flow according to the spy of current probe 6 using equal stream mode unit 4,
To judge three-phase current afterflow situation.
In a kind of preferred embodiment of the present invention, according to Fig. 1, load device L is inductive load.
Specifically, in the present embodiment, load device L is connected in parallel between load node N31 and load node N32.
In a kind of preferred embodiment of the present invention, multitube parallel circuit is two-phase inverter circuit or three-phase inverting circuit.
Specifically, in this implementation, two-phase inverter circuit includes a measured power pipe group and a control power tube group；Three contraries
It includes a measured power pipe group and two control power tube groups to become circuit.
In a kind of preferred embodiment of the present invention, power tube is N-channel field-effect tube, and control terminal is N-channel field-effect
The grid of pipe.
In a kind of preferred embodiment of the present invention, power tube is IGBT single tubes, and control terminal is the grid of IGBT single tubes.
In a kind of preferred embodiment of the present invention, upper power tube M1 from PWM signal generation unit 1 to measured power pipe group and
The lower power tube M2 of measured power pipe group inputs pwm signal complementary other than dead zone, when dead zone is that high level is transferred to low level
The low level state for keeping a preset time keeps the low level state of preset time when low level is transferred to high level；
Upper power tube M3 input high level signal of the PWM signal generation unit 1 to control power tube group.
Specifically, in the present embodiment, prevent the upper power tube M1 of measured power pipe group and lower power tube M2 straight using dead zone
It is logical, due to a kind of actual electric machine controller the control signal inputted to power tube in when be provided with dead zone, thus
The normal operating conditions that multitube parallel circuit can more accurately be simulated using the above scheme, so that power device electricity is answered
Force test system test obtains the accurate data of root.To control using to the upper power tube M3 input high levels of control power tube group
The upper power tube M3 of power tube group processed is in the conduction state.
According to Fig.3, waveform L1 is the pwm pulse signal inputted to the upper power tube of measured power pipe group, waveform L2
For the pwm pulse signal inputted to the lower power tube of measured power pipe group, waveform L3 is the upper power tube to control power tube group
The pwm pulse signal of output.
For waveform L1 and waveform L2 for complementary pwm pulse signal and there are dead zone, realizing prevents the upper of measured power pipe
The lower upper power tube of power tube and measured power pipe is straight-through.
In a kind of preferred embodiment of the present invention, current probe 6 is using current probe made of Rogowski coil.
In a kind of preferred embodiment of the present invention, according to Fig.4, a kind of power device electric stress test method is used for
Any of the above-described power device electric stress tests system, includes the following steps：
Step S1：The lower power tube of upper power tube and measured power pipe group to measured power pipe group inputs other than dead zone
Complementary pwm signal, to the upper power tube input high level signal of control power tube group；
Step S2：The electric current for the lower power tube for taking measured power pipe group is visited in real time, and judges whether multitube parallel circuit is located
In operating status；
If so, entering step S3；If it is not, then return to step S2；
Step S3：Visit upper power of the collector voltage for the upper power tube for taking measured power pipe group as measured power pipe group
The voltage stress of pipe visits lower power tube of the collector voltage for the lower power tube for taking measured power pipe group as measured power pipe group
Voltage stress；
Step S4：Electric current, measured power pipe group using leakage inductance computing unit according to the lower power tube of measured power pipe group
The voltage stress of upper power tube, measured power pipe group lower power tube voltage stress, formula Ls=Δs V/ (di/dt), meter
Acquisition system leakage inductance is calculated, Ls is the system leakage inductance in formula, and Δ V is voltage stress, and di/dt is that stable state flows.
Specifically, it in the present embodiment, adopts and multitube parallel circuit is tested with the aforedescribed process, to realize acquisition power
The electric stress of device and the system leakage inductance of circuit.
The foregoing is merely preferred embodiments of the present invention, are not intended to limit embodiments of the present invention and protection model
It encloses, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Equivalent replacement and obviously change obtained scheme, should all be included within the scope of the present invention.
Claims (10)
1. a kind of power device electric stress tests system, which is characterized in that apply in the multitube parallel circuit of electric machine controller,
The multitube parallel circuit includes multiple power tube groups parallel with one another and a constant pressure source, and the power tube group includes one by measurement of power
Rate pipe group and at least one control power tube group；
The cathode of the constant pressure source connects first node, the anode connection second node of the constant pressure source；
Each power tube group includes upper power tube and lower power tube, and the source electrode of the lower power tube connects the first segment
The drain electrode of point, the lower power tube connects load node, and the source electrode of the upper power tube connects the load node, the upper work(
The drain electrode of rate pipe connects second node；
The input terminal of the lower power tube of the control power tube group connects a negative pressure source, and each the power tube group is described
Load device is parallel between load node；
The power device electric stress tests system：
PWM signal generation unit is separately connected the control terminal of the upper power tube of the measured power pipe group, the measured power pipe
The control terminal of the upper power tube of the control terminal of the lower power tube of group, each control power tube group；
First high_voltage isolation is popped one's head in, and the upper power tube of the measured power pipe group is connected, for obtaining the measured power pipe group
Upper power tube collector voltage；
Second high_voltage isolation is popped one's head in, and the lower power tube of the measured power pipe group is connected, for obtaining the measured power pipe group
Lower power tube collector voltage；
Current probe connects the source electrode of the lower power tube of the measured power pipe group, passes through the measured power pipe for obtaining
The electric current of the lower power tube of group；
Stress acquiring unit is separately connected the first high_voltage isolation probe and second high_voltage isolation probe, is used for basis
The first high_voltage isolation probe visits the voltage stress that the voltage taken obtains the upper power tube of the measured power pipe group, according to institute
It states the second high_voltage isolation probe and visits the voltage stress that the voltage taken obtains the lower power tube of the measured power pipe group；
Leakage inductance computing unit connects the stress acquiring unit, the current probe, popped one's head according to first high_voltage isolation,
Second high_voltage isolation is popped one's head in and current probe visits the test data taken, calculates acquisition system leakage inductance.
2. power device electric stress according to claim 1 tests system, which is characterized in that further include condition adjudgement list
Member is separately connected the PWM signal generation unit and the current probe, for visiting the electric current taken according to the current probe,
The PWM signal generation unit output pwm signal is controlled so that the multitube parallel circuit is in operating status, the operation
State is the operating current that the current probe visits that the electric current taken is the multitube parallel circuit.
3. power device electric stress according to claim 2 tests system, which is characterized in that further include equal stream mode list
Member connects the current probe, and the stable state for obtaining the measured power pipe group flows.
4. power device electric stress according to claim 1 tests system, which is characterized in that the load device is perception
Load.
5. power device electric stress according to claim 1 tests system, which is characterized in that the multitube parallel circuit is
Two-phase inverter circuit or three-phase inverting circuit.
6. power device electric stress according to claim 1 tests system, which is characterized in that the power tube is N ditches
Road field-effect tube, the control terminal are the grid of the N-channel field-effect tube.
7. power device electric stress according to claim 1 tests system, which is characterized in that the power tube is IGBT
Single tube, the control terminal are the grid of the IGBT single tubes.
8. power device electric stress according to claim 1 tests system, which is characterized in that the pwm signal generates single
Member inputs complementary other than dead zone to the upper power tube of the measured power pipe group and the lower power tube of the measured power pipe group
Pwm signal, the dead zone is the low level state that high level keeps a preset time when being transferred to low level, is transferred in low level
The low level state of the preset time is kept when high level；
Upper power tube input high level signal of the PWM signal generation unit to the control power tube group.
9. power device electric stress according to claim 1 tests system, which is characterized in that the current probe uses sieve
Current probe made of family name's coil.
10. a kind of power device electric stress test method, for the power device electric stress as described in any in claim 3-9
Test system, includes the following steps：
Step S1：The lower power tube of upper power tube and the measured power pipe group to the measured power pipe group inputs in dead zone
Complementary pwm signal in addition, to the upper power tube input high level signal of the control power tube group；
Step S2：The electric current for the lower power tube for taking the measured power pipe group is visited in real time, and judges that the multitube parallel circuit is
It is no in operating status；
If so, entering step S3；If it is not, then returning to the step S2；
Step S3：Visit upper power of the collector voltage for the upper power tube for taking measured power pipe group as the measured power pipe group
The voltage stress of pipe visits lower work(of the collector voltage for the lower power tube for taking measured power pipe group as the measured power pipe group
The voltage stress of rate pipe；
Step S4：Electric current, the measured power using leakage inductance computing unit according to the lower power tube of the measured power pipe group
The voltage stress of the upper power tube of pipe group, the measured power pipe group lower power tube voltage stress, formula Ls=Δs V/
(di/dt), acquisition system leakage inductance is calculated, Ls is the system leakage inductance in the formula, and Δ V is voltage stress, and di/dt is stable state
Flow.
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| CN112684318A (en) * | 2020-12-17 | 2021-04-20 | 聚辰半导体股份有限公司 | Bootstrap type half-bridge driver common-mode voltage change rate tolerance testing device and method |
| CN113092979A (en) * | 2021-04-16 | 2021-07-09 | 全球能源互联网研究院有限公司 | MMC working condition power semiconductor device test circuit and control method |
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| CN110456201B (en) * | 2019-08-21 | 2022-02-25 | 南方电网科学研究院有限责任公司 | Power cycle acceleration test device of MMC sub-module and control method thereof |
| CN112684318A (en) * | 2020-12-17 | 2021-04-20 | 聚辰半导体股份有限公司 | Bootstrap type half-bridge driver common-mode voltage change rate tolerance testing device and method |
| CN113092979A (en) * | 2021-04-16 | 2021-07-09 | 全球能源互联网研究院有限公司 | MMC working condition power semiconductor device test circuit and control method |
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