CN109709464A - A kind of compression joint type IGBT detecting circuit for performance - Google Patents
A kind of compression joint type IGBT detecting circuit for performance Download PDFInfo
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- CN109709464A CN109709464A CN201811240386.8A CN201811240386A CN109709464A CN 109709464 A CN109709464 A CN 109709464A CN 201811240386 A CN201811240386 A CN 201811240386A CN 109709464 A CN109709464 A CN 109709464A
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- compression joint
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Abstract
The present invention provides a kind of compression joint type IGBT detecting circuit for performance, which includes driving circuit, change of current valve controling circuit, low-current source circuit and saturation voltage drop Acquisition Circuit；The driving circuit includes the inductance L1 of sequentially connected programmable power supply, the compression joint type IGBT and ground connection；The programmable power supply is run under setup parameter, and input port is connected with NI capture card signal output port；It generates three kinds of control signals and controls being heated or cooled for compression joint type IGBT respectively, simulate IGBT actual working state；Technical solution provided by the invention, which will integrate acquisition control circuit, realizes the automation control detected to entire power cycle, and the present invention can continually and steadily be run, and realizes the reliability detection to compression joint type IGBT device power cycle.
Description
Technical field
The present invention relates to a kind of compression joint type IGBT devices, in particular to a kind of to be based on compression joint type IGBT device power cycle
Detecting circuit for performance.
Background technique
IGBT (Insulated Gate Bipolar Transistor) insulated gate bipolar transistor, since it both has
Have the advantages that MOSFET element driving power is small, switching speed is fast, but have bipolar device hold saturation pressure reduce and capacity is big
The advantages of, it is more and more widely used in modern power electronics technology, especially in the big or middle power of upper frequency
Leading position is occupied in.And novel compression joint type IGBT device has two-side radiation characteristic, short circuit failure mode etc. is excellent
Good characteristic is particularly suitable for application to series-type voltage source inverter scene, has in electric system application field unique excellent
Gesture, but need to provide a kind of for compression joint type IGBT power cycle performance acquisition control circuit.
Summary of the invention
In order to solve at this stage not completely for the acquisition control integrated circuit of compression joint type IGBT power cycle
Deficiency, the present invention provide a kind of integral design method based on compression joint type IGBT power cycle test acquisition control circuit, the party
Method being capable of overall-in-one control schema experimental condition and test data needed for acquisition.
Present invention provide the technical scheme that a kind of acquisition control circuit for detecting compression joint type IGBT performance, improves it
Be in: the circuit includes driving circuit, change of current valve controling circuit, low-current source circuit and saturation voltage drop Acquisition Circuit；
The driving circuit includes the inductance L1 of sequentially connected programmable power supply, the compression joint type IGBT and ground connection；
The programmable power supply:
It is run under setup parameter；
Its input port is connected with NI capture card signal output port；
It generates three kinds of control signals and controls being heated or cooled for compression joint type IGBT respectively, simulate IGBT actual working state；
After signal 1 in the control signal drives compression joint type IGBT conducting, through-flow electric current Il heats the compression joint type
IGBT is allowed to heat up.
Preferably, the setup parameter of the programmable power supply includes: the current value of through-flow electric current Il, the compression joint type IGBT
Turn-on and turn-off time number and it is described detection circulation cycle-index.
Preferably the change of current valve controling circuit includes:
Sequentially connected resistance R4, triode (S1), electromagnetic relay (C1), cooling converter valve, cooling circuit and water cooling
Board group at cooling circuit 1, and
By resistance R5, triode (S2), electromagnetic relay (C2), branch converter valve, bypass loop, cooling circuit and water cooling
Board group at circuit be sequentially connected the cooling circuit 2 of composition；
The input terminal of the change of current valve controling circuit is connected with the output port of the programmable power supply, controls bypass loop
With the turn-on and turn-off of cooling circuit；The output end of the water-cooled plate is connect with IGBT；
The water-cooled plate:
Heating period does not act on, the compression joint type IGBT heating；
Cooling stage triggering cooling, the compression joint type IGBT cooling；
The turn-on and turn-off that signal 2 in signal controls triode S1 are controlled, cooling circuit 1 does not act on when conducting, when shutdown
Triggering cooling；
Signal 3 in the control signal controls the turn-on and turn-off of triode S2, and cooling circuit 2 does not act on when conducting,
Cooling is triggered when shutdown.
The preferred low-current source circuit includes: power supply V3, power supply V4, resistance R3, operational amplifier and triode
(S3)；
The power supply V3 is connect by resistance R3 with the negative input mouth of the operational amplifier；
The power supply V4 is connected with the electrode input end mouth of the operational amplifier；
The transmitting with the triode (S3) respectively of the negative input mouth and cathode output end mouth of the operational amplifier
Pole connects and connect with the base stage of the triode (S3)；
The negative input of the operational amplifier of the collector and saturation voltage drop Acquisition Circuit of the triode (S3)
Mouth connection；
The output port of the low-current source circuit is connected with the saturation voltage drop Acquisition Circuit, in the compression joint type IGBT
Pressure drop when shutdown for the both ends IGBT under acquisition low current provides current source.
The preferred saturation voltage drop Acquisition Circuit includes diode D1, diode D2, diode D3, resistance R1, resistance
R2 and operational amplifier；
The cathode and anode of the diode D1 point is connect with the collector of the IGBT and the cathode of the diode D2
Connection；
The anode of the diode D2 is connect with the collector of the low-current source triode；
The diode D3 and the diode D2 reverse parallel connection；
The anode of the diode D2 is connected by resistance R1 with the negative input mouth of the operational amplifier；
The resistance R2 is connected to the negative input mouth of the operational amplifier and the output end of the operational amplifier
Between mouthful；
The electrode input end mouth of the operational amplifier is connect with the anode of the diode D1；
The output port of the operational amplifier is connect with the NI capture card；
The saturation voltage drop Acquisition Circuit is for acquiring the pressure drop at the both ends IGBT and the compression joint type under low current
The saturation voltage drop of IGBT
Further, the voltage difference of the diode D1 and the voltage difference at the both ends the diode D2 are equal and described
When resistance R1 is equal with the resistance value of the resistance R2, what the NI capture card acquired is the saturation voltage drop of compression joint type IGBT.
The further pressure drop at the both ends IGBT and the saturation pressure of the IGBT under the low current in setting detection for the first time
Depreciation is standard volume；
Set n-th detection in low current under the both ends IGBT pressure drop and the IGBT saturation pressure depreciation be reality
The amount of testing；
When the offset of the experimental amount and the standard volume is less than 20%, normal operation circuit；The experimental amount and institute
When stating the offset of standard volume more than or equal to 20%, fault.
Further, the electric current I such as formula of the low-current source:It is shown, by the power supply V3、V4With resistance R3It adjusts
Section.
Compared with the latest prior art, technical solution provided by the invention has following excellent effect:
Acquisition control function is integrated on one piece of pcb board by technical solution provided by the invention, facilitates the connection of circuit,
One pcb board acquires all data, ensure that data time sequence is unified；Enhancing circuit reliability simultaneously again can to capture card reality
Protection is applied, the stable operation in power cycle procedure, and the Accurate Determining to compression joint type IGBT cycle performance are realized.
Detailed description of the invention
Fig. 1 is compression joint type IGBT detecting circuit for performance schematic diagram of the present invention；
Fig. 2 is the V of the IGBT that is directly acquired with oscillograph under switch statece；
Fig. 3 is the V captured with oscillograph in saturation voltage drop signal acquisition portce。
Specific embodiment
In order to better understand the present invention, the contents of the present invention are done further with example with reference to the accompanying drawings of the specification
Explanation.
Fig. 1 is the complete schematic of this IC system in the present invention, including driving circuit, change of current valve controling circuit,
Low-current source circuit and saturation voltage drop circuit.Wherein:
One, drive circuit module
The drive circuit module includes the inductance of sequentially connected programmable power supply, the compression joint type IGBT and ground connection
L1；
The programmable power supply is run under setup parameter；The input port and NI of the programmable power supply acquire card signal
Output port is connected；The programmable power supply generates three kinds of control signals and controls being heated or cooled for compression joint type IGBT, mould respectively
Quasi- IGBT actual working state；After signal 1 in the control signal drives compression joint type IGBT conducting, through-flow electric current Il heats institute
Compression joint type IGBT is stated to be allowed to heat up；Signal 2 in the control signal controls the turn-on and turn-off of triode S1, and when conducting is cooling
Circuit 1 does not act on, triggering cooling when shutdown；Signal 3 in the control signal controls the turn-on and turn-off of triode S2, conducting
When cooling circuit 2 do not act on, triggering cooling when shutdown.
The setup parameter of the programmable power supply includes: the current value of the through-flow electric current Il, the compression joint type IGBT
The cycle-index of turn-on and turn-off time number and the detection circulation.The high level of driving circuit in+15V or so, low level-
8V or so can effectively open shutdown IGBT.
V of the IGBT that Fig. 2 is directly acquired with oscillograph under switch statece, Fig. 3 is with oscillograph in saturation voltage drop signal
The V that acquisition port capturesce, the voltage at the both ends IGBT is all by the way that two ways is collected when the two comparison discovery turns off
10.3V；And when IGBT conducting, by the collected voltage of two ways, one is 500mV, and one is 499mV, and error is only
For 1mV, illustrate that the saturation voltage drop precision acquired by saturation voltage drop collection plate is very high, complies fully with acquisition and require.
The turn-on and turn-off time of compression joint type IGBT all controlled at 1-60 seconds, and a circulation is divided into two parts: conducting/
Shutdown；The current value of electric current Il is traditionally arranged to be 50-4000A；The cycle-index setting of detection circulation are as follows: 0-10 ten thousand times.
Term " detection " is determining sampled point first, general mono- point data of 100us -1ms before and after choosing on, off
As collection point.
Two, converter valve control circuit module
The conducting shutdown of triode is controlled by using the signal that programmable power supply (LabVIEW) is issued, and then is controlled
The conducting of relay turns off, and finally controls the conducting shutdown of converter valve.The change of current valve controling circuit includes two circuits:
One of circuit includes sequentially connected resistance R4, triode (S1), electromagnetic relay (C1), the cooling change of current
The cooling circuit 1 of valve, cooling circuit and water-cooled plate composition；Another time routing resistance R5, triode (S2), electromagnetic relay
(C2), the circuit of branch converter valve, bypass loop, cooling circuit and water-cooled plate composition is sequentially connected 2 groups of cooling circuit of composition
At；
The input terminal of the change of current valve controling circuit is connected with the output port of the programmable power supply, controls bypass loop
With the turn-on and turn-off of cooling circuit；The output end of the water-cooled plate is connect with IGBT；
The water-cooled plate is not acted in the heating period, the compression joint type IGBT heating；
The water-cooled plate is triggered in cooling stage and is cooled down, the compression joint type IGBT cooling；
Signal 2 in the control signal controls the turn-on and turn-off of triode S1, and cooling circuit 1 does not act on when conducting,
Cooling is triggered when shutdown；
Signal 3 in the control signal controls the turn-on and turn-off of triode S2, and cooling circuit 2 does not act on when conducting,
Cooling is triggered when shutdown.
Three, low-current source part
The low-current source circuit includes: power supply V3, power supply V4, resistance R3, operational amplifier and triode (S3)；
The power supply V3 is connect by resistance R3 with the negative input mouth of the operational amplifier；
The power supply V4 is connected with the electrode input end mouth of the operational amplifier；
The transmitting with the triode (S3) respectively of the negative input mouth and cathode output end mouth of the operational amplifier
Pole connects and connect with the base stage of the triode (S3)；
The negative input of the operational amplifier of the collector and saturation voltage drop Acquisition Circuit of the triode (S3)
Mouth connection；
The output port of the low-current source circuit is connected with the saturation voltage drop Acquisition Circuit, in the compression joint type IGBT
Pressure drop when shutdown for the both ends IGBT under acquisition low current provides current source.
The saturation voltage drop Acquisition Circuit includes diode D1, diode D2, diode D3, resistance R1, resistance R2 and fortune
Calculate amplifier；
The cathode and anode of the diode D1 point is connect with the collector of the IGBT and the cathode of the diode D2
Connection；
The anode of the diode D2 is connect with the collector of the low-current source triode；
The diode D3 and the diode D2 reverse parallel connection；
The anode of the diode D2 is connected by resistance R1 with the negative input mouth of the operational amplifier；
The resistance R2 is connected to the negative input mouth of the operational amplifier and the output end of the operational amplifier
Between mouthful；
The electrode input end mouth of the operational amplifier is connect with the anode of the diode D1；
The output port of the operational amplifier is connect with the NI capture card；
The saturation voltage drop Acquisition Circuit is for acquiring the pressure drop at the both ends IGBT and the compression joint type under low current
The saturation voltage drop of IGBT.
The voltage difference of the diode D1 is equal with the voltage difference at the both ends the diode D2, and the resistance R1 with
When the resistance value of the resistance R2 is equal, the saturation voltage drop of the NI capture card acquisition compression joint type IGBT.
The detection includes:
Set for the first time detection in low current under the both ends IGBT pressure drop and the IGBT saturation pressure depreciation as
Standard volume；
Set n-th detection in low current under the both ends IGBT pressure drop and the IGBT saturation pressure depreciation be reality
The amount of testing；
When the offset of the experimental amount and the standard volume is less than 20%, normal operation circuit；The experimental amount and institute
When stating the offset of standard volume more than or equal to 20%, fault.
The electric current I such as formula of the low-current source:It is shown, by the power supply V3、V4With resistance R3It adjusts.
V3Value range be 0-100V；V4Value range be 0-25V；The value range of R3 is 0-500T.Four, it is saturated
Voltage acquisition part
The saturation voltage drop Acquisition Circuit includes diode D1, diode D2, diode D3, resistance R1, resistance R2 and fortune
Calculate amplifier；
The cathode and anode of the diode D1 point is connect with the collector of the IGBT and the cathode of the diode D2
Connection；
The anode of the diode D2 is connect with the collector of the low-current source triode；
The diode D3 and the diode D2 reverse parallel connection；
The anode of the diode D2 is connected by resistance R1 with the negative input mouth of the operational amplifier；
The resistance R2 is connected to the negative input mouth of the operational amplifier and the output end of the operational amplifier
Between mouthful；
The electrode input end mouth of the operational amplifier is connect with the anode of the diode D1；
The output port of the operational amplifier is connect with the NI capture card；
The saturation voltage drop Acquisition Circuit is for acquiring the pressure drop at the both ends IGBT and the compression joint type under low current
The saturation voltage drop of IGBT.
Diode D1 and diode D2 connect they by low-current source I when IGBT is opened (electric current IL) is positive
Conducting, the cathode of D1 are connected with the collector of IGBT, if IGBT is turned off, diode D1, which can be reversed, locks IGBT current collection
The voltage of extreme mouth, prevents the high voltage occurred in turn off process from damaging to Acquisition Circuit part.And D3's and D2 is anti-
To parallel connection, it ensure that the high voltage in IGBT turn off process is completely locked at the both ends D1.In the forward conduction for guaranteeing D2 and D1
In the identical situation of performance, available following formula:
△VD2=V1-V2
△VD1=V2-Vce
△VD1=△ VD2
Vce=2V2-V1
It is adjusted when by the voltage of operational amplifier U1, it is assumed that R1=R2In the case where, obtain V 'ce:
V'ce=V1-2(V1-V2)=2V2-V1
ΔVD1For the voltage at the both ends D1, Δ VD2For the voltage at the both ends D2, as can be seen from the above equation in D1 and D2, R1And R2Phase
With in the case where, Vce=V 'ce, i.e., in the saturation voltage drop that the voltage that NI acquisition port is adopted is exactly compression joint type IGBT.
Term " detection " is determining sampled point first, it is general choose 100us -1ms before and after on, off (optionally and
A point data is as collection point calmly).
The above is only the embodiment of the present invention, are not intended to restrict the invention, all institutes in the spirit and principles in the present invention
Any modification made, same replacement or improvement are all contained within copending scope of the presently claimed invention.
Claims (8)
1. a kind of compression joint type IGBT detecting circuit for performance, which is characterized in that the circuit includes driving circuit, converter valve control electricity
Road, low-current source circuit and saturation voltage drop Acquisition Circuit；
The driving circuit includes the inductance L1 of sequentially connected programmable power supply, the compression joint type IGBT and ground connection；
The programmable power supply:
It is run under setup parameter；
Its input port is connected with NI capture card signal output port；
It generates three kinds of control signals and controls being heated or cooled for compression joint type IGBT respectively, simulate IGBT actual working state；It is described
After controlling the driving compression joint type IGBT conducting of signal 1 in signal, through-flow electric current Il heats the compression joint type IGBT and is allowed to heat up.
2. a kind of detection circuit of compression joint type IGBT performance as claimed in claim 1, which is characterized in that the programmable power supply is set
Determining parameter includes: the current value of the through-flow electric current Il, the turn-on and turn-off time number of the compression joint type IGBT and the detection
The cycle-index of circulation.
3. a kind of compression joint type IGBT detecting circuit for performance as claimed in claim 1, which is characterized in that
The change of current valve controling circuit includes:
Sequentially connected resistance R4, triode (S1), electromagnetic relay (C1), cooling converter valve, cooling circuit and water cooling board group
At cooling circuit 1, and
By resistance R5, triode (S2), electromagnetic relay (C2), branch converter valve, bypass loop, cooling circuit and water cooling board group
At circuit be sequentially connected the cooling circuit 2 of composition；
The input terminal of the change of current valve controling circuit is connected with the output port of the programmable power supply, controls bypass loop and cold
But the turn-on and turn-off in circuit；The output end of the water-cooled plate is connect with IGBT；
The water-cooled plate:
Heating period does not act on, the compression joint type IGBT heating；
Cooling stage triggering cooling, the compression joint type IGBT cooling；
Signal 2 in the control signal controls the turn-on and turn-off of triode S1, and cooling circuit 1 does not act on when conducting, turns off
When triggering cooling；
Signal 3 in the control signal controls the turn-on and turn-off of triode S2, and cooling circuit 2 does not act on when conducting, turns off
When triggering cooling.
4. a kind of compression joint type IGBT detecting circuit for performance as claimed in claim 1, which is characterized in that
The low-current source circuit includes: power supply V3, power supply V4, resistance R3, operational amplifier and triode (S3)；
The power supply V3 is connect by resistance R3 with the negative input mouth of the operational amplifier；
The power supply V4 is connected with the electrode input end mouth of the operational amplifier；
The negative input mouth and cathode output end mouth of the operational amplifier connect with the emitter of the triode (S3) respectively
It connects and is connect with the base stage of the triode (S3)；
The negative input mouth of the operational amplifier of the collector and saturation voltage drop Acquisition Circuit of the triode (S3) connects
It connects；
The output port of the low-current source circuit is connected with the saturation voltage drop Acquisition Circuit, is turned off in the compression joint type IGBT
When for the pressure drop at the both ends IGBT under acquisition low current provide current source.
5. a kind of acquisition control circuit for detecting compression joint type IGBT performance as claimed in claim 1, which is characterized in that
The saturation voltage drop Acquisition Circuit includes that diode D1, diode D2, diode D3, resistance R1, resistance R2 and operation are put
Big device；
The cathode and anode of the diode D1 point is connect with the collector of the IGBT and the connection of the cathode of the diode D2；
The anode of the diode D2 is connect with the collector of the low-current source triode；
The diode D3 and the diode D2 reverse parallel connection；
The anode of the diode D2 is connected by resistance R1 with the negative input mouth of the operational amplifier；
The resistance R2 be connected to the operational amplifier negative input mouth and the operational amplifier output port it
Between；
The electrode input end mouth of the operational amplifier is connect with the anode of the diode D1；
The output port of the operational amplifier is connect with the NI capture card；
The saturation voltage drop Acquisition Circuit is used to acquire the pressure drop at the both ends IGBT and the compression joint type IGBT under low current
Saturation voltage drop.
6. a kind of compression joint type IGBT detecting circuit for performance as claimed in claim 5, which is characterized in that
The voltage difference of the diode D1 is equal with the voltage difference at the both ends the diode D2, and the resistance R1 with it is described
When the resistance value of resistance R2 is equal, the saturation voltage drop of the NI capture card acquisition compression joint type IGBT.
7. a kind of compression joint type IGBT detecting circuit for performance as claimed in claim 5, which is characterized in that the detection includes:
Set for the first time detection in low current under the both ends IGBT pressure drop and the IGBT saturation pressure depreciation as standard
Amount；
Set n-th detection in low current under the both ends IGBT pressure drop and the IGBT saturation pressure depreciation be test
Amount；
When the offset of the experimental amount and the standard volume is less than 20%, normal operation circuit；The experimental amount and the mark
When the offset of quasi- amount is more than or equal to 20%, fault.
8. such as a kind of compression joint type IGBT detecting circuit for performance of claim 4, which is characterized in that the electric current I of the low-current source is such as
Formula:It is shown, by the power supply V3、V4With resistance R3It adjusts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811240386.8A CN109709464A (en) | 2018-10-24 | 2018-10-24 | A kind of compression joint type IGBT detecting circuit for performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811240386.8A CN109709464A (en) | 2018-10-24 | 2018-10-24 | A kind of compression joint type IGBT detecting circuit for performance |
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| CN109709464A true CN109709464A (en) | 2019-05-03 |
Family
ID=66254723
Family Applications (1)
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|---|---|---|---|
| CN201811240386.8A Pending CN109709464A (en) | 2018-10-24 | 2018-10-24 | A kind of compression joint type IGBT detecting circuit for performance |
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| CN110850261A (en) * | 2019-11-12 | 2020-02-28 | 广州广电计量检测股份有限公司 | Online measurement circuit and measurement method |
| CN116449170A (en) * | 2023-06-14 | 2023-07-18 | 佛山市联动科技股份有限公司 | Testing device and testing method for testing two-pin device and three-pin device |
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