CN207937585U - A kind of functional test circuit of power semiconductor modular over-current detection circuit - Google Patents
A kind of functional test circuit of power semiconductor modular over-current detection circuit Download PDFInfo
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- CN207937585U CN207937585U CN201820230765.8U CN201820230765U CN207937585U CN 207937585 U CN207937585 U CN 207937585U CN 201820230765 U CN201820230765 U CN 201820230765U CN 207937585 U CN207937585 U CN 207937585U
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- variable resistance
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 title claims abstract description 20
- 238000011990 functional testing Methods 0.000 title claims abstract description 17
- 230000005611 electricity Effects 0.000 claims description 5
- 230000009466 transformation Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model provides a kind of functional test circuit of power semiconductor modular over-current detection circuit, it simulates the saturation voltage drop between emitter-base bandgap gradings and collector of the IGBT under two kinds of operating modes of overcurrent and non-overcurrent with function test circuit, to give over-current detection circuit to manufacture a kind of test environment.It includes fixed value resistance R1, R4, variable resistance R2, R3, R5, the both ends of variable resistance R3 are parallel with diode D1, the first incoming end is connected after one end parallel connection of the cathode and variable resistance R3 of diode D1, the base stage of connecting triode Q3 after the other end parallel connection of the anode and variable resistance R3 of the diode D1, the collector of the triode Q3 is separately connected one end of fixed value resistance R4, the grid of metal-oxide-semiconductor Q4, it is provided with capacitance C1 between the emitter of the triode Q3 and the other end of the variable resistance R3, one end of the source electrode connection variable resistance R5 of the metal-oxide-semiconductor Q4, the emitter of the other end connection and triode Q3 of the variable resistance R5, capacitance C1 is connected.
Description
Technical field
The utility model is related to the detection technique field that IGBT crosses current circuit, specially a kind of power semiconductor modular overcurrent
The functional test circuit of detection circuit.
Background technology
Need to monitor Vcesat after IGBT conductings to judge whether overcurrent.If IGBT not overcurrents, the small Mr. Yu's threshold values of Vcesat
Vce_thr；If IGBT overcurrents, Vcesat can be increased rapidly to more than Vce_thr.Therefore, monitoring Vcesat is identification IGBT mistakes
The common method of stream.Fig. 1 show driving and the overcurrent monitoring schematic diagram of half-bridge.Q1 and Q2 is IGBT；DC+ and DC- are
Busbar positive and negative anodes；The PWM1 and PWM2 control signals that chip exports in order to control；HV1+ and LV1- is the high-low voltage for driving Q1,
0V reference voltages are E1；HV2+ and LV2- is the high-low voltage for driving Q2, and 0V reference voltages are E2；Vcesat detection circuits 1
The voltage for acquiring C1, E1 and C2, E2 with 2, by the whether normal status signal ST1 and ST2 of Vcesat is calculated；ST1
Control chip is fed back to ST2, to carry out error protection.
Invention content
In view of the above-mentioned problems, the utility model provides a kind of functional test of power semiconductor modular over-current detection circuit
Circuit, with the saturation between emitter-base bandgap gradings and collector of the function test circuit simulation IGBT under two kinds of operating modes of overcurrent and non-overcurrent
Pressure drop is not necessarily to IGBT module and upper high pressure to manufacture a kind of test environment to over-current detection circuit, is realized in circuit board level
The functional test of over-current detection circuit, it is at low cost, safe and efficient, thus it is more applicable for large-scale production；Due to the circuit
The adjustment that Vcesat amplitudes and step moment may be implemented has general so as to adapt to different driving circuit and IGBT
Property.
A kind of functional test circuit of power semiconductor modular over-current detection circuit, it is characterised in that：It includes definite value electricity
Hinder R1, R4, variable resistance R2, R3, R5, the both ends of variable resistance R3 are parallel with diode D1, the cathode of diode D1 and variable
The first incoming end is connected after one end parallel connection of resistance R3, after the other end parallel connection of the anode and variable resistance R3 of the diode D1
The base stage of connecting triode Q3, the collector of the triode Q3 be separately connected one end of fixed value resistance R4, metal-oxide-semiconductor Q4 grid
Pole is provided with capacitance C1 between the emitter of the triode Q3 and the other end of the variable resistance R3, the metal-oxide-semiconductor Q4's
Source electrode connects one end of variable resistance R5, emitter, the capacitance C1 of the other end connection and triode Q3 of the variable resistance R5
It is connected, the one end the variable resistance R2 is connected with the drain electrode of metal-oxide-semiconductor Q4, the other end of the variable resistance R2 and can power transformation
The other end of resistance R5 is connected, and one end of the variable resistance is also associated with one end of fixed value resistance R1, the fixed value resistance
The other end connects the second incoming end after being connected with the other end of fixed value resistance R4, external first output end of the other end of the R2,
The external second output terminal in one end of the R2.
It is further characterized by：
By driving of the driving as functional test circuit in half-bridge drive circuit, HV1+ and LV1- are driving Q1
High-low voltage, chip output control signal PWM1 are the signal receiving end of driving, the high voltage HV1+ connections described second of driving
The ends G1 of incoming end, driving connect the first incoming end, and the ends C1 of Vcesat detection circuits and the ends E1 are respectively connected to the first output
End, second output terminal；
When chip output control signal PWM1 is 0, G1 voltages are equal to HV1-, and the electricity of C1 passes through D1 quick releases, Q3 cut-offs；
The G pole tensions of Q4, which are drawn high by R4 to HV1+, Q4, to be ended；The input voltage at the ends C1 is partial pressure values of the HV1+ through R1 and R2, adjusts R2
Resistance value can adjust the partial pressure value；
When PWM1 is 1, G1 voltages are equal to HV1+, and G1 is charged by R3 to C1, when C1 voltages reach the turn-on threshold of Q3,
Q3 is connected；The G pole tensions of Q4 are pulled to E1, Q4 conductings by Q3.The input voltage at the ends C1 is partial pressure values of the HV1+ through R1, R2 and R5,
The resistance value of adjustment R5 can adjust the partial pressure value；
The resistance value of adjustment R3 can adjust the speed that G1 charges to C1, be got higher between the time be connected with Q3 so as to adjust G1
Every.
After the utility model, emitter-base bandgap grading and current collection after circuit can be connected with analog insulation grid bipolar transistor (IGBT)
Saturation voltage drop (Vcesat) between pole, to without IGBT module and upper high pressure, only increase portion of external electricity by probe
Road, you can realize the functional test of over-current detection circuit in circuit board level；The functional test circuit can adjust Vcesat's
Amplitude and the time interval of IGBT conductings and Vcesat declines are turned on and off, it is normal and improper so as to simulate
Working condition, detected with this.
Description of the drawings
Fig. 1 is driving and the overcurrent monitoring schematic diagram of half-bridge；
Fig. 2 is the test circuit connection status structural schematic diagram of the utility model.
Specific implementation mode
A kind of functional test circuit of power semiconductor modular over-current detection circuit, is shown in Fig. 2：It include fixed value resistance R1,
The both ends of R4, variable resistance R2, R3, R5, variable resistance R3 are parallel with diode D1, the cathode and variable resistance R3 of diode D1
One end parallel connection after connect the first incoming end, connecting triode after the other end parallel connection of the anode and variable resistance R3 of diode D1
The base stage of Q3, the collector of triode Q3 be separately connected one end of fixed value resistance R4, metal-oxide-semiconductor Q4 grid, the hair of triode Q3
Capacitance C1 is provided between emitter-base bandgap grading and the other end of variable resistance R3, one end of the source electrode connection variable resistance R5 of metal-oxide-semiconductor Q4 can
The other end connection for becoming resistance R5 is connected with the emitter of triode Q3, capacitance C1, the one end variable resistance R2 and metal-oxide-semiconductor Q4's
Drain electrode is connected, and the other end of variable resistance R2 is connected with the other end of variable resistance R5, and one end of variable resistance is also connected with
There is one end of fixed value resistance R1, the other end of fixed value resistance connects the second incoming end after being connected with the other end of fixed value resistance R4,
External first output end of the other end of R2, the external second output terminal in one end of R2.
By driving of the driving as functional test circuit in half-bridge drive circuit, HV1+ and LV1- are driving Q1
High-low voltage, chip output control signal PWM1 are the signal receiving end of driving, and the high voltage HV1+ connections second of driving access
End, the ends G1 of driving connect the first incoming end, and the ends C1 of Vcesat detection circuits and the ends E1 are respectively connected to the first output end, the
Two output ends；
When chip output control signal PWM1 is 0, G1 voltages are equal to HV1-, and the electricity of C1 passes through D1 quick releases, Q3 cut-offs；
The G pole tensions of Q4, which are drawn high by R4 to HV1+, Q4, to be ended；The input voltage at the ends C1 is partial pressure values of the HV1+ through R1 and R2, adjusts R2
Resistance value can adjust the partial pressure value.
When PWM1 is 1, G1 voltages are equal to HV1+, and G1 is charged by R3 to C1, when C1 voltages reach the turn-on threshold of Q3,
Q3 is connected；The G pole tensions of Q4 are pulled to E1, Q4 conductings by Q3；The input voltage at the ends C1 is partial pressure values of the HV1+ through R1, R2 and R5,
The resistance value of adjustment R5 can adjust the partial pressure value；
The resistance value of adjustment R3 can adjust the speed that G1 charges to C1, be got higher between the time be connected with Q3 so as to adjust G1
Every.
Its operation principle is as follows：Pass through emitter-base bandgap gradings of the functional test breadboardin IGBT under two kinds of operating modes of overcurrent and non-overcurrent
Saturation voltage drop between collector, to manufacture a kind of test environment to Vcesat detection circuits.
Specific embodiment of the utility model is described in detail above, but content is only what the utility model was created
Preferred embodiment should not be construed as limiting the practical range of the utility model creation.All created according to the utility model is applied
All the changes and improvements made by range etc. should all still belong within this patent covering scope.
Claims (3)
1. a kind of functional test circuit of power semiconductor modular over-current detection circuit, it is characterised in that：It includes fixed value resistance
R1, R4, variable resistance R2, R3, R5, the both ends of variable resistance R3 are parallel with diode D1, the cathode of diode D1 and can power transformation
The first incoming end is connected after hindering one end parallel connection of R3, is connected after the other end parallel connection of the anode and variable resistance R3 of the diode D1
Connect the base stage of triode Q3, the collector of the triode Q3 be separately connected one end of fixed value resistance R4, metal-oxide-semiconductor Q4 grid,
Capacitance C1, the source of the metal-oxide-semiconductor Q4 are provided between the emitter of the triode Q3 and the other end of the variable resistance R3
Pole connects one end of variable resistance R5, the other end connection of the variable resistance R5 and emitter, the capacitance C1 phases of triode Q3
Connection, the one end the variable resistance R2 are connected with the drain electrode of metal-oxide-semiconductor Q4, the other end and variable resistance of the variable resistance R2
The other end of R5 is connected, and one end of the variable resistance is also associated with one end of fixed value resistance R1, the fixed value resistance it is another
One end connects the second incoming end, external first output end of the other end of the R2, institute after being connected with the other end of fixed value resistance R4
State the external second output terminal in one end of R2.
2. a kind of functional test circuit of power semiconductor modular over-current detection circuit as described in claim 1, feature exist
In：By driving of the driving as functional test circuit in half-bridge drive circuit, HV1+ and LV1- are the height for driving Q1
Voltage, chip output control signal PWM1 are the signal receiving end of driving, high voltage HV1+ connections second access of driving
End, the ends G1 of driving connect the first incoming end, and the ends C1 of Vcesat detection circuits and the ends E1 are respectively connected to the first output end, the
Two output ends.
3. a kind of functional test circuit of power semiconductor modular over-current detection circuit as described in claim 1, feature exist
In：When chip output control signal PWM1 is 0, G1 voltages are equal to HV1-, and the electricity of C1 passes through D1 quick releases, Q3 cut-offs；The G of Q4
Pole tension, which is drawn high by R4 to HV1+, Q4, to be ended；The input voltage at the ends C1 is partial pressure values of the HV1+ through R1 and R2, adjusts the resistance value of R2
The partial pressure value can be adjusted；
When PWM1 is 1, G1 voltages are equal to HV1+, and G1 is charged by R3 to C1, and when C1 voltages reach the turn-on threshold of Q3, Q3 is led
It is logical；The G pole tensions of Q4 are pulled to E1, Q4 conductings by Q3；The input voltage at the ends C1 is partial pressure values of the HV1+ through R1, R2 and R5, adjustment
The resistance value of R5 can adjust the partial pressure value；
The resistance value of adjustment R3 can adjust the speed that G1 charges to C1, and the time interval be connected with Q3 is got higher so as to adjust G1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820230765.8U CN207937585U (en) | 2018-02-09 | 2018-02-09 | A kind of functional test circuit of power semiconductor modular over-current detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820230765.8U CN207937585U (en) | 2018-02-09 | 2018-02-09 | A kind of functional test circuit of power semiconductor modular over-current detection circuit |
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| CN207937585U true CN207937585U (en) | 2018-10-02 |
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| CN201820230765.8U Withdrawn - After Issue CN207937585U (en) | 2018-02-09 | 2018-02-09 | A kind of functional test circuit of power semiconductor modular over-current detection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303666A (en) * | 2018-02-09 | 2018-07-20 | 苏州绿控新能源科技有限公司 | A kind of functional test circuit of power semiconductor modular over-current detection circuit |
-
2018
- 2018-02-09 CN CN201820230765.8U patent/CN207937585U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108303666A (en) * | 2018-02-09 | 2018-07-20 | 苏州绿控新能源科技有限公司 | A kind of functional test circuit of power semiconductor modular over-current detection circuit |
| CN108303666B (en) * | 2018-02-09 | 2024-05-28 | 苏州绿控新能源科技有限公司 | Function test circuit of power semiconductor module overcurrent detection circuit |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181002 Effective date of abandoning: 20240528 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20181002 Effective date of abandoning: 20240528 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |