CN108957292A - A kind of common type of power module testing circuit, system and test method - Google Patents
A kind of common type of power module testing circuit, system and test method Download PDFInfo
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- CN108957292A CN108957292A CN201810810698.1A CN201810810698A CN108957292A CN 108957292 A CN108957292 A CN 108957292A CN 201810810698 A CN201810810698 A CN 201810810698A CN 108957292 A CN108957292 A CN 108957292A
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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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
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Abstract
The present invention discloses a kind of common type of power module testing circuit and system, and test circuit includes adjustable AC power unit, the first alternating-current switch；System includes power module to be measured, adjustable AC power unit, control unit, the first alternating-current switch, the input terminal of the adjustable AC power unit and control unit is connected through the first alternating-current switch with single phase ac alternating current, and the output end of the adjustable source unit is connected with power module ac terminal to be measured；The adjustable AC power unit is made of single phase rectifier circuit, DC support capacitor, single-phase inversion circuit, the second alternating-current switch, discharge switch, current-limiting resistance, current sensor, voltage sensor.The Portable test system is designed using transless, small in size, weight is low, easy to carry；It is few with power module connection cables to be measured, it is simple and reliable；Export adjustable, automated procedures height.Present invention simultaneously discloses a kind of test methods of common type of power module test system.
Description
Technical field
The invention belongs to electric electronic current change technology fields, and in particular to a kind of common type of power module testing circuit is
System and test method.
Background technique
With the application and development of power electronic technique in the power system, power electronic equipment is towards high-voltage large-capacity mould
Block direction is developed, especially in photovoltaic DC-to-AC converter, wind-powered electricity generation inverter, cascade STATCOM and flexible HVDC transmission system
Equal fields are widely used, and are generally made of the power module that several are connected in series or in parallel.
Power module needs to carry out it in In-Plant Test factory test complete in detail, to improve testing efficiency and standard
True property, operation needs to carry out it fast and convenient on-the-spot test when breaking down at the scene, to determine fault point, while
Need to carry out it special performance test after maintenance is good, to determine whether to come into operation.
Present power module test and test rely primarily on the progress of the tools such as accessory power supply, multimeter, the test of these tools
Rapidity and accuracy cannot take into account, wiring is complicated when test, and testing efficiency is low, therefore needs simple and effective test macro
And its test method, the rapidity and accuracy of test are improved, this case is based on such consideration and generates.
Summary of the invention
Wiring is complicated when in order to solve existing power module test system testing, and testing efficiency is low, test method is complicated, from
The low problem of dynamicization degree, the invention proposes a kind of common type of power module testing circuit, system and test methods, have and survey
The advantages of line of trying is simple, and testing efficiency is high, high degree of automation.
To achieve the goals above, the specific scheme of the present invention is as follows:
The present invention provides a kind of common type of power module testing circuit, the circuit include adjustable AC power unit,
First alternating-current switch, in which:
The input terminal of the adjustable AC power unit and control unit is through the first alternating-current switch and single phase ac city
It is electrically connected and connects；
The adjustable AC power unit is handed over by single phase rectifier circuit, DC support capacitor, single-phase inversion circuit, second
Switch, discharge switch, discharge resistance, current-limiting resistance, current sensor, voltage sensor is flowed to form, the single phase rectifier circuit,
DC support capacitor, single-phase inversion circuit, the second alternating-current switch are sequentially connected in series, and discharge switch and discharge resistance are connected in series
Discharge loop is constituted, discharge loop is connected in the output end of the second alternating-current switch in parallel, and current-limiting resistance is connected on the second exchange and opens
Between the output end of pass and the output end of adjustable AC power unit；Current sensor acquisition flow through current-limiting resistance electric current,
Voltage sensor acquires the output voltage of adjustable AC power unit.
Wherein, the test circuit further includes fuse, and the fuse is connected to the first alternating-current switch and electric main
Between.
Wherein, the single phase rectifier circuit is controllable type single-phase rectification bridge, and DC voltage is adjustable.
Wherein, the single phase rectifier circuit is the single-phase rectification bridge that diode is constituted.
Wherein, the single-phase inversion circuit is single-phase full bridge inverter circuit.
Present invention simultaneously provides a kind of common type of power module test system, system includes power module to be measured, adjustable
AC power unit, control unit, the first alternating-current switch, in which:
The input terminal of the adjustable AC power unit and control unit is through the first alternating-current switch and single phase ac city
It is electrically connected and connects, the output end of the adjustable source unit is connected with power module ac terminal to be measured；
The adjustable AC power unit is handed over by single phase rectifier circuit, DC support capacitor, single-phase inversion circuit, second
Switch, discharge switch, discharge resistance, current-limiting resistance, current sensor, voltage sensor is flowed to form, the single phase rectifier circuit,
DC support capacitor, single-phase inversion circuit, the second alternating-current switch are sequentially connected in series, and discharge switch and discharge resistance are connected in series
Discharge loop is constituted, discharge loop is connected in the output end of the second alternating-current switch in parallel, and current-limiting resistance is connected on the second exchange and opens
Between the output end of pass and the output end of adjustable AC power unit；Current sensor acquisition flow through current-limiting resistance electric current,
Voltage sensor acquires the output voltage of adjustable AC power unit.
Wherein, the test macro further includes measuring unit, in the measuring unit and adjustable AC power unit
Current sensor and voltage sensor connection, acquire current sensor and voltage sensor signals, and signal is sent to control
Unit.
Wherein, the test macro further includes fuse, and the fuse is connected to the first alternating-current switch and electric main
Between.
Wherein, described control unit and power module to be measured, which are established, communicates, and control unit issues control instruction to measurement of power
Rate module, power module feedback states to be measured are to control unit.
Wherein, the power module to be measured is bridge-type electric and electronic power unit.
Wherein, the power module to be measured is semi-bridge type electric and electronic power unit.
Wherein, the single phase rectifier circuit can be controllable type single-phase rectification bridge, and DC voltage is adjustable.
Wherein, the single-phase rectification bridge that the single phase rectifier circuit can also be constituted for diode.
Wherein, the single-phase inversion circuit is single-phase full bridge inverter circuit.
Wherein, the adjustable AC power unit, control unit, measuring unit are board structure pattern, are arranged in
In one closed cabinet.
The invention also includes a kind of control methods of common type of power module test system:
(1) when entering test mode, described method includes following steps:
Step 1: the first alternating-current switch of closure；
Control unit carries out test macro self-test；
Step 2: control unit sends enabled instruction to adjustable AC power unit, the adjustable AC power unit
In single-phase inversion circuit start to work, export given alternating voltage；
Step 3: AC power source is sent into power module to be measured by the second alternating-current switch of closure；
Step 4: the rectifier bridge that AC power source passes through power module to be measured is the DC capacitor charging in power module to be measured；
Step 5: after DC capacitor charging complete, start starting test, in test process, control unit according to voltage,
Current signal and power module to be measured return status signal, whether exception is had according to the logic identification of setting, if judge to
Power scale module failure stops adjustable AC power unit and power module to be measured immediately, prompts fault message；
Step 7: after test macro completes test, showing test result.
(2) when entering power module discharge mode to be measured, described method includes following steps:
Step 11: separating the second alternating-current switch；
Step 12: control unit sends enabled instruction to power module to be measured, and power module to be measured enters inverter operation mould
Formula；
Step 13: closure discharge switch consumes the energy of capacitor memory storage by discharge resistance；
Step 14: after the completion of to be discharged, separating discharge switch.
Beneficial effects of the present invention:
1, the present invention provides alternating-current measurement power supply using adjustable AC power unit for power module to be measured, by be measured
The included rectification circuit of power module is that the DC capacitor of module charges, and eliminates the direct current of Conventional power modules test macro
Source input wires substantially reduce the complexity of system.
2, the electricity of the AC power source of the adjustable output of the single-phase inversion circuit in adjustable AC power unit of the invention
Pressure and frequency provide more flexible power input for test, keep measurement condition more complete with pilot system.Whole system
Input is only conventional alternating current, readily available at the scene, reduces the use difficulty of test macro.
3, the Portable test system is designed using transless, small in size, weight is low, easy to carry；With to power scale
Module connection cables are few, simple and reliable；Export adjustable, automated procedures height.
Detailed description of the invention
Fig. 1 is total system theory of constitution figure of the invention；
Figure label title: 1, electric main；2, the first alternating-current switch；3, fuse；4, single phase rectifier circuit；5, direct current
Support Capacitor；6, single-phase inversion circuit；7, the second alternating-current switch；8, discharge switch；9, discharge resistance；10, current-limiting resistance；11,
Current sensor；12, control unit；13, measuring unit；14, voltage sensor；15, power module to be measured；17, it is adjusted and hands over
Galvanic electricity source unit；
Fig. 2 is single phase rectifier circuit first embodiment；
Fig. 3 is single phase rectifier circuit second embodiment；
Fig. 4 is a kind of embodiment of single-phase inversion circuit.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
It is as shown in Figure 1 total system theory of constitution figure of the invention.The present invention provides a kind of common type of power modules
Circuit is tested, the circuit includes adjustable AC power unit, the first alternating-current switch, in which:
The input terminal of the adjustable AC power unit and control unit is through the first alternating-current switch and single phase ac city
It is electrically connected and connects；
The adjustable AC power unit is handed over by single phase rectifier circuit, DC support capacitor, single-phase inversion circuit, second
Switch, discharge switch, discharge resistance, current-limiting resistance, current sensor, voltage sensor is flowed to form, the single phase rectifier circuit,
DC support capacitor, single-phase inversion circuit, the second alternating-current switch are sequentially connected in series, and discharge switch and discharge resistance are connected in series
Discharge loop is constituted, discharge loop is connected in the output end of the second alternating-current switch in parallel, and current-limiting resistance is connected on the second exchange and opens
Between the output end of pass and the output end of adjustable AC power unit；Current sensor acquisition flow through current-limiting resistance electric current,
Voltage sensor acquires the output voltage of adjustable AC power unit.
Wherein, the test circuit further includes fuse, and the fuse is connected to the first alternating-current switch and electric main
Between.
Wherein, the single phase rectifier circuit is controllable type single-phase rectification bridge, and DC voltage is adjustable.
Wherein, the single phase rectifier circuit is the single-phase rectification bridge that diode is constituted.
Wherein, the single-phase inversion circuit is single-phase full bridge inverter circuit.
As shown in Figure 1, system includes to power scale mould present invention simultaneously provides a kind of common type of power module test system
Block, adjustable AC power unit, control unit, the first alternating-current switch, the adjustable AC power unit and control unit
Input terminal be connected through the first alternating-current switch with single phase ac alternating current, the output end of the adjustable source unit with it is to be measured
Power module ac terminal is connected；The adjustable AC power unit is by single phase rectifier circuit, DC support capacitor, single-phase inverse
Power transformation road, the second alternating-current switch, discharge switch, discharge resistance, current-limiting resistance, current sensor, voltage sensor composition, it is described
Single phase rectifier circuit, DC support capacitor, single-phase inversion circuit, the second alternating-current switch are sequentially connected in series, discharge switch with put
Resistance series connection connects and composes discharge loop, and discharge loop is connected in the output end of the second alternating-current switch, current-limiting resistance string in parallel
It is associated between the output end of the second alternating-current switch and the output end of adjustable AC power unit；Limit is flowed through in current sensor acquisition
Electric current, the voltage sensor of leakage resistance acquire the output voltage of adjustable AC power unit.
Wherein, the test macro further includes measuring unit, in the measuring unit and adjustable AC power unit
Current sensor and voltage sensor connection, acquire current sensor and voltage sensor signals, and signal is sent to control
Unit.
Wherein, the test macro further includes fuse, and the fuse is connected to the first alternating-current switch and electric main
Between.
Wherein, described control unit and power module to be measured, which are established, communicates, and control unit issues control instruction to measurement of power
Rate module, power module feedback states to be measured are to control unit.
Wherein, the power module to be measured is bridge-type electric and electronic power unit.
Wherein, the power module to be measured is semi-bridge type electric and electronic power unit.
Wherein, the single phase rectifier circuit can be controllable type single-phase rectification bridge, and DC voltage is adjustable, as shown in Figure 2.
Wherein, the single phase rectifier circuit is the single-phase rectification bridge that diode is constituted, as shown in Figure 3.
In the present embodiment, the single phase rectifier circuit is controllable type single-phase rectification bridge as shown in Figure 2, anti-by four groups of bands
The IGBT of parallel diode is constituted.
Wherein, the single-phase inversion circuit is single-phase full bridge inverter circuit, as shown in Figure 4.
Wherein, the adjustable AC power unit, control unit, measuring unit are board structure pattern, are arranged in
In one closed cabinet.
In the present embodiment, the input voltage that AC power unit is adjusted is 220V, by single phase-controlled rectification circuit,
DC support capacitance voltage is adjusted to 500V, can be adjusted alternating voltage to 0~350V range by single-phase inversion circuit,
In the present embodiment, it adjusts and arrives 300V, frequency is also adjusted, and in the present embodiment, frequency is adjusted to 50Hz.
The invention also includes a kind of control methods of common type of power module test system:
(1) when entering test mode, described method includes following steps:
Step 1: the first alternating-current switch of closure；
Control unit carries out test macro self-test；
Step 2: control unit sends enabled instruction to adjustable AC power unit, the adjustable AC power unit
In single-phase inversion circuit start to work, export given alternating voltage；
Step 3: AC power source is sent into power module to be measured by the second alternating-current switch of closure；
Step 4: the rectifier bridge that AC power source passes through power module to be measured is the DC capacitor charging in power module to be measured；
Step 5: after DC capacitor charging complete, starting starting and test, in test process, control unit real-time reception is simultaneously
The status signal for judging the voltage sent in measuring unit, current signal and power module to be measured return, according to patrolling for setting
It collects and identifies whether there is exception, if judging power module failure to be measured, stop adjustable AC power unit immediately and to power scale
Module prompts fault message.
Step 7: after test macro completes test, showing test result.
(2) when entering power module discharge mode to be measured, described method includes following steps:
Step 11: separating the second alternating-current switch；
Step 12: control unit sends enabled instruction to power module to be measured, and power module to be measured enters inverter operation mould
Formula；
Step 13: closure discharge switch consumes the energy of capacitor memory storage by discharge resistance；
Step 14: after the completion of to be discharged, separating discharge switch；
The above examples are only used to illustrate the technical scheme of the present invention rather than its limitations, carries out referring to above-described embodiment
Various forms is modified or is changed within the scope of the present invention.
Claims (18)
1. a kind of common type of power module testing circuit, it is characterised in that: the circuit includes adjustable AC power unit, the
One alternating-current switch, in which:
The input terminal of the adjustable AC power unit and control unit is through the first alternating-current switch and single phase ac alternating current phase
Connection；
The adjustable AC power unit is opened by single phase rectifier circuit, DC support capacitor, single-phase inversion circuit, the second exchange
Pass, discharge switch, discharge resistance, current-limiting resistance, current sensor, voltage sensor composition, the single phase rectifier circuit, direct current
Support Capacitor, single-phase inversion circuit, the second alternating-current switch are sequentially connected in series, and discharge switch and discharge resistance are connected in series and constitute
Discharge loop, discharge loop are connected in the output end of the second alternating-current switch in parallel, and current-limiting resistance is connected on the second alternating-current switch
Between output end and the output end of adjustable AC power unit；Current sensor acquires electric current, the voltage for flowing through current-limiting resistance
Sensor acquires the output voltage of adjustable AC power unit.
2. a kind of common type of power module testing circuit as described in claim 1, it is characterised in that: the test circuit also wraps
Fuse is included, the fuse is connected between the first alternating-current switch and electric main.
3. a kind of common type of power module testing circuit as described in claim 1, it is characterised in that: the single phase rectifier circuit
For controllable type single-phase rectification bridge, DC voltage is adjustable.
4. a kind of common type of power module testing circuit as described in claim 1, it is characterised in that: the single phase rectifier circuit
The single-phase rectification bridge constituted for diode.
5. a kind of common type of power module testing circuit as described in claim 1, it is characterised in that: the single-phase inversion circuit
For single-phase full bridge inverter circuit.
6. a kind of common type of power module test system, it is characterised in that: the system comprises power modules to be measured, adjustable friendship
Galvanic electricity source unit, control unit, the first alternating-current switch, in which:
The input terminal of the adjustable AC power unit and control unit is through the first alternating-current switch and single phase ac alternating current phase
Connection；
The output end of the adjustable source unit is connected with power module ac terminal to be measured；
The adjustable AC power unit is opened by single phase rectifier circuit, DC support capacitor, single-phase inversion circuit, the second exchange
Pass, discharge switch, discharge resistance, current-limiting resistance, current sensor, voltage sensor composition, the single phase rectifier circuit, direct current
Support Capacitor, single-phase inversion circuit, the second alternating-current switch are sequentially connected in series, and discharge switch and discharge resistance are connected in series and constitute
Discharge loop, discharge loop are connected in the output end of the second alternating-current switch in parallel, and current-limiting resistance is connected on the second alternating-current switch
Between output end and the output end of adjustable AC power unit；Current sensor acquires electric current, the voltage for flowing through current-limiting resistance
Sensor acquires the output voltage of adjustable AC power unit.
7. a kind of common type of power module test system as claimed in claim 6, it is characterised in that: the test macro is also wrapped
Include measuring unit, the measuring unit in adjustable AC power unit current sensor and voltage sensor connect,
Current sensor and voltage sensor signals are acquired, and signal is sent to control unit.
8. a kind of common type of power module test system as claimed in claim 6, it is characterised in that: the test macro is also wrapped
Fuse is included, the fuse is connected between the first alternating-current switch and electric main.
9. a kind of common type of power module test system as claimed in claim 6, it is characterised in that: described control unit with to
Power scale module establishes communication, and control unit issues control instruction to power module to be measured, and power module feedback states to be measured are given
Control unit.
10. a kind of common type of power module test system as claimed in claim 6, it is characterised in that: described to power scale mould
Block is bridge-type electric and electronic power unit.
11. a kind of common type of power module test system as claimed in claim 6, it is characterised in that: described to power scale mould
Block is semi-bridge type electric and electronic power unit.
12. a kind of common type of power module test system as claimed in claim 6, it is characterised in that: the single-phase rectifier electricity
Road is controllable type single-phase rectification bridge, and DC voltage is adjustable.
13. a kind of common type of power module test system as claimed in claim 6, it is characterised in that: the single-phase rectifier electricity
Road is the single-phase rectification bridge that diode is constituted.
14. a kind of common type of power module test system as claimed in claim 6, it is characterised in that: the single-phase inversion electricity
Road is single-phase full bridge inverter circuit.
15. a kind of common type of power module test system as claimed in claim 7, it is characterised in that: the adjustable exchange
Power supply unit, control unit, measuring unit are board structure pattern, are arranged in a closed cabinet.
16. a kind of control method of common type of power module test system as described in any one of claim 6 to 15,
Be characterized in that: when entering test mode, described method includes following steps:
Step 1: the first alternating-current switch of closure；
Step 2: control unit sends enabled instruction to adjustable AC power unit, in the adjustable AC power unit
Single-phase inversion circuit is started to work, and given alternating voltage is exported；
Step 3: AC power source is sent into power module to be measured by the second alternating-current switch of closure；
Step 4: the rectifier bridge that AC power source passes through power module to be measured is the DC capacitor charging in power module to be measured；
Step 5: after DC capacitor charging complete, starting starting and test, in test process, control unit is according to voltage, electric current
Whether signal and the status signal of power module to be measured return, have exception according to the logic identification of setting, if judging to measurement of power
Rate module failure stops adjustable AC power unit and power module to be measured immediately, prompts fault message；
Step 7: after test macro completes test, showing test result.
17. a kind of control method of common type of power module test system as claimed in claim 16, it is characterised in that: closure
After first alternating-current switch, control unit carries out test macro self-test.
18. a kind of control method of common type of power module test system as described in any one of claim 6 to 15,
Be characterized in that: when entering power module discharge mode to be measured, described method includes following steps:
Step 11: separating the second alternating-current switch；
Step 12: control unit sends enabled instruction to power module to be measured, and power module to be measured enters inverter operation mode；
Step 13: closure discharge switch consumes the energy of capacitor memory storage by discharge resistance；
Step 14: after the completion of to be discharged, separating discharge switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810810698.1A CN108957292A (en) | 2018-07-23 | 2018-07-23 | A kind of common type of power module testing circuit, system and test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810810698.1A CN108957292A (en) | 2018-07-23 | 2018-07-23 | A kind of common type of power module testing circuit, system and test method |
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Family
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|---|---|---|---|
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Cited By (5)
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| CN110133404A (en) * | 2019-05-17 | 2019-08-16 | 国网浙江省电力有限公司宁波供电公司 | Output signal analog device and secondary loading tests system |
| CN113793815A (en) * | 2021-09-26 | 2021-12-14 | 杭州广立微电子股份有限公司 | Wide-voltage-range high-speed multistage discharge circuit, test system and discharge method |
| CN114062797A (en) * | 2020-08-05 | 2022-02-18 | 华中科技大学 | Dynamic test board for needle-shaped terminal full-bridge type power module |
| CN114062803A (en) * | 2021-10-29 | 2022-02-18 | 广东电网有限责任公司广州供电局 | Power module capacitor current detection circuit and detection method |
| CN117092440A (en) * | 2023-10-16 | 2023-11-21 | 东方电子股份有限公司 | Power unit testing device |
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Application publication date: 20181207 |