CN119738627A - A passive network load test system for power modules - Google Patents
A passive network load test system for power modules Download PDFInfo
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- CN119738627A CN119738627A CN202411740658.6A CN202411740658A CN119738627A CN 119738627 A CN119738627 A CN 119738627A CN 202411740658 A CN202411740658 A CN 202411740658A CN 119738627 A CN119738627 A CN 119738627A
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Abstract
The invention discloses a passive network load test system of a power module, which comprises a test board, a single chip microcomputer, a driving circuit board, a computer, a serial port communication interface, a power module to be tested, a voltage and current detection module and a reactive load network, wherein the single chip microcomputer and the driving circuit board are arranged in the test board, the single chip microcomputer is connected with the driving circuit board through a signal transmission line and is connected with the computer through the serial port communication interface, the power module to be tested is arranged on the test board and is connected with the driving circuit board through the signal transmission line and is connected with the reactive load network through a wiring terminal and a direct current bus, and the voltage and current detection module is arranged between the power module to be tested and the reactive load network. The system provided by the invention can simulate the actual load by using the reactive load network without using a motor, test each dynamic parameter of the power module, analyze and process the test result, and realize the reliability verification of the power modules with different specifications under different working conditions.
Description
Technical Field
The invention belongs to the technical field of dynamic testing of power modules, and particularly relates to a passive network load testing system of a power module.
Background
The IGBT power module is a power semiconductor device which is most rapidly developed and widely used at home and abroad at present, the excellent high-speed switching performance of the IGBT power module enables the IGBT power module to be widely applied to new generation high-quality weaponry, and as various novel weapons continuously appear, high-energy weapons such as missile launching vehicles, radar power supplies, electromagnetic guns, laser weapons, electromagnetic catapulting and the like need large-capacity electric energy supply, and the demand for the IGBT is greatly increased. The performance of the power module directly determines whether the missile weapon system can reliably and stably operate.
At present, a testing system is mainly used for testing dynamic and static parameters of a power module, and the testing result can not completely reflect the load and heat design problems of the power module in actual use. The application of the power module is mainly focused on motor control, the motor control usually adopts a two-level voltage source inverter topology, the motor control working condition is complex, the stress influence on the power module is large, different motors are required to be selected for matching design according to different application occasions, and the required environment is harsh.
Disclosure of Invention
The invention solves the technical problems of overcoming the defects of the prior art, and provides a passive network load test system of a power module, which can simulate the actual load by using a reactive load network without using a motor, test each dynamic parameter of the power module, analyze and process the test result and realize the reliability verification of the power module with different specifications under different working conditions.
In order to solve the technical problems, the invention discloses a passive network load test system of a power module, which comprises a test board, a singlechip, a driving circuit board, a computer, a serial communication interface, a power module to be tested, a voltage and current detection module and a reactive load network, wherein the test board is connected with the singlechip; the single chip microcomputer and the driving circuit board are arranged in the test board, the single chip microcomputer is connected with the driving circuit board through a signal transmission line and connected with the computer through a serial port communication interface, the power module to be tested is arranged on the test board and connected with the driving circuit board through a signal transmission line, the power module to be tested is connected with the reactive load network through a wiring terminal and a direct current bus, and a voltage and current detection module is arranged between the power module to be tested and the reactive load network.
In the passive network load test system of the power module described above,
The voltage and current detection module is used for detecting the temperature, the phase current and the phase voltage of the power module to be detected and acquiring detection data;
the singlechip is used for carrying out filtering and averaging processing on the digital signals sent by the voltage and current detection module, sending the processed data to the computer through the serial communication interface and sending the processed data to the driving circuit board through the signal transmission line;
The computer is used for analyzing the processed data sent by the singlechip to obtain the current temperature, the phase current and the phase voltage of the power module to be tested, and displaying and storing the current temperature, the phase current and the phase voltage;
the driving circuit board is used for driving the power module to be tested according to processed data sent by the singlechip and combined with preset expected phase current, so that the power module to be tested generates phase current consistent with the expected phase current;
and the reactive load network is used for providing load for the power module to be tested.
In the passive network load test system of the power module, the voltage and current detection module comprises a Hall current sensor, a voltage sensor and a temperature sensor which are respectively used for measuring and obtaining the phase current, the phase voltage and the temperature of the power module to be tested.
In the passive network load test system of the power module, the reactive load network adopts three star-connected three-phase inductors as loads of the power module to be tested, so that when the power module to be tested modulates phase voltages with corresponding frequencies and amplitudes, phase currents with corresponding magnitudes and frequencies are generated on the three-phase inductors.
The passive network load testing system of the power module further comprises a radiator, wherein the radiator is arranged in the test bench and positioned below the power module to be tested and is used for achieving heat dissipation of the power module to be tested.
The passive network load test system of the power module further comprises input and output equipment, wherein the input and output equipment is arranged on the test bench and is connected with the computer through a signal transmission line.
In the passive network load test system of the power module, the input and output equipment comprises a mouse, a keyboard and a display screen.
In the passive network load test system of the power module, the system work flow is as follows:
Setting a test mode and test parameters through input and output equipment, wherein the test mode comprises a vector test mode of a permanent magnet synchronous motor, a VF test mode of an asynchronous motor and a reactive test mode;
The computer sends the received test mode and test parameters to the singlechip;
The singlechip generates a corresponding control signal according to the received test mode and test parameters, wherein if the test mode is a vector test mode of the permanent magnet synchronous motor, the singlechip generates a SVPWM control signal based on a rotating speed and current double closed loops by adjusting the setting of the maximum value of the rotating speed and the phase current, and inputs the SVPWM control signal to a driving circuit board, and if the test mode is an VF test mode of an asynchronous motor, the singlechip generates a VF curve required by the VF test mode by adjusting the frequency and the size setting of the phase voltage, and generates a corresponding SPWM1 control signal, and inputs the SPWM1 control signal to the driving circuit board;
the driving circuit receives a control signal sent by the singlechip, outputs the control signal to the power module to be tested after driving amplification, and drives the power module to be tested so that the power module to be tested works under the condition required by the test mode;
the reactive load network automatically modulates out three-phase sinusoidal current after receiving the phase voltage modulated by the power module to be tested;
The phase voltage, the phase current and the temperature during operation of the power module to be tested are acquired through the voltage and current detection module, and the acquired data are subjected to analog-to-digital conversion to obtain digital signals;
and the computer processes and analyzes the digital signal and displays the analysis result.
The invention has the following advantages:
(1) The invention discloses a passive network load test system of a power module, which can simulate various dynamic parameters of the power module, especially temperature change in dynamic operation, through a reactive load network under the condition of not using a motor. The state data of the power module is obtained by analyzing the test result, and the data is stored in a memory of a computer, and meanwhile, analysis and processing comments are obtained.
(2) The invention discloses a passive network load test system of a power module, which can verify whether the load condition of the power module is matched with the thermal design through a reactive load network.
(3) The invention discloses a passive network load test system of a power module, which utilizes a reactive load network to enable the effective value of phase current of the power module to achieve the effect of simulating the working state of a motor through a control algorithm, realizes the application verification of the power module in different occasions, solves the problem of load verification of the power module, further evaluates the reliability of the power module and further optimizes the design of the power module.
Drawings
FIG. 1 is a block diagram of a passive network load test system for a power module in accordance with an embodiment of the present invention;
fig. 2 is an installation schematic diagram of a passive network load test system of a power module according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the embodiments of the present invention disclosed herein will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1-2, in the embodiment, the passive network load test system of the power module comprises a test board 1, a singlechip 2, a driving circuit board 3, a computer 5, a serial communication interface 6, a power module to be tested 7, a voltage and current detection module 8 and a reactive load network 10. The single chip microcomputer 2 and the driving circuit board 3 are arranged in the test board 1, the single chip microcomputer 2 is connected with the driving circuit board 3 through a signal transmission line and connected with the computer 5 through a serial port communication interface 6, the power module 7 to be tested is arranged on the test board 1, the power module 7 to be tested is connected with the driving circuit board 3 through the signal transmission line, the power module 7 to be tested is connected with the reactive load network 10 through a wiring terminal and a direct current bus, and a voltage and current detection module 8 is arranged between the power module 7 to be tested and the reactive load network 10.
In this embodiment, the voltage and current detection module 8 is configured to detect a temperature, a phase current, and a phase voltage of the power module 7 to be detected, collect detection data, perform analog-to-digital conversion on the detection data to obtain a digital signal, and send the digital signal to the singlechip 2. The single chip microcomputer 2 is used for carrying out filtering and averaging processing on the digital signals sent by the voltage and current detection module 8, and sending the processed data to the computer 5 through the serial communication interface 6 and the driving circuit board 3 through the signal transmission line. And the computer 5 is used for analyzing the processed data sent by the singlechip 2 to obtain the current temperature, the phase current and the phase voltage of the power module 7 to be tested, and displaying and storing the current temperature, the phase current and the phase voltage. The driving circuit board 3 is used for driving the power module 7 to be tested according to the processed data sent by the singlechip 2 and combining with the preset expected phase current, so that the power module 7 to be tested generates the phase current consistent with the expected phase current. The reactive load network 10 is used for providing load for the power module 7 to be tested.
In this embodiment, the passive network load test system of the power module may further include a heat sink 9 and an input-output device 4. The radiator 9 is installed in the test board 1 and located below the power module 7 to be tested, and is used for implementing heat dissipation of the power module 7 to be tested. The input/output device 4 is mounted on the test bench 1 and connected to the computer 5 via a signal transmission line. The input/output device 4 includes, but is not limited to, a mouse, a keyboard, a display screen, etc., and the user can implement a test mode and adjustment of test parameters (adjustment can be performed through a menu operation) based on the mouse and the keyboard, and the display screen can display the current working state of the power module to be tested, including working voltage, working frequency, working current, etc.
In this embodiment, the test bench 1 is a semi-open box structure, the single chip microcomputer 2, the driving circuit board 3 and the like are installed in the box, the mouse, the keyboard, the display screen and the like are installed outside the box, and the radiator is installed at the semi-open part of the box. The radiator 9 is made of aluminum, and bolt holes are reserved on the radiator and are used for installing different power modules to be tested.
In this embodiment, the voltage and current detection module 8 mainly includes a hall current sensor, a voltage sensor, and a temperature sensor, which are respectively used for measuring and obtaining the phase current, the phase voltage, and the temperature of the power module 7 to be measured.
In this embodiment, the reactive load network 10 uses three star-connected three-phase inductors (three high-power air-core inductors, without magnetic saturation phenomenon) as the load of the power module 7 to be tested, so as to generate phase currents with corresponding magnitudes and frequencies on the three-phase inductors when the power module 7 to be tested modulates the phase voltages with corresponding frequencies and magnitudes.
In this embodiment, the system workflow is as follows:
The test mode and the test parameters are set by the input-output device 4. The test mode mainly comprises a vector test mode of the permanent magnet synchronous motor, a VF test mode of the asynchronous motor and a reactive test mode, and the test parameters mainly comprise a switching frequency, a load current and a direct current input voltage.
The computer 5 sends the received test pattern and test parameters to the singlechip 2.
The singlechip 2 generates corresponding control signals according to the received test mode and test parameters. The single chip microcomputer 2 generates SVPWM control signals based on a rotating speed and a double closed loop of phase current by adjusting the setting of the maximum value of the rotating speed and the maximum value of the phase current and inputs the SVPWM control signals to the driving circuit board 3, the single chip microcomputer 2 generates VF curves required by the VF test mode by adjusting the frequency and the setting of the phase voltage and inputs the SPWM1 control signals to the driving circuit board 3 if the test mode is the asynchronous motor VF test mode, and the single chip microcomputer 2 generates VF curves required by the reactive test mode by adjusting the frequency and the setting of the phase voltage and generates corresponding SPWM2 control signals and inputs the SPWM2 control signals to the driving circuit board 3 if the test mode is the reactive test mode.
After receiving the control signal sent by the singlechip 2, the driving circuit 3 outputs the control signal to the power module 7 to be tested after driving and amplifying, and drives the power module 7 to be tested, so that the power module 7 to be tested works under the condition required by the test mode.
The reactive load network 10 automatically modulates three-phase sinusoidal current after receiving the phase voltage modulated by the power module 7 to be tested.
The phase voltage, the phase current and the temperature of the power module 7 to be detected are acquired through the voltage and current detection module 8, the acquired data are subjected to analog-to-digital conversion to obtain digital signals, and the digital signals are sent to the singlechip 2.
The computer 5 processes and analyzes the digital signal and displays the analysis result. The computer can analyze the digital signals to form analysis treatment opinion, and evaluate the reliability of the power module to be tested. For example, the loss of the power module to be tested can be calculated:
PLOSS=IVT
wherein P LOSS represents the phase current, V represents the phase voltage, and T represents the phase current and the phase voltage overlap time.
Although the present invention has been described in terms of the preferred embodiments, it is not intended to be limited to the embodiments, and any person skilled in the art can make any possible variations and modifications to the technical solution of the present invention by using the methods and technical matters disclosed above without departing from the spirit and scope of the present invention, so any simple modifications, equivalent variations and modifications to the embodiments described above according to the technical matters of the present invention are within the scope of the technical matters of the present invention.
What is not described in detail in the present specification belongs to the known technology of those skilled in the art.
Claims (8)
1. A passive network load test system of a power module is characterized by comprising a test bench (1), a singlechip (2), a driving circuit board (3), a computer (5), a serial port communication interface (6), a power module to be tested (7), a voltage and current detection module (8) and a reactive load network (10), wherein the singlechip (2) and the driving circuit board (3) are arranged in the test bench (1), the singlechip (2) is connected with the driving circuit board (3) through a signal transmission line and is connected with the computer (5) through the serial port communication interface (6), the power module to be tested (7) is arranged on the test bench (1), the power module to be tested (7) is connected with the driving circuit board (3) through the signal transmission line, the power module to be tested (7) is connected with the reactive load network (10) through a connecting terminal and a direct current bus, and the voltage and current detection module (8) is arranged between the power module to be tested (7) and the reactive load network (10).
2. The passive network load testing system of a power module of claim 1, wherein,
The voltage and current detection module (8) is used for detecting the temperature, the phase current and the phase voltage of the power module (7) to be detected and acquiring detection data;
The singlechip (2) is used for carrying out filtering and averaging processing on the digital signals sent by the voltage and current detection module (8), sending the processed data to the computer (5) through the serial port communication interface (6) and sending the processed data to the driving circuit board (3) through the signal transmission line;
The computer (5) is used for analyzing the processed data sent by the singlechip (2) to obtain the current temperature, the phase current and the phase voltage of the power module (7) to be tested, and displaying and storing the current temperature, the phase current and the phase voltage;
The driving circuit board (3) is used for driving the power module to be tested (7) according to processed data sent by the singlechip (2) and combining with preset expected phase current, so that the power module to be tested (7) generates phase current consistent with the expected phase current;
and the reactive load network (10) is used for providing load for the power module (7) to be tested.
3. The passive network load test system of the power module according to claim 2, wherein the voltage and current detection module (8) comprises a Hall current sensor, a voltage sensor and a temperature sensor, which are respectively used for measuring and obtaining the phase current, the phase voltage and the temperature of the power module (7) to be tested.
4. The passive network load test system of a power module according to claim 2, characterized in that the reactive load network (10) uses three-phase inductors connected in star as the load of the power module (7) to be tested, so as to generate phase currents of corresponding magnitude and frequency on the three-phase inductors when the power module (7) to be tested modulates phase voltages of corresponding frequency and amplitude.
5. The passive network load test system of the power module according to claim 1, further comprising a radiator (9), wherein the radiator (9) is installed in the test bench (1) and is located below the power module to be tested (7) and is used for achieving heat dissipation of the power module to be tested (7).
6. The passive network load test system of the power module according to claim 1, further comprising an input/output device (4), wherein the system is mounted on a test bench (1) and is connected with a computer (5) through a signal transmission line.
7. The passive network load testing system of a power module according to claim 6, wherein the input output device (4) comprises a mouse, a keyboard and a display screen.
8. The passive network load testing system of a power module of claim 6, wherein the system workflow is as follows:
setting a test mode and test parameters through input and output equipment (4), wherein the test mode comprises a permanent magnet synchronous motor vector test mode, an asynchronous motor VF test mode and a reactive test mode, and the test parameters comprise a switching frequency, a load current and a direct current input voltage;
the computer (5) sends the received test mode and test parameters to the singlechip (2);
The single chip microcomputer (2) generates corresponding control signals according to the received test mode and test parameters, wherein if the test mode is a vector test mode of the permanent magnet synchronous motor, the single chip microcomputer (2) generates SVPWM control signals based on a rotating speed and current double closed loop through adjusting the setting of the maximum value of the rotating speed and the phase current, and inputs the SVPWM control signals to the driving circuit board (3), if the test mode is an VF test mode of the asynchronous motor, the single chip microcomputer (2) generates VF curves required by the VF test mode through adjusting the frequency and the size setting of the phase voltage, and generates corresponding SPWM1 control signals, and inputs the SPWM1 control signals to the driving circuit board (3), and if the test mode is a reactive test mode, the single chip microcomputer (2) generates curves required by the reactive test mode through adjusting the frequency and the size setting of the phase voltage, generates corresponding SPWM2 control signals, and inputs the SPWM2 control signals to the driving circuit board (3);
the driving circuit (3) receives a control signal sent by the singlechip (2), outputs the control signal to the power module to be tested (7) after driving amplification, and drives the power module to be tested (7) to enable the power module to be tested (7) to work under the condition required by the test mode;
The reactive load network (10) automatically modulates three-phase sinusoidal current after receiving the phase voltage modulated by the power module (7) to be tested;
The phase voltage and the phase current of the power module (7) to be detected and the temperature during operation are acquired through the voltage and current detection module (8), and the acquired data are subjected to analog-to-digital conversion to obtain digital signals;
The computer (5) processes and analyzes the digital signal and displays the analysis result.
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| CN202411740658.6A CN119738627A (en) | 2024-11-29 | 2024-11-29 | A passive network load test system for power modules |
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| CN202411740658.6A CN119738627A (en) | 2024-11-29 | 2024-11-29 | A passive network load test system for power modules |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101666836A (en) * | 2008-09-03 | 2010-03-10 | 海尔集团公司 | System and method for testing power module |
| CN102075138A (en) * | 2011-01-21 | 2011-05-25 | 深圳飞能能源有限公司 | Charging and discharging control system and method of flywheel battery |
| CN103267945A (en) * | 2013-04-16 | 2013-08-28 | 上海电机系统节能工程技术研究中心有限公司 | Variable-frequency power source for multifunctional variable frequency motor test and waveform generation method |
| CN107346890A (en) * | 2017-07-15 | 2017-11-14 | 国网河南省电力公司焦作供电公司 | A kind of idle static generator SVG, decoupling method and coordination approach in parallel |
| CN213957488U (en) * | 2020-10-30 | 2021-08-13 | 杭州士兰微电子股份有限公司 | Power module simulation test system and new energy automobile's test system |
-
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- 2024-11-29 CN CN202411740658.6A patent/CN119738627A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666836A (en) * | 2008-09-03 | 2010-03-10 | 海尔集团公司 | System and method for testing power module |
| CN102075138A (en) * | 2011-01-21 | 2011-05-25 | 深圳飞能能源有限公司 | Charging and discharging control system and method of flywheel battery |
| CN103267945A (en) * | 2013-04-16 | 2013-08-28 | 上海电机系统节能工程技术研究中心有限公司 | Variable-frequency power source for multifunctional variable frequency motor test and waveform generation method |
| CN107346890A (en) * | 2017-07-15 | 2017-11-14 | 国网河南省电力公司焦作供电公司 | A kind of idle static generator SVG, decoupling method and coordination approach in parallel |
| CN213957488U (en) * | 2020-10-30 | 2021-08-13 | 杭州士兰微电子股份有限公司 | Power module simulation test system and new energy automobile's test system |
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