CN114184926A - Testing device for frequency converter power switch tube assembly - Google Patents
Testing device for frequency converter power switch tube assembly Download PDFInfo
- Publication number
- CN114184926A CN114184926A CN202111312328.3A CN202111312328A CN114184926A CN 114184926 A CN114184926 A CN 114184926A CN 202111312328 A CN202111312328 A CN 202111312328A CN 114184926 A CN114184926 A CN 114184926A
- Authority
- CN
- China
- Prior art keywords
- tube assembly
- current
- switch tube
- power switch
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2601—Apparatus or methods therefor
Abstract
The invention discloses a testing device for a frequency converter power switch tube assembly, which comprises a control unit, a control unit and a power supply unit, wherein the control unit is used for adding direct-current bus voltage to a collector and an emitter of the frequency converter power switch tube assembly and collecting the voltage and current at an alternating-current end of the frequency converter power switch tube assembly; the detection unit is connected with the control unit, receives signals transmitted by the control unit, converts current into current power information, is internally provided with a power threshold value in advance, compares the current power information with the power threshold value, judges whether the power switch tube is normal or not by comparing whether the shape of a comparison waveform is the same or not, tests the power switch tube, is simpler, more convenient and quicker in test process, does not need to consume a large amount of time instruments and meters, is favorable for improving maintenance efficiency, can generate test pulses with different and various frequencies, tests the frequency converter power switch tube assembly, and is favorable for ensuring the accuracy of test results.
Description
Technical Field
The invention relates to the technical field of frequency converter testing, in particular to a testing device for a frequency converter power switch tube assembly.
Background
The frequency converter (VFD) is a power control device that applies frequency conversion technology and microelectronic technology and controls an ac motor by changing the frequency of a working power supply of the motor, and is mainly composed of a rectifier (ac to dc), a filter, an inverter (dc to ac), a brake unit, a drive unit, and a detection unit microprocessor unit, etc., and adjusts the voltage and frequency of an output power supply by turning on and off an internal power switch tube, and provides the required power supply voltage according to the actual needs of the motor, thereby achieving the purposes of energy saving and speed regulation. With the continuous improvement of the industrial automation degree, the frequency converter is also widely applied.
At present, in the process of overhauling a power frequency converter of a wind turbine generator, a technician tests a power switch tube assembly of a core component of the frequency converter, the required signal quantity is various, the testing precision is high, a distributed instrument and meter is used for testing in the past testing process, the process is complicated, the overhauling personnel needs to spend a large amount of time (more than 80% of the testing time) to debug the instrument and meter, and the overhauling efficiency of the overhauling personnel is low.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
Therefore, the technical problems to be solved by the invention are as follows: the maintainer adopts distributed instrument and meter to test converter core part power switch tube assembly, and the process is too loaded down with trivial details, and the maintainer need consume a large amount of time, and maintenance efficiency is very low.
In order to solve the technical problems, the invention provides the following technical scheme: the testing device for the frequency converter power switch tube assembly comprises a control unit, a control unit and a power supply unit, wherein the control unit is used for adding direct-current bus voltage to a collector and an emitter of the frequency converter power switch tube assembly and collecting voltage and current at an alternating-current end of the frequency converter power switch tube assembly; the detection unit is connected with the control unit, receives the signal transmitted by the control unit, converts the current into current power information, is preset with a power threshold value, and compares the current power information with the power threshold value.
As the preferred scheme of the frequency converter power switch tube assembly testing device, the frequency converter power switch tube assembly testing device comprises the following components: the control unit comprises an energy supply module for supplying current; the conversion module is electrically connected with the energy supply module, converts the current and inputs the converted current to a collector and an emitter of the frequency converter power switch tube assembly; the acquisition module is electrically connected with the alternating current end of the frequency converter power switch tube assembly and is used for acquiring a current voltage signal of the alternating current end of the frequency converter power switch tube assembly; and the transmission module transmits the current and voltage signals acquired by the acquisition module and is electrically connected with the acquisition module.
As the preferred scheme of the frequency converter power switch tube assembly testing device, the frequency converter power switch tube assembly testing device comprises the following components: the conversion module comprises a processor, and the processor receives the current generated by the energy supply module and converts the current into a test pulse matched with the frequency converter power switch tube assembly; and the driving circuit converts and amplifies the test pulse, inputs the amplified test pulse into the control end of the frequency converter power switch tube assembly, and performs effective drive test on the frequency converter power switch tube assembly.
As the preferred scheme of the frequency converter power switch tube assembly testing device, the frequency converter power switch tube assembly testing device comprises the following components: the acquisition module comprises an acquisition circuit, and the acquisition circuit acquires current and voltage signals at the output end of the frequency converter power switch tube assembly; and the acquisition circuit inputs the acquired current and voltage signals into the analog-to-digital converter, and the analog-to-digital converter converts the current and voltage signals into digital signals and inputs the digital signals into the transmission module.
As the preferred scheme of the frequency converter power switch tube assembly testing device, the frequency converter power switch tube assembly testing device comprises the following components: the detection unit comprises a receiving module, and the transmission module and the receiving module are linked to receive and identify the digital signals transmitted by the transmission module; and the receiving module inputs the digital signal to the analysis module.
As the preferred scheme of the frequency converter power switch tube assembly testing device, the frequency converter power switch tube assembly testing device comprises the following components: the receiving module is electrically connected with the analysis module.
As the preferred scheme of the frequency converter power switch tube assembly testing device, the frequency converter power switch tube assembly testing device comprises the following components: and a preset power threshold is arranged in the analysis module.
As the preferred scheme of the frequency converter power switch tube assembly testing device, the frequency converter power switch tube assembly testing device comprises the following components: and after the analysis module obtains the current power information, accessing the power threshold.
As the preferred scheme of the frequency converter power switch tube assembly testing device, the frequency converter power switch tube assembly testing device comprises the following components: the processor generates test pulse signals of different frequencies.
As the preferred scheme of the frequency converter power switch tube assembly testing device, the frequency converter power switch tube assembly testing device comprises the following components: and dead time is arranged in the processor.
The invention has the beneficial effects that: can use portable power source to provide the test power consumption, it is more convenient to use, current-voltage signal through analysis module with receiving, convert digital signal into, generate sinusoidal waveform through the pulse width modulation technique, visit with the sinusoidal waveform that original power threshold value predetermines, whether the shape through comparing the comparison waveform is the same, just can judge whether power switch tube is normal, accomplish to power switch tube and test, the test process is more simple and convenient rapid, need not to consume a large amount of time instrument and meter, be favorable to improving maintenance efficiency, and can generate the test pulse of different multiple different frequencies, test frequency converter power switch tube assembly, be favorable to guaranteeing test result's accuracy.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and those skilled in the art will be able to obtain other drawings based on these drawings without inventive exercise. Wherein:
fig. 1 is an overall circuit diagram of the first embodiment.
Fig. 2 is a circuit diagram of the control unit and the detection unit in the first and second embodiments.
Fig. 3 is a circuit diagram of the pulse width modulation in the second and third embodiments.
Fig. 4 is a diagram of a sine wave newly generated by the analysis module in the second and third embodiments.
Fig. 5 is a diagram showing sine waves preset in the analysis module in the second and third embodiments.
Fig. 6 is a circuit diagram of a control unit in the second and third embodiments.
Fig. 7 is a circuit diagram of an acquisition circuit in a second embodiment.
Fig. 8 is a circuit diagram of a driving circuit in the second embodiment.
Fig. 9 is a circuit diagram of an analysis module in a second embodiment.
FIG. 10 is a SPWM generation schematic in a second embodiment.
Fig. 11 is a schematic diagram of dead time setting in the second embodiment.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 and 2, for a first embodiment of the present invention, this embodiment provides a testing apparatus for a power switch tube assembly of a frequency converter, which includes a control unit 100, applying a dc bus voltage to a collector and an emitter of the power switch tube assembly a of the frequency converter, using an existing storage battery or dry battery as a power supply, and connecting the dc bus voltage to the collector and the emitter of the power switch tube assembly a of the frequency converter, where the power switch tube assembly a of the frequency converter is a core component of the frequency converter, the power tube is one of a class of triodes, the collector and the emitter are two poles of a triode, and an existing igbt (insulated Gate Bipolar transistor) may be used; the voltage and the current of the alternating current end of the frequency converter power switch tube assembly A are collected, the alternating current end of the frequency converter power switch tube assembly is electrically connected with the control unit 100, the voltage and the current information can be collected by the control unit 100, and the collected information is transmitted to the detection unit 200.
The detection unit 200 is connected to the control unit 100, receives the signal transmitted by the control unit 100, converts the current into current power information, uses the existing analog-to-digital converter (i.e. analog-to-digital converter, i.e. a/D converter, or ADC for short, usually refers to an electronic component ADC that converts an analog signal into a digital signal) in the detection unit 200, generates a pulse width modulation waveform by using the existing pulse width modulation technique, generates a sine wave (pulse width modulation is to control the on/off of the switching device of the inverter circuit, so that the output end obtains a series of pulses with equal amplitude but inconsistent width, and uses these pulses to replace the sine wave or the required waveform, i.e. generates a plurality of pulses in the half cycle of the output waveform, so that the equivalent voltage of each pulse is a sine waveform, and the obtained output is smooth and has few low-order harmonics), converts the current received from the control unit 100 into a sine waveform, the power threshold is preset in the detection unit 200, the power threshold is a sine waveform preset in the detection unit 200, and the sine waveform of the current power information is mainly compared with the sine waveform preset in the power threshold, and if the shapes of the waveforms are the same, whether the power switch tube is normal can be judged, and the power switch tube is tested.
Example 2
Referring to fig. 2 to 11, in a second embodiment of the present invention, which is based on the previous embodiment, the control unit 100 includes an energy supply module 101, where the energy supply module 101 is used to supply current, and may use an existing battery or dry battery as a power source, and use a dc power source; conversion module 102 and energy supply module 101 electric connection, convert the electric current, amplify the electric current, make the electric current can be used for effectively driving converter power switch tube assembly A (because wind turbine generator system power converter, generally adopt high-power converter, directly adopt the mode of portable power source input, be not enough to carry out the complete drive to the power switch tube), and input converter power switch tube assembly A's collecting electrode and projecting electrode with the electric current after the conversion, the electric current after the amplification gets into from converter power switch tube assembly A's collecting electrode and projecting electrode.
In this embodiment, the acquisition module 103 is electrically connected to an ac terminal of the converter power switching tube assembly a, acquires a current-voltage signal at the ac terminal of the converter power switching tube assembly a, acquires a current-voltage signal at an output terminal of the converter power switching tube assembly a through the acquisition circuit 103a, inputs the acquired current-voltage signal to the analog-to-digital converter 103b, converts the current-voltage signal into a digital signal by the analog-to-digital converter 103b, and inputs the digital signal to the transmission module 104, the transmission module 104 transmits the current-voltage signal acquired by the acquisition module 103, and the transmission module 104 is electrically connected to the acquisition module 103.
In the embodiment, the conversion module 102 comprises a processor 102a, the processor 102a adopts an existing TMS320F2802732 bit processor, the processor 102a receives the current generated from the energy supply module 101 and converts the current into a test pulse capable of matching with the frequency converter power switch tube assembly a, a pin on the TMS320F2802732 bit processor is connected with an existing storage battery or dry battery, and the TMS320F2802732 bit processor is capable of converting the current into a test pulse capable of matching with the frequency converter power switch tube assembly a and converting the test pulse into a plurality of test pulses with different frequencies; drive circuit 102b can be amplified through the conversion to test pulse, and the pin on the TMS320F2802732 bit treater and drive circuit 102b electric connection, drive circuit 102b amplify test pulse, make test pulse can be used for carrying out effective drive to converter power switch tube assembly A, input converter power switch tube assembly A control end, carry out effective drive test to converter power switch tube assembly A.
In this embodiment, the acquisition module 103 includes an acquisition circuit 103a, the acquisition circuit 103a acquires a current-voltage signal at an output end of the frequency converter power switch tube assembly a, and the acquisition circuit 103a uses a differential amplifier and a voltage follower as a design main line to realize acquisition and shaping of a current; the acquisition circuit 103a inputs the acquired current and voltage signals into the existing analog-to-digital converter 103b, the analog-to-digital converter 103b converts the current and voltage signals into digital signals, the digital signals are input into the transmission module 104, the analog-to-digital converter 103b is electrically connected with pins of the transmission module 104, and the digital signals can be transmitted through the transmission module 104.
In this embodiment, the detecting unit 200 includes a receiving module 201, a connection is established between the transmitting module 104 and the receiving module 201, the transmitting module 104 and the receiving module 201 may be in a wireless connection manner, so that the use is more convenient, and the receiving module 201 receives and identifies the digital signal transmitted by the transmitting module 104; the analysis module 202 converts the digital signal into current power information, the receiving module 201 inputs the digital signal to the analysis module 202, and the analysis module 202 generates a pulse width modulation waveform through the existing pulse width modulation technology.
In the embodiment, the receiving module 201 is electrically connected to the analyzing module 202, and the receiving module 201 can input the digital signal to the analyzing module 202.
In this embodiment, a preset power threshold is set in the analysis module 202, the power threshold is a sine waveform preset in the detection unit 200, a normal inverter power switch tube assembly a is used in advance, a driving test is performed with a test pulse, then test information is collected, a sine waveform is generated through a pulse width modulation technique, the analysis module 202 converts a digital signal into current power information, that is, a current voltage signal collected at an alternating current end of the inverter power switch tube assembly a to be detected is converted into a digital signal, a sine waveform is generated through the pulse width modulation technique, and the sine waveform is accessed with the sine waveform preset by the original power threshold.
In the embodiment of the present invention, the processor 102a generates the test pulse signals with different frequencies, and by generating the test pulse signals with different frequencies, the test pulse signals with different frequencies required by the power switch tube test are satisfied, which is beneficial to ensuring the accuracy of the test result.
In the embodiment, the processor 102a is provided with a dead time (the dead time in the IGBT driving signal is usually used for avoiding false triggering when the power switch control signal is inverted), many power management chips control one or more external power devices, such as MOSFET or IGBT, by detecting a feedback current or a feedback voltage, which is often influenced by noise generated when the power device is switched, resulting in that some spike caused by wire parasitic inductance and chip parasitic capacitance is superimposed on a signal input to the chip, which may cause false triggering inside the chip and output a wrong control signal, and in order to avoid the influence of spike noise, an operational circuit of the feedback signal is usually shielded within a period from the inversion of the control signal to the stabilization of the feedback signal, the period of time is dead time), a TMS320F2802732 bit processor is used for outputting two paths of complementary SPWMs to drive an upper bridge arm and a lower bridge arm of a power switch tube, wherein the frequencies (periods) of the driving pulses are the same, the duty ratios of the output pulses are independently adjustable, the output pulses are always synchronous, and meanwhile, the dead time can be conveniently set for the waveforms of the two paths of SPWMs so as to ensure that the upper bridge arm and the lower bridge arm of the power switch tube cannot be simultaneously conducted and broken down (in the invention, 24MHZ clock frequency is adopted, the PWM period is 2400, the amplitude of a sine table is 2300, 60 clocks are upwardly deviated, a sine sampling point is 200, and the frequency of the output sine wave is 24000000/2400/200 which is 50 HZ).
Example 3
Referring to fig. 3 to 6, in a third embodiment of the present invention, based on the above two embodiments, when in use, an existing storage battery or dry battery is used as a power supply, a dc power supply is used, the processor 102a receives a current generated from the energy supply module 101, converts the current into a test pulse capable of matching with the frequency converter power switch tube assembly a, and converts the test pulse into a plurality of test pulses with different frequencies, the processor 102a uses an existing TMS320F2802732 bit processor, a pin on the TMS320F2802732 bit processor is electrically connected to the driving circuit 102b, the driving circuit 102b amplifies the test pulse, so that the test pulse can be used to effectively drive the frequency converter power switch tube assembly a, a current and voltage signal at an output end of the frequency converter power switch tube assembly a is collected by the collecting circuit 103a, the collecting circuit 103a uses a differential amplifier and a voltage follower as a design main line, the collection and shaping of the current are realized; the acquired current and voltage signals are input into an existing analog-to-digital converter 103b, and the analog-to-digital converter 103b converts the current and voltage signals into digital signals and inputs the digital signals into a transmission module 104.
The transmission module 104 and the receiving module 201 are linked, the transmission module 104 and the receiving module 201 can be in a wireless connection mode, and the use is more convenient, the receiving module 201 receives the digital signal transmitted by the transmission module 104, the analysis module 202 converts the digital signal into current power information, the analysis module 202 generates a pulse width modulation waveform by the existing pulse width modulation technology, a preset power threshold is arranged in the analysis module 202, the power threshold is a sine waveform preset in the detection unit 200, a normal frequency converter power switch tube assembly A is used in advance, a driving test is carried out by using a test pulse, then test information is collected, the sine waveform generated by the pulse width modulation technology is converted into current power information by the analysis module 202, namely the collected current voltage signal is collected at the alternating current end of the frequency converter power switch tube assembly A to be detected, convert into digital signal, through pulse width modulation technique generation sinusoidal waveform, visit with the sinusoidal waveform that original power threshold value was predetermine, whether the shape through comparing the contrast wave form is the same, just can judge whether normal, accomplish the test to the power switch tube, the testing process is more simple and convenient rapid, need not to consume a large amount of time instrument and meter, be favorable to improving maintenance efficiency, and can generate the test pulse of different multiple different frequencies, test frequency converter power switch tube assembly A, be favorable to guaranteeing the accuracy of test result.
It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.
Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. Converter power switch tube assembly testing arrangement, its characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
the control unit (100) is used for adding the direct-current bus voltage to a collector and an emitter of the frequency converter power switch tube assembly (A) and collecting the voltage and the current of an alternating-current end of the frequency converter power switch tube assembly;
the detection unit (200) is connected with the control unit (100), receives signals transmitted by the control unit (100), converts current into current power information, is preset with a power threshold in the detection unit (200), and compares the current power information with the power threshold.
2. The inverter power switching tube assembly testing apparatus of claim 1, wherein: the control unit (100) comprises,
an energy supply module (101), the energy supply module (101) being configured to provide an electric current;
the conversion module (102) is electrically connected with the energy supply module (101), converts current and inputs the converted current to a collector and an emitter of the frequency converter power switch tube assembly (A);
the acquisition module (103) is electrically connected with the alternating current end of the frequency converter power switch tube assembly (A) and is used for acquiring a current and voltage signal of the alternating current end of the frequency converter power switch tube assembly (A);
the transmission module (104) transmits the current and voltage signals acquired by the acquisition module (103), and the transmission module (104) is electrically connected with the acquisition module (103).
3. The inverter power switching tube assembly testing apparatus of claim 2, wherein: the conversion module (102) comprises a conversion module,
a processor (102a), wherein the processor (102a) receives the current generated from the energy supply module (101) and converts the current into a test pulse which can be matched with the frequency converter power switch tube assembly (A);
and the driving circuit (102b) converts and amplifies the test pulse, inputs the test pulse into the control end of the frequency converter power switch tube assembly (A), and performs effective drive test on the frequency converter power switch tube assembly (A).
4. The inverter power switching tube assembly testing apparatus of claim 3, wherein: the acquisition module (103) comprises a digital image acquisition module,
the acquisition circuit (103a) acquires a current and voltage signal at the output end of the frequency converter power switch tube assembly (A);
the acquisition circuit (103a) inputs the acquired current and voltage signals to the analog-to-digital converter (103b), and the analog-to-digital converter (103b) converts the current and voltage signals into digital signals and inputs the digital signals to the transmission module (104).
5. The inverter power switching tube assembly testing apparatus of claim 4, wherein: the detection unit (200) comprises a detector unit,
the receiving module (201), the said transmission module (104) establishes the relation with receiving module (201), receive the digital signal transmitted by the transmission module (104), and discern;
and the analysis module (202) is used for converting the digital signal into current power information, and the receiving module (201) is used for inputting the digital signal into the analysis module (202).
6. The inverter power switching tube assembly testing apparatus of claim 5, wherein: the receiving module (201) is electrically connected with the analyzing module (202).
7. The inverter power switching tube assembly testing apparatus of claim 6, wherein: a preset power threshold value is arranged in the analysis module (202).
8. The inverter power switching tube assembly testing apparatus of claim 7, wherein: the analysis module (202) accesses the power threshold after obtaining current power information.
9. The inverter power switching tube assembly testing apparatus of claim 3, wherein: the processor (102a) generates test pulse signals of different frequencies.
10. The inverter power switching tube assembly testing apparatus of claim 8, wherein: dead time is provided within the processor (102 a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111312328.3A CN114184926A (en) | 2021-11-08 | 2021-11-08 | Testing device for frequency converter power switch tube assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111312328.3A CN114184926A (en) | 2021-11-08 | 2021-11-08 | Testing device for frequency converter power switch tube assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114184926A true CN114184926A (en) | 2022-03-15 |
Family
ID=80601923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111312328.3A Pending CN114184926A (en) | 2021-11-08 | 2021-11-08 | Testing device for frequency converter power switch tube assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114184926A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101762778A (en) * | 2009-12-30 | 2010-06-30 | 株洲南车时代电气股份有限公司 | Power module test system and test method thereof |
| US20100164735A1 (en) * | 2008-12-31 | 2010-07-01 | Caterpillar Inc. | System And Method For Testing Power Transistors |
| CN202614834U (en) * | 2011-11-30 | 2012-12-19 | 中国北车股份有限公司大连电力牵引研发中心 | Insulated gate bipolar transistor (IGBT) over-current protection value test device and device used to test IGBT over-current protection value in electric locomotive traction circuit |
| CN109901039A (en) * | 2019-03-29 | 2019-06-18 | 国网上海市电力公司 | A kind of converter valve thyristor presses component test set and method |
| CN110441668A (en) * | 2019-08-19 | 2019-11-12 | 西安易恩电气科技有限公司 | A kind of high-power IGBT test macro |
| CN113589128A (en) * | 2021-08-06 | 2021-11-02 | 湖南大学 | Short-circuit fault detection method for SiC MOSFET power module |
-
2021
- 2021-11-08 CN CN202111312328.3A patent/CN114184926A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100164735A1 (en) * | 2008-12-31 | 2010-07-01 | Caterpillar Inc. | System And Method For Testing Power Transistors |
| CN101762778A (en) * | 2009-12-30 | 2010-06-30 | 株洲南车时代电气股份有限公司 | Power module test system and test method thereof |
| CN202614834U (en) * | 2011-11-30 | 2012-12-19 | 中国北车股份有限公司大连电力牵引研发中心 | Insulated gate bipolar transistor (IGBT) over-current protection value test device and device used to test IGBT over-current protection value in electric locomotive traction circuit |
| CN109901039A (en) * | 2019-03-29 | 2019-06-18 | 国网上海市电力公司 | A kind of converter valve thyristor presses component test set and method |
| CN110441668A (en) * | 2019-08-19 | 2019-11-12 | 西安易恩电气科技有限公司 | A kind of high-power IGBT test macro |
| CN113589128A (en) * | 2021-08-06 | 2021-11-02 | 湖南大学 | Short-circuit fault detection method for SiC MOSFET power module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101034117A (en) | Power transmission line power frequency parameters measuring method and device | |
| CN109884492A (en) | A kind of test device of power MOSFET device avalanche capability | |
| CN102749505A (en) | Method and device for voltage proportion measurement | |
| CN116743169A (en) | Test method for testing parameters of high-speed ADC (analog to digital converter) chip | |
| CN106501691B (en) | Portable high-voltage frequency converter power unit comprehensive detection device | |
| CN210217999U (en) | PDIV pulse testing system for insulation of wind driven generator | |
| CN103604500A (en) | Detection system and detection method for raster scanning type spectrograph | |
| CN103630749A (en) | Harmonic injection device for harmonic impedance measurement of power grid | |
| CN111308232B (en) | System and method for measuring stray parameters of current loop of high-power current conversion module | |
| CN114184926A (en) | Testing device for frequency converter power switch tube assembly | |
| CN211206700U (en) | IGBT drive module dipulse testing arrangement | |
| CN207366633U (en) | plasma probe measurement and control system | |
| CN202772870U (en) | Arbitrary waveform signal source device based on SOPC | |
| CN102749566B (en) | Variable-frequency series resonance test method based on FPGA (field programmable gate array) | |
| CN212410745U (en) | Excitation source of transformer substation grounding grid positioning device | |
| CN104236895A (en) | Mechanical characteristic detection circuit of high-voltage circuit breaker | |
| CN203465372U (en) | Once through-flow three-phase simultaneous measurement detector for transformer station device | |
| CN206563780U (en) | The anti-interference line parameter circuit value intelligent tester of frequency conversion | |
| CN105071667A (en) | Harmonic wave generator and method for detecting elements of power grid via the same | |
| CN115792478B (en) | Method and system for realizing composite frequency test by using broadband volt-ampere characteristic instrument | |
| CN206042005U (en) | Test system based on broadband vector signal | |
| CN206460083U (en) | A kind of numerical control variable frequency test power device tested for large ground network | |
| CN206211851U (en) | Three phase sine wave generator | |
| CN216216586U (en) | AC high-voltage module and high-voltage AC/DC power supply device | |
| Qi et al. | Turn-Off Characteristic Monitoring of Power Electronic Devices in Three-Phase Inverters Based on ZYNQ |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |