Universal power module test circuit and system and test method
A power module and test system technology, applied in the field of power electronic conversion, can solve the problems of low automation, complex test methods, and low test efficiency, and achieve the effects of low weight, easy access, and adjustable output
Inactive Publication Date: 2018-12-07
NR ELECTRIC CO LTD +2
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Problems solved by technology
[0005] In order to solve the problems of complex wiring, low test efficiency, complex test method and low degree of automation in the existing power module test system, the present invention proposes a general-purpose power module test circuit, system and test method, which have the advantages of simple test wiring, The advantages of high test efficiency and high degree of automation
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[0049] The present invention will be further described below in conjunction with the drawings.
[0050] Such as figure 1 Shown is a schematic diagram of the overall system composition of the present invention. The present invention provides a universal power module test circuit. The circuit includes an adjustable AC power supply unit and a first AC switch, wherein:
[0051] The input ends of the adjustable AC power supply unit and the control unit are both connected to single-phase AC mains via a first AC switch;
[0052] The adjustable AC power supply unit is composed of a single-phase rectifier circuit, a DC support capacitor, a single-phase inverter circuit, a second AC switch, a discharge switch, a discharge resistor, a current limiting resistor, a current sensor, and a voltage sensor. The circuit, the DC support capacitor, the single-phase inverter circuit, and the second AC switch are connected in series in sequence. The discharge switch and the discharge resistor are connecte...
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The invention discloses a universal power module test circuit and system. The test circuit comprises an adjustable AC power supply unit and a first AC switch. The test system comprises a power moduleto be tested, an adjustable AC power supply unit, a control unit and a first AC switch; input ends of the adjustable AC power supply unit and the control unit are connected to a single-phase AC mainssupply via the first AC switch; an output end of the adjustable power supply unit is connected to an AC terminal of the power module to be tested; the adjustable AC power supply unit is composed of asingle-phase rectification circuit, a DC support capacitor, a single-phase inverter circuit, a second AC switch, a discharge switch, a current limiting resistor, a current sensor, and a voltage sensor. The portable test system adopts a transformerless design, has a small size and low weight, and is easy to carry; cables connection with the power module to be tested are less; the test system is simple and reliable; the output is adjustable, and the automation program is high. The invention also discloses a test method for the universal power module test system.
Description
Technical field [0001] The invention belongs to the technical field of power electronic converters, and specifically relates to a universal power module test circuit, system and test method. Background technique [0002] With the application and development of power electronic technology in power systems, power electronic equipment is developing towards high-voltage and large-capacity modularization, especially in photovoltaic inverters, wind power inverters, chain static reactive power generators and flexible DC transmission systems It is widely used in other fields, and generally consists of several power modules connected in series or parallel. [0003] Power modules need to be subjected to detailed and complete factory testing during in-plant testing to improve testing efficiency and accuracy. When a fault occurs in the field operation, it needs to be quickly and easily tested on-site to determine the point of failure, and also during maintenance It needs to be subjected to sp...
Claims
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IPC IPC(8): G01R31/28
CPCG01R31/282
Inventor 盛晓东方太勋谢晔源吴扣林魏星周启文
Owner NR ELECTRIC CO LTD