Frequency converter maintenance test system

Abstract

The present invention provides a frequency converter maintenance test system, and belongs to the frequency converter maintenance test technology field. The system comprises dry type transformers TC1 and TC2, and frequency converter test control cabinets G1 and G2. The tap of the dry type transformer TC1 is regulated to perform conversion output of input power to the frequency converter test control cabinets G1 and G2, the dry type transformers TC1 employs a self-coupling mode to output voltage, the frequency converter test control cabinets G1 and G2 provide various types of power supplies of the frequency converter test and provide protective measures in the frequency converter maintenance test process, and the dry type transformer TC2 supplies heavy current load for the frequency converter and supplies low-frequency heavy current load basis. The frequency converter maintenance test system solves the problems that multi-input power supply, direct-current source and control power in the low, medium and high voltage frequency converter debugging are difficult to obtain and cannot perform heavy current load test; only one set of the system can satisfy the frequency converter test requirement of each voltage grade, and the frequency converter maintenance test system is suitable for low-frequency debugging test of a high-power frequency converter having heavy current load with limited test condition, and small in energy consumption and saved in energy.

Description

Technical field [0001] The invention belongs to the technical field of frequency converter maintenance test, and specifically relates to a frequency converter maintenance test system, which is suitable for various grades of frequency converter power input and frequency converter low frequency high current load test system limited by test conditions. Background technique [0002] A large number of electric motors are used in the metallurgical and mining industry, especially medium and high-voltage motors. The main power source of the motors is the frequency converter, which saves a lot of energy for the mining industry. The inverter voltage specifications of factories and mines are diverse and diverse, including 380V input, 690V input, DC 550V input and other inverters, especially medium and high voltage inverters. Inverters are expensive. New equipment is rarely replaced after the inverter fails. The original equipment needs to be repaired. However, the repaired inverter needs to...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a frequency converter maintenance test system, which overcomes the deficiencies in the background technology, solves the problem that the voltage levels of frequency converters in metallurgical plants and mines are various and cannot be tested; solves the problem of frequency converters driving various load motor tests, In particular, it solves the problem of high-power inverters driving large loads, greatly reduces the cost of maintenance and testing of low-, medium-, and high-voltage inverters, and greatly improves equipment efficiency, reducing the occurrence of secondary failures in the use of inverters

The system solves the difficulties in obtaining multi-input power supply, DC power supply, and control power supply in the debugging process of low, medium and high voltage frequency converters, as well as the inability to carry out high-current load tests. High-level inverter test requirements, especially suitable for low-frequency debugging tests of high-power inverters with high-current loads with limited test conditions, and low energy consumption, saving energy

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