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A frequency converter maintenance test system

A test system and frequency converter technology, applied in instruments, measuring electrical variables, measuring devices, etc., can solve the problems of inability to test large current loads, various voltage levels of frequency converters, difficulty in obtaining control power, etc., and achieve convenient circuit wiring and debugging. The circuit is stable and the energy consumption is small

Active Publication Date: 2019-06-11
BEIJING SOLY TECH
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  • Abstract
  • Description
  • Claims
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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

Method used

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  • A frequency converter maintenance test system
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  • A frequency converter maintenance test system

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Experimental program
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Effect test

Embodiment 1

[0033] like figure 1 Shown is the test structure diagram of Embodiment 1 of the inverter maintenance test system of the present invention. The embodiment includes the inverter test control cabinet G1, the inverter test control cabinet G2, the tested inverter U, and the tested high-power inverter without rectification unit inverter system I, dry-type transformer TC1, and dry-type transformer TC2. This embodiment is suitable for low-voltage inverters and high-power inverters without rectification units. U can be a frequency converter of high power level, or a frequency converter of small and medium power level, which can be adjusted through the frequency converter test control cabinet G1.

[0034] When the tested inverter drives a large load test, the inverter test control cabinet G1 works, and the dry-type transformers TC1 and TC2 are connected to the circuit through the contactor GYJ controlled by the inverter test control cabinet G1. At this time, adjust the tested inverter f...

Embodiment 2

[0037] like figure 2 As shown, it is the test structure diagram of Embodiment 2 of the inverter maintenance test system of the present invention. The structure has been changed on the basis of Embodiment 1. This embodiment is suitable for inverters of medium and high voltage inverters and high voltage DC bus inverters without rectification units. Drive heavy load or no-load test after system maintenance.

[0038] By controlling the middle tap of the dry-type transformer TC1, using the principle of self-coupling, it can output 690V AC voltage. After the inverter test control cabinet G1 can test the 690V input voltage of the inverter under test, by adjusting the high-voltage side circuit of the dry-type transformer TC2 State, realize no-load and high-current load test. Through the frequency conversion test cabinet G2, the DC output of 550-1000V can be realized, providing power for the inverter system of the high-voltage DC bus inverter without rectification unit, and through t...

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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 tests, and in particular relates to a frequency converter maintenance test system, which is applicable to the power input of various levels of frequency converters and the low-frequency, high-current load test system of frequency converters limited by test conditions. Background technique [0002] A large number of motors are used in the metallurgical and mining industry, especially medium and high voltage motors, and the main power source of the motor is the frequency converter, which saves a lot of energy for the mining industry. The voltage specifications of frequency converters in factories and mines are various and complicated, including 380V input, 690V input, DC 550V input and other frequency converters, especially medium and high voltage frequency converters. The price of the frequency converter is expensive, and the new equipment is rarely replaced after the freque...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 张立成高大伟娄猛朝马亚楠李文迟春革
Owner BEIJING SOLY TECH
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