Frequency converter load test system

Abstract

The invention discloses a frequency converter load test system which comprises a storage end, an estimation end, a control end, a frequency converter connection end, a test end, a feedback end and a control end. The control end comprises a control module. The estimation end comprises a test level estimation module. The storage end includes a storage module and an information transmission module. The frequency converter connection end includes a frequency converter connection module and a switch module. The test end includes a filter module, a waveform integration module and a plurality of testmodules. The feedback end includes a test feedback module. The control end includes a test result evaluation module. The test level estimation module and the test feedback module are all connected tothe control module. The system has reasonable design, specific test parameters can be set according to specification parameter information of a frequency converter to be tested, different numbers ofloads are connected to the frequency converter to be tested for load test according to test parameter information, the loads and the frequency converter to be tested can be timely separated after obtaining the test result, the test efficiency is improved, and the power consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of frequency converter testing, in particular to a frequency converter load testing system. Background technique [0002] Before the inverter leaves the factory, its performance must be tested in detail, including the temperature rise test of the inverter with rated load, which is used to test the temperature rise of the rectifier module and inverter module of the inverter and the drive circuit. At present, the load test of the inverter is realized by driving the motor. The motor shaft is rigidly connected to the shaft of another load motor, and the load motor is driven by another inverter. Therefore, the load test of the inverter needs to be configured with a power equivalent to the inverter to be tested. Two motors, one load frequency converter, braking unit and braking resistor occupy a large area and cost a lot. [0003] After retrieval, the patent document with the application number 201610132843.6 dis...

AI Technical Summary

Problems solved by technology

The specifications and parameters of different types of inverters are not the same, but most of the existing inverter load test systems cannot test it according to the industry standard parameters or national standard parameters of the inverter to be tested, so that when testing different types of inverters It is cumbersome to require staff to adjust the test parameters item by item, so we propose a frequency converter load test system to solve the above problems

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