Test system and method thereof for frequency converter

A test system and frequency converter technology, applied in the field of frequency converters, can solve the problems of cumbersome and lengthy work in the test process of low-voltage frequency converters, the lack of a relatively perfect integrated integrated test system, and the heavy workload of testers, so as to avoid repeated tests, Improve the test error tolerance rate and reduce the effect of manual repetition

Pending Publication Date: 2018-06-12
青岛海洋电气设备检测有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the application field of low-voltage inverters, the type tests and routine tests of low-voltage inverters are mostly carried out individually and item by item. Correspondingly connect the lines, the work of the whole low-voltage inverter test process is cumbersome and lengthy, there is no relatively complete integrated test system, the workload of the tester is large, time-consuming and labor-intensive

Method used

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  • Test system and method thereof for frequency converter
  • Test system and method thereof for frequency converter
  • Test system and method thereof for frequency converter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1, a test system for a frequency converter, including a single-phase transformer, a motor switch, a circuit breaker, a test motor, a feedback motor, an excitation device, a test drive, a grid simulator, a magnetic heavy-duty encoder, NJ Type torque sensor, control system, measurement system, protection system, described single-phase transformer converts single-phase 220V alternating current into the alternating current transformation device of single-phase 110V alternating current;

[0030] The motor switch controls the power on and off of the motor and the protection of the test motor and the feedback motor. This test system uses 2n motor switches, which are respectively the motor switch 11, the motor switch 12 until the motor switch n1 and the motor switch n2, where n is Natural numbers within 1-80;

[0031] The circuit breaker controls the on and off of the power supply line and the feedback line. This test system uses 4 circuit breakers, which are respect...

Embodiment 2

[0042] Embodiment 2, on the basis of Embodiment 1, the adjustable three-phase 0-1140V bus in the test system supplies power for three-phase tested inverters of different voltage levels; the single-phase 220V power bus is 220V single-phase tested inverters Direct power supply, the single-phase 220V power bus is stepped down by a single-phase transformer to supply power to the 110V single-phase inverter under test; each power supply line and the load line of the test motor and feedback motor are controlled by the circuit breaker. After the voltage level power supply, the test motor is driven by the frequency converter under test, and the test motor drives the rotor shaft of the feedback generator to rotate, so that the electric energy generated on the stator side of the feedback motor is converted into DC by the feedback frequency converter, and then fed back into the DC feedback common bus ; The measurement system includes a high-precision power analyzer, a waveform recorder, a ...

Embodiment 3

[0043] Embodiment 3, a test method for a frequency converter, using the test system of Embodiment 1, the specific test method is as follows;

[0044] S1, the user logs in to the system platform by selecting an account number and entering a password;

[0045] S2, setting the parameters of the voltage, current and capacity of the system through the control system, that is, the test system;

[0046] S3, select test type and project;

[0047] S4, select the test control mode, whether it is manual or automatic;

[0048] S5, the tester participates and is responsible for manual operation steps, such as wiring and installing the frequency converter under test;

[0049] S6, the product starts to be tested according to the test steps of the S4 step;

[0050] S7, select the output form of the test report, save it as a separate file or print it;

[0051] S8, whether to continue the same product test, no, exit the test, yes, enter the step S9;

[0052] S9, whether to continue the same ...

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Abstract

The invention discloses a test system and method thereof for a frequency converter. The test system comprises a single-phase transformer, a motor switch, a circuit breaker, a test motor, a feedback motor, an excitation device, a test frequency converter, a power grid simulator, a magnetic heavy lad encoder, a NJ type torque sensor, a control system, a measuring system and a protection system, eachof power supply lines of the test system and load lines of the test motor and the feedback motor are all controlled by the circuit breaker to be switched on and off, after a specified voltage level power supply is selected, the test frequency converter drives the test motor, the test motor drives a rotor shaft of a feedback generator to rotate, so that the electric energy generated by the statorside of the feedback motor is converted into direct current power through a feedback frequency converter, and then the current is fed back to a direct current feedback common bus; the system has the advantages of integration, impact and errors caused by environments and labors when a test is carried out item by item are reduced, and reliability of the test is increased.

Description

technical field [0001] The invention relates to the technical field of frequency converters, in particular to a testing system and method for frequency converters. Background technique [0002] In the application field of low-voltage inverters, the type tests and routine tests of low-voltage inverters are mostly carried out individually and item by item. Correspondingly connecting the lines, the work of the whole low-voltage inverter test process is cumbersome and lengthy. There is no relatively complete integrated test system, and the workload of the tester is large, time-consuming and labor-intensive. [0003] In view of this deficiency in the test link, it is imminent to realize the integration of the test links of the frequency converter. The low-voltage inverter test system is used to meet the voltage level of 1140V and below (that is, three-phase 1140V, three-phase 690V, three-phase 660V, three-phase 500V, three-phase 380V, three-phase 220V, single-phase 220V, single-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 许钒王灏姚非张长春王广大梁国斌赵尚
Owner 青岛海洋电气设备检测有限公司
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