The Method of Efficiency Characteristic Test of Three-phase Asynchronous Motor

Abstract

The invention discloses a three-phase asynchronous motor efficiency characteristic test system and test method. The test system is characterized in that a power tester is arranged at an input end of a motor and used for testing the input power of the motor; a torque rotating speed tester is arranged on the output shaft of the motor and used for testing the output torque and the angular velocity of the motor; a magnetic powder clutch is arranged at tail end of the output shaft of the motor and used for loading of the motor. Test of a load rate and an efficiency characteristic of a motor can be carried out rapidly and accurately.

Description

technical field [0001] The invention relates to a test system and a test method, in particular to a motor characteristic test system and a test method. Background technique [0002] The motor system has a large number and a wide range of applications, and is a power-consuming machine that consumes a lot of electricity. According to statistics, the total power consumption of motors in my country accounts for about 60% of the total electricity consumption in society, and the total power consumption of motors in the industrial field accounts for about 75% of industrial electricity consumption. The energy efficiency level of motors in my country is low. Part of the reason is that the efficiency of the motor itself is low. The other part is that the matching of the motor system is unreasonable. In some occasions where the load changes greatly, the motor will often run away from the high-efficiency point, resulting in low efficiency. A lot of energy is wasted; therefore, it is of ...

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Problems solved by technology

This efficiency test method requires many test parameters, the test and calculation methods are complicated, and it is difficult to build a test system

[0007] Fan Ying and others analyzed the motor energy efficiency test method (Fan Ying, Yan Huaguang, Yu Haibo, Zong Jianhua, Research on the motor energy efficiency test method and intelligent test system [J]. Electrical Technology, 2008, 09: 26-29.), proposed a high-efficiency Motor test system, which includes power supply unit, motor load and power feedback unit, control unit, test system unit, lifting platform, etc. The test system has a complex structure, many test points, and a large test workload

Curve fitting directly from the test data cannot accurately reflect the dynamic characteristics of the motor

[0008] There are computer methods for obtaining the efficiency characteristics of motors through simulating and simulating with the finite element method, and using experimental methods to collect multiple sets of data and directly perform curve fitting, but these two methods have a large workload and poor accuracy

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