Method for testing performance curve of three-phase asynchronous motor

Abstract

The invention discloses a method for testing a performance curve of a three-phase asynchronous motor. The method comprises the following steps: S1, analyzing motor characteristics; s2, carrying out a no-load test; s3, determining excitation parameters, iron loss and mechanical loss; s4, determining a short-circuit test and short-circuit parameters; s5, recording data; and S6, drawing a motor characteristic curve. The method has the advantages that the characteristics of the motor can be analyzed, no-load experiments are carried out, excitation parameters, iron loss and mechanical loss are determined, short-circuit experiments and short-circuit parameters are determined, and finally data is collected to draw the characteristic curve of the asynchronous motor, so that main parameters of the motor can be analyzed and distinguished through a reasonable mathematical model, and direct or indirect damage of the motor can be easily detected; the operation process is simple and convenient; and excitation parameters of the asynchronous motor can be measured through the no-load test, and the excitation parameters of the asynchronous motor determine the saturation degree of a main magnetic circuit of the motor.

Description

technical field [0001] The invention relates to the field of motor performance testing, in particular to a method for testing the performance curve of a three-phase asynchronous motor. Background technique [0002] In accordance with the provisions of the standard GB755-87 Rotating Electrical Machines--Basic Technical Requirements 15.1 Inspection Test and Type Test", each newly assembled motor must be inspected and tested to determine whether it meets the requirements of its manufacturing standards in terms of electricity and machinery. In The inspection and test items of the asynchronous motor should at least include: the measurement of the DC resistance of the winding, the no-load test, the stall test and the short-term voltage increase test, etc. The mechanical work, rated power, maximum torque, and power of the motor need to be obtained. For important data such as factors and overload multiples, the motor under test must run with load. At present, there are many self-dev...

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Problems solved by technology

For important data such as the mechanical power, rated power, maximum torque, power factor and overload multiple of the motor that need to be obtained, the motor under test must run with load. At present, there are many self-developed three-phase asynchronous motor performance curve test methods. However, these methods not only do not have the ability to comprehensively measure various electrical parameters, but also cannot analyze and judge the main electromagnetic parameters of the motor through a reasonable mathematical model, and "diagnose" the direct or indirect damage of the motor, and the operation process is relatively complicated.

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