An Equivalent Test Method for Motor Temperature Rise Excited by Short-term Load

Abstract

The invention provides a motor temperature-rise equivalent test method of short-time load excitation, and belongs to the technical field of motor testing. The invention discloses a method for accurately restoring temperature-rise data under a load continuous excitation state of a motor by using temperature-rise data under a load short-time excitation state of the motor. The advantages of the method of the invention are that the temperature-rise data under the load continuous excitation state of the motor is indirectly obtained by measurement data under the load short-time excitation state of the motor, the temperature rise of the motor is lower than a temperature-rise value when the load continues to be excited during the test, and thus the risk of high-temperature damage of the motor is reduced; the motor can be in a natural cooling state for a long time simply by short-time excitation thereof, and the energy consumption can be effectively reduced; and the calculation process is simple, the operation is easy, the use of a priori knowledge such as the motor model, loss model and system-related properties is not necessary, and the order and specific parameters of a heat transfer function is not required.

Description

technical field [0001] The invention belongs to the technical field of motor testing, and relates to a short-time load excitation equivalent test method for motor temperature rise, in particular to a method for restoring temperature rise data under the continuous excitation state of the motor load by using test data in the short-time excitation state of the motor load test method. Background technique [0002] The temperature rise of the motor affects the reliability and service life of the insulation in the motor, and is closely related to the safety and reliability of the motor and its application equipment. Therefore, it is of great significance to accurately obtain the temperature rise of specific load working conditions such as motor rating and overload to verify the rationality and reliability of the motor design. [0003] At present, the method of temperature rise test for a specific working state is to continuously load the motor and maintain it in the expected test...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of high difficulty and high energy consumption in the existing motor temperature rise test method, and provide an equivalent test method for motor temperature rise with short-term load excitation, specifically a short-time excitation method using motor load The test data under the state accurately restores the test method of the temperature rise data under the continuous excitation state of the motor load

Images