Quantitative detection device and method for iron loss of motor based on leading out of heat

Abstract

The invention relates to a quantitative detection device and method for iron loss of a motor based on leading out of heat. The detection device comprises a heat-insulation container, a heat conducting medium, an excitation unit, a motor body to be measured and temperature measuring components, wherein the heat conducting medium is distributed in the heat-insulation container uniformly, and the excitation unit and the temperature measuring components are arranged in the heat-insulation container. The detection method comprises that the motor body to be measured is placed in the heat-insulation container, the motor body generates iron loss and heat via the excitation unit, emitted heat is led out by the heat conducting medium, and the temperature measuring components measure temperature change of the heat conducting medium and obtains iron loss of the motor by calculation. Compared with the prior art, the device and method have the advantages including simple operation and real and reliable measuring results.

Description

technical field [0001] The invention relates to a motor iron loss quantitative detection device and method, in particular to a motor iron loss quantitative detection device and method based on heat derivation. Background technique [0002] The loss of the motor is divided into copper loss, iron loss and mechanical loss. These three losses are the main factors affecting the working efficiency of the motor. Since iron loss and mechanical loss introduce more empirical parameters in the design process, how to accurately and quantitatively separate copper loss, iron loss and mechanical loss has always been a technical problem that plagues the motor industry. Compared with normal-speed motors, high-speed motors have relatively large iron losses and mechanical losses due to extremely high speeds. Therefore, accurate separation of motor iron loss will provide scientific guidance for the design improvement of high-speed motors. [0003] The calculation of iron loss in the motor eff...

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Problems solved by technology

However, this method has the disadvantages of cumbersome sample preparation and loading, the need for stress-relief annealing, and the waste of a large amount of sample material. Moreover, the test instrument is bulky, which is not suitable for the on-site detection of motor iron loss.

[0004] The Epstein square circle test is a test for standard samples of raw materials, which cannot correctly reflect the changes in iron loss parameters in the actual state after the silicon steel sheet has been processed by stamping, riveting, fine grinding, etc. and assembled into the motor body

At the same time, there are some parts made of other magnetic materials in the whole motor, and these parts will also produce iron loss under the action of alternating magnetic field.

Therefore, there is a large difference between the calculation of iron loss and the actual iron loss of the whole machine using only the test results of the Epstein square circle, and the iron loss measurement of the whole machine needs to be further explored

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