|Table of Contents|

Experimental study on eddy current loss and water friction loss of high-speed shielded motor(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2019年06期
Page:
66-70
Research Field:
研究与技术
Publishing date:

Info

Title:
Experimental study on eddy current loss and water friction loss of high-speed shielded motor
Author(s):
CHENG Cheng;  WANG Haoming;  LI Xiaofang;  LIN Qingguo
(Shanghai Engineering Research Center of Space Engine, Shanghai Institute of Space Propulsion, Shanghai 201112, China)
Keywords:
high-speed motor;  shielded motor;  eddy current loss;  water friction loss;  motor efficiency
PACS:
V434.3
DOI:
-
Abstract:
In order to study the eddy current loss and water friction loss of high-speed shielded motor during operation, a shielded motor with nominal power of 7.5 kW and nominal rotation speed 15 000 r/min was designed.The wet and no-load test equipment of shielded motor was built to carry out the “dry-mode” and “wet-mode” no-load tests under different rotational speeds, and the difference between the test results and the calculated results by the empirical formula of shielded motor loss was analyzed.The results show that the eddy current loss of the stator shield sleeve and the water friction loss between rotor and cooling medium have great influence on the efficiency of high-speed shielded motor.Even for the high-speed motor with optimized electromagnetic design, the motor efficiency is still reduced by about 20%～30% after applying the shielding sleeve.The accuracy of existing motor loss calculation formulas depends on the empirical coefficient, and it needs to be modified at high speed condition.Finally, it is recommended to optimize the thickness of stator shield sleeve, the shield sleeve material, the rotor diameter, etc.to further improve the operating efficiency of the high-speed shielded motor.

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Last Update: 2019-12-20