Effect of PWM voltage excitation on iron loss of inverter fed motors

被引:0
|
作者
Moses, AJ [1 ]
Anayi, F [1 ]
机构
[1] Univ Wales Coll Cardiff, Sch Engn, Wolfson Ctr Magnet Technol, Cardiff CF1 1XL, S Glam, Wales
关键词
drive systems; PWM; magnetic devices;
D O I
暂无
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
A growing number of induction motors are used in energy efficient, variable speed drive systems fed from PWM inverter sources. Losses in electrical steel used in stator cores increase by as much as 100% compared to sinusoidal excitation when magnetised under PWM conditions. Laboratory data taken under PWM conditions are used to show how the efficiency of typical motors can fall drastically at certain points of a duty cycle due to variation of the PWM modulation index. The core loss is 20% to 80% higher than under sinusoidal voltage excitation over a typical speed range, which can have a major impact on the claimed efficiency of drive systems.
引用
收藏
页码:351 / 354
页数:4
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