Evaluation of increasing rates in eddy-current loss of the motor due to carrier frequency

This paper describes that a theoretical formula for evaluating loss ratio in eddy current of a permanent magnet (PM) motor fed by a PWM inverter is proposed. A formula for evaluating the increasing rates of eddy-current loss in iron core due to carrier frequency corresponding to inverter output para...

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Bibliographic Details
Published in2014 International Conference on Electrical Machines (ICEM) pp. 1153 - 1157
Main Authors Maruyama, Eri, Sumita, Satoshi, Nakahara, Akihito
Format Conference Proceeding
LanguageEnglish
Japanese
Published IEEE 01.09.2014
Subjects
carrier frequency
Current measurement
eddy current loss
Frequency modulation
Inverters
Iron
Loss measurement
modulation method
Pulse width modulation
PWM inverter
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Summary:This paper describes that a theoretical formula for evaluating loss ratio in eddy current of a permanent magnet (PM) motor fed by a PWM inverter is proposed. A formula for evaluating the increasing rates of eddy-current loss in iron core due to carrier frequency corresponding to inverter output parameters (i.e., DC-bus-voltage, modulation index and modulation methods) are derived. Calculated and measured increasing rates of eddy-current loss in iron core were compared. According to the results of this comparison, the difference between the calculated and measured results is within 10 % when the modulation index is less than 0.7. The increasing tendencies of the calculated and measured increasing rates of eddy current loss agree well. The proposed theoretical formula can be applied for improving the efficiency of motor-inverter drive systems.
DOI:10.1109/ICELMACH.2014.6960327