Iron Loss Analysis of Permanent Magnet Motors Fed by PWM Inverter |
| |
Authors: | ERI MARUYAMA AKESHI TAKAHASHI SHINICHI WAKUI Wataru Hatsune |
| |
Affiliation: | 1. Hitachi Research Laboratory, Ltd, Japan;2. Power Systems Company, Hitachi, Ltd, Japan;3. Hitachi Appliance, Ltd, Japan |
| |
Abstract: | Carrier harmonic losses that consist of iron loss, eddy current loss, and ac copper loss are produced in a permanent magnet machine driven by a PWM inverter. It is already known that a higher motor inductance can lead to lower carrier harmonic losses. This paper investigates the carrier harmonic loss composition of two motors with identical dimensions but different inductances. The results of finite element analysis (FEA) showed that the eddy current loss in the iron core accounts for most of the carrier harmonic loss. It is also shown that the carrier harmonic loss of the iron core is quantifiable using theoretical calculations. |
| |
Keywords: | PWM inverter PM motor eddy current loss carrier harmonics iron loss |
|
|