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Analysis of Induction Motor Drive Losses in the Field-Weakening Region
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| Author(s) |
Tine Marcic, Gorazd Stumberger, Miralem Hadziselimovic, Ivan Zagradisnik |
| Abstract |
Operation of adjustable-frequency drives is
accompanied by generation of losses in the converter and
motor. These losses depend on the modulation frequency
and on the drive output power. The change of modulation
frequency modifies converter losses and also motor losses,
because of the modified motor current waveform. Thus, it
modifies total drive losses. Variation of the drive output
power also modifies total drive losses and can be
problematic when the drive operates in the field-weakening
region. The paper presents a complete analysis of motor
losses, converter losses and losses of the entire drive in the
field-weakening region of an open loop controlled induction
motor drive supplied by a voltage source inverter. Losses
are presented in dependence of the voltage source inverter
output frequency and the drive’s output power. Presented
results show that the modified voltage to frequency ratio
causes an increase of the total drive losses in the region of
high frequencies and high output powers. The paper also
presents an analysis of the impact of modulation frequency
on drive losses. |
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| Filename: | T5-202.pdf |
| Filesize: | 292.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2007-03-12 by System |
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