Normal Flux Distribution in a Three-Phase Transformer Core Under Sinusoidal and PWM Excitation

Transformer no-load loss and noise have been reduced considerably because of improved core material and improved core design. The variation of normal or interlaminar flux distribution (z direction) in a three-phase transformer core has been measured under pulse width modulation (PWM) excitation (no-...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2007-06, Vol.43 (6), p.2660-2662
Main Authors: Xiao Guang Yao, Moses, A.J., Anayi, F.
Format: Article
Language:English
Subjects:
Attractive interlaminar force
Core loss
Cross-disciplinary physics: materials science
rheology
Eddy current testing
Eddy currents
Exact sciences and technology
Flux
Frequency measurement
Interlaminar
Magnetic cores
Magnetism
Materials science
Modulation
Noise reduction
normal flux
Other topics in materials science
Phase transformers
Physics
planar eddy current
Pulse duration modulation
Pulse measurements
Pulse transformers
Pulse width modulation
PWM
Switching
Switching frequency
Transformer cores
Transformers
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Description
Summary:Transformer no-load loss and noise have been reduced considerably because of improved core material and improved core design. The variation of normal or interlaminar flux distribution (z direction) in a three-phase transformer core has been measured under pulse width modulation (PWM) excitation (no-load) with switching frequencies in the range of 1-3 kHz. The planar eddy current loss and attractive interlaminar force were analyzed for selected values of modulation index and magnetization condition (frequency 50 Hz; induction 1.5 T). Results showed significant reduction of the planar eddy current component and attractive interlaminar force for low modulation index with increasing switching frequency
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2007.893782