CST – Computer Simulation Technology

Shielding effectiveness for a three-phase transformer at various harmonic frequencies

Title:
Shielding effectiveness for a three-phase transformer at various harmonic frequencies
Author(s):
A. Di Pasquale G. Antonini A. Orlandi
Source:
IET Science, Measurement & Technology
Vol./Issue/Date:
Volume: 3, Issue: 2, March 2009
Year:
2009
Page(s):
175-183
Abstract:
A two-step optimisation procedure for the design of a passive shield aimed at decreasing the lowfrequency magnetic field using a transformer is presented. After having introduced the relevant characteristics of the medium size three-phase transformer, the procedure is described in detail. It is based on the decomposition in the harmonic component of the radiated field, which is associated with the direct, inverse and homopolar sequences of the current of the transformer. The effect of the optimised shield is verified by measurements.
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