Boundary element estimation of current density distribution and eddy current loss in bundled multi-wire cables
✍ Scribed by A. Sakurai; T. Tsuchiya; Y. Kagawa
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 607 KB
- Volume
- 6
- Category
- Article
- ISSN
- 0894-3370
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✦ Synopsis
A numerical approach to the estimation of the current density distribution and the eddy current loss in bundled multi-wire cables using the boundary element method is proposed. Under the assumption of the gradual twist of the bundled wires, the cables are modelled to be two-dimensional with respect to their cross-sections. Three-phase transmission lines of cyclic symmetrical configuration are considered for which a reduction method is utilized to provide efficient computation. Some numerical demonstrations are made for three types of three-phase transmission-line models, consisting of a single wire and three and seven bundled wires. Two cases are considered: one in which the bundled wires are electrically contacted one to another on their surfaces and one in which they are independently insulated. The equivalent resistance is also calculated to examine the skin effect. The skin effect and the effectiveness of the multi-wire configuration to reduce the skin effect are well demonstrated.