PolyU IR Collection: IC Conference Papers & Presentations http://hdl.handle.net/10397/931 The Collection's search engine Search the Channel search http://repository.lib.polyu.edu.hk/jspui/simple-search Calculations of transient eddy current field and dynamic short circuit forces in a large power transformer http://hdl.handle.net/10397/1104 Title: Calculations of transient eddy current field and dynamic short circuit forces in a large power transformer<br/><br/>Authors: Ho, Siu-lau; Li, Y.; Yang, Shiyou; Wong, Ho-ching Chris; Wong, K. F.<br/><br/>Abstract: In this paper, the T-Ω finite element method (FEM) is proposed to study the three dimensional (3D) transient eddy current field and electromagnetic forces acting upon the coils in power transformers. The radial press stress on the coil sections are included in the computation. The axial vibration, displacement and dynamic force of the coil sections are analyzed by modeling the coil as a mass-spring. Sun, 01 Jan 2006 00:00:00 GMT Niched genetic simulated annealing algorithm in the optimization design of a permanent magnetic actuator for a 40.5kV vacuum circuit breaker http://hdl.handle.net/10397/1100 Title: Niched genetic simulated annealing algorithm in the optimization design of a permanent magnetic actuator for a 40.5kV vacuum circuit breaker<br/><br/>Authors: Ho, Siu-lau; Li, Y.; Cui, H.; Lo, Edward; Yang, Shiyou; Wong, Ho-ching Chris; Wong, K. F.<br/><br/>Abstract: A new algorithm combining genetic algorithm (GA) and simulated annealing (SA) algorithm with significant improvements on efficiency is proposed. Based on the calculation of the electromagnetic field, the optimization design of a bi-stable permanent magnetic (PM) actuator for a 40.5kV vacuum circuit breaker (VCB) is developed. Sun, 01 Jan 2006 00:00:00 GMT