Shun-Jih Wang

Publications (2)0 Total impact

• Conference Proceeding: Adaptive Iterative Learning Control of Switched Reluctance Motors for Minimizing Energy Conversion Loss and Torque Ripple

  Shun-Chung Wang, Yi-Hua Liu, Shun-Jih Wang, Yih-Chien Chen, Shou-Zhuang Lin
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  ABSTRACT: In this paper, an adaptive iterative learning control based on the accurate magnetization characteristics of the SRM is proposed to minimize the torque ripple and electromagnetic energy conversion losses by tuning the energization parameters of commutation angles and duty ratio. The electromagnetic energy conversion and torque in SRM are functions of the flux-linkage, current, and rotor angle. The optimal excitation current profile will result in optimal speed response, co- energy generation, and minimum torque ripple. An automatic characterizing system is developed to identify the SRMs' static magnetization curves accurately and take the nonlinearity of the magnetic circuit into account. The dSPACE DS1104 controller is utilized to setup the drive system for simulation and implementation. Experimental tests of a 4-phase 8/6 pole SRM at different operation conditions are given to demonstrate the effectiveness and performance of the proposed method.
  Power Electronics Specialists Conference, 2007. PESC 2007. IEEE; 07/2007
• Conference Proceeding: Computer-aided integrated platform for design and verification of electronic ballast

  Shun-Chung Wang, Yi-Hua Liu, Shun-Jih Wang, Yih-Chien Chen, Jun-Yan Chen
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  ABSTRACT: A computer-aided electronic ballast design platform for various gas discharge lamps is proposed in this paper to effectively assist engineers in designing and verifying electronic ballasts. This integrated platform features functionalities of lamp characteristics identification, circuit component optimum design, and ballast performance verification. Based on the precise lamp characteristics and design specification, through computer simulation and data computation, the design outcomes, including lamp butterfly chart, resonant tank designer, complete ballast schematic, bill of materials, are produced for a selected lamp type and input voltage range. A design case of ultraviolet lamp ballast with high power factor is taken as an example to expound the design procedures as well as demonstrate the validness and feasibility of the presented design platform.
  TENCON 2007 - 2007 IEEE Region 10 Conference;