Title :
High power density nanocrystalline core transformer design for resonant converter systems
Author :
Shen, W. ; Wang, F. ; Boroyevich, D. ; Tipton, C.W.
Author_Institution :
Bradley Dept. of Electr. & Comput. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
Abstract :
Design issues of high power density transformers for resonant converter systems are discussed. Under the specified operating condition, the transformer is designed to achieve the minimum volume. Finemet® nanocrystalline magnetic material is suitable for the pulse applications, due to its superior low loss density and high operating temperature characteristics. 1000 W/in3 power density is achieved for the 30 kW pulse operation converter. Based on an energy-based approach, lumped-component transformer equivalent circuit is developed, with leakage inductances and winding capacitances calculated according to certain transformer geometry. The analysis has been verified by the experimental results.
Keywords :
design engineering; equivalent circuits; lumped parameter networks; magnetic materials; nanostructured materials; power transformers; resonant power convertors; 30 kW; Finemet®; high power density nanocrystalline core transformer; leakage inductances; lumped-component transformer equivalent circuit; nanocrystalline magnetic material; resonant converter systems; winding capacitances; Capacitance; Equivalent circuits; Geometry; Magnetic cores; Magnetic materials; Magnetic resonance; Nanostructured materials; Pulse transformers; Temperature; Transformer cores;
Conference_Titel :
Industry Applications Conference, 2005. Fourtieth IAS Annual Meeting. Conference Record of the 2005
Print_ISBN :
0-7803-9208-6
DOI :
10.1109/IAS.2005.1518756
