期刊
IEEE TRANSACTIONS ON POWER ELECTRONICS
卷 37, 期 8, 页码 8762-8766出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2022.3151796
关键词
Insulation; Magnetic cores; Coils; Electric fields; Power transformer insulation; Couplings; Power system measurements; CLLC converter; efficiency; electrical insulation; heat dissipation; medium-frequency split planar transformer (MFSPT); power density
资金
- National Natural Science Foundation of China [52067010]
This study proposes a high-efficiency medium-frequency split planar transformer based on a low-cost ferrite core. By adopting a split planar structure, the transformer achieves high electrical insulation, efficiency, power density, and excellent heat dissipation performance. Finite-element analysis and experimental evaluation demonstrate that this transformer can simultaneously achieve high power, efficiency, power density, and electrical insulation.
A high-efficiency medium-frequency split planar transformer (MFSPT) based on low-cost ferrite core (PC40) is proposed for medium-voltage modular power conversion. By adopting a split planar structure, high electrical insulation is achieved with high efficiency, high power density, as well as excellent heat dissipation performance at the same time. A finite-element analysis simulation is carried out to investigate the distribution of the magnetic field and electric field in the MFSPT. The designed MFSPT prototype achieves a power density of 21.1 kW/L and electrical insulation of 42 kV. The performance of the proposed MFSPT is experimentally evaluated on an 80 kW, 43 kHz CLLC converter and the peak efficiency of the CLLC converter is 99.33%. This letter shows for the first time that high power, high power density, high efficiency, and high electrical insulation can be achieved simultaneously by using the split planar structure. This letter is accompanied by a supplementary file demonstrating the applied voltage insulation test.
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