Power Loss Evaluation of 2.5 MHz High Frequency Inverter Based on Frequency Multiplying Method

Conference: PCIM Europe 2017 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/16/2017 - 05/18/2017 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2017

Pages: 7Language: englishTyp: PDF

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Authors:
Orikawa, Koji; Ogasawara, Satoshi; Itoh, Jun-ichi (Nagaoka University of Technology, Japan)

Abstract:
This paper describes a 2.5 MHz high frequency inverter based on a frequency multiplying method. A proposed circuit consists of a five-phase inverter and multi-core transformers. An operation frequency of the five-phase inverter and multi-core transformer is 500 kHz which is one-fifth of an output frequency of 2.5 MHz. Therefore, the proposed circuit can realize high efficiency by utilizing available semiconductor switches and magnetic materials. In this work, a principle of suppression of iron loss is experimentally clarified by measuring B-H curves of a single transformer without a load when sinusoidal voltage is applied. Next, power losses of semiconductor switch and multi-core transformer are formulated. Finally, a power loss distribution is clarified based on theoretical analysis and the measured efficiency of the prototype circuit.