In order to make a quantitative analysis of the power loss in wireless power transfer system, a comprehensive analysis of all the losses of a magnetic resonant wireless power transfer system is presented in this paper. The skin effect, proximity effect and high frequency radiation is also taken into account in coils whose internal AC resistance and high frequency radiation resistance are presented. And the equivalent circuits and resistance calculation formulas of the system are proposed. The resistance and the loss of each part was measured, and the model is validated by experimental result.

Loss analysis and improvement of all parts of magnetic resonant wireless power transfer system

Along with the government and market take more and more attention to the energy efficiency of power supply, the loss of IGBT module, as the core device, has become a hot topic. Firstly, the dynamic process of IGBT module is analyzed, an accurate and an estimation method of loss calculate are provided, then the working process and resonant process of phase shift full-bridge soft switching converter is discussed, and constitute of IGBT module loss in the circuit is analyzed. Finally the loss is calculated in the 350A inverter welder example, and a conclusion of reliability and proposal for design are given according to the calculation results.

Dissipation Analysis of IGBT Module in FB-ZVZCS-PWM Converter

By employing a passive auxiliary network consisting of capacitors and inductors,the full-bridge converter can achieve zero voltage switching(ZVS) for all primary switches in a wide load range.Meanwhile,accurate loss analysis facilitates the proposal of novel methods to reduce losses,optimization of converter topology and improvement of the efficiency.In this paper,the detailed loss analysis of full-bridge converters with auxiliary networks was performed,and a novel simplified loss analysis model was given.Based on the proposed model,the losses of full-bridge converter with ?-type auxiliary network and Y-type auxiliary network were studied and compared in deep.Finally,the validity of the analytical research was verified experimentally.The research taken on this paper is valuable for the further study of full-bridge converter.

Power Loss Comparison of Two Full-bridge Converters With Auxiliary Networks

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Power Loss Comparison of Two Full-bridge Converters With Auxiliary Networks