Electromagnetic Field Analysis and Design of a Single-Phase Full-Bridge Power Converter for Electric Vehicle Range Extender

This paper takes the single-phase full-bridge power converter of the power generation system of the free-piston engine of the incremental electric vehicle (EV) as the research object. By establishing the three-dimensional (3D) electromagnetic radiation simulation model of the power converter, the electromagnetic radiation field of the power converter is simulated and analyzed by using the equivalent excitation source method. The shielding and suppression effect of the power converter shell on the far-field radiated electromagnetic field and its influence on the internal electromagnetic field are analyzed. The shielding cover of the radiation source and sensitive source of the power converter is designed, and the effectiveness of the electromagnetic radiation shielding device for shielding the radiation source and sensitive source is discussed. The simulation results show that the shell of the power converter can effectively shield the far-field radiation so that the external radiation field intensity is reduced below the standard value. The designed shielding device of the radiation source and the sensitive source can effectively reduce the radiation intensity at the position of the sensitive chip in the near-field area and satisfy the working conditions of the device.