Magnetic Flux Density Measurement Platform for an Inductive Wireless Power Transmitter Coil Design

Abstract

This paper presents a platform developed for automated magnetic flux density measurement. The platform was designed to be used to measure the magnetic flux density of the transmitter/receiver coil of an inductive wireless power transfer system. The magnetic flux density of a transmitter was measured using a small, 3-axis search coil. The search coil was positioned in the 3D space above the transmitter coil using a 3D positioning mechanism and used to measure the magnetic flux density at a specific point. The data was then sent to a computer application to visualize the magnetic flux density. The measured magnetic field could be used in combination with electromagnetic field solvers to design and optimize transmitter coils for inductive wireless power transfer systems.

Design and Performance Analysis of New Coupling Magnetic Core Structure for Dynamic Wireless Charging System of Electric Vehicle

“…The transmitting end is laid on the road to realize the high-frequency conversion of electric energy and transmission, and the pickup end is placed on the bottom of the vehicle to complete the signal pickup and energy output. [6][7][8][9][10][11][12][13][14][15] However, the transmitting coil and the pickup coil are physically separated, presenting a loosely coupled structure, [16] which leads to a certain degree of magnetic leakage, reduces the efficiency of energy transmission and leads to larger electromagnetic radiation. [17][18][19][20] Therefore, most of the existing research has been conducted to reduce the distribution of magnetic lines of force in the spatial medium by improving the structural layout of the core, so that as many magnetic lines of force as possible flow with the core to form a closed loop, which is used to attenuate the intensity of electromagnetic radiation in the air [21][22][23][24][25] and to increase the energy transfer power and efficiency.…”