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Magnetic Field Constraints in the Passenger Compartment of Electric Vehicles

This paper presents a characterization of magnetic field constraints in electric vehicle compartment. Because of the small space inside a vehicle, passengers sit very close to the electric system. For this it was analyzed the vehicle power train components and their connection in order to see which are the magnetic field values generated by the high voltage cable which connects the motor to the battery system. To reduce the magnetic field inside the compartment, some car manufacturers choose to integrate the inverter into electric motor and the power management system into the battery system. For magnetic field simulation it was used a Finite Element Method Magnetics tool called FEMM which is a finite element package for solving 2D planar and axisymmetric problems in low frequency magnetics and electrostatics. This study presents magnetic field simulations for 3 different topologies of the high voltage cable. Another simulation was performed for coaxial cable.