A study of the manufacturing characteristics of new materials for an electric vehicle drive motor

Abstract

The global electric vehicle market is experiencing rapid development, with three core technologies driving this growth: batteries, driving motors, and platforms. Specifically, recent research has focused on the material trends and manufacturing characteristics of driving motors. A driving motor is responsible for converting electrical energy into kinetic energy and transmitting power, and its performance is categorized as either high-output or low-output based on the vehicle's requirements. Key factors that impact the output of driving motors include the size of the motor core, the magnet shape, and the material thickness, with the material being the most important factor related to performance improvements. As a result, specialized technologies for manufacturing driving motors are gaining traction, including the use of thin steel plate materials. This shift in manufacturing methods has been implemented to enhance the performance of the motor. To serve as the driving motor steel plate material, a thin steel plate material with a thickness of 0.2 ~ 0.25T was utilized, and the method of laminating by embossing, which enhances the lamination force, was replaced with adhesive lamination utilizing a bond. Two adhesive lamination methods were employed: the dot bond and the self-bond types. The dot-bond type involves creating bonds at several points on the motor core, while the self-bond type employs bond-coated steel plate materials for lamination. Prior to incorporating the new self-bond steel plate material into the mass production line, a study of the manufacturing facility conditions and manufacturing characteristics was conducted.