Abstract
This paper is about an electric water pump used in an electric vehicle cooling system. An electric water pump is operated by a BLDC motor compared to a mechanical one, so it operates only as much as necessary, improving fuel efficiency. The use of an electric water pump reduces exhaust gas and has the advantage of being free to install, so it can be applied to automobiles, ships, and aircraft. In order to optimize the production of a BLDC motor used as an electric water pump, FEM and electromagnetic field analysis were performed. The dimensions and materials of the stator and rotor were selected by applying the values obtained through the analysis. In addition, the output characteristics of the motor were analyzed through parameter analysis and shape change through self-equivalent circuit analysis to reduce the outer diameter and increase the torque. The electromagnetic hazard of the PCB board was verified, and power integrity analysis was performed to reduce resonance and noise.