연료전지 자동차용 고전압 쿨링팬 BLDC 모터 소음 최적화 설계

Fuel cell vehicle performance depends largely on the performance of the fuel cell stack. The fuel cell stack that supplies electric power to the fuel cell vehicle can be optimized to operate at a relatively low temperature compared to the internal combustion engine. In order to operate the fuel cell stack under optimal temperature control conditions, a cooling fan system equipped with a high voltage BLDC motor capable of generating a high output power are required because a large amount of cooling air flow is required in conventional low voltage motor systems. By applying a high-output fan system equipped with a high-voltage motor, the driving performance of the fuel cell vehicle can be improved by utilizing the operation performance of the fuel cell stack. This paper is focused on noise optimization design of cooling fan BLDC motor for fuel cell vehicle. Causes of electromagnetic noise and vibration include cogging torque, torque ripple and unbalanced electro-magnetic force. Through reaction surface method optimization design, improvement design is archived goal of cogging torque, torque ripple and EMF(THD). Cogging noise is also improved by optimization design.