冷却ファン形状の電力評価による最適化

抄録

Reducing the power consumption of motors has been a recent research topic for motor manufacturers. The power tool industry is no exception; research in this field is aimed at smaller size, higher output, and higher efficiency. Although it depends on the type of motor, much of the loss that occurs in a motor is copper loss. To reduce copper loss, it is important to cool the motor efficiently. The goal of the present study was to optimize the shape of a motor-cooling fan. Improvement in energy efficiency was used as the basic function, and the pressure loss coefficient, which varies from product to product, was used as a noise factor. A fan shape with high energy efficiency was obtained. The final fan shape was used in an actual product to confirm its effect on quality characteristics. The results were a 4-db noise improvement, a 9-degree temperature improvement, and a 1% efficiency improvement.