Development of new directdrive motor and its application in beverage conveyor line

JIN Jiefeng, WANG Liqiang, LOU Xiangming, YE Peng

(Hangzhou Wahaha Group Co., Ltd., Hangzhou 310020, China)

Abstract: Aiming at the low efficiency of the asynchronous motor and retarder which used in the beverage conveyor line, and in order to improve the efficiency of the drive unit, the idea of replacing the asynchronous motor and retarder with the lowspeedhightorque and high efficiency directdrive motor to drive the conveyor directly was presented. The torque and power requirements of the drive unit were analyzed under different operation conditions of the bottle conveyor belt, and then the basic parameters of the directdrive motor were determined. In order to achieve the requirements of lowspeedhightorque and high efficiency, the directdrive motor was designed based on the rare earth permanent magnet synchronous motor technology, and a prototype of the directdrive motor was produced. The energysaving effect of the directdrive motor was verified by the practical test of the prototype of the beverage conveyor line. The results show that, the rated efficiency of the directdrive motor is up to 83%, and comparing with the asynchronous motor and retarder, the directdrive motor can save 30%~40% energy.

Key words: directdrive motor; energy efficient; bottle conveyor belt; permanent magnet synchronous motor