Using Taguchi Method to Design Small-Capacity Motor and Corresponding Economic Evaluation

• Main Authors: Yun-Han Huang, 黃筠涵
• Other Authors: Horng-Ching Hsiao
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/38068231133889683988

碩士 === 國立臺灣科技大學 === 電機工程系 === 105 === Recently, energy saving, carbon reduction and improve equipment efficiency are becoming the focus and most concern in many countries due to the energy crisis and greenhouse effect. The motors, occupied the most ratio of energy consumption and widely used in all kinds of industrial equipment and household appliances, have being the key point for securing higher energy efficiency. The thesis is devoted to improve the efficiency of the motor. The study is initiated to compare the operation performances between induction motor and brushless DC (BLDC) motor which were the most used in the electric fan application. The induction motor has the advantages of low cost, simple control, with the disadvantages of low efficiency and noise. While the permanent magnet BLDC motor has the advantages of small size, high efficiency, long life and noiseless. Therefore, the permanent magnet brushless DC motor is more suitable for used in the electric fan than the induction motor. In this thesis, the brushless DC motor were analyzed and simulated firstly. The evaluation of brushless DC motor magnet is classified into NdFeB magnet and ferrite magnet for analysis. The newer, better and optimal structure of the 4-pole-9-slot BLDC was proposed which is well required in electric fan. The mathematical model of motor was analyzed via JMAG_Designer and the analysis is based on Taguchi method. With choosing the control factors under the boundary conditions properly, the optimal combinations of efficiency and performances can be obtained. The optimal structures with the maximum efficiency of the 4 poles 9 slots BLDC motor using two kinds of materials were achieved using the analysis of variance method. With the aids of the finite element analysis software, the efficiency of brushless DC motor with ferrite material was increased from 64.5% of the prototype motor to 67.5% for new motor. While the efficiency of brushless DC motor with NdFeB material was increased from 67.5% of the prototype motor to 83.2% for new motor. Both efficiency of the two different magnet materials motor structure are higher than the induction motor which only value of 21.74% approximately. A new well design of brushless DC motor suitable for light, small capacity load, such as electric fan, can improve products efficiency and reduce energy consumptions.