| Summary: | 碩士 === 國立臺灣大學 === 機械工程學研究所 === 107 === There are many applications of motor in our life, from heavy industry to hand tools, according to different environments. Based on two kinds of characteristics, one of that is synchronous motor, has constant speed, small starting torque, stable speed and high efficiency when reaching synchronous speed; the other is induction motor, has simple and durable construction, low manufacturing cost. This study combines the characteristics of induction motor and synchronous reluctance motor to achieve a high efficient motor. The motor has squirrel-cage rotor conductors which likes an induction motor, can start up by the induction torque without relying on the motor driver. After it is synchronized it rotated by the reluctance torque due to flux barriers which makes the difference of inductance between d-axis and q-axis. Since it is rotated synchronous speed the induced current of rotor conductor bar is very small ,therefore the rotor copper loss is significantly reduced compare with the induction motor.
First of all, this thesis starts with a common design method used in industrial, due to complete the squirrel-cage rotor shape and high winding factor, then adds the rotor geometry like barriers, by using ideal MMF distribution, can be suitably achieved by related objective functions like efficiency. In This thesis, a 750W prototype motor will be proof, and through the dynamometer to measure the performance likes efficiency and current in the rated state, and verify the simulation results, this motor successfully reached high efficiency output.
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