| Summary: | 碩士 === 國立聯合大學 === 機械工程學系碩士班 === 106 === With the development of technology, system automation is the current trends to make manufacturing more efficiency. Servo motors are known to play a core role in system automation because servo motors can cooperate with many transmission components and sensors such as automatic production, robot and automatic detective machine. So the demand for AC servo motors with high responsiveness, high efficiency and high overload capacity is dramatically increasing. For small-scale servo motor with high torque density, the variation of the parameters of the motor design is very sensitive to the output characteristics due to the limited space requirements, and it also increases the difficulty of its design.
This paper aims to design a motor that its output characteristics can reach the product of well-known electrical corporation. Based on the specified load and volume limits, a permanent magnet servo motor is designed so that its rated torque and maximum torque of 350% overload, can achieve specifications at different speed. In this paper, spoke type rotor is used. Under the processing conditions, the magnetic barriers are adopted to prevent magnetic flux leakage phenomenon, and the uneven airgap is also utilized to make the air gap flux density distribution closer to the sine waveform. Simultaneously, through the rectangular permanent magnet trapezoidal to enhance the air gap magnetic flux density under the same amount of permanent magnet. Finally, analyze the structure stress of rotor due to centrifugal force, and thermal effect resulted from the copper loss and core loss, under the maximum power loss, to ensure that the motor operates safely.
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