| Summary: | 碩士 === 國立臺北科技大學 === 電機工程系電力電子產業碩士專班 === 107 === The main purpose of this thesis is to study the measurement method of permanent-magnet synchronous motor parameter, the construction of dynamic test platform and the development of test system for radial magnetic rotor position sensing IC. In recent years, simulation software has been used to accelerate the designing process of motor drives. Consequently, accuracy of the electrical parameters has a considerable influence on the correctness of the simulation result. Accuracy of measurement from the prototype motor feedback, likewise, plays a key role in the motor design. For is reason, a method to measure electrical parameters, torque constant, and no-load current back electromotive force constant is developed in this thesis. A method to measure the influence of cogging torque and magnetic saturation on phase inductance to assist in designing a permanent magnet synchronous motor and its drive is also established.
To measure the motor parameters and the output characteristics of the motor drive, a motor test platform is built with 2kW/6000rpm active load, 10Nm precision torque sensor, and adjustable Z-axis to provide low output power motor test. Since the alignment of the rotor axis of the motor to be tested, which is low-power and high-speed, and the loaded motor is critical for torque measurement accuracy, the standard operating procedure using a center align aid is included to improve the accuracy of the measured data.
Then, a high speed test system for radial magnetic rotor position sensing IC is built. A high-resolution optical encoder is added to the rotating shaft to fix the ring-shaped magnet for analyzing the measurement accuracy, the placement position influence, and the dynamic response characteristic of the IC to be tested. These mechanisms are used to reduce the inertia wheel of the servo motor torque chopping and as the precise platform to adjust XYZ positions of the sensing IC independently. Finally, the effectiveness of the proposed method is verified by actual measurements.
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