| Summary: | 碩士 === 國立交通大學 === 電機與控制工程系所 === 93 === Owing to the high power density and high efficiency, BLDC motors have been used in various applications, such as the computer peripheral machines, household appliances, industrial machines and public transit systems. In general, the information of the motor’s position is required in controlling the BLDC motor. However, some drawbacks exist. For instance, the motor size and cost will be raised and the position censor will be influenced by the motor temperature inside. Therefore, recent investigators have paid more and more attention to sensorless MLDC motors, which can be operated without any position sensors.
A 3-phase BLDC axial-flux wheel motor is used in this thesis. It is a low speed and high torque direct-drive motor. The goal is to design the sliding mode estimator for sensorless BLDC motor in speed control. The motor’s model is established by Matlab®�{Simulink® at the beginning. Next, the sliding mode estimator is designed and added upon the speed feedback control. Finally, the hardware experiment is set up to verify the method proposed in this thesis. The whole design process will be proposed in detail in this thesis.
|
|---|
