本文旨在研製無槽式永磁同步馬達轉速及電流閉迴路控制的驅動系統。本文採用之馬達結構為轉子4極、定子無槽式12槽。在三相三臂型變頻器方塊，採用電壓空間向量脈波寬度調變，以提高系統直流鏈電壓利用率。使用電流感測元件及霍爾角度感測器做系統之回授裝置，以回授轉子機械角位置及馬達側相電流。藉由轉子旋轉座標系統轉換為交直軸電流，以完成轉速及電流閉迴路控制系統，來提升驅動系統之性能。使用外加電感串聯於馬達之策略，以抑制電流漣波及降低電流總諧波失真率，減少轉矩漣波。
本文採用Matlab/Simulink軟體模擬三相變頻器及無槽式永磁同步馬達之轉速及電流閉迴路控制，以驗證本文控制策略之可行性。在驅動系統方塊，其控制核心採用德州儀器公司出品之數位控制器TMS320F280049，控制策略皆以軟體實現，具可塑性及可靠度。控制取樣頻率與PWM切換頻率皆為20 kHz，無槽式永磁同步馬達於轉速命令為6000 rpm，負載轉矩約為0.05 N-m，外加串聯電感與馬達每相等效電感相等，其模擬結果於穩態時a相相電流峰值為5.114 A，電流總諧波失真率為27.83 %。其實測結果於穩態時a相相電流峰值約為4.84 A，電流總諧波失真率為27.52 %。綜合上述，由實測結果驗證本文控制策略之可行性。

This thesis aims to develop a drive system with closed-loop control of speed and current for a Slotless Permanent-Magnet Synchronous Motor (SPMSM). The structure of the PMSM developed in this thesis is a 4-pole rotor and a slotless 12-slot stator. In the three-phase inverter, the voltage space vector pulse width modulation is adopted to improve the utilization rate of the DC link voltage. The current sensor and the Hall angle sensors are used as the feedback device to return the mechanical angular position of the rotor and the current of the motor. The rotor rotation coordinate system is converted into q-d axis currents to complete the closed-loop control system of speed and current to improve the performance of the drive system. Using the strategy of adding an external inductor in series with the motor to suppress the current ripple, reduce the current total harmonic distortion rate and reduce torque ripple.
In this thesis, Matlab/Simulink software is used to simulate the speed and current closed-loop control of a three-phase inverter and a slotless PMSM to verify the feasibility of the control strategy. In the drive system block, the core control is realized by using the digital controller TMS320F280049 produced by Texas Instruments (TI). The sampling frequency and the PWM switching frequency are both 20 kHz, the speed command of the slotless PMSM is 6000 rpm, the load torque is about 0.05 N-m. The added series inductor is equal to the equivalent inductance of each phase of the motor. Simulation result is shows the peak value of a’s phase current at steady state is 5.114 A, the current total harmonic distortion rate is 27.83 %. In fact, the measured results show that the peak value of phase a’s phase current at steady state is about 4.84 A, and the current total harmonic distortion rate is 27.52 %.
Based on the information mentioned above, the feasibility of the control strategy in this paper is verified by the measured results.

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