電動載具的發展隨著科技的進步，市場需求日益擴張，本論文
利用數位控制的方式實現三相三階馬達驅動器，並採用氮化鎵作為
功率級的開關，以達到高頻化，小型化的目的。並分析單位電流最
大轉矩控制 (Maximum Torque per Ampere, MTPA)、弱磁控制(Field
weakening)與單位電壓最大轉矩控制 (Maximum Torque per Voltage,
MPTV)三種控制方式分別對應馬達不同的動作區間，來達成對內藏
式永磁同步電機的驅動。首先是永磁同步馬達的簡述，而後是對驅
動版的簡單介紹。為了降地功率開關的應力，同時降低輸出的電流
諧波，本研究採用了三階的電路架構，並且利用二極體做為箝位器。
接著會分析不同電路架構的優缺點，以及所使用之脈波寬度調變法
為 空 間 向 量 脈 波 調 變 技 術 (Space Vector Pulse Width Modulation,
SVPWM)。接著控制法的撰寫，其中包含了馬達的數學建模、閉迴
路控制設計、不同模式的切換，最後利用 PSIM 模擬軟體驗證單位電
流最大轉矩控制法，以及 Mathcad 作為計算的軟體。最終實現輸入
電壓 48 Vdc，操作頻率為 50 kHz，輸出功率為 1 kW 的三相三階馬達
驅動器。

This thesis implements three-level three-phase motor drive with digital
control, using GaN FET as switching device to approach high frequency
and minimize. Using three different control method, MPTA, Field
weakening and MPTV, compare with three different operation sectors of
Permanent-Magnet Synchronous Motor(PMSM). At First, the thesis will
have a brief introduction of PMSM. In order to afford high voltage, we
choose three-level for the circuit, then there’s going to be analysis of
different circuit topology, the thesis implements SVPWM as our pulse
modulation method. As for control method, the thesis includes PMSM
mathematic modeling, closed loop control, control method switching, and
PSIM simulation to double check the theory and Mathcad as calculation
center. The thesis utilizes TMS430F280049 as control core which is
manufactured by Texas Instrument, EPC2022 as power switching device,
and take three-phase current and encoder as feedback signal to implement
the closed loop control of torque and rotation speed. Ultimately achieve an
input voltage 48Vdc, operation frequency at 50kHz, output power at 1kW
three-level three-phase motor drive.

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