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單元 四：三相電流控制變流器

單元 四：三相電流控制變流器. 學習內容. 三相變流器模型推導. ABC<=>DQ 轉換. 三相電感電流控制原理. 三相 PWM 原理. 三相瞬時電壓控制原理. +. V d. _. Z C. Z B. Z A. 控制方塊圖. I oA. a. L. T1. T3. T5. I LA. I oB. b. A. B. L. C. I LB. I oC. c. T2. T4. T6. I LC. L. N. C. C. C. I capa. T1~T6. I capc. I capb.

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單元 四：三相電流控制變流器

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  1. 單元四：三相電流控制變流器 • 學習內容 三相變流器模型推導 ABC<=>DQ 轉換 三相電感電流控制原理 三相PWM原理 三相瞬時電壓控制原理

  2. + Vd _ ZC ZB ZA 控制方塊圖 IoA a L T1 T3 T5 ILA IoB b A B L C ILB IoC c T2 T4 T6 ILC L N C C C Icapa T1~T6 Icapc Icapb Drive circuit n S1~S6 Ioa Iob Ioc PWM circuit ks Vab Vbc Vca vconC vconA vconB dq-to-abc transformation abc-to-dq transformation kv vconq vcond ioq iod Current Controller Line_abc-to-dq vod voq Voltage Controller

  3. 三相PWM原理

  4. 1 2 • 變流器模型推導 PWM 三相電流之控制相互耦合 !

  5. ABC DQ 轉換原理 1 2 3 4 d-axis c-axis coswt a-axis sinwt q-axis b-axis 藉由ABCDQ軸轉換，電壓及電流之控制均可解耦

  6. Line_ABC DQ 轉換原理 Vdn d-axis c-axis Vcb Vab Vcn coswt Van Vqn sinwt a-axis q-axis Vbn -Vcb b-axis Vbc

  7. 4 3 ILi iL Current loop + Ioi Vci Icapi icapi + ifb + 1 1/ks - vcj kv k2 • Current 及 Voltage Controllers設計 Current controller Vci - vff + - vconi + vfb + + k1 Ioi - ioi Power circuit Voltage controller Design of ui and uvis the same as 1-phase

  8. Simulink 模擬

  9. 模擬結果

  10. 系統設計 System Parameters L = 3mH, C = 22mF, Vo,phase = 60V(p) Specification ui = 1.25KHz = 21250 rad/s = 7854 rad/s uv = 300Hz = 1885 rad/s Design kpwm = 150/10 = 15

  11. Load Input Power 3f-Inverter D - 100W Power Module 140VDC PCI-6025E A/D [2 3 4 5 6 7 8] PC 電路連接及設定 SW1 SW2 SW3 SW4 ON

  12. Simulink方塊連接

  13. 量測波形 (PC)

  14. 量測波形 (示波器) 輸出電壓(A相) 電感電流(B相)

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