以碳化硅（SiC）功率晶体管为基础之全桥式微逆变器（Micro-inverter）.pdf

1、以碳化矽(SiC)功率電晶體為基礎之全橋式微逆變器(Micro-inverter)1Prepared by:AEC High Power LAB(HPL)大綱1.方案規格2.系統方塊圖3.電路圖/PCBA/實體圖4.PLL 架構5.控制演算法6.軟件7.主要元件8.測試報告9.發佈套件21.方案規格(MPPT)3ParameterValueVin_nominal(額定輸入電壓)36VVin_max(最大輸入電壓)55VVin_min(最小輸入電壓)18VMPPT_DC input range(MPPT DC 輸入電壓範圍)20V to 40VIin(額定輸入電流)12AImax(最大輸入電流)

2、18A1.方案規格(Inverter)4ParameterValueVbus(DC-DC 額定輸出電壓)380VVbus_max(DC-DC 最大輸出電壓)400VVac(AC 額定輸出電壓)110VAC/60Hz,220VAC/50HzIac(AC 最大輸出電流)1.8A/220VAC,3.6A/110VACPac(最大輸出功率)400W2.系統方塊圖 5Source:AN4070 Application note()2.系統方塊圖 DC-DC Converter6Source:AN4070 Application note()Gate 1Gate 2I(L2)I(L1)I(MOS2)I(M

3、OS1)I(D1)I(D2)2.系統方塊圖 DC-DC Converter(波形)7Source:AN4070 Application note()2.系統方塊圖DC-DC Converter(參數設計)Calculation of the maximum duty cycle:In this topology the switch duty cycle is always 0.5.Lets call D the time beyond/2 for which the MOSFET is still closed:=,0.5=0.2(1),=0.7 (2)Calculation of maxi

4、mum input power:=4000.94=425.5(3)8Source:AN4070 Application note()2.系統方塊圖DC-DC Converter(參數設計)Calculation of maximum average input current:,=,=425.518=23.6(4)Calculation of the maximum switch RMS current:,=22,=20.22 12.8=8.6(5)Calculation of the maximum average output current:,=,=400370=1.08(6)9Sour

5、ce:AN4070 Application note()2.系統方塊圖DC-DC Converter(參數設計)Calculation of transformer turn ratio:21=2 12=3802 10.2230=2.53(7)where is chosen as the average between the maximum and minimum input voltage value.The final transformer turn ratio has been chosen equal to 2.6.10Source:AN4070 Application note(

6、)2.系統方塊圖DC-AC Converter11Source:AN4070 Application note()2.系統方塊圖DC-AC Converter(參數設計)The minimum value of capacitance required on the DC bus is calculated according to the following equation:=4,21=44004.171033702=48.74(8)where 1 is given by1=4.17=14=1460(9)A total capacitance of about twice the calc