解ï¼ZLä»çµè·¯ä¸æå¼ãçµå®¹çµæµä¸ºIï¼ç¸éï¼/3=I/3ââ为书åæ¹ä¾¿ï¼ä»¥ä¸ç´æ¥ç¨åæ¯ä»£è¡¨ç¸éã
çµæçµæµæ ¹æ®KCLï¼I+I/3=4I/3ã
LVLï¼1ÃI+j1Ã4I/3=10â 0°ï¼è§£å¾ï¼I=10/ï¼1+j4/3ï¼=30/ï¼3+j4ï¼=30/5â 53.13°=6â -53.13°ï¼Aï¼ãI/3=2â -53.13°ã
æ以ï¼Uoc=Uab=ï¼-j0.5ï¼ÃI/3+j1Ã4I/3=0.5â -90°Ã2â -53.13°+1â 90°Ã4Ã2â -53.13°=1â -143.13°+8â 36.87°=-0.8-j0.6+6.4+j4.8=5.6+j4.2=7â 36.87°ï¼Vï¼ã
å°çµåæºçè·¯ï¼ä»aãbå¤å çµåU0ï¼è®¾æµå ¥çµæµä¸ºI0ã
æ ¹æ®KCLï¼å¾å°åæ¯è·¯ççµæµå¦ä¸å¾ã
KVLï¼1ÃI+j1Ãï¼4I/3+I0ï¼=0ï¼I=0.6â -143.13°ÃI0=ï¼-0.48-j0.36ï¼I0ã
I0+I/3=I0+ï¼-0.16-j0.12ï¼I0=ï¼0.84-j0.12ï¼I0ã
æ以ï¼U0=ï¼-j0.5ï¼Ãï¼I0+I/3ï¼-1ÃI=ï¼-j0.5ï¼Ãï¼0.84-j0.12ï¼I0-ï¼-0.48-j0.36ï¼I0=ï¼-0.06-j0.42ï¼I0+ï¼0.48+j0.36ï¼I0=ï¼0.42-j0.06ï¼I0ã
æ以ï¼Zeq=U0/I0=0.42-j0.06ï¼Î©ï¼ã
æ大åçä¼ è¾å®çï¼å½ZL=Zeq*ââå³Zeqçå
±è½å¤æ°ââ=0.42+j0.06ï¼Î©ï¼æ¶ï¼ZLè·å¾æ大åçãPLmax=Uoc²/ï¼4Rï¼=7²/ï¼4Ã0.42ï¼=175/6ï¼Wï¼=29.1667ã