第4部分三相交流电路

AmBmCmsin sin(120)sin(120)eEteEteEtj0Aj 120Bj120CeeeEEEEEEABCABC00eeeEEEABUBCUCAUlUlIANUBNUCNUpUpIABANBNBCBNCNCACNANUUUUUUUUU图4.2 三相电源的星形连接oj0ANj 120BNj120CNeeeUUUUUUj30j30ABANBNlj 90j 90BCBNCNlj150j150CACNANl3ee3ee3eeUUUUUUUUUUUUUUUl3UU3ABAXBCBCACYZUUUUUUlUUAXBYCZ0UUUNANBNCN0IIIIAB380 2sin(60)Vutl380220V33UUAN220 2sin(30)Vut22226810ZRX8arctanarctan536XR2202210UIZAN22 2sin(3053)22 2sin(23)itt BNCN22 2sin(23120)22 2sin(143)22 2sin(23120)22 2sin(97)ittitt NANBNCN0iiiijA BABA BAAj(120)B CBCB CBBj(120)C ACAC ACCeeeUUIIZZUUIIZZUUIIZZ j(30)j(30)AA BC Alj(150)j(150)BBA Blj(90)j(90)CC AB Cl3 ee3 ee3 eeCIIIIIIIIIIIIIII 1/33801920UIZl33 1933IIl220 3380VUU123PPPPll3cos3cosPU IU I22SPQll33SU IU IcosSPABCppppll3sin3sinQU IU IAA A2sin()2sin()pu iUtItcoscos(2 )U ItBB B2sin(120)2sin(120)pu iUtIt coscos(2 240)U ItCC C2sin(120)2sin(120)pu iUtIt coscos(2 240)U ItABC3cosppppU IP 22161220Z 16cos0.820RZl380220V33UUl2201120UIIZll3cos3380 11 0.85.8kWPU Il380VUUl3803333320UIIZll3cos338033 0.817.4kWPU I