特向电路大神请教一道电路考研习题,电路如下图,已知端口电压相量U和电流相量I同相,且U1=102V,U2=72V,功率表的读数为1500w,求R1、R2、XL、Xc.
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特向电路大神请教一道电路考研习题,电路如下图,已知端口电压相量U和电流相量I同相,且U1=102V,U2=72V,功率表的读数为1500w,求R1、R2、XL、Xc.
特向电路大神请教一道电路考研习题,
电路如下图,已知端口电压相量U和电流相量I同相,且U1=102V,U2=72V,功率表的读数为1500w,求R1、R2、XL、Xc.
特向电路大神请教一道电路考研习题,电路如下图,已知端口电压相量U和电流相量I同相,且U1=102V,U2=72V,功率表的读数为1500w,求R1、R2、XL、Xc.
Z=R1+(R2·XC^2)/R2²+XC²
P=U·I=1500=U²/Z
Ù1=Ì·(R1+jXL)=102∠arctan(XL/R1)
Ù2=Ì·[R2∥(-jXC)]=72∠arctan(-R2/XC)
又Ù=Ù1+Ù2 代入3.4 求得U