7500用户输入值中间量输出值22039.80.8可直接输入电枢回路电阻,Ra=0.396454635Ra的公式修改后请改回(C6*C9-C3)*0.5/C9/C9I1=2IN=79.63m取值1,2,3Rm=2.763819095λ=1.910316695I2=41.66848367IL=0.8IN=31.84AI2/IL=1.308683532大于1.2有效R1=λRa=0.757353908R2=λR1=1.446785814m取1时忽略R2,R3R3=λR2=2.763819095m取2时忽略R3r1=R1-Ra=0.360899273r2=R2-R1=0.689431906m取1时忽略r2,r3r3=R3-R2=1.317033281m取2时忽略r3估算电枢回路电阻Ra已知额定电流ININ=TL/TN=拖动负载TL/TN他励直流电动机启动电阻计算已知额定功率PN已知额定电压UNPN=UN=说明ΩΩWVAΩA最大电流与切换电流比λ校验切换电流I2若可以满足启动要求,求各级电阻AΩ求各分段电阻ΩΩΩm=Ω取最大电流I1=2IN末级电阻Rm设置电阻级数m