电路分析基础

第 1章电路的基本概念与基本定律·························································· 1
1.1电路的组成与电路模型 ············································································ 1
1.1.1 电路的组成及其作用 ········································································· 1
1.1.2 电路模型 ························································································ 2
1.2电路的基本物理量 ·················································································· 3
1.2.1 电流 ······························································································ 3
1.2.2 电压和电位 ····················································································· 5
1.2.3 功率 ······························································································ 7
1.3基尔霍夫定律 ························································································ 8
1.3.1 基尔霍夫电流定律 ············································································ 9
1.3.2 基尔霍夫电压定律 ··········································································· 10
1.4无源元件 ····························································································· 12
1.4.1 电阻元件 ······················································································· 12
1.4.2 电容元件 ······················································································· 14
1.4.3 电感元件 ······················································································· 16
1.5有源元件 ····························································································· 18
1.5.1 独立电源 ······················································································· 18
1.5.2 受控电源 ······················································································· 20
1.6应用实例 ····························································································· 23
1.6.1 电吹风机 ······················································································· 23
1.6.2 汽车油箱油量检测电路 ····································································· 25
本章小结 ··································································································· 26
习题 1 ······································································································· 28
第 2章电路的等效变换 ······································································32
2.1二端网络等效的概念 ·············································································· 32
2.2电阻的等效变换 ···················································································· 33
2.2.1 电阻的串并联等效变换 ····································································· 33
2.2.2 电阻的 Y-△等效变换 ······································································· 35
2.3电源的等效变换 ···················································································· 37
2.3.1实际电源的两种模型及其等效变换 ······················································ 37
2.3.2 理想电源的串并联等效 ····································································· 39
2.4电路的等效分析 ···················································································· 41
2.5无源二端网络的等效电阻 ········································································ 42
2.6应用实例 ····························································································· 43
2.6.1直流电表的设计 ·············································································· 43
2.6.2 惠斯通电桥电路 ·············································································· 45
本章小结 ··································································································· 46
习题 2 ······································································································· 48
第 3章电路的基本分析方法·································································52
3.1支路电流法 ·························································································· 52
3.1.1 两类约束和电路方程 ········································································ 52
3.1.2 支路电流方程的列写 ·····································································