图书简介:
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 ········································································ 53
3.1.3 含受控源的支路电流方程 ·································································· 54
3.2网孔电流法与回路电流法 ········································································ 55
3.2.1 网孔电流方程的标准形式 ·································································· 55
3.2.2 含电流源的网孔电流方程 ·································································· 56
3.2.3 含受控源的网孔电流方程 ·································································· 57
3.2.4 回路电流法 ···················································································· 58
3.3节点电压法 ·························································································· 58
3.3.1 节点电压方程的标准形式 ·································································· 58
3.3.2 含纯理想电压源支路的节点电压方程 ··················································· 61
3.3.3 含受控源的节点电压方程 ·································································· 63
3.4应用实例 ····························································································· 64
本章小结 ··································································································· 66
习题 3 ······································································································· 66
第 4章电路的基本定理 ······································································70
4.1叠加定理 ····························································································· 70
4.1.1 叠加定理的基本内容 ········································································ 70
4.1.2 应用叠加定理的注意事项 ·································································· 71
4.1.3 线性电路的齐次性与可加性 ······························································· 72
4.2替代定理 ····························································································· 74
4.3等效电源定理 ······················································································· 75
4.3.1 戴维南定理 ···················································································· 75
4.3.2 诺顿定理 ······················································································· 79
4.4昀大功率传输定理 ················································································· 81
4.5特勒根定理和互易定理 ··········································································· 83
4.5.1 特勒根定理 ···················································································· 83
4.5.2 互易定理 ······················································································· 86
4.6应用实例 ——数/模转换器 ······································································· 89
本章小结 ··································································································· 91
习题 4 ······································································································· 92
第 5章正弦稳态电路的分析·································································96
5.1正弦量的基本概念 ················································································· 96
5.1.1 频率与周期 ···················································································· 97
5.1.2 振幅与有效值 ················································································· 97
5.1.3 初相位 ·························································································· 98
5.2正弦量的相量表示法 ············································································ 100
5.2.1 复数及其运算 ··············································································· 100
5.2.2 相量的概念 ·················································································· 102
5.2.3 相量图 ························································································ 103
5.2.4 相量的运算性质 ············································································ 104
5.3两类约束的相量形式 ············································································ 105
5.3.1 基尔霍夫定律的相量形式 ································································ 105
5.3.2 电路元件伏安关系的相量形式 ·························································· 106
5.4无源单口网络的阻抗 ············································································ 110
5.4.1 阻抗的概念 ·················································································· 110
5.4.2 阻抗的串联和并联 ········································································· 112
5.4.3 电路的相量模型 ············································································ 114
5.5正弦稳态电路的相量法分析 ··································································· 115
5.5.1 简单交流电路的分析 ······································································ 115
5.5.2 复杂交流电路的分析 ······································································ 119
5.6正弦交流电路的功率 ············································································ 121
5.6.1 瞬时功率 ····················································································· 121
5.6.2 平均功率和功率因数 ······································································ 122
5.6.3 无功功率 ····················································································· 123
5.6.4 视在功率 ····················································································· 124
5.6.5 复功率 ························································································ 127
5.6.6 电路功率因数的提高 ······································································ 128
5.6.7 正弦交流电路中的最大功率传输 ······················································· 130
5.7电路的频率响应 ·················································································· 132
5.7.1 网络函数和频率特性 ······································································ 132
5.7.2 RC低通滤波电路 ·········································································· 133
5.7.3 RC高通滤波电路 ·········································································· 134
5.8谐振电路 ··························································································· 135
5.8.1 串联谐振 ····················································································· 135
5.8.2 并联谐振 ····················································································· 138
5.9应用实例 ··························································································· 140
5.9.1 日光灯电路 ·················································································· 140
5.9.2 收音机调谐电路 ············································································ 141
5.9.3 按键式电话机 ··············································································· 142
5.9.4 交叉网络 ····················································································· 143
本章小结 ································································································· 144
习题 5 ····································································································· 147
第 6章耦合电感和理想变压器 ·····························································151
6.1耦合电感 ··························································································· 151
6.1.1 互感 ··························································································· 151
6.1.2 耦合电感的伏安关系 ······································································ 152
6.1.3 耦合电感的同名端 ········································································· 153
6.1.4 耦合电感的等效电路模型 ································································ 155
6.2含耦合电感的正弦稳态电路的分析 ·························································· 156
6.2.1 直接列写方程法 ············································································ 156
6.2.2 去耦等效分析法 ············································································ 157
6.3空心变压器························································································ 162
6.4理想变压器 ························································································ 164
6.4.1 理想变压器的基本性质 ··································································· 164
6.4.2 含理想变压器的电路分析 ································································ 166
6.5应用实例 ··························································································· 167
6.5.1 变压器用做隔离装置 ······································································ 167
6.5.2 变压器用做阻抗匹配器 ··································································· 168
本章小结 ································································································· 169
习题 6 ····································································································· 170
第 7章三相电路·············································································174
7.1三相电源 ··························································································· 174
7.1.1 三相电源的产生 ············································································ 174
7.1.2 三相电源的连接 ············································································ 175
7.2对称三相电路 ····················································································· 177
7.2.1 负载 Y形连接 ··············································································· 177
7.2.2 负载△形连接 ··············································································· 179
7.3不对称三相电路·················································································· 181
7.3.1 负载 Y形连接 ··············································································· 181
7.3.2 负载△形连接 ··············································································· 183
7.4三相电路的功率 ·················································································· 184
7.4.1 平均功率 ····················································································· 184
7.4.2 无功功率 ····················································································· 184
7.4.3 视在功率 ····················································································· 185
7.4.4 瞬时功率 ····················································································· 185
7.4.5 三相功率的测量 ············································································ 186
7.5应用实例 ··························································································· 187
7.5.1 相序测定电路 ··············································································· 187
7.5.2 家庭电路 ····················································································· 188
7.5.3 三相电路实例分析 ········································································· 189
本章小结 ································································································· 190
习题 7 ····································································································· 192
第 8章非正弦周期电流电路································································194
8.1非正弦周期信号及其傅里叶级数展开 ······················································· 194
8.1.1 非正弦周期信号 ············································································ 194
8.1.2 非正弦周期信号的傅里叶级数展开 ···················································· 195
8.2非正弦周期信号的有效值和平均功率 ······················································· 196
8.2.1 非正弦周期信号的有效值 ································································ 196
8.2.2 非正弦周期电流电路的平均功率 ······················································· 197
8.3非正弦周期电流电路的分析 ··································································· 199
8.4应用实例 ··························································································· 201
本章小结 ································································································· 203
习题 8 ····································································································· 204
第 9章动态电路的时域分析································································206
9.1动态电路的暂态过程及换路定则 ····························································· 206
9.1.1 动态电路的基本概念 ······································································ 206
9.1.2 换路定则与电路初始值的确定 ·························································· 207
9.2一阶电路的零输入响应 ········································································· 209
9.2.1 一阶 RC电路的零输入响应 ····························································· 209
9.2.2 一阶 RL电路的零输入响应 ······························································ 211
9.3一阶电路的零状态响应 ········································································· 213
9.3.1 一阶 RC电路的零状态响应 ····························································· 213
9.3.2 一阶 RL电路的零状态响应 ······························································ 215
9.4一阶电路的全响应和三要素法 ································································ 217
9.4.1 一阶电路的全响应 ········································································· 217
9.4.2 一阶电路的三要素法 ······································································ 218
9.5阶跃函数和阶跃响应 ············································································ 222
9.5.1 阶跃函数 ····················································································· 222
9.5.2 阶跃响应 ····················································································· 223
9.6冲激函数和冲激响应 ············································································ 225
9.6.1 冲激函数 ····················································································· 225
9.6.2 冲激响应 ····················································································· 226
9.7二阶电路的零输入响应 ········································································· 229
9.7.1 二阶电路方程的建立 ······································································ 230
9.7.2 二阶电路零输入响应的形式 ····························································· 230
9.8应用实例 ··························································································· 236
9.8.1 冰箱延时保护电路 ········································································· 236
9.8.2 积分电路和微分电路 ······································································ 236
9.8.3 方波发生电路 ··············································································· 237
9.8.4 闪光灯电路 ·················································································· 238
本章小结 ································································································· 240
习题 9 ····································································································· 242
第 10章双口网络 ···········································································245
10.1双口网络的基本概念 ·········································································· 245
10.2双口网络的参数方程 ·········································································· 246
10.2.1 阻抗方程与 Z参数 ······································································· 246
10.2.2 导纳方程与 Y参数 ······································································· 249
10.2.3 传输方程与 T参数 ······································································· 251
10.2.4 混合方程与 H参数 ······································································· 252
10.3含双口网络的电路分析 ······································································· 256
10.3.1 含双口网络的电路 ······································································· 256
10.3.2 双口网络的连接 ·········································································· 257
10.4线性双口网络的等效电路 ···································································· 261
10.4.1 互易双口网络的等效电路 ······························································ 261
10.4.2 非互易双口网络的等效电路 ··························································· 263
10.5应用实例 ························································································· 264
10.5.1 放大电路等效模型 ······································································· 264
10.5.2 阻抗匹配电路 ············································································· 265
本章小结 ································································································· 266
习题 10 ··································································································· 268
第 11章非线性电阻电路····································································272
11.1非线性电阻 ······················································································ 272
11.1.1 非线性电阻概述 ·········································································· 272
11.1.2 非线性电阻的静态电阻和动态电阻 ·················································· 273
11.1.3 非线性电阻的串联和并联 ······························································ 274
11.2非线性电阻电路的分析 ······································································· 275
11.2.1 解析法 ······················································································· 275
11.2.2 图解法 ······················································································· 276
11.2.3 分段线性化法 ············································································· 277
11.2.4 小信号分析法 ············································································· 279
11.3应用实例 ························································································· 282
11.3.1 限幅电路 ···················································································· 282
11.3.2 整流电路 ···················································································· 283
本章小结 ································································································· 283
习题 11 ··································································································· 284
习题答案
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本书是浙江省普通高校“十三五”新形态教材建设项目的研究成果,与浙江省精品在线开放课程《电路分析基础》相配套。它以纸质教材为基础,将多种类型的数字化教学资源(微课、课件、题库、在线测试等)通过二维码技术与文本紧密关联,支持学生通过移动终端随时随地进行学习。本书既突出了有关知识点的叙述,又兼顾了课程内容的完整性和系统性,在不增加纸质教材的篇幅和成本的同时,大大丰富和提升了教材的内涵。因此,本书不仅适用于传统方法教学,同时还适用于 MOOC教学需求。
本教材是为普通本科院校和高职院校电子信息类、电气自动化类、通信类、控制类等专业及其他相关专业的本科学生编写,根据应用型院校学生的知识基础和认知规律组织内容。在内容选材上立足于“加强基础、学以致用、突出重点、联系实际”的原则,在文字叙述上力求做到思路清晰、语言通俗易懂,方便学生自学和教师授课。
为满足“应用型人才”的培养需求,本书在编写过程中注重结合工程实践,在每一章的昀后都增加一节介绍电路理论的应用实例,将电路理论和实践应用有机结合起来,帮助学生建立起研究实际电路问题的思维模式和兴趣,培养学生的工程意识。本书所配例题具有典型性并能适当兼顾工程实际,还配有一定数量、难易适当的习题,并在书中给出了大部分习题的参考答案,以供读者选用。书中正文、例题、习题密切结合,便于读者自学,以适应启发性教学方法的需要。
本书内容丰富,资源充足。所有的知识点都配有微课视频、电子课件,每一节配有在线测试,每一章配有综合测试及讨论答疑区。本书还提供各章的小结视频和各章的测试题讲解视频。本书共有视频 107个,单元测试 52个,章节综合测试 11个(题量超过 500题)。扫描二维码就可以观看视频、完成在线测试并实时查看测试成绩以及参与线上交流讨论等。因此,该书不仅有助于培养学生的自主学习能力,同时特别适合开展翻转课堂、混合式教学等新型教学模式。
本书在编写过程中,参考了许多教材,这些资料均在参考文献中列出,在此对这些教材的作者表示衷心的感谢。课程组教师潘兰芳老师也对本书提出许多宝贵意见,在此表示感谢。
由于编者水平和能力有限,书中难免有不足或错误之处,敬读者不吝赐教,批评指正。
编者 2017年 6月
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