为什么需要引入相量法？

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播放列表名称：电路 • 第一周 电路模型和电路定律（1） • 电路的基本概念测验题 • 1-1 电路概述 • 1-2 电路模型 • 1-3 基本电路物理量：电流、电压、电功率和能量 • 1-4 电流和电压的参考方向 • 1-5 电路元件—电阻 • 1-6 电路元件—电压源和电流源 • 1-7 受控电源 • 第二周 电路模型和电路定律（2） • 1-8 基尔霍夫电流定律 • 1-9 基尔霍夫电压定律 • 1-10 KCL和KVL的综合运用 • KCL和KVL测验题 • 第三周 电阻电路的等效变换 • 等效变换测验题 • 2-1 电路的等效变换 • 2-2 电阻的串联和并联 • 2-3 电压源、电流源的串联和并联 • 2-4 实际电源的两种模型及其等效变换 • 第四周 电阻电路的一般分析 • 回路电流法和结点电压法测验题 • 3-1 回路电流法 • 3-2 结点电压法 • 3-3 结点电压法和回路电流法比较 • 第五周 电路定理 • 电路定理测验题 • 4-1 叠加定理 • 4-2 替代定理 • 4-3 戴维宁定理 • 4-4 戴维宁等效电路求解 • 4-5 诺顿定理及其等效电路求解 • 4-6 最大功率传输定理 • 4-7 特勒根定理、互易定理和对偶原理（本内容视频中没有，供有兴趣同学参考，MOOC考试不考） • 第六周 动态电路的时域分析（1） • 动态电路的时域分析（1）测验题 • 5-1 电容元件 • 5-2 电感元件 • 5-3 动态电路的方程 • 5-4 动态电路的初始条件 • 5-5 一阶电路的零输入响应 • 5-6 一阶电路的零状态响应 • 第七周 动态电路的时域分析（2） • 动态电路的时域分析（2）测试题 • 5-7 一阶电路的全响应 • 5-8 一阶电路分析的三要素法 • 5-9 二阶电路 • 第八周 相量法 • 相量法测验题 • 6-1 为什么需要引入相量法？ • 6-2 复数 • 6-3 正弦量 • 6-4 相量法的引入 • 6-5 电路定律的相量形式 • 6-6 阻抗和导纳 • 第九周 正弦稳态电路的分析（1） • 7-1 正弦稳态电路的分析 • 7-2 相量图 • 正弦稳态电路的分析和相量图测验题 • 第十周 正弦稳态电路的分析（2） • 正弦稳态电路的功率 • 7-3 正弦稳态电路的功率——瞬时功率 • 7-4 7-5 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