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所在平台: Udemy |
课程主页: https://www.udemy.com/course/basic-fundamentals-of-ac-circuit-analysis/
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课程名称：交流电路分析基础知识 课程概述：交流电流（AC）是指一种电流，具有周期性反转方向和随时间持续变化的幅度，这与只向一个方向流动的直流电（DC）相对。交流电是电力传输给商业和住宅的主要形式，消费者在插入厨房电器、电视、风扇和电灯时，通常使用的也是这种电能。常见的直流电源来源是手电筒的电池。 在大多数电力电路中，交流电的波形通常是正弦波，其正半周期对应于电流的正方向，反之亦然。在某些应用场景，如吉他扩音器中，会使用不同的波形，如三角波或方波。通过电线传输的音频和无线电信号也是交流电的例子，这些信号携带信息，例如声音和图像，通常通过调制AC载波信号进行传输，且这些电流的频率通常高于电力传输使用的频率。 本课程将专注于正弦波形，旨在让学生理解与交流电有关的电路基础知识，包括正弦波形、向量与相量、R、L、C电路的电抗和阻抗，以及其与电学基本定律和定理的关系。课程内容涵盖交流电功率、功率因数、谐振、复数、电抗和阻抗等主题，为学生在电气工程领域打下基础。
Alternating current (AC) is an electric current that periodically reverses direction and changes its magnitude continuously with time in contrast to direct current (DC) which flows only in one direction. Alternating current is the form in which electric power is delivered to businesses and residences, and it is the form of electrical energy that consumers typically use when they plug kitchen appliances, televisions, fans and electric lamps into a wall socket. A common source of DC power is a battery cell in a flashlight. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.The usual waveform of alternating current in most electric power circuits is a sine wave, whose positive half-period corresponds with positive direction of the current and vice versa. In certain applications, like guitar amplifiers, different waveforms are used, such as triangular waves or square waves. Audio and radio signals carried on electrical wires are also examples of alternating current. These types of alternating current carry information such as sound (audio) or images (video) sometimes carried by modulation of an AC carrier signal. These currents typically alternate at higher frequencies than those used in power transmission.This course deals specifically with sinusoidal waveforms and will provide the student with the basic understanding of working with circuits involving Alternating Current, which includes sinusoidal waveforms, vectors & phasors, reactance & impedance of R,L,C circuits, as they relate to the basic laws and theorems of electricity. This includes working with AC Power, Power Factor, Resonance, Complex Numbers, Reactance and Impedance
