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所在平台: Udemy |
课程主页: https://www.udemy.com/course/spwm-using-matlab/
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**课程名称：** 使用 MATLAB 的正弦脉冲宽度调制 (SPWM) **课程概述：** 本课程深入讲解了正弦脉冲宽度调制 (SPWM) 技术，这是一种在逆变器中广泛应用的脉冲宽度调制方法。课程将解释逆变器如何通过开关电路将直流电转换为交流电，并通过生成一系列具有特定宽度和间隔的方波脉冲来逼近正弦波。 **核心内容：** * **SPWM 原理：** 详细阐述 SPWM 的工作原理，包括如何通过调整脉冲宽度来模拟正弦波的幅值变化。课程将重点介绍脉冲宽度如何随着半个周期（半周期）的进展而变化，靠近半周期两端的脉冲较窄，而靠近中心的脉冲较宽。 * **电压调节：** 说明如何通过同时放大或缩小所有脉冲的宽度，并且保持它们之间的正弦比例关系，来改变逆变器的有效输出电压。 * **SPWM 的优势：** 强调 SPWM 技术在电流（on-time）变化方面的特点，以及它在逆变器应用中的重要性。 * **MATLAB/Simulink 应用：** 通过在 MATLAB/Simulink 中进行仿真，帮助学员掌握 SPWM 的实践应用。学员将能够独立设计和模拟自己的逆变器，从而加深对 SPWM 及其相关高级 PWM 技术的理解。 **学习目标：** 通过本课程的学习，学员将能够： * 理解 SPWM 的基本原理和工作机制。 * 掌握如何使用 MATLAB/Simulink 仿真 SPWM 逆变器。 * 了解 SPWM 在实际逆变器设计中的应用。 * 为进一步学习更高级的 PWM 技术奠定坚实的基础。
The term SPWM stands for "Sinusoidal pulse width modulation" is a technique of pulse width modulation used in inverters. An inverter generates an output of AC voltage from an input of DC with the help of switching circuits to reproduce a sine wave by generating one or more square pulses of voltage per half cycle. If the size of the pulses is adjusted, the output is said to be pulse width modulated. With this modulation, some pulses are produced per half cycle. The pulses close to the ends of the half cycle are constantly narrower than the pulses close to the center of the half cycle such that the pulse widths are comparative to the equivalent amplitude of a sine wave at that part of the cycle. To change the efficient output voltage, the widths of all pulses are amplified or reduced while keeping the sinusoidal proportionality. With PWM (pulse width modulation), only the on-time of the pulses are changed during the amplitudes. SPWM is one of the most commonly used PWM technique that is employed in inverters. With a strong understanding of SPWM you can simulate your own inverter in MATLAB/Simulink and you build up a better understanding in the advanced PWM techniques used.
