obsidian-notes/射频/名词解释/SPWM.md
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---
title: SPWM
updated: 2022-01-12 02:36:56Z
created: 2022-01-10 03:35:59Z
---
# 定义
SPWM:Sinusoidal Pulse Width Modulation正弦脉冲宽度调制。
# 与PWM的区别
- PWM是脉冲宽度调制也就是具有一定脉冲宽度的连续的方波组成。
- SPWM是在PWM基础上用正弦波来调制合成的具有正弦波规律变化的方波
SPWM就是正弦波等效于一系列等幅不等宽的矩形脉冲波形其脉冲宽度有正弦波和三角波自然相交而成