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maxwells_demon

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- TL;DR Summary
- Was wondering why PWM is widely-used in present inverter technology, instead of just outright filtering a square wave? What's the mathematical basis? Or is it somehow more technologically convenient or efficient? Are there papers pointing out why they are so?

Need some sources on why PWM is widely used in inverters for DC - AC conversion applications, and their mathematical basis?

Basically, I was wondering why inverters had to use PWM, instead of just getting a square wave of let's say a 50Hz frequency and just filtering out the odd order harmonics that comprise it by using some series of low pass filters to arrive at the fundamental 50Hz sine wave? What makes PWM for Sine-Wave Generation better than outright filtering a square wave?

Basically, I was wondering why inverters had to use PWM, instead of just getting a square wave of let's say a 50Hz frequency and just filtering out the odd order harmonics that comprise it by using some series of low pass filters to arrive at the fundamental 50Hz sine wave? What makes PWM for Sine-Wave Generation better than outright filtering a square wave?