I am presently studying inverters and I am very confused on how a square wave derived from a pure DC source like a PV module, switched on and off at even intervals (60hz for example) can be used to induce a square wave on the secondary side of a transformer.
I understand how you can also create a square wave by adding the odd harmonics of a sine wave to resemble a square wave, and a square wave produced in this method could mutually induce to the secondary side of a transformer because it contains all those AC components. However, how does the switching of pure DC from a PV panel or battery induce to the secondary of a transformer if it doesn't contain these harmonics to begin with? I would expect the only waveform you would see on the secondary would be the spiked pulses during the on/off transitions since this is the only time you would have a change in flux.
When I search online for an answer I keep getting an explanation of Fourier analysis, which seems to explain how a square wave is created from a sine wave and the sum of it's odd harmonics and NOT from a pure DC source.
I'm obviously missing something in my understanding of this. Any help is appreciated!
I understand how you can also create a square wave by adding the odd harmonics of a sine wave to resemble a square wave, and a square wave produced in this method could mutually induce to the secondary side of a transformer because it contains all those AC components. However, how does the switching of pure DC from a PV panel or battery induce to the secondary of a transformer if it doesn't contain these harmonics to begin with? I would expect the only waveform you would see on the secondary would be the spiked pulses during the on/off transitions since this is the only time you would have a change in flux.
When I search online for an answer I keep getting an explanation of Fourier analysis, which seems to explain how a square wave is created from a sine wave and the sum of it's odd harmonics and NOT from a pure DC source.
I'm obviously missing something in my understanding of this. Any help is appreciated!
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