Great topic - I am trying to understand how these low-frequency (50/60) inverters use the SAME steel-core transformer to transform a waveform generated from the battery to generate 120VAC and then drive 120VAC backwards the other direction through the Same transformer and generate DC to charge back the battery bank. It seems like they have wound 2 transformers on the same core? The AC to DC and DC to AC conversion is a separate topic but How does the transformer work??? Thanks for an explanation..
I'm not really knowledgeable on the subject. I know the old crude AC inverters just create a 120V square wave. The ones that generate a 'sine' wave use pulse width modulation so they operate the transformer at a much higher frequency than 50/60 hz. they shop the signal in to smaller bits and use PWM to re-create the 50/60 sine wave. It's like the difference between a class A and class D audio amp.
@@IMSAIGuy Thanks for the reply - best I can come up with is they use relays to move the power around and just have both functions wound on the same core with different taps - have only seen this on the integrated inverter / charger / transfer switch units.
