I was reading into the basics of welding power supply (because I have taken up TIG welding) and inductive heating (because it is part of a number of applications in metal fabrication), and I noticed that the two seem to share basic concepts also found in radio circuitry, namely the idea that you adjust the frequency of an AC signal.
To my newbie eye, it seems like an inductive heater is a high power radio sans the information encoding and with a coil where the antenna was, and the welding machine seems to replace the coil with an arc, but I might well be off track there.
Now, I only have a very rudimentary understanding of electronics, yet. I have worked with sensors that measured electricity for a couple of years, so I have a basic understanding of AC power, and I have heard of inductive and capacitive loads.
If I were to draw a block diagram (with functional groups instead of the actual circuitry), what would be common elements in the three types of devices? It seems I usually have a rectifier followed by an inverter, to change grid AC to "my-frequency" AC. Then there seems to be something called a "resonant tank circuit", and I have read the Wikipedia page, but I am not exactly sure if I have really understood it already.
My immediate goal here is to have a map for learning more about these topics, i. e. I would like to understand the larger building blocks of those devices first, gain some vocabulary that I can use for further study, and then work my way down to how the details work. Pointers to learning resources are appreciated.