Recent content by elcraft

So there is no paradigm with reliable recommendations or relevant discoveries?

Hello, Is it true that when using transformers and three-phase drives/VFDs for induction motors, the transformer's power needs to be much higher (e.g. +40%) than the drive's in order to avoid increased harmonics (or even other problems)? If you know any official standard, paper or...

Ok but what difference makes a change in skin depth so that lower skin depths are better for heating?

Hi. I'm trying to understand why smaller skin depths are better for induction heating. Skin effect means that the highest the frequency is, the thinest the skin depth is (or the depth is simply smaller because of the material). That means the section of the workpiece with electric current in...

Heat capacity for the conductor (copper) is 0.385. I would like to take it into account, but how?

Hi. Practical situation. If I have 0.25W of constant Joule loss around a small piece of copper electric conductor, then I would like to find out how much time until a small piece of "Something" (let's say 100mg at 1 kJ/kg*K) around the conductor heats up to 200°C. From my calculations...