 #1
some bloke
 268
 89
 TL;DR Summary

I have 2 induction heaters which are exhibiting different results when heating the same product. The 2 are different, having different sized coils, and I would like to work out the strength of the induced field in each of them (with a common item being heated) to establish whether they are actually even close to one another.
These are old machines which noone really understands. This is my first step in trying to understand them better!
As the summary says:
I have 2 induction heaters which are exhibiting different results when heating the same product. The 2 are different, having different sized coils, and I would like to work out the strength of the induced field in each of them (with a common item being heated) to establish whether they are actually even close to one another.
The coil is a single coil, which is aligned perfectly flat. the item being heated is a ring shape, and in theory is a consistent distance from the coil. The coils both have a gap of circa 10mm where they enter and leave, forming the majority of a circle.
The information I am looking for is:
1: What data will I need to collect about the coils? I am assuming:
2: What formulae do I need to perform this comparison?
I have done some research but nothing seems to quite match what I am trying to establish!
Much Appreciated!
I have 2 induction heaters which are exhibiting different results when heating the same product. The 2 are different, having different sized coils, and I would like to work out the strength of the induced field in each of them (with a common item being heated) to establish whether they are actually even close to one another.
The coil is a single coil, which is aligned perfectly flat. the item being heated is a ring shape, and in theory is a consistent distance from the coil. The coils both have a gap of circa 10mm where they enter and leave, forming the majority of a circle.
The information I am looking for is:
1: What data will I need to collect about the coils? I am assuming:
 Diameter of the coil
 thickness of the coil (they have a square cross section)
 wall thickness of the coil (they are pipes filled with cooling water) to then calculate;
 Cross sectional area of the coil.
 Distance from the coil to the ring to be heated (which is inside the coil, in the same orientation; 2 concentric loops)
 Power inputted into the coil
 Frequency should be the same as this is relevant to the material to be heated, would this affect the intensity difference if both coils are the same?
2: What formulae do I need to perform this comparison?
I have done some research but nothing seems to quite match what I am trying to establish!
Much Appreciated!