Dielectric Heating

[erkanyigiter]

Hi all,

I am looking for information about dilectric heating. Any information, circuit schematic, link.. etc. would be very appreciated.

Thanks..

[Chris Smith]

Dielectric or inductive heating?

Inductive heating through magnetics?

[erkanyigiter]

Dielectric heating.
Heating of non-conductive materials..

[Chris Smith]

Actually instant on water heaters like I was thinking, use a magnetic field to heat the water.

Similar, but probably not what your thinking?

This is more of what you want?

http://www.cpii.com/bmd/cpinew/Tutorial ... ating.html

Scientifically speaking, there are several ways that a dielectric material absorbs energy from the oscillating electric field. The two most important mechanisms are molecular rotation and electrical conduction. Some dielectric materials' ability to conduct electricity (moderate resistivity) is good enough that an amount of RF or microwave current will flow and heat the material. This mechanism is especially important at lower frequencies and with semiconducting materials.
The other mechanism, molecular rotation, occurs in materials with polar molecules. A material capable of being heated with RF or microwave energy is said to be polar, referring to the fact that its molecules have both positive and negative opposing charges (dipolar). In practical application an electric field is applied to the material causing its molecules to rotate and line up with their corresponding fields. RF and microwave energy fields alternate much like an electric motor, between positive and negative, at their specified frequency of operation thus causing the molecules of the material to rotate. The friction generated by the molecules rubbing together as they rotate generates heat. This method of generating heat within a material is termed dipole rotation and can be used to heat solids, liquids, or gases.

[dacflyer]

i found out that melmac dinner plates do not do good in microwave ovens,,,they become toast after a few min and burn...or even start to arc and burn. and no there was no metal or foil design on them,, :p