What are the disadvantages of dielectric heating?
Disadvantages of Dielectric Heating :
- It is not possible to increase the supply voltage beyond the breakdown of the dielectric material.
- it is not possible to increase the frequency of ac source beyond the resonant frequency of the electrodes and the capacitor formed by the electrodes and job.
What are the dielectric heating principle and uses?
Dielectric heating occurs when high-frequency electromagnetic radiation stimulates the oscillation of dipolar molecules (e.g., water molecules) in the surrounding medium at a very high speed, thereby converting electromagnetic energy into kinetic energy.
What do you need for an induction heater circuit?
The two bare basic things required for building any induction cookware are: 1) A bifilar coil. I have already discussed a few induction heater circuits in this website, you can read them below: All the above links have the above two things in common, that is they have a work coil and a driver oscillator stage.
How does Resonance Affect an induction heater circuit?
At resonance frequency we can expect the amplitude of the voltage oscillating across the LC circuit to be at the maximum level, resulting in the most efficient induction. Therefore we can imply that, to implement a perfect resonance within an LC network for an induction heater design we need to ensure the following crucial parameters:
Which is the most efficient induction heater circuit?
The first design explained below is a highly efficient ZVS induction concept based on the popular Mazilli driver theory. It uses a single work coil and a two current limiter coils.
How to calculate the Rt of an induction heater?
This may be done by some trial and error through practical measurements, or through the following formula: The following formula can be used for calculating the values of Rt/Ct: f = 1/1.453 x Rt x Ct where Rt is in Ohms and Ct in Farads. The induction heater concept discussed in this post uses a series resonant circuit.