How efficient is induction heating?
The overall efficiency of induction heating is ηsupply·ηthermal·ηc ·ηsupply is typically 0.8-0.9 (per unit) and accounts for losses in cables, power factor correction capacitors and frequency conversion equipment; the thermal efficiency, ηthermal, represents thermal losses from the workpiece and is critically dependent …
Why induction heating is done at high frequencies?
Induction heater units incorporate high frequency generators for non-contact heating of metal using electromagnetic induction. This eddy current generates Joule heating, and a heat loss of the electromagnetic energy (eddy-current loss) will be caused.
Can a pulsating DC be used for induction?
OR, even if your DC were pulsing between two non-zero values. The answer is yes. Applying any changing voltage (current) to your induction coil at any frequency can and will likely result in induction heating of a conductor inside of your induction coil.
Can you use a resonating capacitor on an induction coil?
OR, even if your DC were pulsing between two non-zero values. The answer is yes. Applying any changing voltage (current) to your induction coil at any frequency can and will likely result in induction heating of a conductor inside of your induction coil. You don’t even need a resonating capacitor to achieve induction heating.
Why does an induction heating machine work the way it does?
The works because of Lenz’s law. This means that when it is introduced to a constantly changing magnetic field, the induced currents in the aluminum create an opposing field to that of the coil. This is the same thing that is happening when you drop a strong magnet down a copper pipe.
Why is induction heating good for case hardening?
The method used in the video can be repeated multiple times until the desired hardness is achieved. Induction is particularly good at case hardening. This is because of the skin effect discussed in the next step. The same high frequency skin depth that is seen in the working coil is also seen in the part being heated.