Induction cooker
Joule heat power and heating efficiency of an induction cooker's pot, produced by the high-frequency magnetic field of the hob coil.
Engineering Problem
How can the heating power and efficiency of an induction cooker be found?
Answer
Build an axisymmetric AC Magnetics problem simulating the electromagnetic interaction between the induction coil and the pot.
Typical Applications
- Induction cooktops
- Induction heating
- Wireless power transfer
Simulation Problem
- Problem Type
- Axisymmetric AC Magnetics
- Geometry
- From bottom to top: coil, ceramic panel, pot and water.
- Given
- Coil outer diameter 190 mm
- Turns 54, wire diameter 3 mm
- Current I = 14 A (RMS)
- Frequency range f = 20 kHz – 100 kHz
- Pot volume 1100 ml
- Task
- Estimate the Joule heat in the pot.
- Solution
The flat spiral coil can be represented by a set of concentric circles, so the problem can be solved as an axisymmetric 2D problem (with the horizontal axis as the axis of rotation).
- Results
At 40 kHz the Joule heat in the pot is 960 W.
The dependence of Joule heat on supply frequency at constant current amplitude is also given.
