Affiliations: [a] College of Electrical Engineering and New Energy,
China Three Gorges University, Hubei, China | [b] Operating Department of Guandi Hydropower Station,
Yalong River Hydropower Development Company, LTD., Sichuan, China
Correspondence:
[*]
Corresponding author: Li Qiu, College of Electrical Engineering
and New Energy, China Three Gorges University, Hubei 443002, China. Tel.: +86
717 6392170; Fax: +86 717 6394492; E-mail: [email protected]
Abstract: The relative permeability and electrical conductivity of the pan
material, both of which vary with temperature, play an important role in
thermal power of induction cooker system. A series of finite element models,
including a variable relative permeability electromagnetic model, a variable
electrical conductivity electromagnetic model, and an electromagnetic and
thermal coupling model, have been built by ANSYS software to analyze the
variation of the thermal power with relative permeability and electrical
conductivity in this paper. It is indicated that thermal power increases with
the relative permeability increasing, but its growth rate decreases. When the
electrical conductivity increases, thermal power increases, reaches a peak
value, and then decreases. Considering the variation of the relative
permeability and electrical conductivity with pan temperature, the simulation
results show that thermal power decreases a lot when the temperature of the
material exceeds a definite value due to the low relative permeability in this
case. Finally, the induction heating mechanism is clearly understood and the
simulation results provide useful guidance for induction cooker design.
Keywords: Material property, thermal power, induction cooker system, finite element method
