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This paper proposes a novel square 9-coil (3×3) matrix system for induction cooking applications in order to improve the heating performance. By means of finite element method (FEM) analysis, three different exciting modes for the proposed system are thoroughly investigated. The magnetic field and eddy currents distribution are studied for each case. Furthermore, thermal field computation is conducted...
This paper investigates the thermal impacts of electromagnetic proximity effects among the coils of domestic induction heating system (DIHS) with distributed planar spiral multicoils. A combined coordinates system is developed in the computation, consisting of a master Cartesian coordinate system and multiple slave cylindrical coordinate systems. The proposed computing method is implemented with different...
A new induction wok station based on the induction heating principle has been design, prototyped and tested. The impedance is important for the resonant circuit design and its impedance is computed accurately to different induction wok station. A one-dimensional field calculation method has been developed that make the computation simple and is able to predict the impedance of the work station.
This paper investigates an analytical solution for describing the diffusion of the eddy currents and the impact of electromagnetic proximity effects among the coils in the domestic induction heating system (IHS) with distributed planar spiral multi-coils. The comparison of the proposed analytical solution and the numerical computation results indicates that the presented method can be applied expediently...
A 0.18 mum CMOS 5 GHz quadrature voltage-controlled oscillator (QVCO) is demonstrated by using trifilar transformer coupling. The trifilar transformers composed of one primary coil and two secondary coils are used to separate the gate and drain bias for output voltage swing optimisation and also replace a conventional transistor-coupling method for quadrature output generation simultaneously. As a...
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