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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.
To study the transient electromagnetic forces acting on the stator end-windings of large turbogenerators under different operating conditions, a numerical model and method coupling three-dimensional (3D) finite element and lumped circuit equation are proposed. The proposed model and method are employed to study extensively the electromagnetic forces acting on the stator end-windings of a 600 MW turbogenerator.
As an emerging technology of wireless power transfer, an electromagnetic resonant coupling technique, also known as witricity, has been widely discussed. In this paper, a prototype with square planar spiral structure based on witricity is proposed. To compute the resonant frequency, an equivalent circuit model is presented. The inductance is calculated based on Wheeler formula. The accuracy of the...
A simple and convenient method to deal with floating conductors in electrostatic field when using finite element method (FEM) is presented. A method to extract capacitance matrix that includes the effect of floating conductors inside the solution domain is also put forward. The merits are that the computing time can be reduced; and users only need to set up the capacitance extraction on the ports...
A new displacement profile control strategy based on pulse-width-modulation (PWM) for improving the dynamic characteristics and reducing the contact bounce of permanent magnet (PM) contactor during the making process is reported. Sensorless method of real time displacement signal detection is realized using magnetic circuit model (MCM) and electric circuit model (ECM). Finite element method (FEM)...
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