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Based on the idea of field-circuit combination, the 3D FEM and circuit analytic method are applied to analyze and improve the potential distribution of the 1000-kV metal oxide arrester (MOA). The 3D FEM is used to obtain the 1000-kV MOA's potential distribution and stray capacitance parameters to build the equivalent circuit of the MOA. Based on the equivalent circuit, the method to improve the potential...
This paper deals with skew and overhang effects of permanent magnet in PMLSM. The detent force and thrust characteristics considering skew and overhang effects of permanent magnet are analyzed by 3D FEM and the results are compared to experimental values
This paper proposes a dynamic analysis method of a two-dimensional linear oscillatory actuator (LOA). In this method, magnetic field equation is coupled with motion equations of both rotation and linear motion of a mover employing 3-D finite element method (FEM). The usefulness of the method is verified by confirming the complex resonant oscillation of the mover when it is operated at different frequencies...
This paper presents a dynamic response analysis method of an electromagnetic impact drive mechanism by 3-D finite element method (FEM). The electromagnetic impact (EMI) torque is computed from the eddy current when the ring magnet is suddenly inserted into the gap of high magnetic flux
This paper analyzed the characteristics of the claw pole PM step motor by using 3D FEM. As the magnetization occurs along the z-axis of the motor, it is necessary to apply 3D FEM for analysis of the claw pole PM step motor. Considering the computation time, however, the number of the analysis model is minimized by using the "design of experiments (DOE)". By using the "DOE", efficient...
3D FEM shell elements are used to determine the sensor impedance variation due to ferromagnetic anisotropic metal fibre composites (FAMFC). The homogenization of the FAMFC is realized by the inverse method. The impedance variation gives the information about the lift-off and/or the FAMFC integrity
Based on finite element method (FEM) of ID conductor element coupled with 3D soil element, we take into account the frequency dependent characteristic of the discretized elements to analyze the grounding performance of the substation grounding grids. Compared with A-V formulation of 3D FEM, the proposed method can greatly save the CPU time and the frequency can be considered during FEM modeling. In...
In this paper a computationally-efficient model of a broadband microwave rectenna is presented. A rectenna includes a rectifying circuit and an antenna. In this work the combination of a 3D edge finite element method with a Pade rational approximation procedure allows a fast characterization of the antenna over the wide frequency band. Then an equivalent circuit of the whole device including distributed...
This paper deals with a noise and vibration of brushless DC (BLDC) motors due to the asymmetrical overhang of permanent magnet. The asymmetrical overhang of permanent magnet is generating z-axis thrust which is lead to eccentric force and vibration of BLDC motor. The z-axis thrust considering asymmetrical overhang effect of permanent magnet is analyzed by using 3-D FEM and the result is compared to...
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