Application Pages

An Electrostatic Simulation of a Surge Arrester

Based on a paper from the International Electrotechnical Commission: this surge arrester has 2 grading rings. It is formed of 2 electrodes: one at the top formed by a conducting metal rod and 2 conducting metal grading rings, and the other at the bottom forming the pedestal of the surge arrester. The ElecNet simulation presented here was compared to results provided by the IEC.

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Analysis of a Boost Converter Inductor

MagNet's suitability is demonstrated by using it to analyze the inductor of a 27 kW boost converter that steps-up an electric vehicle's battery voltage from 200 V to 200 - 650 V range.

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Analysis of Induction Motor Design and Simulation Problems

MotorSolve IM offers four types of analysis options; Equivalent circuit based analysis, AC analysis, PWM and Motion analysis. At different degrees of approximation, complexity and utility, they offer solutions to a wide variety of induction motor design and simulation problems. In this application page, some simple examples of the utility of these methods are presented.

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Analyzing a loudspeaker design

A basic analysis of a loudspeaker design consists of analyzing the magnetostatic properties of a 2D axisymmetric design. In certain cases, 2D analysis is insufficient because of symmetry breaking features, for example, segmented magnets. In this case, a 3D model is needed. The same analyses can be performed in 3D as with the 2D analysis package.

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Analyzing a loudspeaker's voice coil response to a signal

In this example, we have analyzed the voice coil response to a signal by using MagNet's 2D Transient with motion solver. The solver includes coupling to the mechanical equations of motion, so that the movement of a component of a device (for example, the movement of the voice coil) is accurately simulated. The mechanical effects can include friction, inertia, mass, springs, gravitation, etc

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Analyzing the internal mechanics of a watch stepper motor

Presented here is the internal mechanics of a watch employing a stepper motor. The watch is simulated using Infolytica’s Transient 3D with Motion solver. The device consists of a steel frame (12.1 mm across) with a stranded coil wrapped around it. The rotor of the stepper motor is made entirely of a neodymium permanent magnet with a fixed direction of magnetization. Instead of modeling all of the underlying gears attached to the rotor, a moment of inertia is applied to correctly simulate the motion.

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Asymmetrical Conductor with a Hole (T.E.A.M. Problem 7)

This problem consists of a thick aluminum plate with a square hole placed to the side. A current driven coil is placed unsymmetrically over the aluminum plate. A sinusoidal current is used to drive the coil at two different frequencies.

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Axial Flux Disk Induction Machine

MagNet 3D Transient with Motion solver was used to model both a run-up to synchronous speed and also to create a torque-speed curve. This particular machine provided the opportunity to compare the MagNet results against measurements made on the real device, and to also show the accuracy and value of simulation with MagNet. This type of machine is often specified when rapid changes in operating speed are required or the short axial length of the machine is crucial. The simulation results and comparison to measured date are presented.

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