Application Pages

Bearing friction damping in a stepper motor

This stepper motor consists of a stator with eccentric pole faces and a rotor made of samarium cobalt permanent magnet that is magnetized in a fixed direction. The rotor rotates in steps of 180 degrees. Each step in the rotor is due to a short pulse from a current source

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Brushed Motors Design and Analysis

The MotorSolve DCM module provides finite element based analysis for the design of DC brushed motors. The versatility of the DCM module is in its ability to create motors from templates and its advanced electromgnetic analysis capability. The analysis can be used to get standard DC motor characteristics or to get more advanced quantities such as waveforms, harmonic analysis of the waveforms, time-averaged quantities, Field distributions and many more.

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Brushless Motor Design with MotorSolve

MotorSolve offers a new and enhanced user experience, a powerful geometry engine and windings editor, a simple results-driven post-processor and the capability to manage, compare and analyze multiple designs and generate reports with any combination of the dozens of graphs, values, plots and data that are available.

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Calculating the steady-state ohmic and core losses in a BLDC Motor with temperature effects

The goal of the analysis is to predict the steady-state temperature of the motor and verify if the rotor magnets will demagnetize. A 3d transient thermal analysis coupled to a 3d transient with motion magnetic analysis is used to calculate the steady-state temperature distribution after a few hours of operation; the simulation will determine the change in performance due to increased winding resistance and degraded magnetic properties.

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Cogging torque in a skewed brushless DC motor

The predicted cogging torque in a brushless DC motor is compared between two different stator geometries: a straight stator and a skewed stator. MagNet makes it easy to set up multiple problems for solution at different rotor angles. And MagNet’s Static 3D solver reports the magnetic forces and torques experienced by each body in the model, so it is easy to create a torque-angle curve.

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Coil Size Optimization - Induction Heating

In the multiple-coil configuration shown in this figure, the work piece is surrounded by six coils (coils are shown partially so that the workpiece can be seen). The objective of this optimization is to find the inner radii of the coils in order to obtain a uniform temperature in the upper portion of the workpiece.

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Computing the Lumped Parameters of Induction Machine Models

MotorSolve IM performs no-load saturation, locked-rotor and impedance test simulations to evaluate the circuit parameters. The tests are based on FEA solves and include accurate estimation of core losses. In this analysis mode, computation of the lumped parameters allows the user to specify the leakage ratios between the rotor and stator. This example demonstrates the equivalent circuit based analysis of a 17 bar - 24 slot machine.

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Core Loss and Efficiency Calculations

Infolytica's products have adopted an advanced core loss model. This can be used to accurately determine the efficiency of a permanent magnet machine, or when coupled with ThermNet, provide a better simulation of temperature changes in a permanent magnet voice coil.

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