Application Pages

Designing Induction Motors

MotorSolve IM is a comprehensive tool within which modeling, design iteration and design validation can be carried out for induction machines. To facilitate this, user friendly and powerful modeling features as well as multiple types of analysis options of varying degrees of approximation and complexity have been implemented. These include equivalent circuit based analysis, AC analysis, PWM and dynamical motion simulations. Provided below is a summary of MotorSolve IMs’ modeling and analysis capabilities.

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Detecting a Crack - A Problem in N.D.T. (T.E.A.M. Problem 8)

In this example, MagNet simulates an eddy current NDT problem: detecing the crack in a stainless steel block with a solenoid probe moving across its surface. The objective is to detect a crack by measuring the difference of magnetic fluxes through two solenoids.

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Detecting Flaws and Nondestructive Evaluation (T.E.A.M. Problem 15)

This example demonstrates how MagNet can be used for non-destructive testing/evaluation and sensor problems. A circular coil moves along an aluminum plate that contains a slot. The goal of is to detect the slot by calculating the resistance and inductance of the driving coil at various positions.

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Eddy Current NDT and Deep Flaws (T.E.A.M. Problem 27)

A coil is stationary over a sheet of aluminum that contains a screw hole. Inside of the screw hole, a flaw is to be detected by two Hall effect sensors. The sensors are used to measure the horizontal differential flux density .

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Eddy Current NDT and Deep Flaws (T.E.A.M. Problem 27)

In this example, a sheet of aluminum contains a screw hole with a flaw inside. The flaw is to be detected using the eddy current method. A coil is stationary above the screw hole, which generates eddy currents inside of the aluminum. Two diametrically opposed Hall effect sensors measure the horizontal differential flux density at the surface of the screw hole.

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Electric Field Due to a Pulsed Voltage Source

The 3D transient electric field simulation of a simple copper strip on a dielectric layer over a ground plane is described in this example. The analysis is in 3D since the copper strip is short and there is fringing of the electric field at the end of the strip.

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Electric Field Transient Analysis of a Conductive Shield

Transient phenomena may be present in many devices containing components that are kept at a fixed voltage. Before steady state is reached, it may be necessary to model and understand the nature of the transients. Using ElecNet, it is possible to model and capture this phenomenon. Here, using a three dimensional, axis-symmetric model of a conductive shield, the transient aspect of the device is captured.

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Ensuring Electric Machine Efficiency

An IPM (interior permanent magnet) machine is optimized to minimize the torque ripple while maintaining a minimum running torque, ensuring that the back EMF does not exceed the supply voltage, with the additional constraints that the efficiency be at least 80% at both 1800 and 4000 rpm.

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