SPEEDLink Assistant - Examples

The SPEEDLink Assistant is Infolytica's easy-to-use wizard that imports data from a SPEED motor program file and then uses this data to build and solve a corresponding MagNet model. SPEEDLink Assistant reads and then translates the geometric, material, coils, and boundary condition data from the SPEED file.

SPEEDLink Assistant provides many benefits to clients using both MagNet and SPEED software. Having rapidly built a SPEED motor model, the duplication of effort in building a corresponding MagNet model is avoided. The materials used in the SPEED model are imported as-is, and may be copied to permanent new material names, or replaced by corresponding materials already in the library. Automatic mesh controls are included to ensure that the airgap and curved slot shapes are accurately represented and that the results are also accurate. These mesh controls may be readily overridden by the user, if preferred. An accompanying log file is produced, ensuring that all the information covering the conversion is available for review later.

Examples

Please scroll down to view various examples of the MagNet models that have been created using SPEEDLink Assistant. With one of the examples, we go a step further and do a cogging torque calculation.

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AC Motors --

quarter models

automatically assigned odd-periodic boundary conditions

materials, BH curves, and conductivity are automatically created

coils are automatically created

when permanent magnets are present, their magnetization directions are automatically assigned

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Brushless DC Motors --

quarter and half models

automatically assigned even-periodic boundary conditions

materials, BH curves, and conductivity are automatically created

coils are automatically created

permanent magnet magnetization directions are automatically assigned

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Line-start Synchronous Motors --

quarter and half models

automatically assigned odd-periodic boundary conditions

materials, BH curves, and conductivity are automatically created

coils are automatically created

permanent magnet magnetization directions are automatically assigned

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Switched Reluctance Motor

half model

automatically assigned odd-periodic boundary conditions

materials, BH curves, and conductivity are automatically created

coils are automatically created

Cogging Torque Calculation example

With its novel integral smoothing techniques, MagNet is well suited to perform cogging torque calculations in electrical machines. SPEEDLink Assistant exploits these features automatically, to allow rapid accurate cogging torque calculations in MagNet, for electrical machine models built using SPEED software. Indeed, Infolytica has now taken the process a stage further. Having used MagNet for accurate calculation of cogging torque, the design-improvement package, OptiNet, may be used to predict the geometric modification required to actually reduce the cogging torque. This procedure is illustrated in the Gallery page, Brushless Motor: Minimizing Cogging Torque.

STEPS that were taken to set up the “cogging torque calculation” example:

Identified the SPEED file (i.e. input file) and the MagNet device file (i.e. output file)

Set the Stack Length and the Stacking Factor

Selected the “Parameterize Rotor” checkbox, and then set the Rotor Angles from 0 degrees (Start Angle) to 30 degrees (End Angle) with increments of one degree (Number of Positions is set to 31)

Clicked the “Create Model” button

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Here is the parameterized model created with SPEEDLink Assistant, rotated to show its three dimensions and the boundary conditions. To the left of the model, is the Object page, which shows :

components

boundary conditions

coils

Note Every one of the items listed above was created automatically by SPEEDLink Assistant.

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By choosing the 2D magnetostatic solver in MagNet, the device is solved at 31 different rotor positions (i.e. 0-30 degrees in increments of 1 degree) and the fields, as well as the cogging torque, are all available at the end of the solver run. The illustration to the right shows the updated view of Problem 31 where the rotor angle is 30 degrees.

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This graph shows the Cogging Torque of the device solved in MagNet.