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Torque at constant speed

I was going thought example Brushless IPM motor (embedded Magnets). I have question regarding Motor performance at constant speed.

question is, why we need to define solid conductors for magnet ? why we cannot keep it as it is defined in CASE 2? How to decide solid conductor connection with existing circuit?

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Flux

v2021.0

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Alexandru-Ionel Constantin

Hi Snehai Shinde,

The solid conductors defined in the circuit for magnets are used to compute the losses in the magnets. In this case, you need to specify the electrical resistivity of the material from which magnets are made.

If you are not interested in the magnet losses you can use the definition used in CASE 2.

Best regards,

Alexandru

Letizia Ferrara

Hi Snehai Shinde,
Alexandru-Ionel has already correctly reply to a part of your question.

The circuit connections of the components respect the physics of the motor. Usually the magnets are electrically isolated from the lamination stack thanks to resins that are poured into the pockets; for this reason a mesh ("closed circuit") is created for each magnet with a high resistance component in it.
The Flux syntax then requires that the meshes are connected to each other and it needs a ground component in the all circuit.

Best regards,

Letizia