Does the Temperature of a Magnet Affect its Strength?

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TORQUE-VS-TEMPERATURE

Torque versus angular position for different magnet temperatures

magnetproperty vs temperature

Magnet property for different temperatures

 

 

 

 

 

 

 

Magnets are everywhere in everyday lives! Hard drives, speakers or motors use magnets. But does the temperature of a magnet affect its strength?
Let’s take as example a motor of a Prius (1200 rpm, 30 Nm)
Motor performances change as the motor temperature changes.

The magnet temperature has a great effect on the remanent flux density of magnet. At 1200 rpm, the nominal torque is around 300 Nm. We have noticed that an increase of 40° leads to a decrease of approximately 6 Nm (2%) out of 300Nm. This is why a new model of magnet depending on temperature has been introduced inside Flux software. This model allows running parametric computation in order to directly understand the impact of this dependency.
Once all the curves are displayed, it is very easy to get the average torque versus each temperature.

courbe_torque_vs_temperature

Torque average for different magnet temperatures

Torque average for different magnet temperatures

Torque average for different magnet temperatures

 

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