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Inertia SI Values

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Inertia SI Values

‎08-15-2018 01:55 AM
1,412 Views
vegardlovvig
Contributor I

The inertia values are measured through Kinetis Motor Suite and given in unit: [A/(rpm/s)]. How do I convert these values to SI units? I want to calculate the rotational energy.

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‎08-15-2018 05:41 PM
1,243 Views
linestream-adam
Senior Contributor I

Vegard,

In order to convert from A/(rpm/s) into SI you need to convert the electrical power (A) into mechanical power [N] using the torque equation:

Torque = 3/2 * Pp * Flux * Current

You also need to convert from rpm/s into elec rad / sec.

This can be slightly tricky and it is important that your units are correctly aligned.

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