Why is the inertial block in simscape required for permanent magnet motors ?

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jefazo jefazo 2020-4-4

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https://ww2.mathworks.cn/matlabcentral/answers/515414-why-is-the-inertial-block-in-simscape-required-for-permanent-magnet-motors

关闭： MATLAB Answer Bot 2021-8-20

Hi everyone,

I am fairly nnew to MATLAB and SIMULINK. I am trying to model Field Oriented Control of PMS motor. In MATLAB Tech Talk tutorials they say the inertia reference block is required. I have visited the documention for the block but I am still not sure what it does. Is it meant to simulate just inertial effects (which I guess are a loss) of a motor ? But the page also says that the torque is positive if inertia is accelerated in the positive direction, how do you know which direction is positive ? Is it anti-clockwise ? Thank you for your help in advance.