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Why is there no torque in electric motors when the Iq current is zero and Id current is not zero?
Random vector position of stator current ( Id + Iq = Is ):
Now I draw the stator current/flux vector as shown below where “Iq = 0” and “Id ≠ 0”:
From lecture I’ve learned that the south pole of the ...
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Why are Halbach Arrays useful in PM motors?
I understand how Halbach arrays strengthen the magnetic field on one side of the array. I also know that, in a permanent magnet (PM) motor, there is already a limit on the air gap flux you can design ...
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How to apply Ampere's law with the integration path crossing a permanent magnet?
I read several books on permanent magnet synchronous machines (PMSM), and they tend to describe the relationship between H and B as \$B_{mag}=\mu_0\mu_{r,mag}H_{mag}+B_{rem}\$.
Then when they apply ...
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