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Old 09-26-2022 | 10:54 PM
  #49430  
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gigaplex
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Originally Posted by DesertRat
Those are the accurate 0 RPM short circuit current draw in watts for each motor and battery voltage in question, not motor theoretical power output. You are either reading it wrong or pretending to not understand to make an incredulity straw man argument.
No they're not. The motor is a large inductor as well as a resistive load, and inductors resist spikes in current. Before the motor would get anywhere remotely close to drawing that much current, it has already rotated and will de-energise that phase and start energising the next phase. And even if it did, that's not representative of the power output of the motor. At 0 RPM, there is zero mechanical power output. Peak power output is at approximately half the no-load peak RPM.

I repeat. You cannot treat the motor as a purely resistive load. If you're going to use ohms law as a crude way to calculate the theoretical electrical load, you need to use the motors effective impedance (Z), not the stator resistance (R).

Last edited by gigaplex; 09-26-2022 at 11:26 PM.
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