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Originally Posted by zeropointbug
I never made my point clear enough... it sounded like you were talking about Kv. determining torque constant, when Kv. is not what determines torque constant. That's all I meant.
Also, just because a motor pulls more amps, does not mean it has more torque either. There are a lot of factors your not taking into account.
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Actually that is my point. kv DOES determine kt. Kt is the torque per amp pulled, not just the torque. If two motors each pull x amps on y volts they will both have the same power if they have the same efficiency. That means kt multiplied by kv is a constant, ONE number for all brushless motors, because ultimately power = rpm x torque. So yes, for every kv value there is a kt value to get that number. The only thing that changes btw when a motor is inefficient is rpm. A motor that is 50% efficient at x amps and y volts will have 1/2 rpm as it does unloaded. Torque is uneffected by efficiency. If you disagree, I'd like to know your reasoning before you just tell me im wrong.