SplinterOz
1 kW
Hillhater said:liveforphysics said:Hillhater- Its not using a lot of power to be ripping up the asphalt right from a start.
Its likely getting 20:1 or 30:1 leverage on its phase current to battery current used as its starting out. This is because its only loss is the same loss its having when its making this amount of torque in its peak efficiency range, only now it has even less losses, cause its not having all the additional core losses of turning while its making this torque.
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In simple terms , are you saying the Tesla is making maximum torque from standstill, yet not pulling max amps from its battery ??
Yes that is what he is saying and many of us not only understand why but also have measured it.
Note that the speed of the motor is directly related to the Volts applied (Kv). So if the motor is slow then the volts across the motor must be low. Now unless the controller is very inefficient (which most are not) then the KW (electrical) put into the controller are the KW put to the motor (loose about 10% for efficiency).
Doing the maths....
Batt Voltage * Batt Amps = Motor Voltage * Motor Amps (* controller efficiency)
Now if the Motor Volts are lower (slow speed) then the Battery Volts then the Motor amps must be higher by the same amount.
Simple really.