Friday, June 29th, 2012 08:39 am GMT -6 Friday, June 29th, 2012 08:39 am GMT -6Friday, June 29th, 2012 08:39 am GMT -6
What is the motor voltage constant? Why is it important?
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Tony Obermeit liked this on Facebook.
Another explanation is as follows…
The motor “kv” rating x the voltage = the synchronous speed of the motor. At this speed, the motor has no torque/power output. When a resistance is applied – i.e. fitting a propeller, the motor starts to “slip” (go slower) – the slip generates torque/power to turn the prop which converts the rotary motion to thrust that we need for our planes. The brushless motors we use are actually AC (Alternating Current) motors. In larger industrial AC motors the amount of slip is typically 3-4%. For the small, relatively inefficient motors we use, the skip is at about double – i.e. 6-8%
That is an interesting alternative explanation. Thanks.