Quote:
Originally Posted by outlaw
Patrick,
you are the "Pro" here
Let me kindly ask you, why you suspect this ?
The motor we were talking about is a Tenshock 2240
22mm Rotor diameter 40mm long
I have a 5T = 3100kv
drkdgglr does have the 2240 as well, just 10T = 1560KV
The theard starter is talking about the 2220/6
Same typ of motor, just an 20mm long rotor.
Don't get me wrong ! I love your products and they are always first choice.
Can't wait to get a Mamba XL in my hands;-) to fill up my Castle collection
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Generally, when designing a motor, the motor designer tries to maximize torque per amp/turn. The more torque the motor makes per turn, the more copper can be put into the motor per turn.
We are testing a Castle version of a 2622/1Y (28mm can outside diameter, 48mm can length) motor right now -- it's four pole, and 4200Kv with just 1 turn.
It's a 26mm diameter stator, with a 22mm length.
A 1 turn motor crams a TON of copper into the motor per turn -- yielding low resistance and giving high efficiency.
Lots of turns means less space for copper (per turn), and much higher copper losses in the motor (due to high resistance.)
Also, high pole count and high RPM usually don't work well together. Higher commutation speeds means higher iron losses.
The combination of high pole counts, and high turn count, just doesn't seem to make good engineering sense.