Building a trainer

[rsd53]

I'd like to weigh in on this.

Originally Posted by Tinbender

Cammo:
From what I am understanding:
A 23 turn motor will run say 25 miles per hour and have no pulling power
A 55 turn motor will run say 15 miles per hour but have all kinds of pulling power
A 45 turn motor is a fair inbetwwen motor to have a little of each but not a lot of either.

The more turns you have, the larger magnetic field will developed. The other part of the equation comes from the number of poles the motor has. The more poles a motor has, the slower the motor runs. There's a direct relationship between number of poles and torque, for a given field strength.

Let's say a motor is rated at 2000 rpm, has 4 poles and has a torque value of x. If the same motor was wound with 8 poles, it would have a rpm of 1000 and a torque value of 2x. In either case, the same amount of power is consumed.