gearbox calculator

[Ether]

Originally Posted by apalrd

For example, say we have a motor (Motor A) which produces 4 units of torque at 5 units speed. Another motor (Motor B) produces 1 unit of torque at 10 units speed. We gear motor B 2:1 relative to motor A such that they are spinning at the same speed when mixed, and the torque output at the mixed point will force motor A to produce 2x the power and torque of motor B, while consuming 2x the current.

That last part -- "while consuming 2x the current" -- is generally not true for different motors.

Generally speaking, if you gear Motor B to produce half as much mechanical power as Motor A at some operating point, it will not be drawing half as much current at that operating point.

Likewise, if you gear Motor B to draw half as much current at some operating point, it will not be producing half as much mechanical power at that operating point.