Will two smaller motors connected together perform like one larger motor?

Question

Let's say I have two 350W permanent magnet 24V DC motors. They are both, for argument sake, identical and put out 1.2 Nm of torque each at some rated load. They are both powered by a pulse width modulator controller that is capable of delivering more than 700W. If I were to connect the two together via a chain and connect that to the rated load, would they produce (ideally) double the torque?

I happened across 10 of these 350W motors and would like to use (at least one of) them to build a go kart. If 350W doesn't suit my need for speed, instead of buying a larger motor, I would like to simply use a few more smaller ones that I already have. I understand they will use twice the power, so I'll need extra batteries, but that's not a problem as I would need those extra batteries for a larger motor anyways....thanks for your feedback and advice!!

Answer 1

Same speed, more torque ideally 2x.
So it will handle a larger load.
In real world applications, this is called load sharing.

Answer 2

It would be easier just to connect one motor to each drive-wheel independantly (even all 4 wheels if you have space).

For what you describe (identical motors, controlled to identical conditions, direct mechanical connection), yes you will double your power (not necessarily your torque -- that depends on the power curve and where you operate the motor -- which changes when you share the load among 2 motors).

If you really want to connect 2 (or more) motors together for more power, you need to have some clutch/transmission mechanism that allows for multiple inputs and one output like multi-engine tractor-pull tractors and drag racers use.

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