On 11/01/11 16:57, ibles_world wrote:
>
> I also was on another site and it looked as if multiple motors could be setup in tandem with one another, This looked like a valuable option, I could mount 2 or more smaller drive motors with clutches to a single shaft,
You don't need the complication of clutches to disengage motors. You
just leave them all connected and run them in parallel at lower power in
each motor.
Motors are often ganged to get extra power.
Even if it became necessary to cut the power to one motor (say due to
an electrical fault) unlike an ICE there isn't much mechanical
resistance in leaving it in line and spinning it dead. (unless it's
shorted out and acting like a generator with a shorted output, but that
would be unusual.) Having a motor mechanically jam would be very rare.
Your clutch arrangement would be more likely to fail.
Electric motors also have very large operating speed that produce full
torque. A variable gearbox isn't generally needed. Forced cooling might
be needed if high torque at low speed is needed as the motors may not be
spinning fast enough to self-ventilate. Rail applications all have fixed
gear ratios and look at the loads railway locomotives drag.
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