> Changing motors is not an easy option, especially since there will be
> complex
> mechanical changes.  What does "bridge switcher" mean?
>

That's just what I'm calling a circuit that has a transformer driven by a
half bridge or full bridge circuit. It could also be a classic "push pull"
circuit where the center of the transformer goes to plus supply and the
two ends go to a couple transistors.

> I also just mentioned a thought about vehicle power inverters on another
> email
> a minute ago.
>
> But from this and other sources, I see that it's not such an easy task, so
> what if I scale back a bit...  Rather than running multiple motors off a
> single boost converter, if I simplified it as one boost converter for each
> motor, I'd need 18V-20V at 10A-12A.  We're still up around the 200W mark,
> so
> my next thought would be to parallel 2 or more boost converters, if that's
> allowed.  I guess that may be dependent on the specific regulators.
>
> Cheers,
> -Neil.


Driving individual motors might make it a bit easier. Perhaps you could go
to a multiphase boost converter which is two or more boost converters with
the pulses interleaved. This increase the ripple frequency making the use
of smaller components possible. This could be especially appropriate if
the boost converter can also be used to control the motor. However, the
boost converter output cannot go below the input, so that's pretty
limiting. It may still be simpler to just have a big transformer based
inverter to get the higher voltage, then use PWM transistors between the
low side of the motor and ground to control the motors.

Harold


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