Rich,
you should not have any problems with it. Voltage rating of PM brushed motors (and other types for that matter) basically means two things:
- Insulation rating of commutator and windings - 6 and 12V are so low that there is no practical difference between them (unless you are talking about MEMS kind of motors).
- Higher voltage rating for given type of motor means higher windings resistance, which means less current is needed (at higher voltage) for the same performance.
Running the motor at higher voltage creates the danger of exceeding it's thermal envelope, which is the most common (beside of mechanical failure) way to destroy it. As long as your motor is not getting hot (bear in mind that it takes a while for heat to transfer from armature to the case of the motor), it will be fine.
Paul.
Can I use 12volts as motor Voltage input to a
> motor controller, and run 6volt motors safely,
> when the measured output voltage of the motor
> controller is 6.0 volts at the corresponding
> PWM level?
>
> Will the pulsed 12v, (which looks like 6volts on
> my meter)hurt the 6 volt motors?
>
> Rich