Re: Cap at the Gecko, motor heating, fuse protection??

So what are your personal thoughts on running a motor over it's
rated voltage? Does is not matter then because the Gecko limits
the current?

Thanks,
Scott

> Well, that's the problem! Power levels well within the continuous

ratings

> of the motor WILL destroy it if the power is not getting out of the

motor.

>
> In other words, say the motor's continuous torque rating allows it to
> produce
> 250 Oz-In. You can feed the motor a current that produces that

torque all

> day without harm. You can figure out what POWER level that is, by
> multiplying
> the current by the voltage drop due to the winding resistance. But,
> when the motor
> is spinning at a high speed, the POWER into the motor will be far

greater!

> The continuous current should not be exceeded for more than a second

or so,

> ever. So, that is the real limit - current or torque, NOT POWER!
>
> If you try to watch the iput power, you need to also watch the

OUTPUT power,

> to know how much heat is being generated.
>
> But, an RMS sensor based on the current will produce a pretty accurate
> picture
> of the heating that is occurring in the motor. Motor heating is
> proportional to
> current squared, not power into the motor.
>
> Jon