karel wrote:
"RST Engineering" wrote in message
...


Hey, for all you folks talking about small transformers and signal diodes
to do the job, note the OP said he needed 75 watts. With normal
conversion efficiencies, this is about 4 or 5 AMPS from a 24 volt supply.
We ain't in small signal land any more, Toto.


A transformer big enough to transfer 75 W would weigh in at 2-3 lbs,
at a guess? Even them new-fangled toroidal thingies?
And then one apiece for each of them 3 phases?
Better use one 3-phase transformer, if the power requirement is for real.


Now, to the OP: What makes you think you need that much wattage to spin
up a small gyro motor?


Yep that's what I wondered, too.
But there's people round here more competent than myself
so I just waited a bit and sure enough the question come up!

Besides, I always understood these gyroscopes
do not take any real power
seeing they do not actually operate anything.
Just a gentle push to overcome friction, no?

Steady state, you are correct, however, the power required to spin up
the gyro can be significant for a few seconds at least.

Matt