playabstation (January 1, 1970 at 8:59 am)

A question out of curiosity, how quick can an electric motor change directions? For example, if it was spinning at 10,000 RPM, how long till it could reverse and reach 10,000 RPM again. Also, would it be able to reverse and reach 10,000 RPM quicker if a second motor started each time the direction was changed? In other words, when spinning forward, only 'motor A' is on, when trying to reverse 'motor A' switches off as soon as 'motor B' starts. I want to know because I am starting a project.

horlacsd (January 1, 1970 at 8:59 am)

Hey just being anal here... around 1:20, when explaining the force that the wire experiences (F= q*(vXB)).Since positive charge, and given the permanent magnetic field lines (North -> South), the top of the loop should experience a force OUT of the screen, and the bottom should experience a force INTO the screen. Awesome vid though, umma build one asap!

pookyking2 (January 1, 1970 at 8:59 am)

we doin this in 9th grade for some reason

MileyandMandyfan3 (January 1, 1970 at 8:59 am)

we did this in school, i think in 6th grade...

antisp13 (January 1, 1970 at 8:59 am)

too fast man

horizonflyer9 (January 1, 1970 at 8:59 am)

what wire gauge (AWG) should i use?

omgwhy93 (January 1, 1970 at 8:59 am)

uuumm is the battery supot to get hot ahhh??? this is my firt time doing this and it ant working

wolvesXD (January 1, 1970 at 8:59 am)

why so fast?

dantheman11995 (January 1, 1970 at 8:59 am)

why so fast?and what to be used for?

geeleegoat (January 1, 1970 at 8:59 am)

I guess the inertia of the coil carries it through, although I suspect the efficiency is drastically reduced. A more efficient configuration using DC without commutation would be the unipolar motor. You've probably seen lots on YouTube. Anyway, thanks for the input.Cheers.