Re: Need a variable-speed 2hp or greater AC motor for serious gap drive

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Crow Leader by way of Terry Fritz <teslalist-at-qwest-dot-net>" <tesla-at-lists.symmetric-dot-net>

 > Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>
 >
 > Hi Ken,
 >
 > Assuming a constant acceleration.

Is the acceleration constant in these motors and drives, or is this assumed?

KEN


 > V(r/s) = A(r/ss) x T
 >
 > d(revolutions) = 1/2 x A x T^2 = 1
 >
 > 5000/60 = A x T = 83.333     A = 83.333 / T
 >
 > 2 = A x T^2
 >
 > 2 = 83.3333 / T x T^2  = 83.3333 T
 >
 > T = 2 / 83.333 = 0.024 seconds
 >
 > A = 3472 revolutions / secound^2
 >
 > What is scarry, is that there was a big real of tape on the motor shaft
 > too!!  Explosions of the real and armature (air core) windings were
 > common...  This is why old tap reels had that big center hub...  Those old
 > time tape drives packed one heck of a lot of power into turning those real
 > super fast and hard!!  They may make a cool servo gap motor if one could
 > control the beasts...
 >
 > Cheers,
 >
 >          Terry
 >
 >
 >
 >
 > At 04:36 PM 6/1/2003 -0500, you wrote:
 > > > Original poster: "Scott Hanson by way of Terry Fritz
 > ><teslalist-at-qwest-dot-net>" <huil888-at-surfside-dot-net>
 > >
 > >[cut]
 > >
 > > > Also, there are large number of high-performance, ironless-core DC
servo
 > > > motors (Servo Disk type) on the surplus market now (ex-computer tape
drive
 > > > or large disk drive) that can accelerate from a dead stop to over
5,000
 > >RPM
 > > > in less than 1 revolution. This type of acceleration can destroy
 > >couplings,
 > >
 > >How long does this first revolution take?
 > >
 > >KEN
 >
 >
 >