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Re: [TCML] speeding up sync motors ?

Tesla List,
I would like to hear if anyone has succeeded in driving a synchronous gap with a belt drive. I have been cobbling together such a project but found that the belt slippage negates the synchronous aspect of the design. I am looking for some cog belts that might do the trick.

Any thoughts or experiences would be welcome.
Jim Zimmerschied
  ----- Original Message ----- 
  From: S&JY<mailto:youngs@xxxxxxxxx> 
  To: 'Tesla Coil Mailing List'<mailto:tesla@xxxxxxxxxx> 
  Sent: Thursday, November 22, 2007 3:53 PM
  Subject: RE: [TCML] speeding up sync motors ?


  Chris,

  A few have reported they run their SRSGs with variable frequency drives.
  But with most electric motors, the range of RPM that can be achieved without
  losing sync or overheating the motor is limited.  You might get a 60 Hz
  motor to work reliably at 40 to 90 Hz, but not 400 Hz.

  You could experiment with a variable frequency sine wave oscillator driving
  a hefty audio amplifier (capable of several hundred watts rms) driving a
  beefy 6 volt filament transformer run backwards to step up the voltage to
  120, and drive a small motor, e.g. 1/4 or 1/3 Hp.

  But why not do as Dr. Resonance suggests and belt drive your RSG to step up
  or down the RPM by varying the pulley sizes?

  --Steve Y. 

  -----Original Message-----
  From: tesla-bounces@xxxxxxxxxx<mailto:tesla-bounces@xxxxxxxxxx> [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
  Of Chris Swinson
  Sent: Thursday, November 22, 2007 11:59 AM
  To: Tesla Coil Mailing List
  Subject: [TCML] speeding up sync motors ?

  Hi all,

  Wonder if anyone has tried to speed up sync motors by using a higher 
  frequency (maybe 200 or 400hz)...  Options for this are either a 400hz 
  generator, or hack a regular DC to AC inverter to run at 400hz.... Just 
  pondering really!

  Cheers,
  Chris

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