From: nospam@null.void   
      
   On Thu, 11 Jul 2013 06:21:12 -0700, stryped1 wrote:   
      
   > I found a Hunter DSP 9000 wheel balancer I would like to have for my   
   > home shop. The problem is it is 230 volt three phase. I only have single   
   > phase available to me.   
   >   
   > Can anyone tell me if a static converter would work for this application   
   > or what is the cheapest esiest way to make something like this work?   
   >   
   > I appreciate it!   
      
   Static converters work for all but hard to start motors such as 3450 RPM   
   or higher speed motors, motors with direct coupled high inertia loads, or   
   motor designs with inherently low starting torque.  Most 1725 RPM 3 phase   
   motors will start easily with an appropriately rated static converter,   
   but the wheel spin motor on a balancer might be an exception as the ones   
   I have seen start fairly slowly due to the wheel inertia.  Since these   
   motors are fairly small a single phase input Variable Frequency Drive   
   might be a better alternative, but this requires rewiring the motor   
   contactor to the VFD RUN control terminals and direct wiring the VFD to   
   the motor.  Either way you will need to be sure the single phase loads in   
   the machine are powered from your single phase line, with only the motor   
   connected to the derived phase of a static converter or the output of the   
   VFD.   
      
   A quick check on eBay turned up a couple of single phase Hunter DSP   
   9000's for around $800, which might be more economical than getting a   
   converter for the 3 phase machine unless you are getting a really good   
   deal on it.   
      
   A rotary converter would also work, but with additional size and expense.   
      
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