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|    alt.engineering.electrical    |    Electrical engineering discussion forum    |    2,547 messages    |
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|    Message 887 of 2,547    |
|    Glen Walpert to All    |
|    Re: 3 phase to 1 phase    |
|    12 Jul 13 16:17:43    |
      From: nospam@null.void              On Fri, 12 Jul 2013 05:10:41 -0700, stryped1 wrote:              > On Thursday, July 11, 2013 8:21:12 AM UTC-5, stry...@yahoo.com 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!       >       > The balancer is 300 dollars. I would prefer a single phase unit, however       > I live in a small area in Kentucky and not alot nearby. And of course       > shipping on such an item would be very expensive if purchased online.       > I called the manufacturer and he said he would get me a price of the       > componets needed to convert it but that it would probably be more thna I       > would want to spend. It would require a single phase motor, a new board,       > as well as of course the plug.       >       > I have read conflicting things on using a converter on a balancer. Some       > say only the motor should be 3 phase and everything else within the unit       > should be single. Others have said everythign within is three phase. I       > have read that you cant use a vfd or static converter. I read rotary       > converters have very unplanced voltages on each of the legs so I wonder       > if this would affect the accuracy of the balancer.       >       > Kind of frustrating...              Without having either the balancer or it's schematic available the       questions you posed are unanswerable. You need to provide more       information to get anything other than suggestions of things you can look       into as already provided.              It is highly unlikely that the balancer computer/controler runs on 3       phase power. Most likely it will be powered from only 2 of the 3 input       leads, possibly through a single phase 230/120 control transformer. You       need to find or create (from inspection of the machine) a schematic for       power input to the machine controls including the rating of any       transformers, fuses or circuit breakers.              The motor nameplate will have the information required for specific motor       power recommendations. Essentially all info on the label is required,       including any design designation, insulation class, service factor,       voltage, full load current, or pretty much anything else on the label       could be significant.              Existing motor control means (contactor? - rating, overload element size,       source of control power, auxiliary contacts used/available) will also       influence your options.              All of your options could easily be botched, but one or more are       certainly viable if done correctly.              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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