VFD

Discussion in 'General Electronics Chat' started by WECtech, Oct 1, 2012.

  1. WECtech

    Thread Starter New Member

    Sep 30, 2012
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    New to VFD's. Does anyone have information on to wire an SK Commander to Leeson AC motor?Ω
     
  2. BSomer

    Member

    Dec 28, 2011
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    106
    You can get the manuals from here.
     
  3. BMorse

    Senior Member

    Sep 26, 2009
    2,675
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    Do you have any specs on the Leeson Motor? (HP, Electrical ratings, model #, etc.)
     
  4. BSomer

    Member

    Dec 28, 2011
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    Just noticed that you have to be registered to get the manuals there. Digging around on my work computer I found that I have them. The one I am posting here is the getting started guide which shows the hook-up diagrams and such. There is another manual that has all the programming parameters that is too big to post here.
     
  5. WECtech

    Thread Starter New Member

    Sep 30, 2012
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    0
    I’m looking to install a Commander SK SKB3400075 on a Dake Press with a ¾ hp/0.56 kw, 1800 RPM, 3-phase, 60 hz, Leeson AC electric motor. Looking at the installation instructions I’m coming up with two potential parameter options for the SK. I’m looking in the “getting started guide” for model size A,B,C and D, part number 0472-0000-10, issue 10. On page 27 is the programming options. For my need to simply lower the motor speed I thought to use Pr 05 = AV.Pr or Pr 05 = E.Pot.

    I've attached the Commander SK getting started guide.

    Thansk for the help,
    DW
     
  6. BSomer

    Member

    Dec 28, 2011
    433
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    To use the AV.Pr setting you need to hook up a 2KΩ to 10KΩ pot to terminals T1, T2, and T3 as seen in figure 6-2, then set Pr.16 to VoLt. This is one of the most common methods I have used and seen along with the 4-20mA signal. It is fairly straight forward to set up and use. Using this setting also allows for the use of the digital inputs for preset speeds which can be readily configured by Pr. 18-21.

    The E.Pot setting is something I have no experience with though. I am not too sure what it is supposed to be.
     
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  7. WECtech

    Thread Starter New Member

    Sep 30, 2012
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    Why do I need the 2-10k POT if I'm going to control the speed of the motor with Pr 18-21?Ω
     
  8. BSomer

    Member

    Dec 28, 2011
    433
    106
    The pot gives you an adjustable speed/frequency from your minimum (Pr.01) to your maximum (Pr.02). If you just want to have some set speeds for the motor, set parameter Pr.05 = Pr. This will give you 4 different speeds based on the inputs at T4 and B7. Wire it according to figure 6-4 and configure Pr.18-21 with the frequency you desire. The switches on T4 & B7 must be a maintained contact type, like a standard toggle switch.
     
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