Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. brewersean

    Simple motor wiring question

    What about if I install a 3 pole double throw switch that will allow me to start the motor without the VFD and then switch to the VFD once the motor is running, removing the starting capacitor from the circuit in the VFD mode?
  2. brewersean

    Simple motor wiring question

    I've just beenthinking.. When I take the VFD out and just wire it straight to the pump, it spins fine. Obviously it's more or less instantaneously 1OO percent RPM immediately.. so I'm wondering, is there a way I can set the VFD to start the pump at full speed, then allow me to lower it? That...
  3. brewersean

    Simple motor wiring question

    Thanks for the responses. There aren't any parameters I saw on there that have had an effect on the VFD tripping upon starting up. When I first attached it, it only tripped at about 3OHz. Now it is tripping before it even gets to its minimum frequancy of 2O. Any other ideas before I give up? Sean
  4. brewersean

    Simple motor wiring question

    Thanks again for the reply! I was able to rewire it to get it to spin in the right direction. You say the U line should be connected? I have it un-connected now, because the directions say ''connect secondary coil after removed capacitor'' but I still have the starting and running capacitors...
  5. brewersean

    Simple motor wiring question

    I have done more research and it seems if I slowly ramp up speed on the VFD, it doesn't trip. As for the rotation direction, it seems reversing the polarity of the starting capacitor should reverse the rotation direction. MY QUESTION IS: shall I also reverse the polarity of the running...
  6. brewersean

    Simple motor wiring question

    Thanks for the reply zlatkodo. Firstly, Can you tell me what AT2 wiring is? In any case, I am surprised you say you doubt it'll work. Why not? Regardless of the Chinese instructions, etc, it is certainly possible to wire a VFD to a single phase motor, correct? Any other suggestions out there?
  7. brewersean

    Simple motor wiring question

    Thanks for all the replies. My apologies, I think I got the phasing of the motor wrong. It looks like a single phase motor. It is still spinning the wrong way. I see on here (https://img.yumpu.com/37346484/1/500x640/single-phase-cap-start-cap-run-motors-rotor-uk.jpg) that I can change the...
  8. brewersean

    Simple motor wiring question

    Hi, I have a very basic knowledge of electricity and motors, but have run into a bit of a bind. I have a single phase 16A 22OV power supply for a 3 phase motor (http://www.cnyuy.com/sanitary-centrifugal-pump/yuy-l-sanitary-centrifugal-pump) I am trying to install a VFD on. I have two...

Part and Inventory Search

Back
Top