Mr. Pytel, Thank you so very much for all of the efforts you put into making this extremely valuable education available. I can't imagine how great it would be to a student in your classroom. I'm going to be installing and repairing more and more motor and machine controls in the very near future. Your education series here is helping me greatly. Thanks again!
Don't give me too much credit. I just turn the mike on, click record, and make it up as I go along. Just kidding. Thanks for the kind words. Lots of work goes into this material and I'm glad you're make use of it.
I wish this video was available back when I was in HVAC school in the Motors and drives class. My instructor was good the book had great illustrations and explanations but you put it in a video that brought it all the gather and laid out descriptions and kept them on one page so the eyes of the student who easily gets lost when pages are flipped to another description loses track of what was on the page before. For all those students who have the problem with flipping pages and forgetting what the illustration or the description On just one page backwards this video was made for getting the education through to those who are struggling.
I agree whole hardily! I wish my electronic/electrical Professors would have done a better explanation in college, the theories didn't sink in until I got trained in the Navy for avionics maintainer, and when I got a job w/ the FAA and they sent me to the Academy!
Thank you for sharing Jim, the illustrations in the video are a great help. I've forwarded your channel on to the apprentice. The majority of York motors on large tonnage machines are either three or six lead delta run. This is due to the usage of VFD's. A twelve lead delta run is a rare motor these days.
At 13:26. I have studied the case of wrong connection of one end of the winding C and it seems the stator magnetic field rotates with jerks CCW( 2 poles CCW then 1CW,then 2poles CCW,then 2poles CCW,then 1 pole CW,then 2 poles CCW making one complete revolution during 1 full cycle of sine wave.As I see the rotor rotates with jerks CCW instead of normal CW rotation and makes 3600 revs per minute having one pair of poles per phase.But there should be a dynamic load on the running rotor as it jerks forward then back,but theoretically the rotor should rotate 3600 revs per minute in the CCW.
I am trying to find video of connection diagram for dual speed motor diagram, dahlander motor. The winding diagram of dual speed motor and dual voltage looks same. On internet there are lots of info but not clear,, like you explain. Please make a video for dual speed motor, and also multi winding dual speed motor.
Would you , please, explain how to connect proprly stator windings in the motor where all labels are missing. This is not simple when you using OHM meter because there will be current direction issue. Thanks.
Oh dude ... I feel your pain. Yes, there are a couple techniques to do this and, as you mentioned, polarity is a major concern. I should actually do a video on this since you're not the first person to ask this question. I will mention it necessitates an old school analog (ie: needle) DMM so you might want to start hitting the thrift shops to see if you can score yourself one of these dinosaurs.
All 3 phase systems are dual voltage. Line to neutral (lower Y) and line to line (higher delta). This is odd because the Y is higher and the delta lower? Strange.
I just found some literature on the pump motor. It’s a Grundfos pump and it roughly states, in an effort to standardize and minimize part numbers, they created this 6 wire, dual voltage (230/460) 3 phase direct-on-line motor. Connect 230 volt use low volt delta. Connect 460 volt use high volt star.
Great video! I also came here for this comment. I, too, have a 6 lead LV ∆ and HV Y motor. Sew Eurodrive model. I almost fried it because all motors in my plant are HV ∆ and I almost connected the LV to 480.
