I never gave this much thought ,I just accepted the fact the motor could be reversed.There is another post that has got the inquisitive juices flowing this morning,well actually yesterday and everytime I woke up last night.
I think I have a good understanding of how there is a phase shift between the start winding and the run winding due to start winding having smaller wire and less turns than the run winding blah,blah,blah.......Okay lets push the FWD Start button and everything is running fine,,,,now stop the motor,,,,,,,,"No problem yet".
Now lets REV the motor rotation,The switching arrangement in the control scheme reconnects(swaps) the conductors of the run winding end for end.I looked at several physical drawings of run windings and it appears the only difference now is that the wiring change over has also changed the ID of the run winding poles from N to S & S to N,if thats the case then the magnetic field of the run winding would also be reversed but at the same time opposing the start winding,,,,,,,"Having problems now".So if all of the above is fact and I'm not sure of that",is the newly directed magnetic field of the run winding overriding the magnetic field of the start winding as it should be trying to go the other way?,,,,,,,,,,"Now I am confused" The more I think about it the worse it gets. The run winding is wanting to rotate CCW and the start winding is wanting to rotate CW or vice versa.
Curious George would really like to know whats going on and how.
dick
I think I have a good understanding of how there is a phase shift between the start winding and the run winding due to start winding having smaller wire and less turns than the run winding blah,blah,blah.......Okay lets push the FWD Start button and everything is running fine,,,,now stop the motor,,,,,,,,"No problem yet".
Now lets REV the motor rotation,The switching arrangement in the control scheme reconnects(swaps) the conductors of the run winding end for end.I looked at several physical drawings of run windings and it appears the only difference now is that the wiring change over has also changed the ID of the run winding poles from N to S & S to N,if thats the case then the magnetic field of the run winding would also be reversed but at the same time opposing the start winding,,,,,,,"Having problems now".So if all of the above is fact and I'm not sure of that",is the newly directed magnetic field of the run winding overriding the magnetic field of the start winding as it should be trying to go the other way?,,,,,,,,,,"Now I am confused" The more I think about it the worse it gets. The run winding is wanting to rotate CCW and the start winding is wanting to rotate CW or vice versa.
Curious George would really like to know whats going on and how.
dick
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