New motor winding design 'eliminates bearing currents'
New motor winding design 'eliminates bearing currents'
(OP)
Does someone know something more about this issue and may have some example for such "new winding arrangement"?
http://w ww.drives. co.uk/news /technews/ news_techn ews17.html
Zlatkodo
http://w
Zlatkodo





RE: New motor winding design 'eliminates bearing currents'
Are properly designed and built motors at risk to develop dangerous bearing currents?
Wolf
www.hydropower-consult.com
RE: New motor winding design 'eliminates bearing currents'
http:/
Looks pretty close though.
John
RE: New motor winding design 'eliminates bearing currents'
The role the windings play in the process is related to their capacitance to ground. Given that the windings need to be in intimate contact to the core for heat transfer reasons, and then insulating materials tend to have high dielectric constant, I have a hard time understanding what would be done to the winding to reduce this capacitance.
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(2B)+(2B)' ?
RE: New motor winding design 'eliminates bearing currents'
http:/
Zlatkodo
RE: New motor winding design 'eliminates bearing currents'
The ABB patent (post by dArsonval (Electrical)) is somewhat newer. But, as far as I know, the patent (first date on the letter is october 2003) has not led to any changes in ABBs motors.
The thinking behind the ABB patent is correct. But the practical implications don't seem to allow standard motors to be made that way. And, still, the winding technique only addresses the problem with inductively coupled voltages and, perhaps, capacitively coupled voltages. It does not help against frame voltage and externally coupled energy.
Gunnar Englund
www.gke.org
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