XPost: sci.electronics.equipment, sci.electronics.design, sci.el   
   ctronics.basics   
   From: dhky@shaw.ca   
      
   On 19/08/2013 10:33 PM, Spehro Pefhany wrote:   
   > The power rectifiers connected to the Wye common are used to extract   
   > 3rd harmonic power- yielding up to 10% additional current capacity-   
   > when operating at high speed.   
   That doesn't make sense to me. One advantage of 3 phase is the   
   elimination of triplen harmonics. Now, with a 3 phase bridge-will there   
     be a significant 3rd harmonic voltage? Certainly,if the wye neutral is   
   not connected to the DC ground, there is no 3rd harmonic current and   
   power. Generally this is a good thing.   
   Somehow, I appear to be missing something-could you elucidate? A circuit   
   diagram and analysis would help.   
      
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   Don Kelly   
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