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   sci.electronics.basics      Elementary questions about electronics      72,318 messages   

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   Message 71,369 of 72,318   
   Phil Hobbs to Bob Engelhardt   
   Re: Two diode vs four diode rectificatio   
   30 Jul 19 16:06:06   
   
   From: pcdhSpamMeSenseless@electrooptical.net   
      
   On 7/30/19 10:42 AM, Bob Engelhardt wrote:   
   > On 7/30/2019 10:04 AM, Peter Percival wrote:   
   >> What is the advantage of a four diode bridge full-wave rectifier over   
   >> a two diode full-wave rectifier.  There must be some, else why accept   
   >> the extra cost?   
   >>   
   >   
   > You don't need a center tapped transformer with 4 diodes, you do need it   
   > with 2.   
      
   Also you get better transformer utilization because the whole winding   
   conducts on both half-cycles.  That improves the RMS-to-average ratio   
   and reduces transformer heating (other things being equal).   
      
   Cheers   
      
   Phil Hobbs   
      
   --   
   Dr Philip C D Hobbs   
   Principal Consultant   
   ElectroOptical Innovations LLC / Hobbs ElectroOptics   
   Optics, Electro-optics, Photonics, Analog Electronics   
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   http://electrooptical.net   
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