From: look165@numericable.fr   
      
   I wonder how a fork can finish in the pump !   
      
   etpm@whidbey.com a écrit le 10/01/2019 à 23:53 :   
   > On Thu, 10 Jan 2019 09:52:03 -0800 (PST), mrdarrett@gmail.com wrote:   
   >   
   >> On Thursday, January 10, 2019 at 9:23:52 AM UTC-8, Look165 wrote:   
   >>> The ones you have at home.   
   >>>   
   >> A typical American home may have:   
   >> - Shaded pole motors on desk fans and circulating air for the   
   refrigerator.  (I was really upset when I found the old broken dishwasher in   
   my parents' home had a giant shaded pole motor for the water pump.)   
   >> - Universal motors for dough mixers, blenders, drills and circular saws   
   >> - 3-phase motors driven by control electronics for washing machines   
   >> - brushless motors for remote-controlled model aircraft, and possibly for   
   modern appliances   
   >>   
   >> Michael   
   >>   
   > The reason for the big shaded pole pump motor is because they draw   
   > pretty much the same current when stalled as when running. So if the   
   > design allows sufficient cooling without a fan then if the pump motor   
   > is stalled with food debris or a fork or something it won't burn up.   
   > Granted, there are other ways to deal with stalled motors but the   
   > shaded pole solution is simple and cheap. Except that you pay more for   
   > the power to run the motor. This can be a wash though, so to speak.   
   > Just save all your dirty dishes until the weather gets cold when the   
   > extra heat from the pump motor will warm your house. Actually, I   
   > supose a clever design would use the heat from the pump motor to help   
   > warm the washing water.   
   > Eric   
      
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