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The potential pitfalls of parallel circuits

  • September 2003
  • Number of views: 2198
  • Article rating: No rating

Cyndi Nyberg 
Former EASA Technical Support Specialist 

To make more efficient use of time and materi­als, winders may want to increase the number of parallel circuits when winding an AC stator (or wound rotor). However, there are limits to the num­ber of parallel circuits that can be used in an AC stator (or wound rotor) design. In this article, some of the potential problems associated with increas­ing the number of parallel circuits will be analyzed. 

If the original design of a motor has few turns with large wires, or many wires in hand, it may be easier to rewind if the number of parallel cir­cuits can be increased. Doubling the circuits, for example, doubles the turns per coil and cuts in half the wire size or the number of wires in hand. Of course, doubling the circuits also doubles the volts per coil. 

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