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Interpole strength: Determining correct number of circuits

Publication date: 
February 2007
Chuck Yung, EASA Senior Technical Support Specialist
Type of media: 

I'm excited to be able to share a brand new DC repair tip. A conversation with two EASA members led to a method for determining whether the interpoles are connected with the correct number of circuits. Not only is this new method easy, it's a refinement of the interpole polarity test we routinely perform on every repaired DC machine. To explain why this method works, let's review some design basics and then use that information to determine the correct interpole circuits.