SERIES FIELD FOR PERMANENT MAGNET MACHINE
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Abstract
A DYNAMOELECTRIC MACHINE HAVING PERMANENT MAGNET FIELD POLES SUBJECT TO DEMAGNETIZATION DUE TO ARMATURE REACTION, AND FIELD COILS DISPOSED ON SAID POLES AND ELECTRICALLY ASSOCIATED WITH SAID ARMATURE TO PROVIDE CUMULATIVE AMPERE-TURNS TO COUNTERACT SAID DEMAGNETIZATION AS A FUNCTION OF ARMATURE CURRENT AND MACHINE LOAD.
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