A design method for D-C machines

INTEREST in d-c machines in many phases of the war effort prompts the writers to present a method of design which has been found to be very useful and time saving. The method makes use of fundamental relationships in somewhat different forms and approaches the design from a different viewpoint than is ordinarily the case. The procedure has been in use for some time in the design of low-voltage aircraft motors and normal-voltage integral horsepower motors and generators. Comparative design and test results have shown good agreement.