Design of Shell-Type D-C Motors for Minimum Weight

The paper deals with the design of shell-type d-c motors. The chosen performance parameter is the torquesquared-to-inertia ratio, or power rate, which appears to be proportional to the mass of the motor. A design procedure without any trial-and-error is proposed, and for a given power rate an improvement of weight between 10 and 15 is achievable. This result shows the theoretical feasibility of developing electric actuators for missile applications insofar as dynamic performance and weight are concerned.