Design details of the experimental airgap-wound C172 traction motors for Class 45 locomotives (TM-ES-60)

Theoretical and experimental aspects of the airgap-wound d.c. traction motor project have been reported in a series of earlier memoranda (Refs 1-6). The purpose of the project is to alleviate the problem of commutation. It has been confirmed that the airgap winding does give major improvements in commutation. Most...