DESIGN AND DEVELOPMENT OF A NEW RANGE OF LARGE ac MOTORS.

A small multi-disciplined project group was established to undertake the design and development of a range of medium ac motors, including the manufacture of a prototype machine, within a six months period. This paper describes the development of the range fundamental design principles, manufacturing concepts and the manufacture of four prototype machines. The group were involved, at later stages, in the preparation of the range detail designs, manufacturing data, and commercial information leading to the subsequent introduction of the Unipak range into the market. This also included technical and commercial personnel training sessions.