A Study on the Operation and the Control of a Poly-phase d.c. Commutatorless Motor

The quick response characteristics and good controllability of a poly-phase d.c. commutatorless motor are compatible, in principle, with those available in ordinary d.c. motors, and its stable operation in four quadrants can be effected by phase control through the use of 3-phase and poly-phase thyristor rectifiers. This paper summarizes the principles of the poly-phase d.c. commutatorless motor, and gives a brief report on the design example and outline of the operating control characteristics of a 7-phase d.c. commutatorless protocol motor without reliance on the armature reaction compensation