Proposal and Verification of a Novel Doubly-Excited Variable-Flux Consequent Pole Motor

In this paper, we propose a new type of hybrid excited motor called “doubly-excited variable-flux consequent pole motor (DeVFCM)”. The DeVFCM consists of a three-phase double Y-connected armature winding with two neutral points, O1 and O2, and field poles with alternating permanent magnet and iron poles. When a DC voltage for supplying the field current is applied across O1 and O2 in such a configuration, the armature winding also acts as a field winding, and the magnetic flux through the iron poles can be adjusted. To validate the principle of this DeVFCM, a prototype machine was fabricated, and the basic characteristics of the prototype machine were investigated through three-dimensional finite element analysis and experiments. The results show that both high torque generation and loss reduction at high speeds can be achieved by adjusting the field current.