Series-wound heteropolar inductor motor for automotive applications

This work considers a method of control for a heteropolar inductor motor for use in automotive applications. Previously, power factor for this type of machine was considered to be too low, and operation in the high-speed / constant-power region was not easily realized. To make the machine amenable to control with an automotive inverter and to eliminate the need for a separate field controller, the field winding is driven by a rectifier bridge attached in series to the phase windings. Motor currents are then prescribed by a novel vector control scheme that realizes high power factor over a wide range of operation.