Boost Choke Integration into DC Serial Wound Motor

The paper deals with a realization of a dual power supply for serial DC motor. Usually this is achieved with a parallel operation where one power supply is connected directly while the other is coupled through the power converter. The proposed solution is based on Boost converter attached between the DC power supply and motor. The solution is unique due to integration of Boost choke winding on the stator pole thus omitting the use of additional magnetic core. The Boost choke winding has therefore two functions; i) it is part of the Boost converter and ii) it magnetizes the stator core of the motor (when the DC power supply is active). To avoid the increase of the nominal voltage of built in rectifier diodes, and secondly to minimize the interaction between both power supply, the magnetic coupling between the original stator winding and the Boost one should be weak.