Synchronous Motor with Silicon Steel Salient Poles Rotor and All Coils Placed on the Stator

In this paper, we consider a new design of synchronous motor with salient poles rotor and all coils placed on the stator. This design, uses a laminated silicon steel rotor, which is not so expensive as a rotor with super strong permanent magnets. This design of machine eliminates copper rings on the rotor and brushes which is used in regular synchronous motors, and eliminates disadvantages involved with these arrangements. In an earlier publication, authors considered the opportunity realization of synchronous mode operation in the machine with salient pole rotor and DC stator excitation. Now, we consider the new synchronous mode operation with individual DC excitation of each the alternative current (AC) windings for realization the first, second and third phase synchronous machines. In theoretical basics of analyses and design of synchronous motors we pay more attention to the single-phase motor because it is the basis for design polyphase synchronous machines. In the paper, we suggest a new single-phase, two phase and three phase synchronous motor configuration. These synchronous machine configurations can work in DC mode operation without changing the electronic power circuit. This property can also be used for starting synchronous machines. The prototype, two phase synchronous motor was designed and tested. The single-phase motor was tested on the base two phase motor. Results of the test from these prototype machines confirm the main useful properties of synchronous machines.