Synchronous motor with salient poles rotor and all coils placed on the stator

In this paper, we consider a new design of a synchronous motor with salient rotor poles and all coils placed on the stator. This design uses a laminated silicon steel rotor, which is not as expensive as a rotor with super strong permanent magnets. This machine design eliminates copper rings on the rotor and brushes which is used in regular synchronous motors, and eliminates disadvantages involved with these arrangements. 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 poly phase synchronous machines. In the paper, we suggest a new single phase, and two 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, a two-phase synchronous motor was designed and tested. The single-phase motor was tested on the base two phase motor. Results of the test of the prototype machine confirm the main useful properties of synchronous machines.