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In this article winding schemes and calculation methods for original energy efficient electric machines are introduced. They are intended for application in electrical equipment of autonomous systems. These machines winding conductors have a rectangular cross-section. Slot connection spots and overhang parts are reduced. This allows one to reduce copper intensity and the machine length and improve...
This paper conducts a comparative study upon the performance of an electrical machine fitted with alternative winding conductor materials. The study focusses on an existing interior-mount PM machine (IPM), which is wound with copper (Cm) conductors in a single-layer “modular” topology. An analysis exercise is performed to investigate the impact of using alternative conductor materials, such as Aluminium...
This paper describes the simulation of currents in the synchronous condenser windings at turn-to-turn fault in the rotor winding, which is used in electrical power systems for compensation of reactive power and maintain the normal voltage level in the areas of concentration of the consumer loads. To this end, we have developed a mathematical equation model with the method of contour currents for line-to-line...
For the recently presented "Stator Cage Machine" an analytical calculation method is developed. First of all the magneto-motive force produced by the stator is analyzed and a definition for the number of phases of such machines is given. Following, parameters of the machine (resistance, inductivity and flux linkage) and the generated torque are calculated. As the machine does not contain...
This paper presents an improved analytical model for predicting the ac losses in form-wound windings used in high-performance ac machines attributable to the stator currents. The complete model comprises two sub-models that separately calculate the ac losses contributed by the in-slot and end-winding portions. 3D finite element analysis and experimental tests are conducted to demonstrate the usefulness...
Novel fractional slots tooth concentrated windings often consist of several winding systems. This structure allows creating good MMF distributions with low space harmonic contents. A good example is the combined wye-delta winding. Methods presented in this paper allow additional optimization steps in already designed electric machines containing the combined wye-delta winding even with fixed number...
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