A flexible magnetic equivalent circuit model for simulation and analysis of wound rotor synchronous machines

Amanda E Scheinfeldt, Purdue University

Abstract

Wound rotor synchronous machines are used in a wide variety of applications including large terrestrial power generation, vehicular charging, and aircraft electrical systems. In these applications, a machine designer is faced with multiple performance objectives. These include maximizing efficiency, minimizing cost, and minimizing torque-ripple-induced vibration. In addition, there is often a desire to ensure some degree of fault tolerance. ^ In this research, a magnetic equivalent circuit-based model has been created to support the design and analysis of wound rotor synchronous machines. Model parameters include the B-H curve of the stator and rotor materials, the geometries of the conducting and magnetic materials, and the stator and rotor winding configurations. The outputs include the stator, rotor, and airgap flux densities, winding currents, and the electromagnetic torque. The inputs to the model are the stator and field winding voltages, which enables relatively straightforward coupling to external circuits for system-level simulation. The model has been configured to enable the study of 3-, 6- or 9-phase integer slot/pole/phase machines with arbitrary winding configuration. Demonstration of the utility of the model is shown using several example systems. ^

Degree

M.S.E.C.E.

Advisors

Steven D. Pekarek, Purdue University.

Subject Area

Engineering, Electronics and Electrical

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