Simulation, Design and Test of Brushless, Self-Excited Synchronous Field-Winding Machine

[摘要] The high cost of rare-earth materials has spurred interest in the development of high-performance electric machines which do not require these materials.However, other conventional machine architectures suffer from relatively low efficiency and power density when compared to rare-earth permanent-magnet machines. Synchronous field-winding machines have performance characteristics similar to those of rare-earth magnet machines. However, the power density and cost of conventional field-winding machines are adversely affected by the mechanisms which convey power to the field windings. This thesis presents a brushless, self-excited synchronous field-winding machine design. The rotor of this machine possesses two windings, a field winding and a ;;transformer” winding, that are connected through a diode rectifier circuit. Using field-oriented control techniques, an AC magnetic field is generated by the stator windings that is always aligned with the transformer winding. A simulation model which combines a finite element model of the machine’s magnetic behavior with a nonlinear circuit model of the diode rectifier is developed and used to design the machine. Experimental results from a prototype machine are presented.

[发布机构] University of Michigan

[效力级别] Finite Element Analysis

[关键词] Electric Machines;Finite Element Analysis;Field-winding machine;Self-Excited;Brushless;Synchronous machine;Field Oriented Control;Electrical Engineering;Engineering;Electrical Engineering: Systems