Hybrid machines for DC generation
Abstract
In this research, hybrid machines utilizing both a field winding and permanent magnets (PMs) are investigated for fixed-speed generation, and compared to the wound rotor synchronous machine (WRSM) and the permanent magnet synchronous machine (PMSM). To this end, analytical design models are developed for the WRSM and six variants of hybrid machine topologies. Within the models, the field distribution, the machine parameters, terminal quantities, torque, mass, and losses are established from design data containing material properties, stator and rotor geometries, and winding layout. The machine parameters include resistances, inductances, and the back-emf. The analytical design models are validated using finite element analysis (FEA); for the WRSM the models are further validated using test data. The models are utilized, along with the presented system-level models, to predict behavior when connected to line-commutated rectifiers with a DC side filter. The machine-rectifier system models are used in a multi-objective design process to establish the trade-off between mass and loss. The design data for machines with a common weighted average loss is presented. Two hybrid topologies are recommended for further study.
Degree
Ph.D.
Advisors
Pekarek, Purdue University.
Subject Area
Electrical engineering
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