Voltage and power limitations of generation systems with uncontrolled PMSMs and DC/DC converters

Uncontrolled Generation (UCG) systems can be used in vehicles for their low cost and high reliability. This paper analyzes the output characteristics of UCG taking parameters and speed into consideration. New normalization method is used to simplify the analysis and the calculation. The voltage and power limitations are calculated in the normalized frame which is independent to the machine parameters. The results will help design the parameters of the PMSM generators. The analyses are partly verified by experiment.