Corona and Motor Voltage Interim Report

Hsu, J.S.

Oak Ridge National Laboratory

关键词: Inverters;    Breakdown;    Testing;    Electrical Insulation;    Motors;   

DOI  :  10.2172/885951
RP-ID  :  ORNL/TM-2005/60
RP-ID  :  DE-AC05-00OR22725
RP-ID  :  885951

美国|英语

来源: UNT Digital Library

【 摘 要 】

It has been suggested that to meet the FreedomCAR objectives for cost, size, weight, efficiency, and reliability higher buss voltages be utilized in HEV and FC automotive applications. The reasoning is that since electric power is equal to the product of voltage and current for a given power a higher voltage and lower current would result in smaller cable and inverter switching components. Consequently, the system can be lighter and smaller. On the other hand, higher voltages are known to require better and thicker electrical insulation that reduce the available slot area for motor windings. One cause of slow insulation breakdown is corona that gradually erodes the insulation and shortens the life expectancy of the motor. This study reports on the results of a study on corona initiating voltages for mush-wound and bobbin-wound stators. A unique testing method is illustrated.