Large Adjustable Speed Drives And Their Application To A High Speed Centrifugal Compressor

PaperPg. 81-85.New applications are being found for adjustable speed drives due to: 1) the availability of high current solid-state devices, 2) a simplified inverter design with large scale integrated circuits (LSI), and 3) because of the growing need for energy conservation. Several types of drives and their application to a high speed compressor will be described in this paper. The drives most suitable to high horsepower applications are: 1) the slip recovery drive (Scherbius), 2) the brushless DC system (synchro-converter) and 3) the current source inverter