Short-stroke, single-phase tubular permanent magnet motors for refrigeration applications.

The need for reduction of CO2 emission from refrigerator compressors has motivated the research which is described In this thesis. The main focus is the development of high efficiency linear motors for direct-drive linear compressor systems to be used in domestic refrigerators. Three design variants of tubular moving-magnet linear motors are identified as potential candidates. The analytical methods are established for predicting open-circuit flux density distribution, flux-linkage, back-emf and thrust force for each motor and the results are validated by finite element analysis.