Analytical modeling of the air-gap field in reciprocating moving-magnet actuators

Abstract Critical to the efficient operation of reciprocating diaphragm compressors is the design of the tubular moving-magnet actuator to satisfy the moving mass to axial stiffness specification. A design methodology, based on analytical models, allows the merits of candidate designs to be compared, on the basis of efficiency, cost, overall weight, etc. without recourse to finite element analysis. Analytical techniques have been developed for predicting the air-gap field and force capability, and validated by both finite element analysis and practical measurements.