Optimized high-efficiency MICA actuators for space compressors

Abstract:
Moving Iron Controllable Actuators MICA(TM) are magnetic linear actuators from CEDRAT TECHNOLOGIES (CTEC) that find interests in applications requiring high-force density and low heating. Because of these attractive performances, some space applications such as ZBO Gas compressors and Pulse Tube Cryocooler are considering their use in operational missions. However, this last application requires the demonstration of additional features, notably a high efficiency, a long lifetime and a good force homogeneity to minimize the generation of exported micro-vibrations. To fulfil these additional features, CTEC has developed an optimised MICA following the specifications of the Pulse Tube Cryocooler (PTC) of AIR LIQUIDE. The paper will present the performance progresses obtained on this customized MICA, from modelling prediction to lab tests of Engineering Models.