Improved redundant force motor.

摘要

A force motor having four magnetic lanes arranged annularly around an axially movable central shaft (110), where the shaft (110) is connected to an armature (128) which also moves axially with the shaft within a gap located between two coils (154, 155) forming each lane of the motor. The four magnetic lanes are electrically and magnetically independent and provide three levels of safety-redundancy in case of coil failure. <IMAGE> <IMAGE>