Patent ID: 9605736
Date: 2017-03-28
CPC Classifications: F02K,F16H

Claim:
1. An electromagnetic actuator for controlling a geometry of a jet engine nozzle, comprising: a planetary roller screw, including: a planetary roller screw shaft, linearly translatable between an extended position and a retracted position, connected to the jet engine nozzle, a nut, rotatable about the planetary roller screw shaft, and a plurality of rollers coupling the nut to the planetary roller screw shaft; a spur gear fixedly connected to the nut; and at least two motor assemblies, disposed on opposing sides of the planetary roller screw, coupled to the nut, each motor assembly including: a DC motor having an DC motor output shaft, a planetary gear head, coupled to the DC motor output shaft, having a planetary gear head output shaft, and a pinion gear, coupled to the spur gear, fixedly connected to the planetary gear head output shaft, and an electromagnetic actuator housing including a pair of trunions, disposed on opposing sides of the planetary roller screw, connected to respective bearings disposed on a jet engine body.