High temperature electromagnetic actuator
AssigneeRCT Systems, Inc.
InventorsGerald K. Foshage, Mark Bryant
Life of this patent
Estimating the term…
Abstract
An electromagnetic actuator is provided. The electromagnetic actuator includes a planetary roller screw and at least two motor assemblies disposed on opposing sides of the roller screw. The planetary roller screw includes a shaft linearly translatable between an extended position and a retracted position, a nut rotatable about the shaft, and a plurality of rollers coupling the nut to the shaft. A spur gear is fixedly connected to the nut. Each motor assembly includes a DC motor having an output shaft, a planetary gear head coupled to the DC motor output shaft and having an output shaft, and a pinion gear coupled to the spur gear and fixedly connected to the planetary gear head output shaft.
Claims20
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.
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 planetary roller screw nut, each motor assembly including:
- a variable reluctance machine having a variable reluctance machine output shaft,
- a planetary gear head, coupled to the a variable reluctance machine 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.
A system for controlling a geometry of a jet engine nozzle, comprising:
- a plurality of electromagnetic actuators, each electromagnetic actuator including:
- 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 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 a 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;
- and
- a controller electrically coupled to the plurality of electromagnetic actuators.
Dependencies are inferred from the claim text.