LIFT AND HOLD DIFFERENTIAL LIFT PDU UTILIZING A PERMANENT MAGNET ROTOR

A power drive unit (PDU) for moving cargo relative to a cargo bay (152) of an aircraft (150) includes a cam shaft (109). The PDU also includes a lift cam (108) coupled to the cam shaft and configured to cause the PDU to be in at least one of a raised position or a lowered position based on rotation...

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Bibliographische Detailangaben
Hauptverfasser:	STEGMILLER, Wesley K, SCHEER, Dustin P, ROBERTS, Aaron, HARMS, Scott
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AIRCRAFT ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSIONTRANSMISSIONS IN AIRCRAFT AVIATION BLASTING CONVERSION OR DISTRIBUTION OF ELECTRIC POWER CONVEYING COSMONAUTICS DYNAMO-ELECTRIC MACHINES ELECTRICITY ENGINEERING ELEMENTS AND UNITS EQUIPMENT FOR FITTING IN OR TO AIRCRAFT FLYING SUITS GEARING GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERATION HANDLING THIN OR FILAMENTARY MATERIAL HEATING LIGHTING MECHANICAL ENGINEERING PACKING PARACHUTES PERFORMING OPERATIONS PNEUMATIC TUBE CONVEYORS SHOP CONVEYOR SYSTEMS STORING THERMAL INSULATION IN GENERAL TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING ORTIPPING TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	A power drive unit (PDU) for moving cargo relative to a cargo bay (152) of an aircraft (150) includes a cam shaft (109). The PDU also includes a lift cam (108) coupled to the cam shaft and configured to cause the PDU to be in at least one of a raised position or a lowered position based on rotation of the cam shaft. The PDU also includes a permanent magnet motor (102) configured to generate a cogging torque sufficient to resist rotation of the cam shaft such that the PDU remains in the raised position in response to power being removed from the permanent magnet motor.