Abstract:
An electrical machine (22) incorporates foil bearings (24) which are radially interposed between the stator assembly (26) and the permanent magnet of a rotor shaft (12), thus reducing the required axial length of the shaft and increasing the rotational speed at which the shaft bends incident to resonance.
Abstract:
A floating speed electrically driven suction system (10) for sucking boundary layer air flow off the external surface (14) of an aircraft. A variable speed electrical generator (22) drives a variable speed electrical motor (28) which in turn drives a variable speed pneumatic compressor (48, 50). Inlet guide vanes (53) are automatically adjustable to compensate for variations in pressure. A surge control valve (78) is operable to port in additional inlet flow as needed to avoid low volumetric surge in the suction compressor.
Abstract:
A redundant electrical drive motor has a rotor assembly including a pair of coaxial permanent magnet sections (2, 4) and a pair of stator assemblies (16, 18), one for each of the magnet sections (2, 4). The magnet sections and the stator assemblies are mounted in tandem. The arrangement described minimizes motor size and weight and achieves high reliability and efficiency for applications where a back-up or redundant capability is required.
Abstract:
A redundant electrical drive motor has a rotor assembly including a pair of coaxial permanent magnet sections (2, 4) and a pair of stator assemblies (16, 18), one for each of the magnet sections (2, 4). The magnet sections and the stator assemblies are mounted in tandem. The arrangement described minimizes motor size and weight and achieves high reliability and efficiency for applications where a back-up or redundant capability is required.
Abstract:
An electrical machine (22) incorporates foil bearings (24) which are radially interposed between the stator assembly (26) and the permanent magnet of a rotor shaft (12), thus reducing the required axial length of the shaft and increasing the rotational speed at which the shaft bends incident to resonance.
Abstract:
Un rotor (10) comprend un aimant permanent à haute énergie (12) contenu dans une gaine (14) et lié à celle-ci par un procédé métallurgique. La liaison métallurgique confère une résistance mécanique à l'aimant (12), empêchant ainsi la propagation des fissures dans l'aimant pendant le fonctionnement du rotor (10) et réduisant au minimum la barrière thermique pendant le transfert de chaleur de l'aimant (12) vers la gaine (14).
Abstract:
An actuating system for a primary flight control surface including unique electric drive motors having an integral detent mode. The motors include a unique laminated stator core and means for changing the continuity of the magnetic circuit. The stator core structure is split into two part-cylindrical elements which define air gaps between their opposing ends. Flux gates fill the air gaps and provide magnetic circuit continuity. The flux gates are connected to solenoids which can displace the flux gates in and out of the air gaps, thereby changing the continuity of the magnetic circuit of the motor. The motor rotor aligns its magnetic axis with the air gaps, and will resist substantial imposed torque loads.
Abstract:
Système d'actionnement des gouvernes primaires d'un avion comprenant des moteurs d'entraînement électriques nouveaux présentant un mode de détente incorporé. Les moteurs comprennent un noyau statorique stratifié nouveau et un système permettant de changer la continuité du circuit magnétique. La structure du noyau statorique est divisée en deux éléments partiellement cylindriques qui définissent des entrefers entre leurs extrémités opposées. Des transmetteurs de flux remplissent les entrefers et assurent la continuité du circuit magnétique. Les transmetteurs de flux sont connectés à des solénoïdes qui peuvent déplacer les transmetteurs de flux à l'intérieur et à l'extérieur des entrefers, ce qui a pour effet de changer la continuité du circuit magnétique du moteur. Le rotor du moteur aligne son axe magnétique par rapport aux entrefers et peut donc supporter les couples importants auxquels il est soumis.
Abstract:
A rotor assembly (10) comprises a high energy product permanent magnet (12) contained within a sheath (14) and metallurgically bonded thereto. The metallurgical bond imparts mechanical strength to the magnet (12) thereby preventing crack propagation therewithin during operation of the rotor assembly (10) and minimizes the thermal barrier to the transfer of heat from the magnet (12) to the sheath (14).
Abstract:
A redundant electrical drive motor has a rotor assembly including a pair of coaxial permanent magnet sections (2, 4) and a pair of stator assemblies (16, 18), one for each of the magnet sections (2, 4). The magnet sections and the stator assemblies are mounted in tandem. The arrangement described minimizes motor size and weight and achieves high reliability and efficiency for applications where a back-up or redundant capability is required.