Hamilton Sundstrand Patente

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An integrated magnetic current sensor is provided. Aspects include a first transformer (109) comprising a magnetic core, a first primary winding and a first secondary winding, a voltage source configured to supply a first alternating current (AC) voltage to the first secondary winding, a second transformer (110) comprising, the magnetic core, a second primary winding, a second secondary winding, and a third secondary winding, wherein the first primary winding and the second primary winding are connected in series, and a bi-directional current source (140) configured to bias a magnetic field in the magnetic core by supplying a current to the second secondary winding responsive to a sense current flowing through the first primary winding and the second primary winding.

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An assembly for manually rotating a rotor includes a housing (14) enclosing a first shaft (16) and a second shaft (18) accessible through an exterior wall of the housing. The first shaft extends from a first end rotationally coupled to the rotor to a second end selectively engageable with the second shaft. The second shaft includes a thrust plate (40) extending from and rotatable with the second shaft. A spring (34) disposed between the thrust plate and the housing biases the second shaft towards the exterior wall of the housing.

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A magnetic pass-through controller (200) of an in-helmet display (115)includes internal components inside a helmet. The internal components include a magnet assembly (285) holding one or more internal magnets (275) and a swing arm (290) affixed to the magnet assembly and affixed to the in-helmet display. External components outside the helmet include an external magnet housing (220) holding one or more external magnets (225) and an adjuster (210) for manual rotation. The adjuster is coupled to the external magnet housing such that the manual rotation of the adjuster causes a corresponding rotation of the external magnet housing. Magnetic coupling between the one or more internal magnets and the one or more external magnets causes the corresponding rotation also in the magnet assembly and the swing arm.

A heat exchanger (10) includes a core (12). The core includes a first layer (22) and a second layer(42). The first layer includes a first plurality of fluid inlets (24). The second layer includes a second plurality of fluid inlets (44). The heat exchanger also includes a fluid header (60) attached to the core adjacent the first plurality of fluid inlets and the second plurality of fluid inlets. The fluid header (60) includes an inlet (62), an outlet (66), a plenum (64) between the inlet and the outlet, and a flow control mechanism (68) within the plenum (84). The flow control mechanism selectively directs fluid through the first plurality of fluid inlets, through the second plurality of fluid inlets, or through both the first plurality of fluid inlets and the second plurality of fluid inlets.

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A heat exchanger includes a stack (106) of flow conduits. Each flow conduit is configured to conduct a fluid. Parting sheets (124) separate adjacent flow conduits in the stack, providing heat transfer between them. Each of the flow conduits includes vanes (110, 112) extending along a vane path and between top and bottom parting sheets. The vanes are separated from one another, thereby creating flow channels. Each flow conduit also includes a plurality of flow modifiers (136), each adjacent to a corresponding leading edge of a corresponding vane, so as to cause a disrupted portion of a fluid flow to be incident upon the corresponding leading edge. Each of the flow modifiers includes an aerodynamic portion and a gap portion. The aerodynamic portion extends from at least one of the top and bottom parting sheets. The aerodynamic portion does not connect the top and bottom parting sheets due to the gap portion.

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A layer (30) for a heat exchanger (10) is disclosed. The layer comprises: an inlet (32); an outlet (34); an upper sheet (36); a lower sheet (38); a fluid flowpath defined between the upper sheet and lower sheet and from the inlet to the outlet; and at least one pin (100) disposed in the flowpath and connecting the upper sheet to the lower sheet; wherein the lower sheet has a first undulating profile; and wherein the upper sheet has a second undulating profile different from the first undulating profile. Also disclosed is a heat exchanger (10) including the layer (30), and a method of making a layer for a heat exchanger.

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A magnet for a surface permanent magnet machine is provided. The magnet comprises a magnet body having a first surface, wherein the first surface comprises an inner part and an outer part, wherein the outer part is axially outwards of the inner part in use. The first surface comprises a plurality of slits, wherein a density of the slits is greater at the outer part than at the inner part. Also provided is a surface permanent magnet machine comprising at least one of the magnets, a surface permanent magnet motor comprising at least one of the magnets and an aircraft comprising the surface permanent magnet machine.