Abstract

Asymmetric multi-pulse transformer rectifier unit (TRU), and associated systems and methods are described herein. In some embodiments, the transformer includes a 3-phase delta or wye primary coupled to a galvanically isolated 3 -phase delta secondary with correction windings placed per the transformer schematic to provide a multi-pulse (e.g., 18-pulse or 24-pulse) asymmetric output. Such construction provides passive multiphase PTC and harmonic cancellation and allows multi pulse rectification. At the TRU level, 3-phase input power is provided to the transformer, which produces an isolated 9-phase or 12-phase output. The isolated multi-phase transformer output may be fed into a bridge rectifier, which converts AC to DC. DC output voltage may be determined by AC input voltage and transformer turns ratio.

IPC Classes  ?

• H01F 27/28 - CoilsWindingsConductive connections
• H01F 30/04 - Fixed transformers not covered by group having two or more secondary windings, each supplying a separate load, e.g. for radio set power supplies
• H01F 30/12 - Two-phase, three-phase or polyphase transformers
• H01F 30/14 - Two-phase, three-phase or polyphase transformers for changing the number of phases

Abstract

Asyrnmetric AC to DC autotransformer for turboelectric propulsion, and
associated systerns and
rnethods are described herein. In one ernbodiment, an asymmetric AC to DC
autotransformer
includes: a first coil, a second coil and a third coil of a delta winding Each
coil is energized at its
corresponding input phase. A first plurality of correction windings coupled to
the first coil, a second
plurality of correction windings coupled to the second coil, and a third
plurality of correction
windings coupled to the third coil. A bridge rectifier having a plurality of
rectifiers is coupled to
respective individual correction windings. Phases of the individual correction
windings are
asymmetric such that individual phase voltages are controlled relative to the
opposite input phase.
Voltages are unbalanced relative to neutral.

IPC Classes  ?

• H01F 30/02 - Auto-transformers
• H01F 30/12 - Two-phase, three-phase or polyphase transformers

Abstract

Asymmetric AC to DC autotransformer for turboelectric propulsion, and associated systems and methods are described herein. In one embodiment, an asymmetric AC to DC autotransformer includes: a first coil, a second coil and a third coil of a delta winding Each coil is energized at its corresponding input phase. A first plurality of correction windings coupled to the first coil, a second plurality of correction windings coupled to the second coil, and a third plurality of correction windings coupled to the third coil. A bridge rectifier having a plurality of rectifiers is coupled to respective individual correction windings. Phases of the individual correction windings are asymmetric such that individual phase voltages are controlled relative to the opposite input phase. Voltages are unbalanced relative to neutral.

IPC Classes  ?

• H01F 30/02 - Auto-transformers
• H01F 30/12 - Two-phase, three-phase or polyphase transformers
• H01F 27/28 - CoilsWindingsConductive connections
• H01F 27/29 - TerminalsTapping arrangements
• H01F 30/06 - Fixed transformers not covered by group characterised by the structure

Abstract

The aircraft tire pressure resonant loop link assembly electromagnetically couples a magnetic field between a wheel axle electromagnetic adapter transformer primary coil and a tire pressure sensor receiver coil for powering a tire pressure sensor, and includes a pair of spaced apart electrically conductive connecting arms, a single electrically conductive primary loop electrically connected to first ends of the connecting arms mounted adjacent to a secondary tire pressure sensor coil, and a circuit including a resonant tuning capacitor and a secondary coil with one or more electrically conductive loops at second ends of the connecting arms. The tire pressure sensor coil pair includes a transformer core, and secondary resonant coil pair also includes a transformer core.

IPC Classes  ?

• B60C 23/04 - Signalling devices actuated by tyre pressure mounted on the wheel or tyre

Abstract

Cold check gas pressure readings for the landing gear tires of an aircraft are obtained automatically during normal operation of the aircraft. The automated system (S1, e.g.) includes monitoring aircraft data to determine that the aircraft is at rest on the ground (32,345,36), and electronically monitoring the tire pressure (24). When predetermined cold check conditions have been met; the tire pressure values are automatically stored with a timestamp (38) for later access by a user.

IPC Classes  ?

• B60C 23/04 - Signalling devices actuated by tyre pressure mounted on the wheel or tyre

Abstract

The aircraft tire pressure loop link is formed of first and second single metal loops connected by parallel spaced apart metal shafts, and provides for coupling a magnetic field between a wheel hub coil and a tire pressure sensor coil to provide electromagnetic communication between a control unit connect to the wheel hub coil and a tire pressure sensor connected to the tire pressure sensor coil. The current induced in the first single metal loop travels the distance from the edge of the wheel axle coil to the periphery of the of the wheel rim to the second single metal loop, which generates the flux in the tire pressure sensor receiver coil necessary to power the tire pressure sensor.

IPC Classes  ?

• B60C 23/04 - Signalling devices actuated by tyre pressure mounted on the wheel or tyre

Abstract

A passive RFID transponder sensor system includes a sensor assembly having a focused field transponder antenna with a highly magnetically permeable transponder antenna stem, and a reader antenna with an electrical reader coil generating a magnetic field having magnetic flux extending between the reader antenna and a sensor assembly. The electrical transponder coil and the electrical reader coil are coupled by the magnetic field, so that information can be transferred to and from the sensor assembly through the magnetic field by which the electrical transponder coil and the electrical reader coil are coupled.

IPC Classes  ?

• H01Q 7/08 - Ferrite rod or like elongated core
• B60C 23/00 - Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehiclesArrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanksTyre cooling arrangements

Abstract

The aircraft tire pressure loop link is formed of first and second single metal loops connected by parallel spaced apart metal shafts, and provides for coupling a magnetic field between a wheel hub coil and a tire pressure sensor coil to provide electromagnetic communication between a control unit connect to the wheel hub coil and a tire pressure sensor connected to the tire pressure sensor coil. The current induced in the first single metal loop travels the distance from the edge of the wheel axle coil to the periphery of the of the wheel rim to the second single metal loop, which generates the flux in the tire pressure sensor receiver coil necessary to power the tire pressure sensor.

IPC Classes  ?

• B60C 23/04 - Signalling devices actuated by tyre pressure mounted on the wheel or tyre

Abstract

Three coils, each having several serial windings (A1-A4 or 5; B1-B4 or 5; C1-C4 or 5), have selected windings connected in a delta (A2-A4 or 5; B2-B4 or 5; C2-CR or 5). Input AC power is applied through outrigger windings (A1, B1, C1)at the delta apices (A, B, C). At least two strategically located, direct tap, natural output points (01-06; or 01, 02, 04, 05, 07, 08) are provided at each side of the delta. For 6-phase output, only the six natural output points (01-06) are required. For 9-phase output, an additional central output terminal (09, 06, 03) connects to each side of the delta through a stub winding (A6, B6, C6). The 6-phase or 9-phase output is passed to a rectifier circuit (R).

IPC Classes  ?

• H02M 11/00 - Power conversion systems not covered by the other groups of this subclass