Newage International Limited

Cummins Generator Technologies Limited

Lawrence Haydock

Nazar Al-Khayat

Neil Brown

Cleveland Mills

Wlodzimierz Koczara

Jeremy Owen Dowdall

Stephen Frederick Allen

John Ernest Clive Bean

Denis Hedley Dalby

Jawad Al-Tayie

Robert Pawel Dziuba

George Williamson Laird

Jaroslaw Leonarski

Edward Spooner

Neil Lovell Brown

A rotor disc assemblyfor an AC machine includes a rotor disc, permanent magnetsand a spider. The rotor dischas a circumferential lipprojecting from a surface thereof. The permanent magnetsare positioned in a circular array on the surface of the rotor disc, with constant angular pitch, and so as to lie against the lip. The spider includes an annular base portion, with a plurality of armsprojecting radially outwards therefrom. The spideris fixed to the surface of the rotor discsuch that each armis between and abuts a respective juxtaposed pair of the permanent magnets. The armsand the membersare each provided with cooperating wedge-shaped cross sections such that each armconstrains the respective two permanent magnetsboth axially and tangentially on the surface of the rotor disc.

Method of fixing unmagnetized magnetizable members to a rotor disc and a rotor disc

A generating set includes an engie driven generator (PGM) having two sets of stator windings (Ga and Gb). A bi-directional AC/DC converter (BCo) has its AC input connected to a junction between the two sets of stator windings (Ga and Gb) and its DC input connected to a number of the generator (PGM) is converted into an intermediate DC link by a convertor (Col) to produce an output for a load Lo. In normal operation of the system, an emf generated in one (Ga) of the sets of stator windings is rectified by the bi-direcitonal converter (BCo) to charge the energy storages (ESI-ESN) whilst the remainder of the generator output is fed through the converter to the load (Lo). In the event of a stepped increase in the load demand, the bi-directional converter (BCo) is operated to feed energy from the storage devices (ESI-ESN) to the stator windings (Ga) of the generator (PGM) to impart a driving torque to the generator rotor to accelerte the rotor to meet the increased load demand. The energy stored in the storages devices (ESI-ESN) could be used to start the engine (EN).

Electrical machine and an electrical power generating system

A toroidal AC generator includes an outer casing and an annular stator core of ferromagnetic material which is encased in a hollow annular cover of plastics material and which is fixed to the casing between the discs of a twin disc rotor. Each rotor disc carries a circular array of alternately polarised permanent magnets which face the stator core. The hollow annular cover is a two-part moulding and is formed of radially inner and outer ring portions which are joined by circular arrays of radial ribs which extend across the opposed radial faces of the annular core and form open-ended radial passages for the electrical phase windings which are wound around the cover. The ribs project radially beyond the radially outer ring portion and form hooks around which a winding may be retained temporarily during winding.

Toroidal electrical machine and an annular winding carrier therefor

An electric power generating set which automatically varies its speed to match load variations at any time includes an engine driven generator G which provides a positive, Ga and a negative, Gb AC output voltage each of which is rectified by a respective rectifier Re , Re . Each rectifier Re ,Re has one terminal connected to a common neutral line N. The DC output voltage of each rectifier Re , Re is boosted in a respective booster circuit which also has one terminal connected to the neutral line N. The combined output of the two booster circuits, Va&plus;Vb is fed to an Inverter IN which converts it to the AC power output of the generating set. A DC load current between the booster circuits and the inverter IN is monitored and used to provide a speed demand feedback signal Srs to the speed control of the engine EN. The inverter IN is controlled so that the voltage and frequency of the AC power output of the generating set are reduced in response to a fall in the intermediate DC voltage Va&plus;Vb that is fed to the inverter IN and which is monitored by a voltage sensor Vsab.

AC power generating system

A generator or a 3-phase motor is arranged to provide multipolar permanent magnet excitation in combination with multipolar reluctance distribution wherein different numbers of poles are used for the permanent magnet excitation and for the reluctance distribution so that the principal working flux has a finite waveform. An annular rotor rotates about a cruciform stator. The magnets are buried in pole pieces of the stator so they converge radially inwardly with a triangular pole piece between them. Each pole piece is joined to the remainder of the stator by a bridge piece. The inner periphery of the rotor is formed as a circumferential array of teeth separated by recesses. The rotor may be within an annular stator or the machine may be linear.

Alternating current machine

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Peterborough, United Kingdom

Lawrence Haydock