Patents by Inventor John James Anthony Cullen
John James Anthony Cullen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10487241Abstract: A method of encapsulating an electrical winding in an encapsulant composition. The method includes: (i) providing an electrically insulated wire; (ii) applying the encapsulation composition to the electrically insulated wire to encapsulate the wire; and (iii) winding a further layer of wire around the encapsulated wire. The electrical encapsulant composition includes a silica containing inorganic-organic nano-hybrid matrix, and particles of refractory ceramic suspended in the inorganic-organic nano-hybrid matrix.Type: GrantFiled: October 13, 2017Date of Patent: November 26, 2019Assignee: ROLLS-ROYCE plcInventors: Graham Philip Bruce, John James Anthony Cullen, Stephen Mark Husband, Yongxin Pang, Simon Hodgson
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Patent number: 10378445Abstract: The present application discloses a fuel system for a gas turbine engine. The engine includes a main alternating current electrical generator driven by an engine shaft such that the electrical output frequency of the electrical generator varies in dependence on shaft rotational speed. The fuel system includes a variable flow fuel pump for providing a fuel flow to the engine, a frequency and/or voltage controller configured to provide electrical power having at least one of a predetermined output frequency and a predetermined voltage, and a variable speed electric motor configured to drive the fuel pump. The electric motor includes an induction motor having a stator and at least a first rotor, the stator having first and second sets of stator windings. Each set of stator windings is configured to impart a torque on the rotor in use.Type: GrantFiled: April 23, 2015Date of Patent: August 13, 2019Assignee: ROLLS-ROYCE plcInventors: Huw Llewelyn Edwards, Stephen Mark Husband, John James Anthony Cullen
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Publication number: 20180037771Abstract: An encapsulant composition comprises a silica containing inorganic-organic nano-hybrid matrix, particles of refractory ceramics suspended in the inorganic-organic nano-hybrid matrix, and, optionally, glass or ceramic fibres. The encapsulant may also contain ceramic coated metallic particles, and in some embodiments, a solvent or binder. The formulations can include a solvent, which may be removed during a curing process, or may be solvent-less.Type: ApplicationFiled: October 13, 2017Publication date: February 8, 2018Applicant: ROLLS-ROYCE plcInventors: Graham Philip BRUCE, John James Anthony CULLEN, Stephen Mark HUSBAND, Yongxin PANG, Simon HODGSON
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Stator winding arrangement for an electrical machine having series connected short and long windings
Patent number: 9853512Abstract: Described is an electrical machine, including: a rotor having a magnetic flux source mounted thereto; a stator winding arrangement having a first set of electrical connections to provide a first output channel, and a second set of electrical connections to provide a second output channel, the first and second channels being electrically out of phase, wherein the stator winding arrangement is constructed from a plurality of winding portions which are connected in electrical series.Type: GrantFiled: July 16, 2014Date of Patent: December 26, 2017Assignee: ROLLS-ROYCE plcInventors: David Reginald Trainer, Konstantinos Kampisios, Omar Fadhel Jasim, Ellis Fui Hen Chong, John James Anthony Cullen -
Publication number: 20160109133Abstract: A fuel system for a gas turbine engine, the gas turbine engine including a combustor having a pilot fuel injector and a main fuel injector, the fuel system including first and second variable flow fuel pumps configured to provide metered fuel flow to the pilot injector, and the main injector respectively; first and second variable speed electric motors configured to drive respective first and second fuel pumps; wherein each of the electric motors includes a polyphase motor including a stator having concentrated windings.Type: ApplicationFiled: October 6, 2015Publication date: April 21, 2016Inventors: Huw Llewelyn EDWARDS, Timothy John SCANLON, Yi WANG, John James Anthony CULLEN
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Publication number: 20150315980Abstract: The present application discloses a fuel system for a gas turbine engine. The engine includes a main alternating current electrical generator driven by an engine shaft such that the electrical output frequency of the electrical generator varies in dependence on shaft rotational speed. The fuel system includes a variable flow fuel pump for providing a fuel flow to the engine, a frequency and/or voltage controller configured to provide electrical power having at least one of a predetermined output frequency and a predetermined voltage, and a variable speed electric motor configured to drive the fuel pump. The electric motor includes an induction motor having a stator and at least a first rotor, the stator having first and second sets of stator windings. Each set of stator windings is configured to impart a torque on the rotor in use.Type: ApplicationFiled: April 23, 2015Publication date: November 5, 2015Inventors: Huw Llewelyn EDWARDS, Stephen Mark HUSBAND, John James Anthony CULLEN
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Publication number: 20150035395Abstract: Described is an electrical machine, including: a rotor having a magnetic flux source mounted thereto; a stator winding arrangement having a first set of electrical connections to provide a first output channel, and a second set of electrical connections to provide a second output channel, the first and second channels being electrically out of phase, wherein the stator winding arrangement is constructed from a plurality of winding portions which are connected in electrical series.Type: ApplicationFiled: July 16, 2014Publication date: February 5, 2015Inventors: David Reginald TRAINER, Konstantinos KAMPISIOS, Omar Fadhel JASIM, Ellis Fui Hen CHONG, John James Anthony CULLEN
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Patent number: 8908336Abstract: A fault tolerant electrical machine including: a plurality of phases; a detector arranged to detect a fault in at least one of the phases; and a controller arranged to intentionally cause a fault in at least one other of the phases such that the vector sum of the second harmonic power vectors of the remaining phases is zero.Type: GrantFiled: January 5, 2011Date of Patent: December 9, 2014Assignee: Rolls-Royce PLCInventors: John James Anthony Cullen, Stephen Andrew Long
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Publication number: 20140342165Abstract: An encapsulant composition has a silica containing inorganic-organic nano-hybrid matrix, particles of refractory ceramics suspended in the inorganic-organic nano-hybrid matrix, and, optionally, glass or ceramic fibres. The encapsulant may also contain ceramic coated metallic particles, and in some embodiments, a solvent or binder.Type: ApplicationFiled: April 30, 2014Publication date: November 20, 2014Applicant: ROLLS-ROYCE PLCInventors: Graham Philip BRUCE, John James Anthony CULLEN, Stephen Mark HUSBAND, Yongxin PANG, Simon HODGSON
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Patent number: 8487500Abstract: A component of an electric machine 46, the component comprising a core 10; two or more teeth 14 extending radially therefrom; at least one electromagnetic winding 12, each winding 12 around at least one of the teeth 14; wherein the core 10 having a cooling arrangement including at least one cooling insert 48 located between adjacent windings 12 and whereby in use a cooling fluid being arranged to flow through the at least one cooling insert 48 to facilitate heat transfer and dissipation from the electromagnetic windings 12. The cooling inserts providing improved cooling, structural support to the windings, and electrical insulation between the windings and the core.Type: GrantFiled: January 23, 2008Date of Patent: July 16, 2013Assignee: Rolls-Royce PLCInventors: John James Anthony Cullen, David James Powell
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Publication number: 20120275068Abstract: A fault tolerant electrical machine including: a plurality of phases; a detector arranged to detect a fault in at least one of the phases; and a controller arranged to intentionally cause a fault in at least one other of the phases such that the vector sum of the second harmonic power vectors of the remaining phases is zero.Type: ApplicationFiled: January 5, 2011Publication date: November 1, 2012Applicant: ROLLS-ROYCE PLCInventors: John James Anthony Cullen, Stephen Andrew Long
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Patent number: 7830105Abstract: Embedding electrical machines in gas turbine engines has particular advantages by avoiding the need to provide mechanical connections. However, electrical machines such as switched reluctance electrical machines require relatively large electrical capacitors to accommodate and filter voltage variations in the phases of the electrical machine. Generally, the electrical machine will have a motoring period or generating period with a spacer period between. By injecting electrical current as electrical power in the spacer period, there is limited effect upon net torque within the electrical machine or electrical power generation. However, such stored electrical power in an inductive winding element of the electrical machine augments power pulses provided by a power source incorporating an electrical capacitor. In such circumstances, a smaller sized electrical capacitor can be used.Type: GrantFiled: July 21, 2008Date of Patent: November 9, 2010Assignee: Rolls-Royce PLCInventors: David Reginald Trainer, John James Anthony Cullen, Stephen Andrew Long
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Patent number: 7612463Abstract: Within a power generating arrangement 1 it is typically necessary to provide a coupling with an electrical power distribution cable 5. Previously this was sometimes achieved through use of brush gear and slip rings but such arrangements are subject to regular replacement for wear, maintenance and also there is a requirement to control humidity about the brush gear coupling. Alternatively, a system allowing an amount of rotation, limited by cable wind up was used. By providing a transformer in which windings 15, 16; 36, 37 are physically separated by an air gap 14, 39, but still induce voltage from variation in the magnetic flux, it is possible to create a power generating transfer transformer which can be rotated while driving electrical current for an external load.Type: GrantFiled: July 5, 2006Date of Patent: November 3, 2009Assignee: Rolls-Royce plcInventors: John James Anthony Cullen, Andrew Martin Rolt
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Publication number: 20090039652Abstract: Embedding electrical machines in gas turbine engines has particular advantages by avoiding the need to provide mechanical connections. However, electrical machines such as switched reluctance electrical machines require relatively large electrical capacitors to accommodate and filter voltage variations in the phases of the electrical machine. Generally, the electrical machine will have a motoring period or generating period with a spacer period between. By injecting electrical current as electrical power in the spacer period, there is limited effect upon net torque within the electrical machine or electrical power generation. However, such stored electrical power in an inductive winding element of the electrical machine augments power pulses provided by a power source incorporating an electrical capacitor. In such circumstances, a smaller sized electrical capacitor can be used.Type: ApplicationFiled: July 21, 2008Publication date: February 12, 2009Applicant: ROLLS-ROYCE PLCInventors: David Reginald Trainer, John James Anthony Cullen, Stephen Andrew Long
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Patent number: 7215054Abstract: With an active magnetic bearing 1 there is a limit to the available rapidity of response to transient loadings upon a target or rotor 4. Thus, in accordance with the present invention, storage devices 25, 125, 225, 35 hold an electrical voltage VS significantly greater than the normal supply voltage V provided by a normal electrical source 22, 32. In such circumstances when a very large transient loading is detected on the bearing 1 a switch 26, 37 discharges the supply voltage VS across the coil 23, 33 in order that a more rapid increase and higher value inductance current IT is presented to the coil 22, 32 in response to that variable loading upon the target/rotor 24, 34. The electrical discharge from the storage device 25, 125, 225, 35 can be adjusted using the switch 26, 37 or mixing the storage devices 25, 125, 225, 35 as required for an appropriate discharge signal shape.Type: GrantFiled: September 29, 2006Date of Patent: May 8, 2007Assignee: Rolls-Royce plcInventors: John James Anthony Cullen, Cerith Davies, John Richard Webster
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Patent number: 7138739Abstract: With an active magnetic bearing 1 there is a limit to the available rapidity of response to transient loadings upon a target or rotor 4. Thus, in accordance with the present invention, storage devices 25, 125, 225, 35 hold an electrical voltage VS significantly greater than the normal supply voltage V provided by a normal electrical source 22, 32. In such circumstances when a very large transient loading is detected on the bearing 1 a switch 26, 37 discharges the supply voltage VS across the coil 23, 33 in order that a more rapid increase and higher value inductance current IT is presented to the coil 22, 32 in response to that variable loading upon the target/rotor 24, 34. The electrical discharge from the storage device 25, 125, 225, 35 can be adjusted using the switch 26, 37 or mixing the storage devices 25, 125, 225, 35 as required for an appropriate discharge signal shape.Type: GrantFiled: March 24, 2005Date of Patent: November 21, 2006Assignee: Rolls-Royce PLCInventors: John James Anthony Cullen, Cerith Davies, John Richard Webster