Patents by Inventor David Trainer
David Trainer 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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Publication number: 20240080594Abstract: A speaker can have a main body with a generally spheroidal shape, which can be supported standing on its end. The speaker can include a subwoofer that faces forward. A plurality of mid-range drivers can be distributed around the sub-woofer, facing generally forward and radially outward. A plurality of tweeters can be distributed around the sub-woofer, facing generally forward and generally outward. The outer housing portion of the speaker can be covered with a fabric material. A user interface ring 162 can be touch sensitive to receive input, and can have a plurality of lights that can be illuminated separately to convey information to the user.Type: ApplicationFiled: July 5, 2023Publication date: March 7, 2024Inventors: Timothy David Williamson, Peter Joseph Hamblin, Maximilian Vincent Wozniak, Robert James Wilson, Wilson E. Taylor, JR., Larry E. Hand, Mark Robert Westcott, Mark Edward Trainer, Ellie Rei Fukuda, Joel Robert Sietsema, Paul Michael Belanger, Matthew Patrick Lyons, Timothy Steven DeYoung, Werner Kirchmann, Ralph Wilhelm Hermann
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Patent number: 9490693Abstract: A power electronic converter for use in high voltage direct current power transmission and reactive power compensation comprises a plurality of switching elements interconnecting in use a DC network and one or more AC networks, the plurality of switching elements being controllable in use to facilitate power conversion between the AC and DC networks, wherein in use, the plurality of switching elements are controllable to form one or more short circuits within the power electronic converter so as to define one or more primary current flow paths, the or each primary current flow path including a respective one of the AC networks and the power electronic converter and bypassing the DC network.Type: GrantFiled: April 13, 2015Date of Patent: November 8, 2016Assignee: Alstom Technology Ltd.Inventors: David Trainer, Colin Charnock Davidson, Nnamdi Okaeme
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Patent number: 9455575Abstract: A voltage source converter for high voltage DC power transmission is disclosed. According to one aspect, the voltage source converter is connectable between a DC network and another electrical network to interconnect the DC network and the other electrical network. The voltage source converter includes a converter unit configured to convert power flowing between the DC network and the other electrical network and at least one fault unit. One or more of the fault units includes at least one fault module having a voltage source that is operable, in the event of a short circuit in a DC network connected to the voltage source converter, to produce a voltage that acts to reduce current flowing through the voltage source converter and the short circuit.Type: GrantFiled: July 31, 2009Date of Patent: September 27, 2016Assignee: Alstom Technology, Ltd.Inventors: David Trainer, Colin Donald Murray Oates, Colin Charnock Davidson, Robert Whitehouse
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Patent number: 9350269Abstract: A circuit for a hybrid voltage source converter suitable for high voltage DC power transmission and reactive power compensation. The circuit comprises an assembly of electrically interconnected elements (Elements 1 to 20) including a plurality of first elements (Elements 1 to 6) and a plurality of second elements (Elements 7 to 20). Each of the first and second elements is configurable to be bypassed, to be disconnected or to include a circuit arrangement of one or more electronic components to construct, in use, a hybrid voltage source converter including at least one first element and at least one second element and in which the circuit arrangement included in the or each first element is different to the circuit arrangement included in the or each second element.Type: GrantFiled: July 31, 2009Date of Patent: May 24, 2016Assignee: Alstom Technology Ltd.Inventors: William Crookes, David Trainer, Colin Donald Murray Oates, Colin Charnock Davidson
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Publication number: 20150214834Abstract: A power electronic converter for use in high voltage direct current power transmission and reactive power compensation comprises a plurality of switching elements interconnecting in use a DC network and one or more AC networks, the plurality of switching elements being controllable in use to facilitate power conversion between the AC and DC networks, wherein in use, the plurality of switching elements are controllable to form one or more short circuits within the power electronic converter so as to define one or more primary current flow paths, the or each primary current flow path including a respective one of the AC networks and the power electronic converter and bypassing the DC network.Type: ApplicationFiled: April 13, 2015Publication date: July 30, 2015Inventors: David Trainer, Colin Charnock Davidson, Nnamdi Okaeme
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Patent number: 9065299Abstract: A power electronic converter for use in high voltage direct current power transmission and reactive power compensation comprises a plurality of switching elements interconnecting in use a DC network and one or more AC networks, the plurality of switching elements being controllable in use to facilitate power conversion between the AC and DC networks, wherein in use, the plurality of switching elements are controllable to form one or more short circuits within the power electronic converter so as to define one or more primary current flow paths, the or each primary current flow path including a respective one of the AC networks and the power electronic converter and bypassing the DC network.Type: GrantFiled: June 18, 2010Date of Patent: June 23, 2015Assignee: Alstom Technology LTDInventors: David Trainer, Colin Charnock Davidson, Nnamdi Okaeme
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Patent number: 8934268Abstract: A power electronic converter for use in high voltage direct current power transmission and reactive power compensation which includes at least one converter limb including first and second DC terminals for connection in use to a DC network. The or each converter limb includes at least one first converter block and at least one second converter block connected between the first and second DC terminals. The or each first converter block includes a plurality of line-commutated thyristors and at least one first AC terminal for connection in use to an AC network. The or each second converter block includes at least one auxiliary converter including a plurality of self-commutated switching elements. The self-commutated switching elements are controllable in use to inject a voltage to modify a DC voltage presented to the DC side of the converter limb and/or modify an AC voltage and an AC current on the AC side of the power electronic converter.Type: GrantFiled: April 8, 2010Date of Patent: January 13, 2015Assignee: Alstom Technology LtdInventors: David Trainer, Andre Paulo Canelhas, Colin Charnock Davidson, Carl David Barker
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Patent number: 8879291Abstract: A multilevel voltage source converter for high voltage DC power transmission and reactive power compensation. The voltage source converter includes at least one phase element including a plurality of semiconductor switches to interconnect a DC voltage and an AC voltage. The voltage source converter also includes at least one auxiliary converter to act as a waveform synthesizer to modify the DC voltage presented to the DC side of the phase element.Type: GrantFiled: February 9, 2009Date of Patent: November 4, 2014Assignee: Alstom Technology Ltd.Inventors: David Trainer, Ruchira Withanage, Robert Whitehouse, Andrew Cross
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Patent number: 8867242Abstract: A voltage source converter is used in high voltage direct current power transmission and reactive power compensation. The voltage source converter includes first and second DC terminals for connection in use to a DC network, three phase elements and at least one auxiliary converter connected between the first and second DC terminals, each phase element including a plurality of primary switching elements and at least one AC terminal for connection in use to a respective phase of a multi-phase AC network, the plurality of primary switching elements being controllable in use to facilitate power conversion between the AC and DC networks, the or each auxiliary converter being operable in use to act as a waveform synthesizer to modify a first DC voltage presented to the DC network so as to minimize ripple in the DC voltage.Type: GrantFiled: April 15, 2010Date of Patent: October 21, 2014Assignee: Alstom Technology LtdInventors: Jonathan Charles Clare, Matteo Tomasini, David Trainer, Robert Whitehouse
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Patent number: 8861231Abstract: A voltage source converter comprising three phase elements defining a star connection in which a first end of each phase element is connected to a common junction; at least two converter limbs, each converter limb including first and second DC terminals for connection in use to a DC network and an AC terminal connected in series with a second end of a phase element, each converter limb defining first and second limb portions, including a chain-link converter, each chain-link converter including chain-link modules; and a third DC terminal connected to the common junction of the star connection to define an auxiliary connection, wherein in use a current is injected into the auxiliary connection to modify a voltage of each chain-link module in each limb portion.Type: GrantFiled: February 9, 2010Date of Patent: October 14, 2014Assignee: Alstom Technology LtdInventors: Andrew Cross, David Trainer, William Crookes
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Patent number: 8861234Abstract: A DC voltage source converter for use in high voltage DC power transmission comprising at least one chain-link converter connected between first and second DC terminals. The or each chain-link converter includes a chain of modules connected in series and each module including at least one pair of semiconductor switches connected in parallel with an energy storage device. The or each chain-link converter is operable when DC networks are connected to the first and second DC terminals to control switching of the modules to selectively charge or discharge the energy storage device of one or more of the modules, as required, to offset any difference in the DC voltage levels of the DC networks.Type: GrantFiled: June 15, 2009Date of Patent: October 14, 2014Assignee: Alstom Technology LtdInventors: David Trainer, Colin Davidson, Ruchira Withanage, Adrian Keitley, Robert Whitehouse
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Patent number: 8704498Abstract: A voltage source converter (10) for use in three-phase high voltage DC power transmission and reactive power compensation. The voltage source converter (10) comprises three converter limbs (12,14,16) connected in a bridge circuit arrangement wherein each of first and second converter limbs (12,14) includes a multilevel converter (18) and a third converter limb (16) includes a capacitor (20) on each side of a series AC phase connection (22). The multilevel converters (18) are controllable to synthesize waveforms at series AC phase connections (24,26) of the first and second converter limbs (12,14).Type: GrantFiled: June 15, 2009Date of Patent: April 22, 2014Assignee: Alstom Technology Ltd.Inventors: David Trainer, Ruchira Withanage, Robert S. Whitehouse
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Patent number: 8599591Abstract: A voltage source converter for use in high voltage DC power transmission and reactive power compensation. The voltage source converter comprises at least one converter limb including first and second DC terminals for connection in use to a DC network and an AC terminal for connection in use to an AC network. The or each converter limb defines first and second limb portions, each limb portion including at least one switching element connected in series with a chain-link converter between a respective one of the first and second DC terminals and the AC terminal. The switching elements of the first and second limb portions is operable to switch the respective chain-link converters in and out of circuit between the respective DC terminal and the AC terminal. The chain-link converters are operable to generate a voltage waveform at the AC terminal.Type: GrantFiled: June 22, 2009Date of Patent: December 3, 2013Assignee: Alstom Technology LtdInventors: William Crookes, David Trainer, Colin Oates
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Publication number: 20130208514Abstract: A power electronic converter for use in high voltage direct current power transmission and reactive power compensation comprises a plurality of switching elements interconnecting in use a DC network and one or more AC networks, the plurality of switching elements being controllable in use to facilitate power conversion between the AC and DC networks, wherein in use, the plurality of switching elements are controllable to form one or more short circuits within the power electronic converter so as to define one or more primary current flow paths, the or each primary current flow path including a respective one of the AC networks and the power electronic converter and bypassing the DC network.Type: ApplicationFiled: June 18, 2010Publication date: August 15, 2013Applicant: ALSTOM Technlogy LtdInventors: David Trainer, Colin Charnock Davidson, Nnamdi Okaeme
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Publication number: 20130208521Abstract: A power electronic converter for use in high voltage direct current power transmission and reactive power compensation which comprises at least one converter limb including first and second DC terminals for connection in use to a DC network, the or each converter limb including at least one first converter block, and at least one second converter block connected between the first and second DC terminals; the or each first converter block including a plurality of line-commutated thyristors and at least one first AC terminal for connection in use to an AC network, the or each second converter block including, at least one auxiliary converter including a plurality of self-commutated switching elements; wherein the self-commutated switching elements are controllable in use to inject a voltage to modify a DC voltage presented to the DC side of the converter limb and/or modify an AC voltage and an AC current on the AC side of the power electronic converter.Type: ApplicationFiled: April 8, 2010Publication date: August 15, 2013Applicant: ALSTOM TECHNOLOGY LTD.Inventors: David Trainer, Andre Paulo Canelhas, Colin Charnock Davidson, Carl David Barker
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Publication number: 20130182467Abstract: A voltage source converter comprising three phase elements defining a star connection in which a first end of each phase element is connected to a common junction; at least two converter limbs, each converter limb including first and second DC terminals for connection in use to a DC network and an AC terminal connected in series with a second end of a phase element, each converter limb defining first and second limb portions, including a chain-link converter, each chain-link converter including chain-link modules; and a third DC terminal connected to the common junction of the star connection to define an auxiliary connection, wherein in use a current is injected into the auxiliary connection to modify a voltage of each chain-link module in each limb portion.Type: ApplicationFiled: February 9, 2010Publication date: July 18, 2013Applicant: Alstom Technology Ltd.Inventors: Andrew Cross, David Trainer, William Crookes
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Publication number: 20130128629Abstract: A voltage source converter is used in high voltage direct current power transmission and reactive power compensation. The voltage source converter comprises first and second DC terminals for connection in use to a DC network, three phase elements and at least one auxiliary converter connected between the first and second DC terminals, each phase element including a plurality of primary switching elements and at least one AC terminal for connection in use to a respective phase of a multi-phase AC network, the plurality of primary switching elements being controllable in use to facilitate power conversion between the AC and DC networks, the or each auxiliary converter being operable in use to act as a waveform synthesizer to modify a first DC voltage presented to the DC network so as to minimise ripple in the DC voltage.Type: ApplicationFiled: April 15, 2010Publication date: May 23, 2013Applicant: ALSTOM TECHNOLOGY LTDInventors: Jonathan Charles Clare, Matteo Tomasini, David Trainer, Robert Whitehouse
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Publication number: 20130119970Abstract: A DC voltage source converter for use in high voltage DC power transmission comprising at least one chain-link converter connected between first and second DC terminals. The or each chain-link converter includes a chain of modules connected in series and each module including at least one pair of semiconductor switches connected in parallel with an energy storage device. The or each chain-link converter is operable when DC networks are connected to the first and second DC terminals to control switching of the modules to selectively charge or discharge the energy storage device of one or more of the modules, as required, to offset any difference in the DC voltage levels of the DC networks.Type: ApplicationFiled: June 15, 2009Publication date: May 16, 2013Applicant: ALSTOM Technology LtdInventors: David Trainer, Colin Davidson, Ruchira Withanage, Adrian Keitley, Robert Whitehouse
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Publication number: 20120182771Abstract: A voltage source converter for high voltage DC power transmission is disclosed. According to one aspect, the voltage source converter is connectable between a DC network and another electrical network to interconnect the DC network and the other electrical network. The voltage source converter includes a converter unit configured to convert power flowing between the DC network and the other electrical network and at least one fault unit. One or more of the fault units includes at least one fault module having a voltage source that is operable, in the event of a short circuit in a DC network connected to the voltage source converter, to produce a voltage that acts to reduce current flowing through the voltage source converter and the short circuit.Type: ApplicationFiled: July 31, 2009Publication date: July 19, 2012Inventors: David Trainer, Colin Donald Murray Oates, Colin Charnock Davidson, Robert Whitehouse
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Publication number: 20120170338Abstract: A voltage source converter (10) for use in three-phase high voltage DC power transmission and reactive power compensation. The voltage source converter (10) comprises three converter limbs (12,14,16) connected in a bridge circuit arrangement wherein each of first and second converter limbs (12,14) includes a multilevel converter (18) and a third converter limb (16) includes a capacitor (20) on each side of a series AC phase connection (22). The multilevel converters (18) are controllable to synthesize waveforms at series AC phase connections (24,26) of the first and second converter limbs (12,14).Type: ApplicationFiled: June 15, 2009Publication date: July 5, 2012Inventors: David Trainer, Ruchira Withanage, Robert Whitehouse