Patents by Inventor Andrew Charlton Clothier
Andrew Charlton Clothier 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: 20240258845Abstract: A stator core for a brushless permanent magnet motor has a back, and first and second arms extending from the back. Each of the first and second arms has a first portion extending substantially orthogonally relative to the back, and a second portion obliquely angled relative to the first portion.Type: ApplicationFiled: July 12, 2022Publication date: August 1, 2024Applicant: Dyson Technology LimitedInventors: Chukwuma Junior IFEDI, Andrew Charlton CLOTHIER, Tuncay CELIK, Yu CHEN
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Patent number: 11668322Abstract: A turbomachine having a rotor assembly, a stator assembly and a toroidal inductor. The rotor assembly includes an impeller. The inductor is located between the impeller and the stator assembly, and is exposed to an airflow generated by or acting upon the impeller.Type: GrantFiled: April 27, 2016Date of Patent: June 6, 2023Assignee: Dyson Technology LimitedInventors: Andrew Charlton Clothier, Matthew John Childe
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Patent number: 11128198Abstract: An electric motor including: a frame; a rotor assembly including a magnet, a bearing assembly, an impeller, and a shaft; and a stator assembly including a stator core and a bobbin. The frame has an inner wall and an outer wall, the outer wall surrounds the inner wall and defines an annular channel between the inner wall and the outer wall, and diffuser vanes extend from the inner wall to the outer wall through the annular channel. The inner wall defines a bore for supporting the rotor assembly, and the outer wall defines a substantially cylindrical outer casing of the motor.Type: GrantFiled: December 12, 2016Date of Patent: September 21, 2021Inventors: Andrew Simeon Barnes, Nigel Youatt Dymond, Andrew Charlton Clothier
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Patent number: 11038385Abstract: A four-pole stator assembly including a bobbin assembly; and two c-shaped stator cores, each c-shaped stator core comprising a back and first and second pole arms extending from the back. The bobbin assembly includes first and second bobbin portions, each bobbin portion comprising two hollow bobbin arms, each bobbin arm defining a slot for receiving a pole arm, and a winding wound around each bobbin arm. The c-shaped stator cores are arranged such that each c-shaped stator core bridges across both bobbin portions with one of the first and second pole arms extending through a slot in the first bobbin portion, and the other of the first and second pole arms extending through a slot in the second bobbin portion, the pole arms being fixed in the slots by adhesive.Type: GrantFiled: December 12, 2016Date of Patent: June 15, 2021Assignee: Dyson Technology LimitedInventors: Nigel Youatt Dymond, Andrew Simeon Barnes, Andrew Charlton Clothier
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Patent number: 10855124Abstract: An electric motor comprising: a stator assembly; a rotor assembly; and a support body. The stator assembly comprises a plurality of stator elements, and the rotor assembly comprises a shaft to which is mounted at least a first and a second bearing mounted either side of a permanent magnet. The support body comprises an elongate central part, and first and second bearing seats positioned axially at opposite ends of the elongated central part to each other, and the elongate central part defines a plurality of openings each configured to receive one of the plurality of stator elements.Type: GrantFiled: June 19, 2018Date of Patent: December 1, 2020Assignee: Dyson Technology LimitedInventors: Andrew Charlton Clothier, Gary Francis King
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Publication number: 20180366999Abstract: An electric motor comprising: a stator assembly; a rotor assembly; and a support body. The stator assembly comprises a plurality of stator elements, and the rotor assembly comprises a shaft to which is mounted at least a first and a second bearing mounted either side of a permanent magnet. The support body comprises an elongate central part, and first and second bearing seats positioned axially at opposite ends of the elongated central part to each other, and the elongate central part defines a plurality of openings each configured to receive one of the plurality of stator elements.Type: ApplicationFiled: June 19, 2018Publication date: December 20, 2018Applicant: Dyson Technology LimitedInventors: Andrew Charlton CLOTHIER, Gary Francis KING
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Patent number: 9859824Abstract: An AC/AC boost converter comprising input terminals, output terminals, an inductor, a bridge arm comprising a pair of bi-directional switches, a capacitor and a control circuit for controlling the switches. The bridge arm and the capacitor are connected in parallel across the output terminals. The inductor has a first end connected to one of the input terminals and a second end connected to one of an end and a junction of the bridge arm, the junction being located between the two switches. Another of the input terminals is then connected to the other of the end and the junction of the bridge arm. An AC power supply supplies an AC input voltage at the input terminals, and the control circuit controls the switches of the bridge arm such that an AC output voltage is supplied at the output terminals, the AC output voltage being greater than the AC input voltage.Type: GrantFiled: October 7, 2014Date of Patent: January 2, 2018Assignee: Dyson Technology LimitedInventors: Stephen Greetham, Andrew Charlton Clothier
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Patent number: 9848745Abstract: A product that includes a compressor, a housing and a vibration isolation mount located between the compressor and the housing. The compressor includes an impeller, a first inlet located upstream of the impeller, a first outlet located downstream of the impeller, a second inlet located downstream of the first outlet, and a second outlet located downstream of the second inlet. During operation, fluid enters the compressor via the first inlet and exits the compressor via the first outlet. The mount creates a restriction between the compressor and the housing that causes fluid exiting the first outlet to re-enter the compressor via the second inlet.Type: GrantFiled: May 2, 2014Date of Patent: December 26, 2017Assignee: Dyson Technology LimitedInventors: Robert Stanley Hill, Andrew Charlton Clothier
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Patent number: 9742318Abstract: A method of controlling an electric machine, the method comprising storing a plurality of power maps, each power map comprising control values for driving the electric machine at different power, and selecting a power map in response to an input signal. Additionally, a control system for an electric machine, and a product incorporating the control system and electric machine.Type: GrantFiled: March 29, 2010Date of Patent: August 22, 2017Assignee: DYSON TECHNOLOGY LIMITEDInventors: Andrew Charlton Clothier, Tuncay Celik
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Publication number: 20170170693Abstract: A four-pole stator assembly including a bobbin assembly; and two c-shaped stator cores, each c-shaped stator core comprising a back and first and second pole arms extending from the back. The bobbin assembly includes first and second bobbin portions, each bobbin portion comprising two hollow bobbin arms, each bobbin arm defining a slot for receiving a pole arm, and a winding wound around each bobbin arm. The c-shaped stator cores are arranged such that each c-shaped stator core bridges across both bobbin portions with one of the first and second pole arms extending through a slot in the first bobbin portion, and the other of the first and second pole arms extending through a slot in the second bobbin portion, the pole arms being fixed in the slots by adhesive.Type: ApplicationFiled: December 12, 2016Publication date: June 15, 2017Applicant: Dyson Technology LimitedInventors: Nigel Youatt DYMOND, Andrew Simeon BARNES, Andrew Charlton CLOTHIER
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Publication number: 20170170709Abstract: An electric motor including: a frame; a rotor assembly including a magnet, a bearing assembly, an impeller, and a shaft; and a stator assembly including a stator core and a bobbin. The frame has an inner wall and an outer wall, the outer wall surrounds the inner wall and defines an annular channel between the inner wall and the outer wall, and diffuser vanes extend from the inner wall to the outer wall through the annular channel. The inner wall defines a bore for supporting the rotor assembly, and the outer wall defines a substantially cylindrical outer casing of the motor.Type: ApplicationFiled: December 12, 2016Publication date: June 15, 2017Applicant: Dyson Technology LimitedInventors: Andrew Simeon BARNES, Nigel Youatt DYMOND, Andrew Charlton CLOTHIER
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Patent number: 9564778Abstract: A stator core that includes a pair of poles separated by an air gap. Each pole includes a first side adjacent the air gap and a second opposite side remote from the air gap. A pole arc is formed in the first side and an arcuate mounting recess is formed in the second side of each pole. Additionally, an electric machine that includes the stator core.Type: GrantFiled: February 19, 2010Date of Patent: February 7, 2017Assignee: Dyson Technologies LimitedInventors: Howard Charles Fulford, Stephen Greetham, Andrew Charlton Clothier, Matthew John Childe
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Publication number: 20160261214Abstract: An AC/AC boost converter comprising input terminals, output terminals, an inductor, a bridge arm comprising a pair of bi-directional switches, a capacitor and a control circuit for controlling the switches. The bridge arm and the capacitor are connected in parallel across the output terminals. The inductor has a first end connected to one of the input terminals and a second end connected to one of an end and a junction of the bridge arm, the junction being located between the two switches. Another of the input terminals is then connected to the other of the end and the junction of the bridge arm. An AC power supply supplies an AC input voltage at the input terminals, and the control circuit controls the switches of the bridge arm such that an AC output voltage is supplied at the output terminals, the AC output voltage being greater than the AC input voltage.Type: ApplicationFiled: October 7, 2014Publication date: September 8, 2016Applicant: DYSON TECHNOLOGY LIMITEDInventors: Stephen GREETHAM, Andrew Charlton CLOTHIER
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Publication number: 20160238031Abstract: A turbomachine having a rotor assembly, a stator assembly and a toroidal inductor. The rotor assembly includes an impeller. The inductor is located between the impeller and the stator assembly, and is exposed to an airflow generated by or acting upon the impeller.Type: ApplicationFiled: April 27, 2016Publication date: August 18, 2016Applicant: Dyson Technology LimitedInventors: Andrew Charlton CLOTHIER, Matthew John CHILDE
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Patent number: 9410442Abstract: A turbomachine having a rotor assembly, a stator assembly and a toroidal inductor. The rotor assembly includes an impeller. The inductor is located between the impeller and the stator assembly, and is exposed to an airflow generated by or acting upon the impeller.Type: GrantFiled: August 24, 2012Date of Patent: August 9, 2016Assignee: Dyson Technology LimitedInventors: Andrew Charlton Clothier, Matthew John Childe
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Patent number: 9369011Abstract: An electric machine that includes a permanent-magnet rotor and a stator. The stator includes a plurality of poles, each pole having a leading edge and a trailing edge relative to the direction of rotation of the rotor. The leading edge of each pole is thicker than the trailing edge in a direction normal to the rotational axis of the rotor.Type: GrantFiled: February 17, 2010Date of Patent: June 14, 2016Assignee: Dyson Technology LimitedInventors: Stephen Greetham, Andrew Charlton Clothier
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Patent number: 9301665Abstract: A vacuum cleaner that includes a suction source, a cleaner head, and a controller. The suction source includes an impeller and a first motor for driving the impeller, and the cleaner head includes an agitator and a second motor for driving the agitator. The controller is configured to generate control signals for controlling simultaneously the excitation of the first motor and the second motor.Type: GrantFiled: June 13, 2014Date of Patent: April 5, 2016Assignee: Dyson Technology LimitedInventors: Andrew Charlton Clothier, James Douglas Chisholm
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Publication number: 20160028334Abstract: A drive circuit for a brushless motor comprising power lines for carrying an AC voltage, an inverter, and a controller. Each leg of the inverter is connected to a winding of the motor and comprises one or more bi-directional switches. The controller can output control signals that cause a pair of switches to conduct in one direction during the positive half-cycle of the AC voltage, and to conduct in the opposite direction during the negative half-cycle of the AC voltage. Alternatively, The controller can output control signals that cause a first pair of switches to conduct during the positive half-cycle of the AC voltage and a second pair of switches to conduct during the negative half-cycle of the AC voltage such that the winding is excited in the same direction irrespective of the polarity of the AC voltage.Type: ApplicationFiled: March 10, 2014Publication date: January 28, 2016Applicant: DYSON TECHNOLOGY LIMITEDInventors: Stephen GREETHAM, Andrew Charlton CLOTHIER
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Patent number: 9169843Abstract: A turbomachine that includes a housing and a circuit assembly. The housing includes an inlet for admitting a working airflow and a flange that extends from the inlet. The circuit assembly includes a circuit board and an electrical component having a heat sink. The circuit assembly is located within the housing such that the flange extends beyond the circuit board and the heat sink extends beyond the flange.Type: GrantFiled: August 24, 2012Date of Patent: October 27, 2015Assignee: Dyson Technology LimitedInventors: Andrew Charlton Clothier, Roger Michael Dawe
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Patent number: 8988021Abstract: A method of controlling a brushless motor that includes rectifying an alternating voltage to provide a rectified voltage having a ripple of at least 50%, exciting a winding of the motor with the rectified voltage, and performing a first process or a second process in response to current in the winding exceeding a threshold that is proportional to the rectified voltage. The first process includes freewheeling the winding, while the second process includes continuing to excite the winding for an overrun period and freewheeling the winding at the end of the overrun period. Additionally, a control system that implements the method, and a motor system that incorporates the control system.Type: GrantFiled: April 8, 2011Date of Patent: March 24, 2015Assignee: Dyson Technology LimitedInventors: Andrew Charlton Clothier, Stephen Greetham, Nicholas Dalibor Tuftnell