Patents by Inventor Siavash Sadeghi
Siavash Sadeghi 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: 11716002Abstract: A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.Type: GrantFiled: October 15, 2021Date of Patent: August 1, 2023Assignee: RESMED MOTOR TECHNOLOGIES INC.Inventors: Aleksandr S. Nagorny, Siavash Sadeghi, David James Fleming, Michael Bruce Moir
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Patent number: 11646618Abstract: A multi-phase electric machine may include a stator, and a rotor for rotating within the stator, the rotor including poles having combination magnet pieces with varying strengths and dimensions creating a non-sinusoidal back EMF. In one aspect, a multi-phase electric machine may include a stator, and a rotor for spinning within the stator, the rotor includes a plurality of poles having magnet assemblies includes at least a low strength magnet and a high strength magnet therein for creating a non-sinusoidal back EMF. In other aspects, a multi-phase electric machine of the present disclosure includes a stator, and a rotor for spinning within the stator, the rotor including a plurality of poles having magnet assemblies includes at least a first magnet and second magnet therein for creating a non-sinusoidal back EMF wherein a strength ratio of the first magnet and second magnet greater than the absolute value of 1.Type: GrantFiled: October 30, 2019Date of Patent: May 9, 2023Assignee: Optiphase Drive Systems, Inc.Inventors: Siavash Sadeghi, Arash Hassanpour Isfahani
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Patent number: 11597411Abstract: A magnetic levitation train system with an asymmetrical power distribution is provided, having a train which is moved through a track that is at least partly located within an airless tube, the track having at least two stations, having each section of the track between two correlative stations the following zones: an acceleration zone located at the beginning of the section, having a plurality of consecutive winding segments electrically connected to each other and to a current supply, a deceleration zone, comprising a plurality of consecutive winding segments electrically connected to each other and to a current supply, and a cruise zone in which the train is moved on a cruise speed, located between the acceleration zone and the deceleration zone, having a plurality of winding segments electrically connected to a current supply, and comprising a plurality of empty spaces between some of the winding segments.Type: GrantFiled: September 26, 2019Date of Patent: March 7, 2023Assignee: HYPERLOOP TRANSPORTATION TECHNOLOGIES, INC.Inventors: Amir Babazadeh, Siavash Sadeghi, Andrea La Mendola
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Publication number: 20220037972Abstract: A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.Type: ApplicationFiled: October 15, 2021Publication date: February 3, 2022Applicant: RESMED MOTOR TECHNOLOGIES INC.Inventors: Aleksandr S. Nagorny, Siavash Sadeghi, David James Fleming, Michael Bruce Moir
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Patent number: 11207480Abstract: A method of a control system controls an inductance motor in a device that may include an impeller using a pressure compensation control system. The control system may be implemented in a respiratory pressure therapy device. The control system may include a sensor configured to provide a pressure signal indicative of the pressure of a flow of fluid produced by the device. A measured pressure may be compared to a set pressure to determine a pressure error. A slip frequency may be adjusted as a function of the pressure error in an attempt to eliminate or minimise the pressure error.Type: GrantFiled: March 20, 2020Date of Patent: December 28, 2021Assignee: ResMed Motor Technologies Inc.Inventors: David James Fleming, Michael Grunberg, Aleksandr S. Nagorny, Siavash Sadeghi
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Patent number: 11177728Abstract: A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.Type: GrantFiled: February 19, 2020Date of Patent: November 16, 2021Assignee: ResMed Motor Technologies Inc.Inventors: Aleksandr S. Nagorny, Siavash Sadeghi, David James Fleming, Michael Bruce Moir
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Patent number: 11081946Abstract: A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly 3002 may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.Type: GrantFiled: March 3, 2020Date of Patent: August 3, 2021Assignee: ResMed Motor Technologies Inc.Inventors: Aleksandr S. Nagorny, Siavash Sadeghi, David James Fleming, Michael Bruce Moir
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Publication number: 20210094590Abstract: A magnetic levitation train system with an asymmetrical power distribution is provided, having a train which is moved through a track that is at least partly located within an airless tube, the track having at least two stations, having each section of the track between two correlative stations the following zones: an acceleration zone located at the beginning of the section, having a plurality of consecutive winding segments electrically connected to each other and to a current supply, a deceleration zone, comprising a plurality of consecutive winding segments electrically connected to each other and to a current supply, and a cruise zone in which the train is moved on a cruise speed, located between the acceleration zone and the deceleration zone, having a plurality of winding segments electrically connected to a current supply, and comprising a plurality of empty spaces between some of the winding segments.Type: ApplicationFiled: September 26, 2019Publication date: April 1, 2021Inventors: Amir Babazadeh, Siavash Sadeghi, Andrea La Mendola
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Patent number: 10742102Abstract: A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly 3002 may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.Type: GrantFiled: January 16, 2015Date of Patent: August 11, 2020Assignee: ResMed Motor Technologies Inc.Inventors: Aleksandr S. Nagorny, Siavash Sadeghi, David James Fleming, Michael Bruce Moir
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Publication number: 20200215282Abstract: A method of a control system controls an inductance motor in a device that may include an impeller using a pressure compensation control system. The control system may be implemented in a respiratory pressure therapy device. The control system may include a sensor configured to provide a pressure signal indicative of the pressure of a flow of fluid produced by the device. A measured pressure may be compared to a set pressure to determine a pressure error. A slip frequency may be adjusted as a function of the pressure error in an attempt to eliminate or minimise the pressure error.Type: ApplicationFiled: March 20, 2020Publication date: July 9, 2020Applicant: RESMED MOTOR TECHNOLOGIES INC.Inventors: David James Fleming, Michael Grunberg, Aleksandr S. Nagorny, Siavash Sadeghi
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Publication number: 20200204052Abstract: A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly 3002 may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.Type: ApplicationFiled: March 3, 2020Publication date: June 25, 2020Applicant: RESMED MOTOR TECHNOLOGIES INC.Inventors: Aleksandr S. Nagorny, Siavash Sadeghi, David James Fleming, Michael Bruce Moir
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Publication number: 20200195109Abstract: A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.Type: ApplicationFiled: February 19, 2020Publication date: June 18, 2020Applicant: RESMED MOTOR TECHNOLOGIES INC.Inventors: Aleksandr S. NAGORNY, Siavash Sadeghi, David James Fleming, Michael Bruce Moir
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Publication number: 20200136485Abstract: A multi-phase electric machine may include a stator, and a rotor for rotating within the stator, the rotor including poles having combination magnet pieces with varying strengths and dimensions creating a non-sinusoidal back EMF. In one aspect, a multi-phase electric machine may include a stator, and a rotor for spinning within the stator, the rotor includes a plurality of poles having magnet assemblies includes at least a low strength magnet and a high strength magnet therein for creating a non-sinusoidal back EMF. In other aspects, a multi-phase electric machine of the present disclosure includes a stator, and a rotor for spinning within the stator, the rotor including a plurality of poles having magnet assemblies includes at least a first magnet and second magnet therein for creating a non-sinusoidal back EMF wherein a strength ratio of the first magnet and second magnet greater than the absolute value of 1.Type: ApplicationFiled: October 30, 2019Publication date: April 30, 2020Applicant: Optiphase Drive Systems, Inc.Inventors: Siavash Sadeghi, Arash Hassanpour Isfahani
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Patent number: 10625035Abstract: A method of a control system (2200) controls an inductance motor in a blower including an impeller and volute using a pressure compensation control system. The control system may be implemented in a respiratory pressure therapy device. The control system may include a sensor configured to provide a pressure signal indicative of the pressure of a flow of fluid produced by the blower. A measured pressure may be compared to a set pressure to determine a pressure error. A slip frequency may be adjusted as a function of the pressure error in an attempt to eliminate or minimise the pressure error.Type: GrantFiled: September 16, 2015Date of Patent: April 21, 2020Assignee: ResMed Motor Technologies Inc.Inventors: David James Fleming, Michael Grunberg, Aleksandr S. Nagorny, Siavash Sadeghi
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Patent number: 10450705Abstract: Magnetic levitation train system comprising a plurality of rows of magnets being faced against a track onto which the magnetic levitation train system rides on, the plurality of rows of the magnets each being arranged in a Halbach array configuration, and further being arranged to cooperate to form a magnetic field exerted onto said track, wherein the magnets of each row of magnets are alternatively displaced with respect to each other according to a sinusoidal configuration.Type: GrantFiled: February 22, 2017Date of Patent: October 22, 2019Assignee: HYPERLOOP TRANSPORTATION TECHNOLOGIES, INC.Inventor: Siavash Sadeghi
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Publication number: 20180237996Abstract: Magnetic levitation train system comprising a plurality of rows of magnets being faced against a track onto which the magnetic levitation train system rides on, the plurality of rows of the magnets each being arranged in a Halbach array configuration, and further being arranged to cooperate to form a magnetic field exerted onto said track, wherein the magnets of each row of magnets are alternatively displaced with respect to each other according to a sinusoidal configuration.Type: ApplicationFiled: February 22, 2017Publication date: August 23, 2018Inventor: Siavash SADEGHI
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Publication number: 20170363096Abstract: A method of a control system (2200) controls an inductance motor in a blower including an impeller and volute using a pressure compensation control system. The control system may be implemented in a respiratory pressure therapy device. The control system may include a sensor configured to provide a pressure signal indicative of the pressure of a flow of fluid produced by the blower. A measured pressure may be compared to a set pressure to determine a pressure error. A slip frequency may be adjusted as a function of the pressure error in an attempt to eliminate or minimise the pressure error.Type: ApplicationFiled: September 16, 2015Publication date: December 21, 2017Applicant: ResMed Motor Technologies Inc.Inventors: David James Fleming, Michael Grunberg, Aleksandr S. Nagorny, Siavash Sadeghi
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Publication number: 20160336841Abstract: A stator assembly has coils in a distributed winding configuration. A poly-phase switched reluctance motor assembly 3002 may include a stator assembly with multiple coils in a distributed winding configuration. The stator assembly may have a central bore into which a rotor assembly having multiple poles is received and configured to rotate. A method of controlling a switched reluctance motor may include at least three phases wherein during each conduction period a first phase is energized with negative direction current, a second phase is energized with positive current and there is at least one non-energized phase. During each commutation period either the first phase or second phase switches off to a non-energized state and one of the non-energized phases switches on to an energized state with the same direction current as the first or second phase that was switched off. The switched reluctance motor may include a distributed winding configuration.Type: ApplicationFiled: January 16, 2015Publication date: November 17, 2016Applicant: ResMed Motor Technologies Inc.Inventors: Aleksandr S. Nagorny, Siavash Sadeghi, David James Fleming, Michael Bruce Moir