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公开(公告)号：US11616428B2
公开(公告)日：2023-03-28
申请号：US17226582
申请日：2021-04-09
发明人： John Lawler , John Powers , Scott Coakley , Alan Crapo , David DeGraaff , Christopher David Gadda , Andrew Hancock , Shannon Miller , Samuel Sherman , Matthew Svrcek , Kevin Walters
摘要： A linear electromagnetic machine includes a stator, a translator, and a bearing system. The bearing system maintains alignment against lateral displacement of the translator relative to the stator, as the translator reciprocates axially. More particularly, the bearing system maintains a motor air gap between the stator and a magnetic section of the translator. The stator includes a plurality of stator teeth and windings, which form a plurality of phases. The stator teeth and windings are arranged using a hoop stack with spines to form a stator bore and define the motor air gap. The bearing system can include bearing housings that are configured to form a bearing interface with a surface of the translator. The bearing interface can include a contact bearing or a non-contact bearing, such as a gas bearing. Current is controlled in the phases to convert between electrical energy and kinetic energy of the translator.
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公开(公告)号：US20210288570A1
公开(公告)日：2021-09-16
申请号：US17226582
申请日：2021-04-09
发明人： John Lawler , John Powers , Scott Coakley , Alan Crapo , David DeGraaff , Christopher David Gadda , Andrew Hancock , Shannon Miller , Samuel Sherman , Matthew Svrcek , Kevin Walters
摘要： A linear electromagnetic machine includes a stator, a translator, and a bearing system. The bearing system maintains alignment against lateral displacement of the translator relative to the stator, as the translator reciprocates axially. More particularly, the bearing system maintains a motor air gap between the stator and a magnetic section of the translator. The stator includes a plurality of stator teeth and windings, which form a plurality of phases. The stator teeth and windings are arranged using a hoop stack with spines to form a stator bore and define the motor air gap. The bearing system can include bearing housings that are configured to form a bearing interface with a surface of the translator. The bearing interface can include a contact bearing or a non-contact bearing, such as a gas bearing. Current is controlled in the phases to convert between electrical energy and kinetic energy of the translator.
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公开(公告)号：US20220399784A1
公开(公告)日：2022-12-15
申请号：US17848926
申请日：2022-06-24
发明人： Matt Svrcek , David DeGraaff , Kevin Walters , Cameron Wylie , John Powers , John Lawler , Sam Sherman , Jodie Prudhomme , Scott Coakley
摘要： An integrated linear generator system includes, for example, a generator assembly, a control system, a frame system, an exhaust system, an intake system, a cooling system, a bearing system, one or more auxiliary systems, or a combination thereof. The generator system is configured to generate power, as controlled by the control system. The generator assembly may include an opposed- and free-piston linear generator, configured to operate on a two-stroke cycle. The intake and exhaust systems are configured to provide reactants to and remove products from the generator assembly, respectively. The cooling system is configured to effect heat transfer, material temperature, or both, of components of the integrated linear generator system. The bearing system is configured to constrain the off-axis motion of translators of the generator assembly without applying significant friction forces. The frame system is configured to manage rigidity, flexibility, and alignment of components of the integrated linear generator system.
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公开(公告)号：US20220173682A1
公开(公告)日：2022-06-02
申请号：US17527961
申请日：2021-11-16
摘要： Systems and methods are provided for braking a translator of a linear multiphase electromagnetic machine. The system detects a fault event, and in response to detecting the fault event, causes the translator to brake using an electromagnetic technique. Braking includes causing the translator to stop reciprocating, by applying a force opposing an axial motion, which may occur within one cycle, or over many cycles. The fault event may include, for example, a fault associated with an encoder, a controller, an electrical component, a communications link, a phase, or a subsystem. The system includes a power electronics system configured to apply current to the phases. The system may use position information, current information, operating parameters, or a combination thereof to brake. Alternatively, the system need not use position information, current information, and operating parameters, and may brake the translator independent of such information.
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公开(公告)号：US20200328707A1
公开(公告)日：2020-10-15
申请号：US16913090
申请日：2020-06-26
摘要： Systems and methods are provided for braking a translator of a linear multiphase electromagnetic machine. The system detects a fault event, and in response to detecting the fault event, causes the translator to brake using an electromagnetic technique. Braking includes causing the translator to stop reciprocating, by applying a force opposing an axial motion, which may occur within one cycle, or over many cycles. The fault event may include, for example, a fault associated with an encoder, a controller, an electrical component, a communications link, a phase, or a subsystem. The system includes a power electronics system configured to apply current to the phases. The system may use position information, current information, operating parameters, or a combination thereof to brake. Alternatively, the system need not use position information, current information, and operating parameters, and may brake the translator independent of such information.
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公开(公告)号：US11211885B2
公开(公告)日：2021-12-28
申请号：US16913090
申请日：2020-06-26
IPC分类号： H02P9/08 , H02P6/00 , H02P25/06 , H02P3/18 , H02H7/08 , F02B71/04 , H02P9/00 , H02P101/25 , H02K7/18
摘要： Systems and methods are provided for braking a translator of a linear multiphase electromagnetic machine. The system detects a fault event, and in response to detecting the fault event, causes the translator to brake using an electromagnetic technique. Braking includes causing the translator to stop reciprocating, by applying a force opposing an axial motion, which may occur within one cycle, or over many cycles. The fault event may include, for example, a fault associated with an encoder, a controller, an electrical component, a communications link, a phase, or a subsystem. The system includes a power electronics system configured to apply current to the phases. The system may use position information, current information, operating parameters, or a combination thereof to brake. Alternatively, the system need not use position information, current information, and operating parameters, and may brake the translator independent of such information.
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公开(公告)号：US10916991B2
公开(公告)日：2021-02-09
申请号：US16745155
申请日：2020-01-16
发明人： Anthony Da Costa , John Powers
IPC分类号： F02B71/06 , H02K7/18 , F02B71/04 , H02M3/06 , F02B63/04 , H02M3/158 , H02P6/00 , H02P25/032 , H02P9/04
摘要： Multiphase electromagnetic machines, such as free-piston engines or compressors, may require, or supply, a pulsed power profile from or to a DC bus, respectively. The pulsed power profile may include relatively large fluctuations in instantaneous power. Sourcing, sinking, or otherwise exchanging power with an AC grid, via an inverter, may be accomplished by using an energy storage device and a DC-DC converter coupled to a DC bus. The energy storage device may aid in smoothing the pulsed power profile, while the DC-DC converter may aid in reducing fluctuations in voltage across a DC bus due to energy storage in the energy storage device.
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公开(公告)号：US20200227976A1
公开(公告)日：2020-07-16
申请号：US16745155
申请日：2020-01-16
发明人： Anthony Da Costa , John Powers
摘要： Multiphase electromagnetic machines, such as free-piston engines or compressors, may require, or supply, a pulsed power profile from or to a DC bus, respectively. The pulsed power profile may include relatively large fluctuations in instantaneous power. Sourcing, sinking, or otherwise exchanging power with an AC grid, via an inverter, may be accomplished by using an energy storage device and a DC-DC converter coupled to a DC bus. The energy storage device may aid in smoothing the pulsed power profile, while the DC-DC converter may aid in reducing fluctuations in voltage across a DC bus due to energy storage in the energy storage device.
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