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公开(公告)号：US11929697B2
公开(公告)日：2024-03-12
申请号：US17750503
申请日：2022-05-23
IPC分类号： H02P25/08 , H02P6/18 , H02P6/185 , H02P25/089
CPC分类号： H02P25/089 , H02P6/185 , H02P6/186
摘要： A system and method for reliable control of a high rotor pole switched reluctance machine (HRSRM) utilizing a sensorless reliable control system. The method comprising: energizing at least one of the plurality of stator phases; measuring a first current value and time taken by the first current value to reach a first peak value or preset threshold value of current; determining a self-inductance value; measuring a second current value and time taken by an adjacent un-energized stator phase to reach a second peak value of current; determining a mutual inductance value; and estimating a rotor position utilizing the self-inductance and mutual inductance values; and controlling the HRSRM based on the estimated rotor position.
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公开(公告)号：US11827109B2
公开(公告)日：2023-11-28
申请号：US17608389
申请日：2020-03-19
申请人： RICARDO UK LIMITED
发明人： Raymond Coles , Ozge Taskin
IPC分类号： H02P1/46 , B60L50/61 , H02P23/30 , H02P25/08 , H02K1/276 , H02K7/00 , H02K7/02 , H02P101/45 , H02P103/20
CPC分类号： B60L50/61 , H02K1/2773 , H02K7/006 , H02K7/025 , H02P23/30 , H02P25/0805 , B60L2220/14 , B60L2220/18 , B60L2240/421 , B60L2240/423 , B60L2240/443 , H02P2101/45 , H02P2103/20
摘要： A method of operating an electric or hybrid system comprising a synchronous reluctance electric motor coupled to an electric or hybrid powertrain is described herein. The method comprises determining (i) a torque demand required of the electric motor and (ii) a speed of rotation of the rotor of the electric motor, and storing kinetic energy in a rotor of the electric motor from the powertrain in response to at least one of (i) the determined torque demand falling below a selected torque demand threshold and (ii) the speed of the rotor being below a selected rotor speed threshold. The method further comprises operating the electric motor by powering the electric motor with electricity to deliver energy to the powertrain in response to at least one of: (i) the determined torque demand rising above a selected torque demand threshold and (ii) the speed of the rotor falling below a selected rotor speed threshold.
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公开(公告)号：US20220416707A1
公开(公告)日：2022-12-29
申请号：US17840116
申请日：2022-06-14
发明人： Zhiqian CHEN
摘要： Methods, controllers and electric machine systems are described for selective phase control of electric machines (e.g. electric motors and generators).
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公开(公告)号：US11533016B2
公开(公告)日：2022-12-20
申请号：US16509927
申请日：2019-07-12
申请人： DENSO CORPORATION
发明人： Haruo Suzuki , Takashi Suzuki
摘要： A control unit determines a presence or absence of a short-circuit failure with respect to a target switch which is a phase-opening switch to be determined. At this time, after opening all the phase opening switches, the control unit drives an inverter to connect a power supply line provided with the target switch among the phase opening switches to ground. The control unit determines that the target switch has a short-circuit failure when a voltage of the power supply line in which the target switch is not provided is smaller than a predetermined voltage.
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公开(公告)号：US11519465B2
公开(公告)日：2022-12-06
申请号：US16897838
申请日：2020-06-10
发明人： Kevin Rauh , Nicholas Hrusch
IPC分类号： H02K37/14 , F16D27/102 , F16D15/00 , F16D41/063 , F16D41/08 , F04B17/03 , H02P25/08 , F04C2/10 , F04C15/00
摘要： A pump includes a stator and a rotor axially between a fluid inlet section and a fluid outlet section. The stator includes a plurality of radially inwardly extending legs; and a plurality of electrical windings disposed about the radially inwardly extending legs. The attenuating circuit includes a capacitor electrically wired in parallel with each winding and at least one switch electrically connected to the capacitor. During energization of the electrical winding, the switch electrically connects the capacitor to an electrical ground and the electrical power source creates a voltage in the capacitor. Following a de-energization of the plurality of electrical windings, the switch isolates the capacitor from the electrical ground and the capacitor discharges the voltage through the electrical winding, creating a decaying oscillating current that attenuates residual magnetization in the winding.
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公开(公告)号：US11515824B2
公开(公告)日：2022-11-29
申请号：US17129201
申请日：2020-12-21
申请人： Caterpillar Inc.
发明人： Jesse R. Gerdes , Jackson Wai , Ahmed Khalil , James Michael Thorne , Sajan Abdul , Amara Ashfaq
IPC分类号： H02P6/18 , H02P25/098 , H02P21/20 , H02P25/08
摘要： A system and method for torque compensation in a switched reluctance (SR) machine disposed on a machine is disclosed. The system may comprise a SR machine, an inverter and a controller. The controller is in operable communication with the inverter and is configured to determine a commanded main current associated with energization by a main current of a first portion of the plurality of windings for a controlling phase, and determine a commanded parasitic current associated with energization by a parasitic current of a second portion of the windings in a non-controlling phase. The controller is further configured to determine an offset current based on the commanded parasitic current, and determine a target current based on a first sum of the commanded main current and the offset current, and command the inverter to actuate the target current in the first portion of the windings during the controlling phase.
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公开(公告)号：US11387760B2
公开(公告)日：2022-07-12
申请号：US17339435
申请日：2021-06-04
申请人： JTEKT CORPORATION
发明人： Yuta Iwai
IPC分类号： H02P1/46 , H02P3/18 , H02P6/00 , H02P21/22 , H02P21/18 , H02P21/00 , H02P25/08 , H02P27/12 , B62D5/04
摘要： A motor control device includes: a second setting unit configured to set an armature current command value and a current phase angle command value based on a rotation speed and a motor torque command value; and a current vector setting unit configured to set a d-axis current command value and a q-axis current command value based on the armature current command value and the current phase angle command value. The second setting unit is configured to set the armature current command value and the current phase angle command value such that an armature current vector which is set based on the d-axis current command value and the q-axis current command value is included in an area surrounded by an armature current vector locus in maximum torque/current control and a vertical axis in a d-q coordinate system.
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公开(公告)号：US20220200502A1
公开(公告)日：2022-06-23
申请号：US17129201
申请日：2020-12-21
申请人： Caterpillar Inc.
发明人： Jesse R. Gerdes , Jackson Wai , Ahmed Khalil , James Michael Thorne , Sajan Abdul , Amara Ashfaq
IPC分类号： H02P25/098 , H02P21/20 , H02P25/08
摘要： A system and method for torque compensation in a switched reluctance (SR) machine disposed on a machine is disclosed. The system may comprise a SR machine, an inverter and a controller. The controller is in operable communication with the inverter and is configured to determine a commanded main current associated with energization by a main current of a first portion of the plurality of windings for a controlling phase, and determine a commanded parasitic current associated with energization by a parasitic current of a second portion of the windings in a non-controlling phase. The controller is further configured to determine an offset current based on the commanded parasitic current, and determine a target current based on a first sum of the commanded main current and the offset current, and command the inverter to actuate the target current in the first portion of the windings during the controlling phase.
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公开(公告)号：US20220149756A1
公开(公告)日：2022-05-12
申请号：US17576964
申请日：2022-01-16
申请人： Sevcon Limited
发明人： Howard Slater , David Hodgson
摘要： A method of controlling a switched reluctance motor is disclosed herein. The motor composes a stator carrying a plurality of phase windings and a rotor. The method comprises activating the phase windings in a sequence selected to apply torque to the rotor. Wherein during a cycle of rotation of the rotor the phase windings switch between an active state in which current in the phase winding applies torque to the rotor and an inactive state, applying a voltage to a selected phase winding whilst the selected phase winding is in the inactive state to provide a flux in the selected phase winding: determining the current in the selected phase winding; determining the rotor angle based on the current and the flux, and controlling said activating based on the rotor angle.
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公开(公告)号：US20220123681A1
公开(公告)日：2022-04-21
申请号：US17562669
申请日：2021-12-27
申请人： Linear Labs, Inc.
摘要： Disclosed are various embodiments for reluctance synchronous machines having a rotor comprising a plurality of rotor core assemblies configured to form a reluctance torque tunnel having at least a first reluctance tunnel segment and a second reluctance tunnel segment and a stator having a plurality of coils configured to form a coil winding assembly, the coil winding assembly positioned within the reluctance torque tunnel, such that at least one of the plurality of coils is surrounded by the first reluctance tunnel segment or the second reluctance tunnel segment, alternatively the rotor may be the coil winding assembly and the stator may be the reluctance torque tunnel.
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