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公开(公告)号：US20220166264A1
公开(公告)日：2022-05-26
申请号：US17116661
申请日：2020-12-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Alireza FATEMI , Anil K. SACHDEV , Jian YAO , Anthony M. COPPOLA , Thomas W. NEHL , Chengwu DUAN
Abstract: A bi-material permanent magnet for an electric machine includes a core including a first magnetic material and a shell portion located on the core and made of a second magnetic material. The first magnetic material comprises a magnet material with an energy less than 20 Mega Gauss Oersteds (MGOe). The second magnetic material comprises a magnet material with an energy greater than 30 MGOe.
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公开(公告)号：US20210036643A1
公开(公告)日：2021-02-04
申请号：US16527846
申请日：2019-07-31
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Yue-Yun WANG , Lei HAO , Alireza FATEMI , Thomas W. NEHL , Chandra S. NAMUDURI
Abstract: A current command module is configured to, based on a direct current (DC) bus voltage for an electric motor of the vehicle, generate a d-axis current command for the electric motor and a q-axis current command for the electric motor. A voltage command module configured to generate voltage commands based on the d-axis current command and the q-axis current command. A battery switching control module is configured to: determine a voltage operating state of a battery based on the voltage commands; compare a battery parameter to at least one of a predetermined voltage parameter and a predetermined current parameter during a dwell time when a plurality of switches of the battery are open; and generate a switch control signal to transition at least one switch of the plurality of switches to cause the battery to operate in the voltage operating state based on the comparison.
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3.发明申请公开(公告)号：US20220294376A1
公开(公告)日：2022-09-15
申请号：US17195727
申请日：2021-03-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad H. ALVI , Alireza FATEMI , Suresh GOPALAKRISHNAN , Chandra S. NAMUDURI
Abstract: An electric machine disposed within a housing includes a stator, a rotor, and one or more point field detectors. The stator receives current from an inverter. The rotor is connected to and rotating a shaft based on a magnetic field generated by the stator. The one or more point field detectors are configured to detect leakage flux within the housing. The stator, the rotor and the one or more point field detectors are disposed within the housing.
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公开(公告)号：US20220166268A1
公开(公告)日：2022-05-26
申请号：US17489552
申请日：2021-09-29
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chengwu DUAN , Jian YAO , Alireza FATEMI
Abstract: A stator assembly for an axial flux motor includes a heat exchanger jacket configured to circulate a heat transfer liquid. A stator also includes a plurality of stator cores each having a conductive winding, an electrically insulating material disposed over at least a portion of the conductive wire winding, and a molded soft magnetic composite (SMC) material. The heat exchanger jacket is disposed circumferentially around at least a portion of a perimeter of the stator. Each stator core defines a peripheral surface configured to contact the heat exchanger jacket and at least a portion of the peripheral surface is defined by the molded soft magnetic composite (SMC) material. Methods of making a molded soft magnetic composite (SMC) material stator core are also provided.
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Patent Agency Ranking
公开(公告)号：US20240171034A1
公开(公告)日：2024-05-23
申请号：US17991954
申请日：2022-11-22
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： William T. IVAN , Alireza FATEMI , Rajeev VYAS
CPC classification number: H02K5/1732 , F16C19/18 , H02K7/083 , H02K11/02 , F16C2380/26
Abstract: An electric machine including a stator, a rotor within the stator, and a shaft to which the rotor is mounted. The shaft extends through the stator. A first bearing and a second bearing support the shaft within the stator to allow the shaft and the rotor to rotate within the stator. The rotor is between the first bearing and the second bearing. A first magnetic core is at the shaft between the rotor and the first bearing. The first magnetic core is configured to suppress a bearing current flowing across the shaft, the first bearing, and the second bearing.
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公开(公告)号：US20230291281A1
公开(公告)日：2023-09-14
申请号：US17690071
申请日：2022-03-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Alireza FATEMI , Chih-Hung YEN , Farzad SAMIE , SeungHwan KEUM , Thomas W. NEHL , Xiaofeng YANG
Abstract: A motor stator includes a stator core having a plurality of stator teeth on an inner diameter thereof and defining a respective plurality of slots between the plurality of stator teeth. A plurality of windings are disposed in the slots. A heat pipe network includes a plurality of evaporator portions including a hollow structure disposed in at least a portion of the plurality of slots and including an interior having a wick extending along the interior of the hollow structure. A condenser portion has an interior portion in communication with the plurality of evaporator portions and is located at an end of the stator core. The wick of each of the plurality of evaporator portions extend into the condenser portion.
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公开(公告)号：US20230344287A1
公开(公告)日：2023-10-26
申请号：US17725653
申请日：2022-04-21
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Derek Frei LAHR , Anthony Michael COPPOLA , Alireza FATEMI
IPC: H02K1/27
CPC classification number: H02K1/27
Abstract: A rotor of an electric machine includes: N pole pieces, each of the N pole pieces including two half pole pieces, where N is an integer greater than 2; apertures through the half pole pieces, respectively; permanent magnets disposed within the apertures, respectively, the permanent magnets including, in each of the N pole pieces, a first permanent magnet of a first magnetic polarity and a second permanent magnet of a second magnetic polarity; and structural non-magnetic portions disposed in gaps of the half pole pieces, respectively, and configured to magnetically disconnect a rotor web from a q-axis flux guide.
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公开(公告)号：US20220286072A1
公开(公告)日：2022-09-08
申请号：US17191050
申请日：2021-03-03
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Suresh GOPALAKRISHNAN , Chandra S. NAMUDURI , Lei HAO , Muhammad H. ALVI , Alireza FATEMI
IPC: H02P21/22 , H02P27/08 , H02M7/5387
Abstract: A motor control system includes: a d-q target module configured to, based on a target torque of an electric motor, determine a first target d-axis current and a first target q-axis current; an offset module configured to, based on a capacitor current through capacitors connected across phases of the electric motor, determine a d-axis current offset and a q-axis current offset; an adder module configured to determine a second target d-axis current based on a sum of the first target d-axis current and the d-axis current offset and to determine a second target q-axis current based on a sum of the first target q-axis current and the q-axis current offset; and a driver module configured to, based on the second target d-axis current and the second target q-axis current, switch switches of a current source inverter (CSI) module configured to apply power to the phases of the electric motor.
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公开(公告)号：US20210288569A1
公开(公告)日：2021-09-16
申请号：US17081390
申请日：2020-10-27
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Jian YAO , Chengwu DUAN , Yusheng ZOU , Alireza FATEMI
Abstract: An axial flux motor includes: a stator having a first side and a second side opposite the first side, the stator including: N stator core components on the first side, where N is an integer greater than two; and pole shoes attached to radial sides of the N stator core components, N slot openings between adjacent ones of the pole shoes, where each of the N slot openings extends in at least one direction non-radially on the first side; and a rotor including a third side and M permanent magnets on the third side, where the first side is parallel to the third side, and where M is an integer greater than two.
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