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公开(公告)号：US20220231624A1
公开(公告)日：2022-07-21
申请号：US17613713
申请日：2020-05-29
申请人： Aiswarya BALAMURALl , Philip KORTA , Shruthi MUKUNDAN , Anik ANIMESH , Narayan Chandra KAR , Lakshmi Varaha IYER , Gerd SCHLAGER , MAGNA INTERNATIONAL INC. , UNIVERSITY OF WINDSOR
发明人： Aiswarya BALAMURALI , Phlip KORTA , Shruthi MUKUNDAN , Anik ANIMESH , Narayan Chandra KAR , Lakshmi Varaha IYES , Gerd SCHLAGER
摘要： A motor drive system and method for determining an optimized efficiency of the motor drive system are provided. The motor drive system includes a system controller, a motor drive having includes an inverter configured to generate the AC power upon one or more motor leads, and an electric motor, which is to convert the AC power from the motor leads to rotational energy. A dynamometer may include a load coupled to the shaft and sensors to measure to measure operating characteristics such as torque and speed of the electric motor. The system controller is configured to generate a lookup table, with an entry describing an output current command for operating the inverter and the motor at a maximum system efficiency for a given combination rotational speed and output torque. Motor temperature may also be measured and used as an additional index into the lookup table.
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公开(公告)号：US20220216806A1
公开(公告)日：2022-07-07
申请号：US17605385
申请日：2020-04-24
发明人： Animesh KUNDU , Aiswarya BALAMURALI , Himavarsha DHULIPATI , Narayan Chandra KAR , Lakshmi Varaha IYER , Gerd SCHLAGER , Philip KORTA , Wolfgang BAECK
IPC分类号： H02M7/5387 , H02M1/00 , H02M1/084 , H02P27/08 , B60L15/00
摘要： A motor drive system for an electrified vehicle includes a DC source, such as a battery, and an inverter, which includes one or more phase drivers, each configured to switch current from the DC source to generate AC power upon one or more output terminals using a hybrid of two or more different solid-state switches, each having a corresponding voltage rating. A nine-switch inverter includes three phase drivers, each including high, low, and middle solid-state switches, with Si-MOSFET high and low switches having a first voltage rating of half of the rated voltage of the system, and with Gallium Nitride (GaN) transistors rated to block a full rated voltage of the system used for the middle switches. A delay driver synchronizes timing between two different solid-state switches by energizing control terminals at different rates. The inverter can be operated using near-state pulse-width modulation (NSPWM) to reduce switching losses.
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公开(公告)号：US20210246972A1
公开(公告)日：2021-08-12
申请号：US17048727
申请日：2019-04-18
发明人： Gerd SCHLAGER
摘要： An electric drive module (e-drive module) for an electric motor vehicle and chain driven electric-drive (e-drive) gearbox therefor is provided. The e-drive gearbox has first and second chain members operably coupling an output shaft of an electric motor to a shaft of a driven output member. A first drive gear is rotatable with the output shaft of the electric motor. A first driven gear is coupled to the first drive gear via the first chain member. A second driven gear is coupled to the first driven gear via a common shaft and co-rotatable with the first driven gear. A second drive gear is coupled to the second driven gear via the second chain member. The respective rotational axes of the first and second drive gears and the first and second driven gears are parallel to each other.
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公开(公告)号：US20230400515A1
公开(公告)日：2023-12-14
申请号：US18035336
申请日：2021-11-08
发明人： Ashutosh PATEL , Chunyan LAI , Narayan Chandra KAR , Gerd SCHLAGER , Martin WINTER , Alexander EXL , Lakshmi Varaha IYER
IPC分类号： G01R31/34
CPC分类号： G01R31/346 , G01R31/343
摘要： A method and system for characterizing a state of health of a winding of an electric machine are provided. The winding may include one or more stator windings in an electric machine, for example, a permanent magnet synchronous machine (PMSM). The method comprises: applying a voltage pulse to the winding; measuring a phase current signal of a current supplied to the winding; determining a high-frequency transient current based on the phase current signal. The state of health of the winding may be calculated as a function of change in frequency spectrum of the high-frequency transient current. The method may include calculating a plurality of packets using a wavelet packet decomposition of the high-frequency transient current; and determining one or both of: the state of health or a classification of degradation, using an indicator based upon at least one packet of the plurality of packets.
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5.发明申请公开(公告)号：US20220348050A1
公开(公告)日：2022-11-03
申请号：US17271741
申请日：2019-08-29
摘要： A system for transferring waste heat from a range extender module of an electric vehicle to a cabin module includes a cooling circuit in the range extender module and a heating circuit of the cabin module. The cooling circuit is thermally coupled to the heating circuit. The cooling circuit includes a thermal coupler and the heating circuit includes a corresponding thermal coupler. The thermal coupler of the cabin module heating circuit may be disposed at the rear of the cabin module, and the thermal coupler for the cooling circuit of the range extender module may be disposed at the front of the range extender module. The thermal coupler of the range extender module may be longitudinally adjustable.
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公开(公告)号：US20220286040A1
公开(公告)日：2022-09-08
申请号：US17635904
申请日：2020-08-14
申请人： Wolfgang BAECK , Michael NEUDORFHOFER , Gerd SCHLAGER , Lakshmi Varaha IYER , Philip KORTA , MAGNA INTERNATIONAL INC.
摘要： A power electronic converter supplies DC output power to an output bus for supplying a load, such as a battery. The power electronic converter includes a DC link capacitor configured to provide a DC link voltage with a ripple of 80 V peak-to-peak. The power electronic converter also includes a DC/DC stage having a DC/AC converter that includes one or more switches to selectively conduct current from the DC link bus to supply an AC power to a transformer. The switches of the DC/AC converter are mounted to an insulated metal substrate that is in thermal contact with a transformer housing for dissipating heat therefrom. A controller controls one or more switches of the DC/AC converter and varies a switching frequency responsive to the ripple of the DC link voltage.
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公开(公告)号：US20220224176A1
公开(公告)日：2022-07-14
申请号：US17440959
申请日：2020-03-20
发明人： Lakshmi Varaha IYER , Gerd SCHLAGER
摘要： A permanent magnet assisted synchronous reluctance machine includes a stator that includes a plurality of electrical conductors radially disposed on the stator. The permanent magnet assisted synchronous reluctance machine also includes a rotor that includes a body having an outer diameter corresponding to an inner diameter of the stator and a plurality of recesses disposed on a surface of the rotor. The permanent magnet assisted synchronous reluctance machine also includes at least one ferrite magnet disposed in a corresponding recess of the rotor.
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公开(公告)号：US20220118824A1
公开(公告)日：2022-04-21
申请号：US17275277
申请日：2019-09-11
发明人： Gerd SCHLAGER
摘要： A vehicle system includes an electric motor that also operates as a generator. A torque transfer mechanism is attached to the electric motor and a second torque transfer mechanism is connected via a disconnect mechanism. An AC compressor is attached to the first torque transfer mechanism via a clutch, which has an open position and a closed position. During recuperation, the second torque transfer mechanism is connected to the first torque transfer mechanism and the clutch is closed, and the compressor is driven by the motor. During stand-still, the second torque transfer mechanism is disconnected from the first torque transfer mechanism, and the compressor is driven by the motor. During drive operation, the second torque transfer mechanism is connected to the first torque transfer mechanism, and the clutch is open such that the compressor is not driven, but the system continues to provide cool air to the vehicle cabin.
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公开(公告)号：US20210384788A1
公开(公告)日：2021-12-09
申请号：US17287257
申请日：2019-10-22
发明人： Martin WINTER , Gerd SCHLAGER
摘要： A stator for an electromagnetic machine includes a plurality of bus bars of copper, each extending parallel to one another between a first end and a second end. A first circuit board abuts the first end of the bus bars and includes a first substrate and a first electrically conductive layer disposed thereupon with a plurality of first contact terminals in physical and electrical communication with each of the bus bars. A similar second circuit board abuts the second end of each of the bus bars and includes a second substrate and second contact terminals in physical and electrical communication with each of the bus bars. The substrates of the circuit boards are electrical insulators and are good conductors of heat. A heat sink abuts each of the substrates of the circuit boards for removing heat from the circuit boards and from the bus bars.
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公开(公告)号：US20230010253A1
公开(公告)日：2023-01-12
申请号：US17784868
申请日：2020-12-11
申请人： Ram BALACHANDAR , Abishek SRIDHAR , Lakshim Varaha IYER , Gerd SCHLAGER , MAGNA INTERNATIONAL INC.
摘要： An impingement cooling system includes a porous heat spreader and a nozzle configured to direct a fluid as a jet and/or as a spray impinging upon the porous heat spreader. The porous heat spreader is made of a thermally-conductive material such as a metal, metal alloy, carbon/graphite, or ceramic, and is in thermal contact with a heat source. The nozzle may be configured to direct the fluid as a jet comprising a single component liquid or gas (including air) or a liquid mixture such as water-glycol or other coolants. The nozzle may be configured to direct the fluid as a spray comprising a single component liquid or gas (including air) or a liquid mixture such as water-glycol or other coolants. The cooling system may include one or more nozzles, which may direct the cooling fluid orthogonally or at an oblique angle to an impingement plate.
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