Inventor · disambiguated record
Khwaja M. Rahman
Also filed as: RAHMAN KHWAJA · RAHMAN KHWAJA M · RAHMAN KHWAJA MUSTAFIZUR
75 granted patents·25 pending applications·1,237 citations·filing 2000–2025
99Inventor score
Files withGM GLOBAL TECH OPERATIONS INC26GM GLOBAL TECH OPERATIONS LLC21GEN MOTORS CORP16RIVIAN IP HOLDINGS LLC12RAHMAN KHWAJA M9
Top patents by PatentIndex Score
100 records- 0198US9379586B2Bar wound stator winding layout with long-pitched and short-pitched coilsGM GLOBAL TECH OPERATIONS INC·Filed 2013·Granted Jun 28, 2016·28 cites·16 claims
- 0298US8054084B2Methods and systems for diagnosing stator windings in an electric motorGM GLOBAL TECH OPERATIONS INC·Filed 2009·Granted Nov 8, 2011·89 cites·20 claims
- 0397US11824413B2Balanced winding layouts for electric motorsRIVIAN IP HOLDINGS LLC·Filed 2021·Granted Nov 21, 2023·4 cites·20 claims
- 0497US7592766B2Gearless wheel motor drive systemGM GLOBAL TECH OPERATIONS INC·Filed 2007·Granted Sep 22, 2009·47 cites·2 claims
- 0596US10581287B2Permanent magnet electric machine with variable magnet orientationGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Granted Mar 3, 2020·7 cites·20 claims
- 0696US8933606B2Interior permanent magnet machine with pole-to-pole asymmetry of rotor slot placementRAHMAN KHWAJA M·Filed 2011·Granted Jan 13, 2015·17 cites·9 claims
- 0796US8928197B2Pole-to-pole asymmetry in interior permanent magnet machines with arc-shaped slotsJURKOVIC SINISA·Filed 2012·Granted Jan 6, 2015·25 cites·16 claims
- 0896US7952308B2Method and apparatus for torque ripple reductionGM GLOBAL TECH OPERATIONS INC·Filed 2008·Granted May 31, 2011·42 cites·20 claims
- 0995US9520753B2Stator assembly with winding sets having hairpins from multiple hairpin layersGM GLOBAL TECH OPERATIONS LLC·Filed 2013·Granted Dec 13, 2016·16 cites·11 claims
- 1095US9130422B2Interior permanent magnet machine having a mixed rare earth magnet and ferrite magnet rotorGM GLOBAL TECH OPERATIONS INC·Filed 2013·Granted Sep 8, 2015·17 cites·12 claims
- 1195US7279862B1Fault handling of inverter driven PM motor drivesGM GLOBAL TECH OPERATIONS INC·Filed 2006·Granted Oct 9, 2007·62 cites·15 claims
- 1294US12160148B2Motor stator with semi-staggered winding layout utilizing complex twistingRIVIAN IP HOLDINGS LLC·Filed 2022·Granted Dec 3, 2024·2 cites·20 claims
- 1394US9847704B2Rotor assembly and method of manufacture for electric machines having multiple magnet lengthsGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Dec 19, 2017·7 cites·9 claims
- 1494US8884485B2Axially asymmetric permanent magnet machineJURKOVIC SINISA·Filed 2012·Granted Nov 11, 2014·19 cites·15 claims
- 1594US8760025B2Interior permanent magnet machine having off axis centered arc geometryRAHMAN KHWAJA M·Filed 2012·Granted Jun 24, 2014·14 cites·20 claims
- 1693US11498431B1Selectable differential drive for a vehicleRIVIAN IP HOLDINGS LLC·Filed 2021·Granted Nov 15, 2022·3 cites·20 claims
- 1792US10171014B1System and method for electric motor field weakening with variable magnet skewGM GLOBAL TECH OPERATIONS LLC·Filed 2017·Granted Jan 1, 2019·5 cites·20 claims
- 1892US8362732B2Motor phase winding fault detection method and apparatusGM GLOBAL TECH OPERATIONS INC·Filed 2010·Granted Jan 29, 2013·13 cites·17 claims
- 1992US7969058B2Permanent magnet motor with stator having asymmetric slots for reducing torque rippleGM GLOBAL TECH OPERATIONS INC·Filed 2007·Granted Jun 28, 2011·26 cites·8 claims
- 2092US6864646B2Multiple inverter system with low power bus ripples and method thereforGEN MOTORS CORP·Filed 2003·Granted Mar 8, 2005·54 cites·16 claims
- 2191US11766943B2Selectable differential drive for a vehicleRIVIAN IP HOLDINGS LLC·Filed 2022·Granted Sep 26, 2023·1 cites·20 claims
- 2291US7332837B2Cooling and handling of reaction torque for an axial flux motorGEN MOTORS CORP·Filed 2004·Granted Feb 19, 2008·54 cites·12 claims
- 2391US6674205B2Auxiliary magnetizing winding for interior permanent magnet rotor magnetizationGEN MOTORS CORP·Filed 2002·Granted Jan 6, 2004·47 cites·19 claims
- 2490US10541578B2Permanent magnet electric machine with moveable flux-shunting elementsGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Granted Jan 21, 2020·3 cites·20 claims
- 2590US8917005B2Rotor barrier shaping for demagnetization mitigation in an internal permanent magnet machineRAHMAN KHWAJA M·Filed 2011·Granted Dec 23, 2014·10 cites·20 claims
- 2690US8847460B2Asymmetric stator teeth in an electric motorJURKOVIC SINISA·Filed 2011·Granted Sep 30, 2014·12 cites·5 claims
- 2790US6703746B2Interior permanent magnet rotorGEN MOTORS CORP·Filed 2002·Granted Mar 9, 2004·38 cites·11 claims
- 2889US8542085B2High frequency rotary transformer for synchronous electrical machinesSTANCU CONSTANTIN C·Filed 2011·Granted Sep 24, 2013·9 cites·19 claims
- 2989US7474029B2Rotor magnet placement in interior permanent magnet machinesGEN MOTORS CORP·Filed 2004·Granted Jan 6, 2009·37 cites·9 claims
- 3089US6768932B2Wheel motor systemGEN MOTORS CORP·Filed 2002·Granted Jul 27, 2004·79 cites·18 claims
- 3188US11056943B2Stator assembly with electrically balanced conductor layersGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Granted Jul 6, 2021·3 cites·15 claims
- 3288US7262536B2Gearless wheel motor drive systemGEN MOTORS CORP·Filed 2004·Granted Aug 28, 2007·62 cites·31 claims
- 3387US7592765B2Method and system for controlling synchronous motor drive systemsGM GLOBAL TECH OPERATIONS INC·Filed 2006·Granted Sep 22, 2009·18 cites·19 claims
- 3486US8860275B2Multi-layer arc-shaped permanent magnet machine with reduced rotational stressKAISER EDWARD L·Filed 2012·Granted Oct 14, 2014·7 cites·15 claims
- 3586US7622877B2Method and system for controlling permanent magnet AC machinesGM GLOBAL TECH OPERATIONS INC·Filed 2007·Granted Nov 24, 2009·16 cites·20 claims
- 3685US9899902B2Pole to pole variation in shape of injection molded magnets of internal permanent magnet machinesGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Feb 20, 2018·3 cites·11 claims
- 3785US9118230B2Interior permanent magnet machineGM GLOBAL TECH OPERATIONS INC·Filed 2013·Granted Aug 25, 2015·6 cites·14 claims
- 3885US8129880B2Concentrated winding machine with magnetic slot wedgesRAHMAN KHWAJA M·Filed 2007·Granted Mar 6, 2012·14 cites·15 claims
- 3985US7847461B2Multi-layer magnet arrangement in a permanent magnet machine for a motorized vehicleGM GLOBAL TECH OPERATIONS INC·Filed 2007·Granted Dec 7, 2010·13 cites·18 claims
- 4084US8174158B2Methods and apparatus for a permanent magnet machine with asymmetrical rotor magnetsRAHMAN KHWAJA M·Filed 2009·Granted May 8, 2012·16 cites·14 claims
- 4184US6684483B2Method of fabricating a rotor for an electric traction motorGEN MOTORS CORP·Filed 2001·Granted Feb 3, 2004·43 cites·8 claims
- 4284US6646407B2Electric motor control having DC-DC converter and method of using sameGEN MOTORS CORP·Filed 2001·Granted Nov 11, 2003·30 cites·16 claims
- 4383US10340761B2Electric device and a stator assembly for the electric deviceGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Jul 2, 2019·3 cites·20 claims
- 4481US8602938B1Multimode electrically variable transmission having a ferrite magnet motor and method of operating the sameCONLON BRENDAN M·Filed 2012·Granted Dec 10, 2013·9 cites·16 claims
- 4580US9755462B2Rotor geometry for interior permanent magnet machine having rare earth magnets with no heavy rare earth elementsGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Sep 5, 2017·2 cites·19 claims
- 4678US8487494B2Interior permanent magnet machine with radially asymmetric magnet configurationJURKOVIC SINISA·Filed 2011·Granted Jul 16, 2013·4 cites·8 claims
- 4778US8138651B2Methods and apparatus for a permanent magnet machine with an added air barrierRAHMAN KHWAJA M·Filed 2008·Granted Mar 20, 2012·13 cites·19 claims
- 4877US10003227B2Axially asymmetric configuration for interior permanent magnet machineGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Jun 19, 2018·2 cites·13 claims
- 4977US8816555B2Rotor for a permanent magnet electric machineZHOU XINYU·Filed 2011·Granted Aug 26, 2014·4 cites·11 claims
- 5077US6617820B2Auxiliary power conversion by phase-controlled rectificationGEN MOTORS CORP·Filed 2001·Granted Sep 9, 2003·33 cites·21 claims
Showing the top 50 of 100 patent records by PatentIndex Score.
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