Inventor · disambiguated record
Shigehisa Aoyagi
Also filed as: AOYAGI SHIGEHISA
31 granted patents·19 pending applications·71 citations·filing 2005–2023
95Inventor score
Files withHITACHI ASTEMO LTD20HITACHI AUTOMOTIVE SYSTEMS LTD16HITACHI LTD6IWAJI YOSHITAKA3TOBARI KAZUAKI2
Top patents by PatentIndex Score
50 records- 0187US8884575B2Drive system for synchronous electrical motorHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Nov 11, 2014·7 cites·20 claims
- 0286US10411621B2Drive device for three-phase synchronous motorHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Sep 10, 2019·3 cites·18 claims
- 0385US8305019B2Torque controller for permanent magnet synchronous motorTOBARI KAZUAKI·Filed 2010·Granted Nov 6, 2012·8 cites·7 claims
- 0481US8710788B2Brushless motor drive apparatus and drive methodHANO MASAKI·Filed 2011·Granted Apr 29, 2014·5 cites·18 claims
- 0579US9531305B2Inverter apparatusHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2014·Granted Dec 27, 2016·4 cites·12 claims
- 0678US9831814B2Electric motor drive control device, electrically driven power steering device, electrically driven brake device, and electrically driven pump deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2015·Granted Nov 28, 2017·4 cites·10 claims
- 0776US7332882B2Motor drive device that combined charge controllerHITACHI LTD·Filed 2006·Granted Feb 19, 2008·14 cites·13 claims
- 0872US8766575B2Synchronous electric motor drive systemIWAJI YOSHITAKA·Filed 2011·Granted Jul 1, 2014·3 cites·10 claims
- 0971US7388341B2Control system for permanent magnet synchronous motor and moduleHITACHI LTD·Filed 2005·Granted Jun 17, 2008·8 cites·14 claims
- 1070US12512709B2Rotating electric machineHITACHI ASTEMO LTD·Filed 2021·Granted Dec 30, 2025·0 cites·6 claims
- 1169US10348218B2Power conversion device and electric power steering device using the sameHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2015·Granted Jul 9, 2019·2 cites·10 claims
- 1266US12463576B2Inverter control device and inverter control methodHITACHI ASTEMO LTD·Filed 2022·Granted Nov 4, 2025·0 cites·7 claims
- 1366US8878480B2Synchronous motor drive system and synchronous motorIWAJI YOSHITAKA·Filed 2012·Granted Nov 4, 2014·2 cites·6 claims
- 1464US12491774B2Motor control device, electromechanical integrated unit, boost converter system, electric vehicle system, and motor control methodHITACHI ASTEMO LTD·Filed 2021·Granted Dec 9, 2025·0 cites·15 claims
- 1564US7919941B2Semiconductor power converterHITACHI LTD·Filed 2008·Granted Apr 5, 2011·6 cites·16 claims
- 1663US12506419B2Power conversion deviceHITACHI ASTEMO LTD·Filed 2022·Granted Dec 23, 2025·0 cites·7 claims
- 1762US8436563B2Control unit and control method for permanent magnet synchronous motorSUMITA SATOSHI·Filed 2010·Granted May 7, 2013·2 cites·14 claims
- 1858US11611292B2Power conversion deviceHITACHI ASTEMO LTD·Filed 2019·Granted Mar 21, 2023·0 cites·15 claims
- 1957US12513826B2Power semiconductor deviceHITACHI ASTEMO LTD·Filed 2021·Granted Dec 30, 2025·0 cites·4 claims
- 2057US10924048B2Inverter control device, motor drive device, and electric power steering apparatusHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Feb 16, 2021·0 cites·11 claims
- 2157US2025192061A1Semiconductor Module and Power Conversion DeviceHITACHI ASTEMO LTD·Filed 2023·Application pending·0 cites
- 2256US11451179B2Motor control device and brake control deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2018·Granted Sep 20, 2022·0 cites·15 claims
- 2356US2025157937A1Power conversion deviceHITACHI ASTEMO LTD·Filed 2023·Application pending·0 cites
- 2455US2025385159A1Semiconductor Cooling Device, Power Conversion Device, and Method for Manufacturing Semiconductor Cooling DeviceHITACHI ASTEMO LTD·Filed 2023·Application pending·0 cites
- 2554US2025279329A1Semiconductor moduleHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 2653US2025158554A1Motor control device, hybrid system, mechanically and electrically integrated unit, and electric vehicle systemHITACHI ASTEMO LTD·Filed 2023·Application pending·0 cites
- 2753US2024413746A1Power conversion deviceHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 2852US11831265B2Motor control deviceHITACHI ASTEMO LTD·Filed 2019·Granted Nov 28, 2023·0 cites·9 claims
- 2952US2024266920A1Electric motor systemHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 3051US7821223B2Vector controller for a permanent magnet motor and inverter moduleHITACHI LTD·Filed 2007·Granted Oct 26, 2010·2 cites·16 claims
- 3150US10700627B2Power converter and electric power steering apparatusHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Jun 30, 2020·0 cites·10 claims
- 3250US2025192697A1Motor control device and motor control methodHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 3348US2025192713A1Motor control device and motor control methodHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 3448US2024227771A1Motor control device, electromechanical integrated unit, hybrid system, electric power steering system, and motor control methodHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 3547US11325641B2Control device for electric power steering apparatus and electric power steering apparatusHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted May 10, 2022·0 cites·19 claims
- 3647US2025226783A1Motor control device, motor control method, hybrid system, boost converter system, and electric power steering systemHITACHI ASTEMO LTD·Filed 2021·Application pending·0 cites
- 3747US2024244807A1Electric power converterHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 3846US11290036B2Control deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2019·Granted Mar 29, 2022·0 cites·11 claims
- 3945US10511249B2Inverter driving device, electric brake apparatus, and electric power steering apparatusHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Dec 17, 2019·0 cites·8 claims
- 4045US2023198437A1Drive device of synchronous motor and method of driving synchronous motorHITACHI ASTEMO LTD·Filed 2021·Application pending·0 cites
- 4144US8106619B2Position sensorless controller for permanent magnet motorTOBARI KAZUAKI·Filed 2008·Granted Jan 31, 2012·1 cites·2 claims
- 4242US11228271B2Control device for three-phase synchronous motor and electric power steering device using the sameHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2018·Granted Jan 18, 2022·0 cites·21 claims
- 4337US2014077738A1Driving System For Synchronous MotorIWAJI YOSHITAKA·Filed 2011·Application pending·0 cites
- 4436US10745045B2Control device for power steering device, and power steering deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Aug 18, 2020·0 cites·17 claims
- 4536US2009322262A1Controller For Permanent Magnet Synchronous Motor and Motor Control SystemHITACHI LTD·Filed 2009·Application pending·0 cites
- 4635US2007241720A1Inverter systemHITACHI LTD·Filed 2007·Application pending·0 cites
- 4734US2018191283A1Motor Control Device and Electric Power Steering Device Mounting the SameHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Application pending·0 cites
- 4834US2018194388A1Electric Power Converter and Electric Power Steering Apparatus Mounting SameHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Application pending·0 cites
- 4932US2015311835A1Motor driving systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2015·Application pending·0 cites
- 5023US8710781B2Power conversion device and method for controlling thereofARAKAWA YOICHIRO·Filed 2010·Granted Apr 29, 2014·0 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →