Inventor · disambiguated record
Yoshitaka Iwaji
Also filed as: IWAJI YOSHITAKA
68 granted patents·9 pending applications·793 citations·filing 1998–2022
99Inventor score
Files withHITACHI LTD30IWAJI YOSHITAKA9HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD8HITACHI AUTOMOTIVE SYSTEMS LTD7HITACHI IND EQUIPMENT SYS5
Top patents by PatentIndex Score
77 records- 0196US8674647B2Drive device for alternating current motor and electric motor vehicleIWAJI YOSHITAKA·Filed 2011·Granted Mar 18, 2014·18 cites·16 claims
- 0295US6690137B2Sensorless control system for synchronous motorHITACHI LTD·Filed 2002·Granted Feb 10, 2004·74 cites·23 claims
- 0393US8541971B2Driving system of permanent magnet synchronous motorSAKAI TOSHIFUMI·Filed 2010·Granted Sep 24, 2013·22 cites·20 claims
- 0493US7271557B2AC motor driving apparatus and method of controlling the sameHITACHI LTD·Filed 2006·Granted Sep 18, 2007·33 cites·20 claims
- 0593US6628099B2Synchronous motor driving system and sensorless control method for a synchronous motorHITACHI LTD·Filed 2002·Granted Sep 30, 2003·45 cites·7 claims
- 0692US7471525B2Converter and power converter that becomes it with the converterHITACHI APPLIANCES INC·Filed 2005·Granted Dec 30, 2008·38 cites·3 claims
- 0792US6531843B2Driving system of AC motorHITACHI LTD·Filed 2001·Granted Mar 11, 2003·55 cites·21 claims
- 0891US7825620B2Controller and constant measuring apparatus for AC motorHITACHI LTD·Filed 2007·Granted Nov 2, 2010·25 cites·10 claims
- 0991US6639377B2Driving device for synchronous motorHITACHI LTD·Filed 2001·Granted Oct 28, 2003·51 cites·13 claims
- 1090US6043624AMotor control method and motor control systemHITACHI LTD·Filed 1998·Granted Mar 28, 2000·58 cites·9 claims
- 1189US8760095B2Rotator control device, rotator system, vehicle, electric car and electric generation systemIWAJI YOSHITAKA·Filed 2011·Granted Jun 24, 2014·10 cites·22 claims
- 1287US8884575B2Drive system for synchronous electrical motorHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Nov 11, 2014·7 cites·20 claims
- 1386US8258732B2Drive system of synchronous motorIWAJI YOSHITAKA·Filed 2009·Granted Sep 4, 2012·17 cites·9 claims
- 1486US7064514B2Motor drive system for AC motorsHITACHI HOME & LIFE SOLUTIONS·Filed 2004·Granted Jun 20, 2006·35 cites·17 claims
- 1586US6570358B2Control apparatus for alternating-current motorHITACHI LTD·Filed 2001·Granted May 27, 2003·34 cites·7 claims
- 1684US8044618B2Control apparatus for AC motorHITACHI LTD·Filed 2008·Granted Oct 25, 2011·15 cites·14 claims
- 1783US8232751B2Drive system of synchronous motorIWAJI YOSHITAKA·Filed 2009·Granted Jul 31, 2012·14 cites·9 claims
- 1881US8742704B2AC motor control device and AC motor driving systemNAKATSUGAWA JUNNOSUKE·Filed 2010·Granted Jun 3, 2014·6 cites·27 claims
- 1981US8710788B2Brushless motor drive apparatus and drive methodHANO MASAKI·Filed 2011·Granted Apr 29, 2014·5 cites·18 claims
- 2080US10644627B2Control device of synchronous electric motor, integrated motor system, pump system, and positioning systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted May 5, 2020·2 cites·16 claims
- 2179US7839663B2Converter and power converter that becomes it with the converterHITACHI APPLIANCES INC·Filed 2008·Granted Nov 23, 2010·13 cites·12 claims
- 2279US7276876B2Synchronous motor driving apparatusHITACHI IND EQUIPMENT SYS·Filed 2005·Granted Oct 2, 2007·12 cites·20 claims
- 2378US11196377B2Motor drive systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2018·Granted Dec 7, 2021·2 cites·9 claims
- 2477US6650081B2Synchronous motor driving systemHITACHI LTD·Filed 2002·Granted Nov 18, 2003·20 cites·26 claims
- 2576US8410735B2Torque ripple suppression control device for permanent magnet motor and electric power steering systemTOBARI KAZUAKI·Filed 2011·Granted Apr 2, 2013·4 cites·17 claims
- 2675US8810082B2Linear motorAOYAMA YASUAKI·Filed 2009·Granted Aug 19, 2014·7 cites·18 claims
- 2775US7808202B2Beat-less controller for permanent magnet motorHITACHI IND EQUIPMENT SYS·Filed 2007·Granted Oct 5, 2010·10 cites·10 claims
- 2875US6771039B2Motor control apparatus and methodHITACHI LTD·Filed 2002·Granted Aug 3, 2004·20 cites·14 claims
- 2973US9325264B2Electric motor drive deviceIWAJI YOSHITAKA·Filed 2012·Granted Apr 26, 2016·3 cites·15 claims
- 3073US7859209B2Control device for synchronous motorRENESAS ELECTRONICS CORP·Filed 2007·Granted Dec 28, 2010·7 cites·8 claims
- 3172US8766575B2Synchronous electric motor drive systemIWAJI YOSHITAKA·Filed 2011·Granted Jul 1, 2014·3 cites·10 claims
- 3271US7388341B2Control system for permanent magnet synchronous motor and moduleHITACHI LTD·Filed 2005·Granted Jun 17, 2008·8 cites·14 claims
- 3370US9712032B2Linear motor and linear motor drive systemHITACHI LTD·Filed 2013·Granted Jul 18, 2017·2 cites·16 claims
- 3470US8362727B2Control device for synchronous motorRENESAS ELECTRONICS CORP·Filed 2010·Granted Jan 29, 2013·2 cites·16 claims
- 3569US10608561B2Control device of AC motorHITACHI LTD·Filed 2015·Granted Mar 31, 2020·2 cites·7 claims
- 3669US10505490B2Motor control systemHITACHI LTD·Filed 2016·Granted Dec 10, 2019·1 cites·11 claims
- 3769US7075266B2Apparatus for controlling an a. c. motorHITACHI LTD·Filed 2004·Granted Jul 11, 2006·16 cites·18 claims
- 3868US6614137B2Linear motor, driving and control system thereof and manufacturing method thereofHITACHI LTD·Filed 2001·Granted Sep 2, 2003·14 cites·28 claims
- 3967US7671558B2Induction motor controllerHITACHI IND EQUIPMENT SYS·Filed 2007·Granted Mar 2, 2010·6 cites·13 claims
- 4067US7002274B2Rotary electric machine and automobile provided with the sameHITACHI LTD·Filed 2003·Granted Feb 21, 2006·13 cites·18 claims
- 4166US8878480B2Synchronous motor drive system and synchronous motorIWAJI YOSHITAKA·Filed 2012·Granted Nov 4, 2014·2 cites·6 claims
- 4266US7791295B2Field weakening control apparatus for permanent magnet motor and electric power steering using sameHITACHI LTD·Filed 2008·Granted Sep 7, 2010·6 cites·30 claims
- 4366US7719226B2Highly responsive permanent magnet motor controllerHITACHI IND EQUIPMENT SYS·Filed 2007·Granted May 18, 2010·6 cites·6 claims
- 4465US11437944B2Power conversion deviceHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2019·Granted Sep 6, 2022·0 cites·15 claims
- 4564US7919941B2Semiconductor power converterHITACHI LTD·Filed 2008·Granted Apr 5, 2011·6 cites·16 claims
- 4662US9729091B2Sensorless driving apparatus and sensorless driving method for brushless motorHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Aug 8, 2017·1 cites·18 claims
- 4761US12061236B2Power conversion device, rotating machine system, and diagnosis methodHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2019·Granted Aug 13, 2024·0 cites·11 claims
- 4861US7030589B2Driving systems of AC motorHITACHI IND EQUIPMENT SYS·Filed 2004·Granted Apr 18, 2006·11 cites·20 claims
- 4961US6225774B1Motor control method and motor control systemHITACHI LTD·Filed 1999·Granted May 1, 2001·18 cites·6 claims
- 5060US7847500B2Synchronous motor control deviceRENESAS TECH CORP·Filed 2007·Granted Dec 7, 2010·4 cites·7 claims
Showing the top 50 of 77 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →