Inventor · disambiguated record
Kazuaki Tobari
Also filed as: TOBARI KAZUAKI
47 granted patents·9 pending applications·359 citations·filing 1988–2024
98Inventor score
Files withHITACHI LTD18HITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD16HITACHI IND EQUIPMENT SYS5TOBARI KAZUAKI5HITACHI ASTEMO LTD4
Top patents by PatentIndex Score
56 records- 0193US7619385B2Motor controller, washing machine, air conditioner and electric oil pumpHITACHI LTD·Filed 2006·Granted Nov 17, 2009·30 cites·19 claims
- 0292US4869334AElectric motor-driven power steering apparatusHITACHI LTD·Filed 1988·Granted Sep 26, 1989·70 cites·17 claims
- 0391US7825620B2Controller and constant measuring apparatus for AC motorHITACHI LTD·Filed 2007·Granted Nov 2, 2010·25 cites·10 claims
- 0487US8884575B2Drive system for synchronous electrical motorHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Nov 11, 2014·7 cites·20 claims
- 0585US8305019B2Torque controller for permanent magnet synchronous motorTOBARI KAZUAKI·Filed 2010·Granted Nov 6, 2012·8 cites·7 claims
- 0684US11777427B2Motor control device and automatic adjustment method for sameHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2020·Granted Oct 3, 2023·2 cites·14 claims
- 0784US8044618B2Control apparatus for AC motorHITACHI LTD·Filed 2008·Granted Oct 25, 2011·15 cites·14 claims
- 0880US7521887B2Vector controller for a permanent magnet synchronous motor, inverter module, and permanent magnet synchronous motor constant display systemHITACHI LTD·Filed 2006·Granted Apr 21, 2009·12 cites·13 claims
- 0978US11196377B2Motor drive systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2018·Granted Dec 7, 2021·2 cites·9 claims
- 1076US8410735B2Torque ripple suppression control device for permanent magnet motor and electric power steering systemTOBARI KAZUAKI·Filed 2011·Granted Apr 2, 2013·4 cites·17 claims
- 1176US5016158AParallel multi-inverter system and motor drive system using the sameHITACHI LTD·Filed 1990·Granted May 14, 1991·48 cites·3 claims
- 1275US7808202B2Beat-less controller for permanent magnet motorHITACHI IND EQUIPMENT SYS·Filed 2007·Granted Oct 5, 2010·10 cites·10 claims
- 1374US8531148B2Control apparatus and control method for AC electric motorSUMITA SATOSHI·Filed 2011·Granted Sep 10, 2013·4 cites·11 claims
- 1472US12445074B2Synchronous machine control device, synchronous machine control method, and electric vehicleHITACHI ASTEMO LTD·Filed 2021·Granted Oct 14, 2025·0 cites·14 claims
- 1572US8766575B2Synchronous electric motor drive systemIWAJI YOSHITAKA·Filed 2011·Granted Jul 1, 2014·3 cites·10 claims
- 1671US11239784B2Motor drive device, controller, and electric vehicle systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2019·Granted Feb 1, 2022·1 cites·11 claims
- 1771US7388341B2Control system for permanent magnet synchronous motor and moduleHITACHI LTD·Filed 2005·Granted Jun 17, 2008·8 cites·14 claims
- 1869US7075266B2Apparatus for controlling an a. c. motorHITACHI LTD·Filed 2004·Granted Jul 11, 2006·16 cites·18 claims
- 1968US6670786B2Apparatus for controlling an induction motorHITACHI LTD·Filed 2001·Granted Dec 30, 2003·13 cites·32 claims
- 2066US9698716B2Motor control device and work machine using the sameTOBARI KAZUAKI·Filed 2012·Granted Jul 4, 2017·3 cites·4 claims
- 2166US8878480B2Synchronous motor drive system and synchronous motorIWAJI YOSHITAKA·Filed 2012·Granted Nov 4, 2014·2 cites·6 claims
- 2266US7791295B2Field weakening control apparatus for permanent magnet motor and electric power steering using sameHITACHI LTD·Filed 2008·Granted Sep 7, 2010·6 cites·30 claims
- 2366US7719226B2Highly responsive permanent magnet motor controllerHITACHI IND EQUIPMENT SYS·Filed 2007·Granted May 18, 2010·6 cites·6 claims
- 2466US7528568B2Vector controller for permanent magnet synchronous motorHITACHI LTD·Filed 2006·Granted May 5, 2009·6 cites·14 claims
- 2565US11437944B2Power conversion deviceHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2019·Granted Sep 6, 2022·0 cites·15 claims
- 2665US6954050B2Control method and control device of permanent-magnet type synchronous motorHITACHI IND EQUIPMENT SYS·Filed 2004·Granted Oct 11, 2005·14 cites·20 claims
- 2764US7919941B2Semiconductor power converterHITACHI LTD·Filed 2008·Granted Apr 5, 2011·6 cites·16 claims
- 2864US7443120B2Field weakening vector controller for permanent magnet synchronous motor and control moduleHITACHI LTD·Filed 2006·Granted Oct 28, 2008·5 cites·12 claims
- 2963US11831262B2Motor control deviceHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2020·Granted Nov 28, 2023·0 cites·12 claims
- 3063US8779701B2Control apparatus for permanent magnet motorTOBARI KAZUAKI·Filed 2011·Granted Jul 15, 2014·2 cites·12 claims
- 3162US8436563B2Control unit and control method for permanent magnet synchronous motorSUMITA SATOSHI·Filed 2010·Granted May 7, 2013·2 cites·14 claims
- 3261US11575338B2Power conversion deviceHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2020·Granted Feb 7, 2023·0 cites·14 claims
- 3360US6344726B1Method of controlling an induction motorHITACHI LTD·Filed 2000·Granted Feb 5, 2002·9 cites·32 claims
- 3459US7602138B2Driving apparatus and driving system for electric motorHITACHI IND EQUIPMENT SYS·Filed 2006·Granted Oct 13, 2009·4 cites·5 claims
- 3558US11424707B2Power conversion apparatusHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2018·Granted Aug 23, 2022·0 cites·13 claims
- 3656US12341448B2Power conversion deviceHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2022·Granted Jun 24, 2025·0 cites·6 claims
- 3756US12341447B2Power conversion deviceHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2021·Granted Jun 24, 2025·0 cites·13 claims
- 3854US12334847B2Power converter apparatusHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2021·Granted Jun 17, 2025·0 cites·8 claims
- 3954US10903767B2Synchronous motor control apparatusHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2018·Granted Jan 26, 2021·0 cites·7 claims
- 4053US11303236B2Induction motor overheat monitoring method, induction motor monitoring device, and induction motor control systemHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2018·Granted Apr 12, 2022·0 cites·13 claims
- 4152US8344671B2Speed controller of magnetic motorHITACHI IND EQUIPMENT SYS·Filed 2009·Granted Jan 1, 2013·3 cites·13 claims
- 4252US2025141381A1Synchronous machine control device, synchronous machine control method, and electric vehicleHITACHI ASTEMO LTD·Filed 2023·Application pending·0 cites
- 4352US2025183827A1Motor control device and electric vehicleHITACHI ASTEMO LTD·Filed 2023·Application pending·0 cites
- 4452US2025147563A1Power conversion deviceHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2024·Application pending·0 cites
- 4551US7821223B2Vector controller for a permanent magnet motor and inverter moduleHITACHI LTD·Filed 2007·Granted Oct 26, 2010·2 cites·16 claims
- 4649US7148651B2Apparatus and method for controlling AC motor and module thereforHITACHI LTD·Filed 2004·Granted Dec 12, 2006·8 cites·6 claims
- 4748US2025158548A1Power Conversion DeviceHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2023·Application pending·0 cites
- 4847US2025062708A1Power ConverterHITACHI INDUSTRY EQUIPMENT SYSTEMS CO LTD·Filed 2023·Application pending·0 cites
- 4946US7560896B2Vector control apparatus for permanent magnet motorHITACHI LTD·Filed 2007·Granted Jul 14, 2009·2 cites·14 claims
- 5046US2024356470A1Synchronous-motor control device and electric vehicleHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
Showing the top 50 of 56 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →