Inventor · disambiguated record
Yasuhiro Kiyofuji
Also filed as: KIYOFUJI YASUHIRO
15 granted patents·4 pending applications·133 citations·filing 2000–2021
91Inventor score
Files withHITACHI LTD11BANDO AKIRA2HITACHI MITSUBISHI HYDRO CORPORATION2FUNAKI SATORU1SHIMADA KEIZO1
Top patents by PatentIndex Score
19 records- 0194US8896261B2Doubly-fed generator and doubly-fed electric machineBANDO AKIRA·Filed 2012·Granted Nov 25, 2014·17 cites·20 claims
- 0293US7888894B2Electric motor control system, series hybrid vehicle, electric motor control apparatus, and electric motor control methodHITACHI LTD·Filed 2008·Granted Feb 15, 2011·55 cites·27 claims
- 0383US12289063B2Modular multilevel power converter and variable speed generator-motorHITACHI MITSUBISHI HYDRO CORPORATION·Filed 2020·Granted Apr 29, 2025·2 cites·6 claims
- 0476US7841434B2Electric drive system for vehicle, electric control system for vehicle, electric drive method for vehicleHITACHI LTD·Filed 2009·Granted Nov 30, 2010·11 cites·2 claims
- 0571US8386862B2Fault diagnosis apparatus and fault diagnosis method of multi-channel analog input/output circuitHITACHI LTD·Filed 2010·Granted Feb 26, 2013·4 cites·4 claims
- 0668US6304468B2Phase synchronization system for connecting a power converter to a power distribution systemHITACHI LTD·Filed 2000·Granted Oct 16, 2001·23 cites·8 claims
- 0765US7643317B2Power converting device and method for controlling the sameHITACHI LTD·Filed 2007·Granted Jan 5, 2010·7 cites·21 claims
- 0865US7315144B2AC drive apparatus, vehicle control apparatus, and power conversion method and vehicle control methodHITACHI LTD·Filed 2006·Granted Jan 1, 2008·9 cites·21 claims
- 0965US6839696B1Guarantee charge processing method and apparatusHITACHI LTD·Filed 2000·Granted Jan 4, 2005·1 cites·13 claims
- 1064US9252684B2Power conversion apparatus and high-voltage DC transmission systemHITACHI LTD·Filed 2014·Granted Feb 2, 2016·2 cites·20 claims
- 1161US8867247B2DC/AC power converter with DC side double frequency pulsation suppression caused by AC side faultsBANDO AKIRA·Filed 2012·Granted Oct 21, 2014·2 cites·3 claims
- 1261US2005073201A1Guarantee charge processing method and apparatusFiled 2004·Application pending·0 cites
- 1346US2014167701A1Power Converter and its Control MethodHITACHI LTD·Filed 2013·Application pending·0 cites
- 1445US9573489B2Control device for railway power conditioner and control system for railway power conditionerHITACHI LTD·Filed 2013·Granted Feb 21, 2017·0 cites·13 claims
- 1544US12355377B2Adjustable speed generator motor system with full power converterHITACHI MITSUBISHI HYDRO CORPORATION·Filed 2021·Granted Jul 8, 2025·0 cites·10 claims
- 1642US9208037B2Duplexed operation processor control system, and duplexed operation processor control methodSHIMIZU TOSHIKI·Filed 2009·Granted Dec 8, 2015·0 cites·7 claims
- 1741US2014078796A1Power Conversion Apparatus and Control Method ThereofHITACHI LTD·Filed 2013·Application pending·0 cites
- 1839US2006086547A1Electric drive system for vehicle, electric control system for vehicle, electric drive method for vehicleSHIMADA KEIZO·Filed 2005·Application pending·0 cites
- 1931US8255769B2Control apparatus and control methodFUNAKI SATORU·Filed 2010·Granted Aug 28, 2012·0 cites·9 claims
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