Inventor · disambiguated record
Hidefumi Shirahama
Also filed as: SHIRAHAMA HIDEFUMI
12 granted patents·644 citations·filing 1990–2010
93Inventor score
Top patents by PatentIndex Score
12 records- 0196US5297015APower supply control systemHITACHI LTD·Filed 1990·Granted Mar 22, 1994·170 cites·27 claims
- 0293US5446645AInverter apparatus and uinterruptible power supply using the sameHITACHI LTD·Filed 1993·Granted Aug 29, 1995·279 cites·4 claims
- 0390US8035330B2Apparatus and method for driving synchronous motorHITACHI LTD·Filed 2010·Granted Oct 11, 2011·8 cites·22 claims
- 0489US7839113B2Apparatus and method for driving synchronous motorHITACHI LTD·Filed 2008·Granted Nov 23, 2010·19 cites·23 claims
- 0587US7342378B2System and method for driving synchronous motorHITACHI LTD·Filed 2006·Granted Mar 11, 2008·21 cites·11 claims
- 0676US7332882B2Motor drive device that combined charge controllerHITACHI LTD·Filed 2006·Granted Feb 19, 2008·14 cites·13 claims
- 0773US5115386ACircuit for controlling an electric power supply apparatus, a method therefor and an uninterruptible power supplyHITACHI LTD·Filed 1990·Granted May 19, 1992·48 cites·20 claims
- 0869US7075266B2Apparatus for controlling an a. c. motorHITACHI LTD·Filed 2004·Granted Jul 11, 2006·16 cites·18 claims
- 0965US8421395B2Synchronous motor and control method of synchronous motorMAEDA DAISUKE·Filed 2009·Granted Apr 16, 2013·6 cites·8 claims
- 1065US6954050B2Control method and control device of permanent-magnet type synchronous motorHITACHI IND EQUIPMENT SYS·Filed 2004·Granted Oct 11, 2005·14 cites·20 claims
- 1164US5262935AParallel inverter control apparatusHITACHI LTD·Filed 1991·Granted Nov 16, 1993·41 cites·13 claims
- 1249US7148651B2Apparatus and method for controlling AC motor and module thereforHITACHI LTD·Filed 2004·Granted Dec 12, 2006·8 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →