Inventor · disambiguated record
Hiroyuki Yamai
Also filed as: YAMAI HIROYUKI
11 granted patents·2 pending applications·365 citations·filing 1989–2018
92Inventor score
Top patents by PatentIndex Score
13 records- 0195US8947838B2Overcurrent fault detection device for electrical drive control systemYAMAI HIROYUKI·Filed 2011·Granted Feb 3, 2015·44 cites·9 claims
- 0292US5739650AMotor system capable of obtaining high efficiency and method for controlling a motorDAIKEN IND LTD·Filed 1995·Granted Apr 14, 1998·100 cites·36 claims
- 0388US8513953B2Power supply device and method for making decision as to contactor weld of power supply deviceMYOEN KOHEI·Filed 2010·Granted Aug 20, 2013·24 cites·5 claims
- 0488US6208109B1Synchronous motor driving method, compressor driving method, device for the methods, and brushless DC motor driving deviceFiled 1999·Granted Mar 27, 2001·77 cites·24 claims
- 0585US7633249B2Polyphase current supplying circuit and driving apparatusDAIKIN IND LTD·Filed 2005·Granted Dec 15, 2009·23 cites·15 claims
- 0682US5804939ABrushless D.C. motor driving and controlling method and apparatus therefor and electrical equipmentFiled 1995·Granted Sep 8, 1998·58 cites·17 claims
- 0780US8395874B2Multiphase current supplying circuit, driving apparatus, compressor, and air conditionerYAMAI HIROYUKI·Filed 2005·Granted Mar 12, 2013·20 cites·16 claims
- 0872US9246408B2Power conversion apparatusMAEDA KEN·Filed 2012·Granted Jan 26, 2016·5 cites·16 claims
- 0952US2015106043A1Overcurrent Fault Detection Device for Electrical Drive Control SystemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2014·Application pending·0 cites
- 1050US7804271B2Multiphase current supplying circuit, driving apparatus, compressor and air conditionerDAIKIN IND LTD·Filed 2005·Granted Sep 28, 2010·2 cites·18 claims
- 1145US11798749B2Power converter including filter circuit device to improve a noise suppression functionHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2018·Granted Oct 24, 2023·0 cites·7 claims
- 1243US4989128APulse width modulation control unit of inverterDAIKIN IND LTD·Filed 1989·Granted Jan 29, 1991·12 cites·14 claims
- 1337US2017347485A1Power Conversion DeviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →