Inventor
Hiroyuki Yamai
Inventor
Hitachinaka, JP
Overview
Patents· 10 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H02Mprimary
H02MApparatus for conversion between ac and ac, between ac and dc, or between dc and dc, and for use with mains or similar power supply systems38%
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters25%
H02HEmergency protective circuit arrangements13%
B60LPropulsion of electrically-propelled vehicles6%
G01RMeasuring electric variables6%
H05KPrinted circuits6%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h106%
PatentTitleYear
9,246,408'Power conversion apparatus'20168,947,838'Overcurrent fault detection device for electrical drive control system'20158,513,953'Power supply device and method for making decision as to contactor weld of power supply device'20138,395,874'Multiphase current supplying circuit, driving apparatus, compressor, and air conditioner'20137,804,271'Multiphase current supplying circuit, driving apparatus, compressor and air conditioner'20107,633,249'Polyphase current supplying circuit and driving apparatus'20096,208,109'Synchronous motor driving method, compressor driving method, device for the methods, and brushless DC motor driving device'20015,804,939'Brushless D.C. motor driving and controlling method and apparatus therefor and electrical equipment'19985,739,650'Motor system capable of obtaining high efficiency and method for controlling a motor'19984,989,128'Pulse width modulation control unit of inverter'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991–2013Patents assigned to DAIKIN IND LTD (4)· patent assignee history
1991–1998Based in Kusatsu, JP· patent location history
1998Based in Otsu-shi, Shiga, JP· patent location history
2001Based in Okamoto-cho, Kusatsu-shi, Shiga 525-0044, JP· patent location history
2009–2013Based in Shiga, JP· patent location history
2013–2016Patents assigned to YAMAI HIROYUKI (4)· patent assignee history
2013–2016Patents assigned to HITACHI AUTOMOTIVE SYSTEMS LTD (3)· patent assignee history
2013–2015Patents assigned to MYOEN KOHEI (2)· patent assignee history
2013–2016Based in Hitachinaka, JP· patent location history
2015Patents assigned to AKAISHI YOSHIO (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DAIKIN IND LTD | 4 | 1991–2013 |
| YAMAI HIROYUKIself | 4 | 2013–2016 |
| HITACHI AUTOMOTIVE SYSTEMS LTD | 3 | 2013–2016 |
| MYOEN KOHEI | 2 | 2013–2015 |
| AKAISHI YOSHIO | 1 | 2015 |
Locations
| Location | Patents | Span |
|---|---|---|
| Hitachinaka, JP | 3 | 2013–2016 |
| Shiga, JP | 3 | 2009–2013 |
| Kusatsu, JP | 2 | 1991–1998 |
| Okamoto-cho, Kusatsu-shi, Shiga 525-0044, JP | 1 | 2001 |
| Otsu-shi, Shiga, JP | 1 | 1998 |