Inventor
AJIMA TOSHIYUKI
JP48 patents
⚠️ This page may combine multiple inventors who share the name “AJIMA TOSHIYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI AUTOMOTIVE SYSTEMS LTD
18 patentsUS10411621B2Sep 10, 2019
Drive device for three-phase synchronous motor
HITACHI AUTOMOTIVE SYSTEMS LTD3 citations73
US9610972B2Apr 4, 2017
Inverter device
HITACHI AUTOMOTIVE SYSTEMS LTD2 citations73
US11356037B2Jun 7, 2022
Inverter control device, inverter control method, inverter control program
HITACHI AUTOMOTIVE SYSTEMS LTD2 citations72
US9831814B2Nov 28, 2017
Electric motor drive control device, electrically driven power steering device, electrically driven brake device, and electrically driven pump device
HITACHI AUTOMOTIVE SYSTEMS LTD4 citations72
US9819299B2Nov 14, 2017
Inverter device and electric vehicle
HITACHI AUTOMOTIVE SYSTEMS LTD5 citations72
US9531305B2Dec 27, 2016
Inverter apparatus
HITACHI AUTOMOTIVE SYSTEMS LTD4 citations72
US9180852B2Nov 10, 2015
Electric booster
HITACHI AUTOMOTIVE SYSTEMS LTD4 citations70
US11196377B2Dec 7, 2021
Motor drive system
HITACHI AUTOMOTIVE SYSTEMS LTD2 citations69
US11967912B2Apr 23, 2024
Motor control device and electric brake device including the same
HITACHI AUTOMOTIVE SYSTEMS LTD0 citations63
US11932224B2Mar 19, 2024
Brake control device and brake system
HITACHI AUTOMOTIVE SYSTEMS LTD1 citations61
US11958459B2Apr 16, 2024
Brake system
HITACHI AUTOMOTIVE SYSTEMS LTD1 citations60
US11451179B2Sep 20, 2022
Motor control device and brake control device
HITACHI AUTOMOTIVE SYSTEMS LTD0 citations52
US11325641B2May 10, 2022
Control device for electric power steering apparatus and electric power steering apparatus
HITACHI AUTOMOTIVE SYSTEMS LTD0 citations52
US11228271B2Jan 18, 2022
Control device for three-phase synchronous motor and electric power steering device using the same
HITACHI AUTOMOTIVE SYSTEMS LTD0 citations52
US10826410B2Nov 3, 2020
Inverter device and electric vehicle
HITACHI AUTOMOTIVE SYSTEMS LTD0 citations48
US11374505B2Jun 28, 2022
Inverter device for performing a power conversion operation to convert DC power to AC power
HITACHI AUTOMOTIVE SYSTEMS LTD0 citations42
US10873285B2Dec 22, 2020
Inverter drive device and electrically driven vehicle system using the same
HITACHI AUTOMOTIVE SYSTEMS LTD0 citations40
US10511249B2Dec 17, 2019
Inverter driving device, electric brake apparatus, and electric power steering apparatus
HITACHI AUTOMOTIVE SYSTEMS LTD0 citations39
HITACHI ASTEMO LTD
14 patentsUS12074542B2Aug 27, 2024
Motor control device, electromechanical integrated unit, and electric vehicle system
HITACHI ASTEMO LTD2 citations73
US12212255B2Jan 28, 2025
Electric motor control device, vehicle, and electric motor control method
HITACHI ASTEMO LTD0 citations62
US11984821B2May 14, 2024
Inverter control device
HITACHI ASTEMO LTD0 citations62
US11558000B2Jan 17, 2023
Motor control device and electric vehicle system using the same
HITACHI ASTEMO LTD1 citations62
US12491774B2Dec 9, 2025
Motor control device, electromechanical integrated unit, boost converter system, electric vehicle system, and motor control method
HITACHI ASTEMO LTD0 citations61
US12074551B2Aug 27, 2024
Motor control device, electromechanical unit, electric vehicle system, and motor control method
HITACHI ASTEMO LTD1 citations61
US11967915B2Apr 23, 2024
Motor control device, motor control method, hybrid system, boost converter system and electric power steering system
HITACHI ASTEMO LTD1 citations61
US12445074B2Oct 14, 2025
Synchronous machine control device, synchronous machine control method, and electric vehicle
HITACHI ASTEMO LTD0 citations60
US11646690B2May 9, 2023
Motor control device and electric vehicle system
HITACHI ASTEMO LTD0 citations60
US11611292B2Mar 21, 2023
Power conversion device
HITACHI ASTEMO LTD0 citations58
US12170497B2Dec 17, 2024
Inverter control device and electric vehicle system
HITACHI ASTEMO LTD0 citations51
US12149183B2Nov 19, 2024
Inverter control device and electric vehicle system
HITACHI ASTEMO LTD0 citations51
US12592657B2Mar 31, 2026
Synchronous machine control device, synchronous machine control method, and electric vehicle
HITACHI ASTEMO LTD0 citations50
US12395108B2Aug 19, 2025
Motor drive device and electric vehicle system
HITACHI ASTEMO LTD0 citations50
HITACHI LTD
10 patentsUS7294988B2Nov 13, 2007
Synchronous motor drive unit and a driving method thereof
HITACHI LTD88 citations97
US7161323B2Jan 9, 2007
Motor drive apparatus, electric actuator and electric power steering apparatus
HITACHI LTD97 citations97
US5243732ASep 14, 1993
Vacuum cleaner with fuzzy logic control
HITACHI LTD142 citations97
US7271557B2Sep 18, 2007
AC motor driving apparatus and method of controlling the same
HITACHI LTD33 citations92
US5381584AJan 17, 1995
Vacuum cleaner
HITACHI LTD27 citations91
US7746023B2Jun 29, 2010
Position detecting device and synchronous motor driving device using the same
HITACHI LTD46 citations90
US6950276B2Sep 27, 2005
Disk drive motor and disk drive storage device incorporating same
HITACHI LTD8 citations74
US7414376B2Aug 19, 2008
Motor drive apparatus and method and electrically driven brake apparatus
HITACHI LTD4 citations63
US6943984B2Sep 13, 2005
Magnetic disc apparatus having stator structure with reduced distortion
HITACHI LTD4 citations63
US12301071B2May 13, 2025
Motor control device, mechatronic unit, power generation system, boost converter system, and electric vehicle system
HITACHI LTD0 citations52