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Inventor

Yoshitaka Iwaji

Inventor
Hitachinaka, JP

Overview

58→
Patents
2000–2021
Patent span
Electricity
Primary field (CPC H)

Patents· 58 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H02Pprimary
H02PControl or regulation of electric motors, electric generators or dynamo-electric converters69%
H02KDynamo-electric machines11%
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 systems7%
Y02PClimate change mitigation technologies in the production or processing of goods3%
B60LPropulsion of electrically-propelled vehicles1%
B65HHandling thin or filamentary material, e.g. sheets, webs, cables1%
B66BElevators1%
F04BPositive-displacement machines for liquids1%
G05BControl or regulating systems in general1%
G11BInformation storage based on relative movement between record carrier and transducer1%
PatentTitleYear
10,903,767Synchronous motor control apparatus202110,804,765Electromechanical integral motor202010,658,960Motor control system and motor control method202010,644,627Control device of synchronous electric motor, integrated motor system, pump system, and positioning system202010,608,561Control device of AC motor202010,505,490Motor control system201910,218,252Linear motor and positioning apparatus20199,923,502'Synchronous motor control apparatus and drive system using the same'20189,729,091'Sensorless driving apparatus and sensorless driving method for brushless motor'20179,712,032'Linear motor and linear motor drive system'20179,350,284'Power conversion device'20169,325,264'Electric motor drive device'20169,000,626'Thrust generation mechanism, drive device, XY stage and XYZ stage'20158,884,575'Drive system for synchronous electrical motor'20148,878,480'Synchronous motor drive system and synchronous motor'20148,810,082'Linear motor'20148,766,575'Synchronous electric motor drive system'20148,760,095'Rotator control device, rotator system, vehicle, electric car and electric generation system'20148,742,704'AC motor control device and AC motor driving system'20148,710,788'Brushless motor drive apparatus and drive method'20148,674,647'Drive device for alternating current motor and electric motor vehicle'20148,664,902'Polyphase AC motor, driving device and driving method therefor'20148,541,971'Driving system of permanent magnet synchronous motor'20138,410,735'Torque ripple suppression control device for permanent magnet motor and electric power steering system'20138,362,727'Control device for synchronous motor'20138,258,732'Drive system of synchronous motor'20128,232,751'Drive system of synchronous motor'20128,044,618'Control apparatus for AC motor'20117,919,941'Semiconductor power converter'20117,859,209'Control device for synchronous motor'20107,847,500'Synchronous motor control device'20107,839,663'Converter and power converter that becomes it with the converter'20107,825,620'Controller and constant measuring apparatus for AC motor'20107,808,202'Beat-less controller for permanent magnet motor'20107,791,295'Field weakening control apparatus for permanent magnet motor and electric power steering using same'20107,728,543'Stepping motor controlling device'20107,719,226'Highly responsive permanent magnet motor controller'20107,671,558'Induction motor controller'20107,560,896'Vector control apparatus for permanent magnet motor'20097,471,525'Converter and power converter that becomes it with the converter'20087,388,341'Control system for permanent magnet synchronous motor and module'20087,276,876'Synchronous motor driving apparatus'20077,271,557'AC motor driving apparatus and method of controlling the same'20077,075,266'Apparatus for controlling an a. c. motor'20067,064,514'Motor drive system for AC motors'20067,030,589'Driving systems of AC motor'20067,002,274'Rotary electric machine and automobile provided with the same'20066,771,039'Motor control apparatus and method'20046,690,137'Sensorless control system for synchronous motor'20046,650,081'Synchronous motor driving system'20036,639,377'Driving device for synchronous motor'20036,628,099'Synchronous motor driving system and sensorless control method for a synchronous motor'20036,614,137'Linear motor, driving and control system thereof and manufacturing method thereof'20036,570,358'Control apparatus for alternating-current motor'20036,531,843'Driving system of AC motor'20036,310,456'Control system and method'20016,225,774'Motor control method and motor control system'20016,043,624'Motor control method and motor control system'2000

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2000–2020Patents assigned to HITACHI LTD (34)· patent assignee history
2000–2017Based in Hitachi, JP· patent location history
2004–2021Based in Tokyo, JP· patent location history
2006–2013Patents assigned to HITACHI IND EQUIPMENT SYS (7)· patent assignee history
2006–2019Based in Hitachinaka, JP· patent location history
2012–2019Patents assigned to IWAJI YOSHITAKA (16)· patent assignee history
2013–2014Patents assigned to NAKATSUGAWA JUNNOSUKE (4)· patent assignee history
2014–2020Patents assigned to HITACHI AUTOMOTIVE SYSTEMS LTD (7)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI LTD342000–2020
IWAJI YOSHITAKAself162012–2019
HITACHI AUTOMOTIVE SYSTEMS LTD72014–2020
HITACHI IND EQUIPMENT SYS72006–2013
NAKATSUGAWA JUNNOSUKE42013–2014
Locations
LocationPatentsSpan
Hitachinaka, JP332006–2019
Hitachi, JP142000–2017
Tokyo, JP112004–2021