Inventor
BANDO AKIRA
JP36 patents
⚠️ This page may combine multiple inventors who share the name “BANDO AKIRA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
18 patentsUS4754156AJun 28, 1988
Control apparatus for variable-speed hydraulic power generating system
HITACHI LTD66 citations95
US4694189ASep 15, 1987
Control system for variable speed hydraulic turbine generator apparatus
HITACHI LTD85 citations94
US6389041B1May 14, 2002
Synchronization system and synchronization method of multisystem control apparatus
HITACHI LTD31 citations92
US4823018AApr 18, 1989
Control system for variable speed water-wheel generator apparatus
HITACHI LTD37 citations92
US4952852AAug 28, 1990
Power system and synchronizing breakers for a variable speed generator motor system
HITACHI LTD48 citations91
US4743827AMay 10, 1988
Variable speed pumping-up electrical power system
HITACHI LTD28 citations91
US5099409AMar 24, 1992
Semiconductor electric power conversion system enabling fault and/or overtemperature protection
HITACHI LTD20 citations80
US6038683AMar 14, 2000
Replicated controller and fault recovery method thereof
HITACHI LTD15 citations73
US5265002ANov 23, 1993
Fault protection for a multiphase bridge power converter
HITACHI LTD15 citations72
US4766360AAug 23, 1988
Induction generator/motor system
HITACHI LTD9 citations72
US4980629ADec 25, 1990
AC-excited generator/motor apparatus
HITACHI LTD13 citations70
US5148093ASep 15, 1992
System for controlling AC excited synchronous machine
HITACHI LTD12 citations68
US9166492B2Oct 20, 2015
Multilevel voltage source converter and method for balancing capacitors
HITACHI LTD2 citations62
US7158521B2Jan 2, 2007
Synchronization system and synchronization method of multisystem control apparatus
HITACHI LTD3 citations62
US4743826AMay 10, 1988
Pumping-up generator/motor system and method of operation of the same
HITACHI LTD4 citations60
US9219426B2Dec 22, 2015
Switching element, power converter, direct current transmission system, current control device, method of controlling power converter, and method of controlling current in voltage source converter
HITACHI LTD0 citations50
US9573489B2Feb 21, 2017
Control device for railway power conditioner and control system for railway power conditioner
HITACHI LTD0 citations45
US7555627B2Jun 30, 2009
Input-output control apparatus, input-output control method, process control apparatus and process control method
HITACHI LTD0 citations39
HITACHI MITSUBISHI HYDRO CORPORATION
7 patentsUS10536104B2Jan 14, 2020
Variable speed generator-motor apparatus and variable speed generator-motor system
HITACHI MITSUBISHI HYDRO CORPORATION14 citations85
US10784808B2Sep 22, 2020
Variable speed generator-motor apparatus and variable speed generator-motor system
HITACHI MITSUBISHI HYDRO CORPORATION7 citations83
US11223310B2Jan 11, 2022
Variable speed generator/motor device
HITACHI MITSUBISHI HYDRO CORPORATION4 citations69
US12289063B2Apr 29, 2025
Modular multilevel power converter and variable speed generator-motor
HITACHI MITSUBISHI HYDRO CORPORATION2 citations59
US11942873B2Mar 26, 2024
Secondary magnetic excitation generator-motor device
HITACHI MITSUBISHI HYDRO CORPORATION0 citations51
US12355377B2Jul 8, 2025
Adjustable speed generator motor system with full power converter
HITACHI MITSUBISHI HYDRO CORPORATION0 citations49
US12237789B2Feb 25, 2025
Modular multilevel converter and modular multilevel converter system
HITACHI MITSUBISHI HYDRO CORPORATION0 citations38
BANDO AKIRA
4 patentsUS8896261B2Nov 25, 2014
Doubly-fed generator and doubly-fed electric machine
BANDO AKIRA17 citations82
US8867247B2Oct 21, 2014
DC/AC power converter with DC side double frequency pulsation suppression caused by AC side faults
BANDO AKIRA2 citations60
US8161362B2Apr 17, 2012
Task management control apparatus and method, having redundant processing comparison
BANDO AKIRA2 citations59
US8541292B2Sep 24, 2013
Group III nitride semiconductor epitaxial substrate and method for manufacturing the same
BANDO AKIRA1 citations51