Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Kiyofuji; Yasuhiro
Address:
Hitachi, JP
No. of patents:
7
Patents:












Patent Number Title Of Patent Date Issued
8255769 Control apparatus and control method August 28, 2012
A failure is detected immediately and certainly, and continuation of processing in an unstable state is prevented. A first error detection code is generated from first information which is output as a result of execution of a predetermined program conducted by a first processor. A se
7888894 Electric motor control system, series hybrid vehicle, electric motor control apparatus, and elec February 15, 2011
An electric motor control system including a generator, an AC motor, a power converter for driving the AC motor using a DC output voltage of the generator, and an electric motor controller for controlling the power converter. The electric motor controller controls the power converter by
7841434 Electric drive system for vehicle, electric control system for vehicle, electric drive method fo November 30, 2010
In an electric drive system for a vehicle, an alternator is driven by an engine to generate electric power which is used to drive a motor to generate a driving force. During a retardation of the vehicle, the motor is operated as an alternator to convert kinetic energy to electric energy
7643317 Power converting device and method for controlling the same January 5, 2010
In a system to which a fluctuating load is connected, compensating for fluctuation in voltage harmonics at the load connecting point and fluctuation in system current harmonics has been difficult for a power converting device connected in parallel with the load. To resolve the proble
7315144 AC drive apparatus, vehicle control apparatus, and power conversion method and vehicle control m January 1, 2008
A motor is driven with variable frequency AC power converted from DC power, and an AC output power from the motor is converted to DC. In the conversion, an electromotive force regenerated by the motor is consumed by a plurality of resistors. When the consumption of the electromotive
6839696 Guarantee charge processing method and apparatus January 4, 2005
The operation-state data of the uninterruptible power supply unit for the operation time of the uninterruptible power supply unit (UPS) deployed between the load facility and the commercial power source and used for the uninterruptible operation is provided, the guarantee charge dependen
6304468 Phase synchronization system for connecting a power converter to a power distribution system October 16, 2001
A power converter system includes: a circuit breaker having one terminal connected to a power system and another terminal connected to a load; a transformer for interconnection; a power converter; and a controller for controlling the power converter, wherein, during a return to grid










 
 
  Recently Added Patents
Modified and stabilized GDF propeptides and uses thereof
Supply voltage generating circuit and semiconductor device having the same
Image forming apparatus, image forming method, and computer readable medium for identifying target-recording element using detection pattern
Interactive program guide systems and processes
Breathing mask
High-performance AHCI interface
Light emitting device and electronic device
  Randomly Featured Patents
Chirp and Doppler optical gauge
Method for stacking serially-connected integrated circuits and multi-chip device made from same
Rotary disk filter
Auto precharge control signal generating circuits for semiconductor memory devices and auto precharge control methods
Air conditioning device utilizing temperature differentiation of exhausted gas to even temperature of external heat exchanger
Hair conditioning shampoo
Computer-aided writing system and method with cross-language writing wizard
Scanning microscope
Smart cards, systems using smart cards and methods of operating said cards in systems
Closure assembly having continually adjustable lateral restraint