Patent application number | Description | Published |
20080284376 | ENERGY STORAGE TYPE FEEDER VOLTAGE COMPENSATION APPARATUS AND METHOD OF CONTROLLING FEEDER VOLTAGE - An energy saving type feeder voltage compensation apparatus improved in availability at low temperatures, wherein when a electric energy storage apparatus is lower in temperature than a predetermined value, an output voltage output to a feeder side is made equal to or higher than a no-load output voltage of a substation connected in parallel. Power is supplied to a power running rolling stock preferentially from the electric energy storage apparatus. The heating value of the secondary battery is increased and the battery temperature is raised by this discharging, whereby internal resistance of the electric energy storage apparatus is lowered, and the charging and discharging loss is suppressed, and the efficiency and availability of the energy saving type feeder voltage compensation apparatus as a whole are improved. | 11-20-2008 |
20090242294 | ELECTRIC DRIVE VEHICLE - An electric drive vehicle having a power generator coupled to an engine, a first power converter connected with the power generator for converting the AC power generated by the power generator to DC power, a second power converter connected with the first power converter, for converting the DC power to AC power, a power consuming device for consuming the DC power, connected to a DC circuit between the first and second power converters, an electric motor connected with the second power converter, and wheels driven by the electric motor, wherein the vehicle has a first control mode for controlling the output of the electric motor and a second control mode for controlling the power consumed by the power consuming device, and the second control mode performs such control that the operations of the second power converter and the electric motor in the first control mode are simulated. | 10-01-2009 |
20100321847 | SEMICONDUCTOR POWER CONVERSION APPARATUS - A semiconductor power conversion apparatus capable of protecting an IGBT from an overvoltage by supplying a sufficient gate current to the gate of the IGBT. The IGBT is protected from the overvoltage by connecting clamping elements connected in series between a collector of the IGBT and the gate thereof, and by connecting a resistor to each of different junction points between the clamping elements connected in series. | 12-23-2010 |
20110297486 | FORKLIFT | 12-08-2011 |
20110313608 | CONSTRUCTION MACHINE AND INDUSTRIAL VEHICLE HAVING POWER SUPPLY SYSTEM - A construction machine or industrial vehicle having a power supply system which includes a chargeable and dischargeable capacitor and a feeder circuit connecting a battery and the capacitor to a load capable of power running and regeneration. The capacitor is connected through a DC/DC converter which includes a controller that controls energy charged or discharged by the capacitor through the DC/DC converter to the load. The controller includes a power running/regeneration operation estimater which estimates an operation pattern including a point of change between power running and regeneration modes of the motor, or DC current supplied to an inverter, or control lever information and previously stored operation pattern information, and a capacitor target voltage calculator which controls an output command value of the DC/DC converter according to the estimated operation pattern so that a capacitor target voltage sequentially decreases in power running and sequentially increases in regeneration. | 12-22-2011 |
20120277944 | DRIVE CONTROL DEVICE FOR WORKING VEHICLE - Provided is a drive control device for a working vehicle, this device controlling motive power to be virtually invariant, even during switching of traveling drive devices, and having high-efficiency characteristics. | 11-01-2012 |
20130304292 | CONSTRUCTION VEHICLE CONTROL APPARATUS AND CONSTRUCTION VEHICLE - A construction vehicle control apparatus is provided including: a motor generator control unit ( | 11-14-2013 |
20130317684 | WHEEL LOADER - A hybrid wheel loader is provided, the hybrid wheel loader achieving high work efficiency even with a short supply of power to be output relative to a vehicle power requirement. | 11-28-2013 |
20140163804 | WORK VEHICLE - There are provided an electric storage device ( | 06-12-2014 |
20140188320 | WORK VEHICLE - When the total value of demanded hydraulic power and demanded traveling power is larger than the sum of the engine power that can be output by an engine ( | 07-03-2014 |