Patent application number | Description | Published |
20090091191 | ELECTRIC POWER SUPPLY SYSTEM - There is provided an electric power supply system in which electric power is delivered from one electric power unit to load or the other electric power unit and can control and monitor the other electric power unit by one electric power unit. An electric source bus is built up by connecting an output line | 04-09-2009 |
20090099704 | DIGITAL CONTROLLER - There is provided a digital controller which can generate no oscillation even if sensing a load side and enables control of supplying a desired voltage to the load. In an power amplifier which supplies an output voltage v | 04-16-2009 |
20100114399 | DIGITAL CONTROLLER FOR CONTROLLING OUTPUT VOLTAGE UNDER LARGE VARIATIONS IN LOAD AND SUPPLY VOLTAGE - There is provided a digital controller which can reduce a variation in output voltage as compared to the conventional digital controller at the time of abrupt changes in load and in input of a power amplifier. The digital controller is built in the power amplifier for supplying an output voltage v | 05-06-2010 |
20110310637 | DC-DC CONVERTER - A controller controls a voltage-source power converter and a current-source power converter based on a detection value of a rail voltage input to the voltage-source power converter and a detection value of a charging voltage output from the current-source power converter, at the time of charging operation. | 12-22-2011 |
20130027984 | CURRENT-FED ISOLATION CONVERTER - A current-fed isolation converter includes a coil that is connected to a primary side of a transformer, a power source that supplies electric power to the primary side of the transformer, a switching element that controls a first electric current flowing in the coil, a snubber circuit that includes a rectifying element and a capacitive element that is charged by a second electric current flowing in the rectifying element, and a step-down power supply circuit that regenerates electric charge of the capacitive element to the power source. The snubber circuit controls an excess voltage that is generated when the switching element is turned off. The power supply circuit maintains a charging voltage of the capacitive element at a predetermined voltage value. | 01-31-2013 |
20130077351 | DC-DC CONVERTER AND METHOD FOR CONTROLLING DC-DC CONVERTER - A DC-DC converter is configured with a voltage-source power converter provided at a primary side of a transformer, a current-source power converter provided at a secondary side of the transformer, and a controller. The controller generates a first control input based on a voltage between input and output terminals of the voltage-source power converter, a second control input based on a voltage between input and output terminals of the current-source power converter, and a command value for PWM or PFM control based on the first and second control inputs and an input-output current flowing between one of the input and output terminals of the voltage-source power converter and the current-source power converter. Therefore, it is easy to switch between a powering state and a regenerating state in the DC-DC converter. | 03-28-2013 |
20130082628 | DC-DC CONVERTER - A DC-DC converter is configured with a voltage-source power converter at a primary side of a transformer, a current-source power converter at a secondary side of the transformer, and a controller. The DC-DC converter is connected between a storage battery and an inverter that drives an electric motor. The controller generates a first control input based on a voltage between input and output terminals of the voltage-source power converter, a second control input based on a voltage between input and output terminals of the current-source power converter, and a command value for PWM or PFM control based on the first and second control inputs and an input-output current flowing between one of the input and output terminals of the voltage-source power converter and the current-source power converter. Therefore, it is easy to switch between a powering state and a regenerating state. | 04-04-2013 |
20130121034 | DC-DC Converter - A DC-DC converter is configured with a voltage-source power converter at a primary side of a transformer, a current-source power converter at a secondary side of the transformer, and a controller. First and second voltage detection circuits respectively detect first and second voltages of the voltage-source and the current-source power converters. A current detection circuit detects an input-output current of the current-source power converter. The controller controls the voltage-source and the current-source power converters to transfer power between the primary side and the secondary side of the transformer. The controller includes a calculation unit that performs calculations based on the first voltage, the second voltage and the input-output current, and a table unit that include a plurality of parameter sets. The calculation unit performs the calculations based on one of the plurality of parameter sets that is selected from the table unit. | 05-16-2013 |
20130322128 | BIDIRECTIONAL DC-DC CONVERTER AND METHOD OF CONTROLLING BIDIRECTIONAL DC-DC CONVERTER - A bidirectional DC-DC converter is configured with a transformer that has a first winding and a second winding, a first DC-AC converter that is provided between a first DC voltage line and the first winding, a second DC-AC converter that is provided between a second DC voltage line and the second winding, and a controller that performs a switching control operation that bidirectionally transmits DC power between the first DC voltage line and the second DC voltage line. When the bidirectional DC-DC converter is in a light load operation state, the controller provides an operation stop period that periodically stops the switching control operation so as to perform an intermittent switching control operation. | 12-05-2013 |
Patent application number | Description | Published |
20090112040 | Method for Adiabatic Cooling Type Crystallization of Organic Compound and Apparatus Therefor - The present invention provides a method for adiabatic cooling type crystallization of organic compound and an apparatus therefore, by which running cost and facility cost can be reduced. | 04-30-2009 |
20100101928 | HYDROUS MATTER TREATMENT SYSTEM - The present invention is to provide means by which energy required for treating sewage sludge can be saved. The present invention provides a treatment system for a watery material that includes a dewatering tank in which liquefied matter of a material that is gaseous at a normal temperature and a normal pressure is contacted with the watery material and the watery material is separated into the resultant watery material and a liquid phase that contains an aqueous component from the watery material, an evaporator that vaporizes the material that is gaseous at a normal temperature and a normal pressure from the liquid phase, a separator that separates a gas of the material thus vaporized from effluent water, a condenser that condenses the gas into liquefied matter, a condenser that condenses the gas into liquefied matter, two or more external heat sources selected from the group consisting of atmosphere, sewage, warm effluent water, and ground water, an external heat temperature detector that detects temperatures of external heats of the external heat sources, and an external heat supply destination controlling unit that identifies external heat sources A and B on the basis of the temperatures of the external heats detected by the external heat temperature detector and controls the external heat from the external heat source A to be supplied to the evaporator and the external heat from the external heat source B to be supplied to the condenser. | 04-29-2010 |
20100108600 | METHOD FOR TREATMENT OF WATER-CONTAINING MATERIAL - A method and apparatus for treatment of a water-containing material. The method includes: (A) bringing a liquid of a substance in a gaseous state under normal temperature and pressure conditions into contact with a water-containing material; (B) obtaining a liquid layer through solid-liquid separation from a treated product resulting from (A); (C) vaporizing and extracting at least a portion of the substance that is in the gaseous state under normal temperature and pressure conditions as gas from the liquid layer obtained from (B); and (D) collecting a lower layer resulting from liquid-liquid separation conducting on a liquid layer resulting from (C). The method and apparatus achieve efficient treatment of a water-containing material and allow the material after the treatment to be recycled as a resource. | 05-06-2010 |
20100192625 | Method for Adiabatic Cooling Type Crystallization of Organic Compound and Apparatus Therefor - The present invention provides a method for adiabatic cooling type crystallization of organic compound and an apparatus therefore, by which running cost and facility cost can be reduced. | 08-05-2010 |