Patent application number | Description | Published |
20100194318 | Power Supply System Provided With a Plurality of Power Supplies, and Vehicle Provided With Such Power Supply System - A power supply system is provided with a plurality of driving motors, a power converter, and a plurality of power supplies which supply the driving motors with power and have different output voltages. Each power supply is connected with at least one driving motor through the power converter and with at least one driving motor through a path which does not include the power converter. | 08-05-2010 |
20100209791 | FUEL CELL SYSTEM - Provided is a fuel cell system which can perform sufficient scavenging during a current system operation even if required sufficient scavenging during the previous system stop is not performed. When a control device detects that a system start command is input and a low temperature mode flag is turned “ON”, the control device compares a measured impedance during the previous system stop stored in a measured impedance memory to a low temperature start target impedance It stored in a reference impedance memory, to judge whether or not a scavenging process performed during the previous system stop has been insufficient. When the control device judges that the scavenging process is insufficient, an immediate warm-up operation is executed during the current system operation to immediately raise the temperature. | 08-19-2010 |
20100239929 | FUEL CELL SYSTEM - A fuel cell system has a fuel cell stack generating electricity with a reactive gas supplied thereto and a controller supplying to the fuel cell stack the reactive gas whose pressure is higher than a normal operational pressure on condition that a temperature of the fuel cell stack is equal to or less than a predetermined threshold temperature and that a moisture content of the fuel cell stack is equal to or less than a predetermined threshold value. Where a supply pressure of the reactive gas is raised, an amount of moisture taken away by the reactive gas becomes less, and thus, water balance within the fuel cell stack shifts toward accumulation of moisture contained in the reactive gas into the film-electrode joined body. However, since the moisture content of the fuel cell stack is equal to or less than the predetermined threshold value, the system can improve the starting performance of the fuel cell stack at low temperature while suppressing flooding. | 09-23-2010 |
20100255396 | FUEL CELL SYSTEM - A fuel cell system has a flooding elimination mode as one of available operation modes of fuel cells and includes a drive controller. When the ambient temperature of the fuel cell system is not higher than a preset first temperature, the drive controller causes the fuel cells to be driven in the flooding elimination mode. When the ambient temperature of the fuel cell system is not lower than a preset second temperature that is higher than the first temperature, the drive controller prohibits the fuel cells from being driven in the flooding elimination mode. On the occasion of input of a checkup instruction of the fuel cells, the drive controller causes the fuel cells to be driven in the flooding elimination mode, independently of the ambient temperature. This arrangement effectively improves the user's convenience at the checkup time of the fuel cell system having the operation mode for eliminating the state of flooding. | 10-07-2010 |
20100266911 | FUEL CELL SYSTEM - Even in a fuel cell system which performs scavenging processing after the power generation of a fuel cell is stopped, the operation time for when a battery is being operated can be increased. When determining that the condition of running out of gas occurs based on a sensor value of a pressure sensor, a control unit stops the power generation of the fuel cell. The control unit, for example, shortens the time required for scavenging processing and then performs the scavenging processing. On the other hand, when determining that the condition of running out of gas does not occur and when the power generation of the fuel cell should be stopped, the control unit stops the power generation and then performs normal scavenging processing. | 10-21-2010 |
20100291446 | FUEL CELL SYSTEM - An object of the present invention is to reduce the period of time required to stop a fuel cell system and to suppress freezing of a fuel cell. The fuel cell system includes a controller that controls operations of a fuel cell, and the controller operates the fuel cell in a dry condition according to a state quantity (e.g., impedance) of the fuel cell in operation. The controller can operate the fuel cell in a dry condition before a system stop command is issued. In addition, the controller can switch an operation of the fuel cell from a dry condition to a wet condition when a required output of the fuel cell or a vehicle speed of a vehicle equals or exceeds a predetermined value. | 11-18-2010 |
20100323260 | FUEL CELL SYSTEM - A fuel cell system capable of adequately controlling the water content of a fuel cell is provided. An impedance reference value is stored in a memory for an impedance comparator. The impedance reference value is a reference value that is set in order to prevent the water content in a fuel cell from decreasing too much. The impedance comparator compares a measured impedance value supplied from an impedance operation unit with the impedance reference value and performs scavenging control based on the comparison result. | 12-23-2010 |
Patent application number | Description | Published |
20080239768 | DIRECT-CURRENT CONVERTER - A direct-current converter includes a high-frequency converting circuit converting voltage of a direct-current power source to alternating-current voltage, a transformer having primary and secondary windings P, S and a rectification smoothing circuit rectifying and smoothing voltage induced in the secondary winding. This converting circuit includes other transformer having first and second windings n | 10-02-2008 |
20080285311 | DC-DC CONVERTER - In a DC-DC converter of the present invention, a converting circuit converts a DC-DC voltage outputted from a DC power supply into an AC voltage, and to output to a series circuit in which a primary winding of a first transformer, a first reactor, and a current resonance capacitor are connected to one another in series. A primary winding of a second transformer, a primary winding of a third transformer, and a second reactor constitute a closed loop. A secondary winding of the second transformer and a secondary winding of the third transformer are connected in series to both ends of a secondary winding of the first transformer. A first rectifying/smoothing circuit rectifies and smoothes a voltage of the secondary winding of the second transformer. A second rectifying/smoothing circuit rectifies and smoothes a voltage of the secondary winding of the third transformer. | 11-20-2008 |
20100194199 | CURRENT BALANCING APPARATUS, CURRENT BALANCING METHOD, AND POWER SUPPLY APPARATUS - A current balancing apparatus includes a first transformer having a first primary winding and a first secondary winding electromagnetically coupled with the first primary winding, the first primary winding having a first end connected to a first load that passes a first current; a second transformer having a second primary winding and a second secondary winding electromagnetically coupled with the second primary winding, the second primary winding having a first end connected to a second load that passes a second current having an AC component substantially having a 180-degree phase difference with respect to the first current; and a series circuit including the first secondary winding, the second secondary winding, and a current smoother, to balance the first current and second current with each other. | 08-05-2010 |
20100214210 | CURRENT BALANCING DEVICE, LED LIGHTING APPARATUS, LCD BACKLIGHT MODULE, AND LCD DISPLAY UNIT - The present invention includes: a power supply unit | 08-26-2010 |
20100237802 | CURRENT BALANCING DEVICE, LED LIGHTING DEVICE, AND LCD B/L MODULE - A current balancing device includes: a power supply that outputs sinusoidal alternating-current; and a plurality of series circuits, each of the series circuits including a full-wave rectifier, one or more of windings, and one or more of loads in series connection, the full-wave rectifier connected to an output of the power supply and performing full-wave rectification for the alternating-current of the power supply. Currents flowing in the respective series circuits are balanced based on an electromagnetic force generated in one or more of the windings. | 09-23-2010 |
20100295471 | CURRENT BALANCING APPARATUS - A current balancing apparatus includes a power supply unit | 11-25-2010 |
20130016531 | POWER SUPPLY DEVICE AND METHOD OF CONTROLLING POWER SUPPLY DEVICEAANM ASO; ShinjiAACI Niiza-shiAACO JPAAGP ASO; Shinji Niiza-shi JP - The present invention includes: a power factor correction circuit configured to correct a power factor; a DC/DC converter configured to convert an output voltage of the power factor correction circuit to a different direct-current voltage; an input voltage detector configured to detect an input voltage inputted into the power factor correction circuit; and a power factor correction circuit output voltage controller configured to generate a voltage instruction for controlling the output voltage of the power factor correction circuit, based on a value of the detected input voltage, an output current value to a load connected to an output of the DC/DC converter or an output power value of the load, as well as a set value of an input voltage short break output hold time, and to output the voltage instruction to the power factor correction circuit. | 01-17-2013 |
20130106468 | GATE DRIVER | 05-02-2013 |
Patent application number | Description | Published |
20090201700 | DC CONVERSION APPARATUS - A DC conversion apparatus comprises a first transformer, a second transformer, a parallel circuit having series circuits connected in parallel, one of the series circuits including a reactor and a primary winding of the first transformer, the other series circuit including a reactor and a primary winding of the second transformer, a conversion circuit converting a DC voltage of a DC power source into an AC voltage and outputting it to the parallel circuit, a first rectifying-smoothing circuit rectifying and smoothing a first voltage generated by a first secondary windings of the first transformer into a first DC output, and a second rectifying-smoothing circuit rectifying and smoothing a second voltage generated by a first secondary windings of the second transformer into a second DC output that is different from the first voltage. The second secondary windings of the first transformer are connected in parallel with the first secondary windings of the second transformer. | 08-13-2009 |
20100232184 | DC CONVERTER - A DC converter includes: a transformer (T | 09-16-2010 |
20110248638 | LED DRIVING APPARATUS - An LED driving apparatus comprises a power supply unit that includes a transformer having a primary coil and a plurality of secondary coils and outputs alternating power from the plurality of secondary coils; a current balancing unit and a first rectification smoothing unit connected to a first secondary coil of the plurality of secondary coils; an LED load group that includes a plurality of LEDs connected in series and to which power smoothed from the first rectification smoothing unit is supplied; a power control unit that controls power to be supplied to the first and second LED loads, based on currents flowing in the first and second LED loads; and a direct current load that is connected to both ends of a second secondary coil of the plurality of secondary coils. The power supplying unit controls the alternating power, based on the power supplied to the direct current load. | 10-13-2011 |
20130016534 | RESONANT CONVERTERAANM ISHIKURA; KeitaAACI SaitamaAACO JPAAGP ISHIKURA; Keita Saitama JPAANM ASO; ShinjiAACI SaitamaAACO JPAAGP ASO; Shinji Saitama JP - A resonant converter includes: a first switching element and a second switching element, which are connected in series; a series resonant circuit, which includes a primary coil of a transformer having leakage inductance and a current resonant capacitor, and which is connected in parallel to one of the first switching element and the second switching element; a rectifying-and-smoothing circuit, which is connected to a secondary coil of the transformer, wherein an output voltage is to be supplied to a load; and a clamp circuit, which clamps a voltage between both ends of the current resonant capacitor to a predetermined voltage value, wherein, when an output current supplied from the rectifying-and-smoothing circuit to the load is higher than the predetermined current value, an output characteristic is set so that, as the output current is increased, the output voltage is decreased. | 01-17-2013 |