Patent application number | Description | Published |
20090134365 | THERMOELECTRIC MATERIAL - A p-type oxide thermoelectric material which has a high output factor and a low environmental load. The thermoelectric material is composed of an oxide represented by the compositional formula (Ni | 05-28-2009 |
20100101622 | THERMOELECTRIC CONVERSION MODULE AND METHOD FOR MANUFACTURING THERMOELECTRIC CONVERSION MODULE - A thermoelectric conversion module includes a laminated body including a plurality of thermoelectric components laminated therein. Each of the thermoelectric components includes an insulating layer, and a thermoelectric conversion element section in which a plurality of p-type thermoelectric conversion material layers and a plurality of n-type thermoelectric conversion material layers are arranged on the insulating layer in a series connection. A step eliminating insulating material layer is arranged to eliminate a step between the thermoelectric conversion element section and a vicinity thereof, in a region between the insulating layers adjacent to each other in a laminating direction, around the p-type thermoelectric conversion material layers and n-type thermoelectric conversion material layers constituting the thermoelectric conversion element section. The thermoelectric conversion element section has a serpentine shape. Thicknesses of the p-type and n-type thermoelectric conversion material layers constituting the thermoelectric conversion element section are greater than the thickness of the insulating layer. | 04-29-2010 |
20100212713 | Thermoelectric Conversion Module Component, Thermoelectric Conversion Module, and Method for Producing the Aforementioned - A thermoelectric conversion module component includes a laminate formed of a plurality of stacked thermoelectric elements each including a unit circuit having repeated pn junction pairs that extend meanderingly and that are formed of p-type thermoelectric material layers and n-type thermoelectric material layers arranged so as to be alternately connected to each other on a surface of an insulating layer, and oblique joint surfaces at which electrodes are led out of the laminate. The oblique joint surfaces are such that a plurality of the thermoelectric conversion module components are electrically connected by contacting the surfaces with each other to form a ring. A thermoelectric conversion module includes a plurality of the thermoelectric conversion module components connected to each other to form a ring. | 08-26-2010 |
20110081741 | THERMOELECTRIC CONVERSION MODULE AND METHOD FOR MANUFACTURING THERMOELECTRIC CONVERSION MODULE - A thermoelectric conversion module includes a laminated body including a plurality of thermoelectric components laminated therein. Each of the thermoelectric components includes an insulating layer, and a thermoelectric conversion element section in which a plurality of p-type thermoelectric conversion material layers and a plurality of n-type thermoelectric conversion material layers are arranged on the insulating layer in a series connection. A step eliminating insulating material layer is arranged to eliminate a step between the thermoelectric conversion element section and a vicinity thereof, in a region between the insulating layers adjacent to each other in a laminating direction, around the p-type thermoelectric conversion material layers and n-type thermoelectric conversion material layers constituting the thermoelectric conversion element section. The thermoelectric conversion element section has a serpentine shape. Thicknesses of the p-type and n-type thermoelectric conversion material layers constituting the thermoelectric conversion element section are greater than the thickness of the insulating layer. | 04-07-2011 |
Patent application number | Description | Published |
20100270989 | Switching power supply - A switching power supply that can suppress output variation at a time of transition of a control mode from a non-linear control mode to a linear control mode. The switching power supply includes instruction value forming circuitry that forms, in a linear control mode, a linear control instruction value for linearly control a switching circuit based on an error of an output voltage, and forms, in a non-linear control mode, a non-linear control instruction value for non-linearly control the switching circuit. The instruction value forming circuitry predicts, in the non-linear control mode, a linear control instruction value suited to the load current in the non-linear control mode, and uses the predicted linear control instruction value for an initial value of the linear control instruction value at a time of transition from the non-linear control mode to the linear control mode. | 10-28-2010 |
20110068965 | DIGITAL CONTROL SWITCHING POWER SUPPLY UNIT - A digital control switching power supply unit converts an input voltage into a desired output voltage using a digitally controlled pulse width modulation (PWM) signal according to a switching cycle. The power supply unit includes an analog-to-digital converter (ADC). The ADC converts a result of a comparison between an output voltage and a reference voltage to a digital signal during a conversion cycle. The ADC includes a circuit for outputting a phase difference between a switching cycle and the conversion cycle, and a delay circuit. The delay circuit generates a delay output current based on a result of the comparison and the phase difference and determines the conversion time delay according to the delay output current. The delay circuit also generates a delay reference current based on the reference voltage and the phase difference and determining the duration of the conversion cycle according to the delay reference current. | 03-24-2011 |
20110133712 | DIGITAL CONTROL SWITCHING POWER SUPPLY UNIT - A digital control switching power supply unit includes an A/D converter circuit having a delay line circuit that has a delay element array whose delay time is controlled by a bias current, and that converts a current value into a digital signal using a signal transmission delay time, a phase difference detector circuit that detects a phase difference between a switching cycle and an A/D conversion cycle, a charge pump circuit that generates a control voltage in accordance with the phase difference, and a bias current indicator circuit that determines a bias current in accordance with an output voltage of the charge pump circuit and a result of a comparison of a detected value of the output voltage and a reference voltage, wherein the digital control switching power supply unit controls in such a way that the A/D conversion cycle is synchronized with the switching cycle. | 06-09-2011 |
20110215781 | DIGITAL CONTROL SWITCHING REGULATOR HAVING AN INPUT VOLTAGE DETECTION CIRCUIT - A digital control switching regulator of the invention ON/OFF-controls switching elements by digital-controlled pulse width modulation signals and converts an input voltage to a desired output voltage. The switching regulator includes an input voltage detection circuit that includes: a voltage dividing circuit outputting a divided voltage of the input voltage; a comparator section comparing the divided voltage of the input voltage with a first reference voltage and a second reference voltage and outputting a first comparison signal and a second comparison signal indicating comparison results; and a control section controlling a dividing ratio of the voltage dividing circuit based on the first comparison signal and the second comparison signal to obtain the predetermined divided voltage, thereby outputting an input voltage digital signal corresponding to the input voltage. The input voltage digital signal controls controller coefficients for use in the digital control. | 09-08-2011 |
20110279101 | SWITCHING POWER SUPPLY SYSTEM PROVIDED WITH UNDER VOLTAGE LOCK OUT CIRCUIT - A switching power supply system controlling switching operations of switching devices by a control circuit to convert an input voltage into a desired output voltage, the system being provided with a under voltage lock out circuit including: an input voltage detection unit detecting an input voltage and producing an input voltage digital signal corresponding to the input voltage Vin; and a voltage level comparison unit carrying out digital comparison of the input voltage digital signal with each of two voltage detection level data and outputting the results of the comparisons as an output signal, in which by changing voltage detection level data stored in two registers, desired voltage detection levels and hysteresis characteristic are easily actualized. | 11-17-2011 |
Patent application number | Description | Published |
20090079435 | Load Drive Circuit - According to the present invention, the operation of a diagnostic circuit within a load drive circuit, which has been built into an electronic control device, is checked without modifying the electronic control device or the like. The load drive circuit, which drives a load such as a solenoid using a DC power supply as a power supply, includes a drive circuit and a diagnostic circuit which is independently provided within the drive circuit. Upon input of a drive-stop signal from a control circuit that controls the drive circuit, the operation of at least the drive circuit stops, so that whether the diagnostic circuit, which diagnoses the condition of the load, is normally operating or not is checked in a condition in which the load drive circuit has been built into the electronic control device. | 03-26-2009 |
20090107469 | CONTROL UNIT FOR INTERNAL COMBUSTION ENGINE - There is proposed a control unit for an internal combustion engine, which comprises a boost circuit, a switching element, a current detecting resistor and a controller and is designed to be actuated such that the boost circuit is used to boost a power source voltage to create a boosted voltage and the controller is used to control the switching element so as to enable the boosted voltage to flow to the injector solenoid coil. This control unit is designed such that, when the boost circuit goes out of order, the injector solenoid coil is excited by making use of the power source voltage without using the boosted voltage and without creating a peak current to thereby generate a first holding current required for opening the injector and a second holding current required for retaining the opened state of the injector, the second holding current being lower in intensity than the first holding current. | 04-30-2009 |
20090119913 | Electronic Circuit Device and Production Method of the Same - An electronic circuit device comprises: a printed circuit board mounted with electronic components; a resin-molded portion formed of resin so disposed that the electronic components are covered therewith; a convex connector that has metal terminals for connection and is exposed from the resin-molded portion; and a sealing member wrapped around the resin-molded portion. | 05-14-2009 |
20090177367 | FUEL INJECTION CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - Disclosed herein is a fuel injection control apparatus for an internal combustion engine, capable of opening and closing accurately a valve of the fuel injector even when the quantity of injection required is small and a pulse duration of a driving pulse signal to the fuel injector is short. | 07-09-2009 |
20090243574 | INTERNAL COMBUSTION ENGINE CONTROLLER - An internal combustion engine controller comprises a booster coil connected to a battery and a booster capacitor. A switch element is connected to the booster coil to control the passage of current through the booster coil and an interruption of the current. The booster capacitor accumulates electrical energy generated with an inductance of the booster coil at the time of the interruption of the passage of the current. A booster control circuit carries out control in a constant boost switching cycle so as to pass the current through the booster coil and the switch element until the current reaches a preset switching stop threshold value and then interrupt the current to charge the energy generated with the inductance of the booster coil into the booster capacitor. The booster control circuit is configured to ensure a minimum time period for the booster capacitor-charging of the energy within the boost switching cycle. | 10-01-2009 |
Patent application number | Description | Published |
20090127915 | Composition for Polyurethane Foam, Polyurethane Foam Obtained From the Composition, and Use Thereof - The polyurethane foam composition of the present invention comprises at least water, a catalyst, a surfactant, a polyisocyanate, and a polyol and/or a polymer-dispersed polyol in which polymer fine particles obtained by polymerizing a compound having an unsaturated bond are dispersed in a polyol, wherein the polyol comprises at least (A) a plant-derived polyol produced by using a raw material obtained from plants and (B) a low-monol polyol having an overall degree of unsaturation of 0.050 meq/g or less. The polyurethane foam relating to the present invention is obtained by foaming this polyurethane foam composition. The polyurethane foam contributes to reducing environmental burdens and attains hardness and ball rebound suitable for a cushioning material and excellent durability in a balanced manner. | 05-21-2009 |
20090143495 | Composition for Polyurethane Foam, Polyurethane Foam Obtained From the Composition, and Use Thereof - The polyurethane foam composition of the present invention comprises a polyol, a catalyst, a surfactant, a foaming agent and a polyisocyanate, wherein the polyol contains, at least, (A) a polyol that is produced by using a raw material obtained from plant-derived oil, contains more than three side chains per molecule, each side chain comprising a hydrocarbon chain having 4 or more carbon atoms, and has an average number of functional groups of 1.5 to 4.5 and a hydroxyl value of 80 to 140 mgKOH/g. The polyurethane foam of the present invention is produced by foaming the above polyurethane foam composition. The polyurethane foam contributes to reducing environmental burdens, and has excellent low rebound property, particularly a characteristic that the increase in hardness at low temperatures is suppressed. | 06-04-2009 |