Kikunaga
Atsushi Kikunaga, Toyota-Shi JP
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20130026955 | ELECTRIC MOTOR CONTROL DEVICE - First and second inverters are each controlled based on pulse width modulation using a carrier signal. In order to decrease the noise caused by the first inverter and the second inverter, a frequency of a carrier signal of the first inverter and a frequency of a carrier signal of the second inverter are controlled. The frequency of the carrier signal of the first inverter is changed periodically or randomly within a first preset frequency range as time elapses. The frequency of the carrier signal of the second inverter is changed periodically or randomly within a second preset frequency range to avoid overlapping the first frequency range. | 01-31-2013 |
Daiki Kikunaga, Tokyo JP
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20150262153 | TRANSPORTATION EXPENSE APPLYING SERVER, TRANSPORTATION EXPENSE APPLYING SYSTEM, TRANSPORTATION EXPENSE APPLYING METHOD, AND COMPUTER-READABLE RECORDING MEDIUM - Disclosed is a transportation expense applying system which makes it possible to efficiently apply for payment of transportation expenses incurred during traveling between business offices without cooperating with any apparatus installed in means of transportation. | 09-17-2015 |
Ichitaro Kikunaga, Sodegaura-Shi JP
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20160068664 | SILICA SOL AND SILICA-CONTAINING EPOXY RESIN COMPOSITION - The silica sol of the invention contains silica particles having a mean primary particle size of 20 to 100 nm and which has a silica particle size/mean primary particle size ratio, determined through dynamic light scattering, of 3.0 or less, wherein the silica particles are surface-treated with an organic silane compound and have an α-ray emission rate of 0.005 counts/cm | 03-10-2016 |
20160130152 | SILICA SOL AND METHOD FOR PRODUCING SILICA SOL - A silica sol which has excellent moisture absorption resistance and stability as well as high purity and which does not cause coloring of a solvent or a resin to which the silica sol has been applied. The silica sol contains high-purity silica particles, water and/or a liquid organic medium serving as a dispersion medium, and an organic base compound, the silica particles being dispersed in the dispersion medium, wherein the silica particles satisfy the following requirements (a) to (c): (a) the silica particles have a specific surface area, as determined through a nitrogen absorption method, of 20 to 500 m | 05-12-2016 |
Ichitaro Kikunaga, Sodegaura JP
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20160130425 | SILICA-CONTAINING RESIN COMPOSITION AND METHOD FOR PRODUCING SAME, AND MOLDED ARTICLE PRODUCED FROM SILICA-CONTAINING RESIN COMPOSITION - A silica-containing resin composition, characterized by containing a resin and silica particles in an amount of 5 to 300 parts by mass, with respect to 100 parts by mass of the resin, wherein the silica particles satisfy the following requirements (a) to (c): (a) the silica particles have a specific surface area, as determined through a nitrogen absorption method, of 20 to 500 m | 05-12-2016 |
Kazuya Kikunaga, Saga JP
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20140091806 | STATIC-ELECTRICITY-QUANTITY MEASURING APPARATUS AND STATIC-ELECTRICITY- QUANTITY MEASURING METHOD - A static-electricity-quantity measuring apparatus and a static-electricity-quantity measuring method are optimum for a manufacturing site under a difficult-to-measure situation and measure the quantity of static electricity of electronic parts, machine parts, etc. simply with high accuracy. A static-electricity-quantity measuring apparatus of the present invention has: a receiving unit which receives virtual electromagnetic waves generated by vibrations applied to a measured object; a measuring unit which measures at least one of the intensity, frequency, and phase of the virtual electromagnetic waves received by the receiving unit; and a calculating unit which calculates the quantity of static electricity of the measured object based on the measurement result of the measuring unit. | 04-03-2014 |
Kazuya Kikunaga, Tosu-Shi JP
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20130307552 | STATIC-ELECTRICITY ELECTRIFICATION MEASUREMENT METHOD AND APPARATUS - [Problem to be Solved] A static-electricity electrification measurement method and apparatus that satisfy, at the same time, three conditions: (1) to measure static-electricity electrification non-destructively, (2) to reduce environmental influence of a measured object wherein metals and insulators are mixed to measure the static-electricity electrification, and (3) to measure the static-electricity electrification without getting close thereto is provided. | 11-21-2013 |
Toshiyuki Kikunaga, Tokyo JP
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20080252145 | DC/DC POWER CONVERSION DEVICE - A DC/DC power conversion device includes n-stage circuits comprised of an inverter circuit for driving which is connected between positive terminals and negative terminals of smoothing capacitors, and a rectifier circuit which is connected between positive terminals and negative terminals of smoothing capacitors; a first circuit corresponding to at least one among the n-stage circuits and configured by connecting in parallel cell circuits of m, second circuits corresponding to a plurality of remaining circuits of (n−1) among the n-stage circuits; capacitors for energy transfer connected between middle points of the cell circuits and middle points of the second circuits; and column circuits of m comprised of the cell circuits, the second circuits and the capacitors for energy transfer, wherein the middle points are contact points of high voltage sided elements and low voltage sided elements of the cell circuits and the second circuits; and driving signals for driving the respective column circuits have the same driving cycle and are out of phase with each other. | 10-16-2008 |
20090261793 | DC/DC POWER CONVERTING APPARATUS - Three or more circuits, in which series-connected low-voltage and high-voltage side switches including MOSFETs including parasitic diodes are connected across positive and negative terminals of each of smoothing capacitors, are connected in series. One of elementary series circuits, each including a capacitor and an inductor, is disposed between any adjacent two of the circuits with the elementary series circuits set to have the same period of resonance. The MOSFETs of rectifier circuits are brought into an ON state simultaneously with the MOSFETs of a driving inverter circuit and brought into an OFF state earlier than the MOSFETs of the driving inverter circuit by a period of time not exceeding a time period equal to (period of resonance)/2. A resonance phenomenon of the capacitor and the inductor is used and conduction loss in the rectifier circuits is reduced in DC/DC power conversion performed through charging and discharging operation of the capacitor. | 10-22-2009 |
20100019753 | DC/DC POWER CONVERTING APPARATUS - Three or more circuits including a driving inverter circuit and rectifier circuits are connected in series, each of the circuits including a high-voltage side MOSFET and a low-voltage side MOSFET connected in series as well as a smoothing capacitor having positive and negative terminals between which the MOSFETs are connected. LC series circuits, each including a capacitor and an inductor, are disposed individually between one specific circuit and the other circuits with periods of resonance of the LC series circuits made equal to one another. In performing DC/DC power conversion through charging and discharging operation of the capacitors, a resonance phenomenon of the LC series circuits is used to improve conversion efficiency and achieve a reduction in size of the apparatus structure. | 01-28-2010 |