Patents by Inventor Kiichi Inaba
Kiichi Inaba has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20170013709Abstract: A printed circuit board according to an embodiment of the present invention is formed of an insulating material and configured to mount components and wiring thereon. The printed circuit board includes a liquid pool for storing a liquid; a pair of deterioration detection traces one of which is connected to a power supply at one end and disposed in the liquid pool at the other end, and the other of which is connected to a ground at one end through a resistor and disposed in the liquid pool at the other end; a voltage detection circuit for detecting a voltage between the one ends of the one and the other deterioration detection traces; and a deterioration determination circuit for determining, based on the detected voltage, whether or not insulation deteriorates between the other ends of the one and the other deterioration detection traces.Type: ApplicationFiled: June 22, 2016Publication date: January 12, 2017Applicant: FANUC CORPORATIONInventors: Yasuyuki Matsumoto, Kiichi Inaba
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Patent number: 9526173Abstract: An attachment capable of preventing liquid from adhering to a specific electronic component within an electronic device. An electronic substrate has an attachment which can be attached to and detached from the electronic substrate. The attachment has an attachment part detachably attached to an edge of the electronic substrate; and a shield part connected to or integrally formed with the attachment part. The attachment part is a clip-like member having a certain degree of elasticity, and is configured to grip an edge of the electronic substrate so that the attachment is held at a predetermined place. The shield part has an inclined surface, and is configured to shield the electronic component so that liquid, such as a splash or droplet moving toward the electronic component, does not adhere to the component when the attachment is held at the predetermined place.Type: GrantFiled: July 31, 2013Date of Patent: December 20, 2016Assignee: FANUC CorporationInventors: Norihiro Chou, Kiichi Inaba
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Publication number: 20160356698Abstract: A corrosion detection circuit according to an embodiment of the present invention includes an insulating board; a test chip having a corrodible metal, mounted on the surface of the insulating board; a plurality of resistors each having a higher resistance value than the test chip after a change due to an environment including contact with the test chip and the adhesion of dust to the test chip; and a voltage detection circuit for detecting the output voltage of a divided voltage output point, when a voltage is applied to the test chip and a voltage dividing circuit using the plurality of resistors. The voltage detection circuit detects a break in the test chip by corrosion based on a variation in the output voltage.Type: ApplicationFiled: May 13, 2016Publication date: December 8, 2016Applicant: FANUC CORPORATIONInventors: Norihiro Chou, Kiichi Inaba
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Patent number: 9155231Abstract: A compact motor-drive unit wherein each component can be stably fixed to the unit. A motor-drive unit has a plurality of substrates each having a circuit for driving a motor; semiconductor devices mounted on the respective substrates; at least one smoothing capacitor mounted on at least one of the substrates; and a heat radiator having a heat-transferring surface adjacent to the semiconductors. The smoothing capacitor is positioned within a swept area formed by moving the first substrate arranged generally parallel to a base surface, in a counter-front direction, so that the smoothing capacitor is separated from the first substrate.Type: GrantFiled: January 14, 2014Date of Patent: October 6, 2015Assignee: Fanuc CorporationInventors: Naoki Masuda, Kiichi Inaba
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Patent number: 8878388Abstract: A motor control device has a current value sampling unit configured to sample a current value of a motor, a PWM signal generation unit configured to generate a PWM signal to drive the motor, based on the sampled current value of the motor, and a power supply stop unit configured to stop supply of power from a control power supply to a peripheral depending on power stored in a DC link part and power to which the control power source can supply when an alternating-current power source fails.Type: GrantFiled: June 24, 2013Date of Patent: November 4, 2014Assignee: FANUC CorporationInventors: Naoki Masuda, Kiichi Inaba
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Patent number: 8823306Abstract: A PWM signal generation unit generates a PWM signal to drive a motor, based on a current value of the motor sampled by a current value sampling unit, a position or speed of the motor sampled by a motor sampling unit, and a position or speed of a driven object sampled by a driven object sampling unit. An operation stop unit stops the operation of any one of the motor sampling unit and the driven object sampling unit depending on the power stored in the DC link part and power to which the control power source can supply when the alternating-current power source fails.Type: GrantFiled: June 13, 2013Date of Patent: September 2, 2014Assignee: Fanuc CorporationInventors: Naoki Masuda, Kiichi Inaba
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Publication number: 20140198455Abstract: A compact motor-drive unit wherein each component can be stably fixed to the unit. A motor-drive unit has a plurality of substrates each having a circuit for driving a motor; semiconductor devices mounted on the respective substrates; at least one smoothing capacitor mounted on at least one of the substrates; and a heat radiator having a heat-transferring surface adjacent to the semiconductors. The smoothing capacitor is positioned within a swept area formed by moving the first substrate arranged generally parallel to a base surface, in a counter-front direction, so that the smoothing capacitor is separated from the first substrate.Type: ApplicationFiled: January 14, 2014Publication date: July 17, 2014Applicant: FANUC CORPORATIONInventors: Naoki Masuda, Kiichi Inaba
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Publication number: 20140043778Abstract: An attachment capable of preventing liquid from adhering to a specific electronic component within an electronic device. An electronic substrate has an attachment which can be attached to and detached from the electronic substrate. The attachment has an attachment part detachably attached to an edge of the electronic substrate; and a shield part connected to or integrally formed with the attachment part. The attachment part is a clip-like member having a certain degree of elasticity, and is configured to grip an edge of the electronic substrate so that the attachment is held at a predetermined place. The shield part has an inclined surface, and is configured to shield the electronic component so that liquid, such as a splash or droplet moving toward the electronic component, does not adhere to the component when the attachment is held at the predetermined place.Type: ApplicationFiled: July 31, 2013Publication date: February 13, 2014Applicant: FANUC CorporationInventors: Norihiro CHOU, Kiichi INABA
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Publication number: 20130342013Abstract: A motor control device has a current value sampling unit configured to sample a current value of a motor, a PWM signal generation unit configured to generate a PWM signal to drive the motor, based on the sampled current value of the motor, and a power supply stop unit configured to stop supply of power from a control power supply to a peripheral depending on power stored in a DC link part and power to which the control power source can supply when an alternating-current power source fails.Type: ApplicationFiled: June 24, 2013Publication date: December 26, 2013Inventors: Naoki MASUDA, Kiichi INABA
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Publication number: 20130342149Abstract: A PWM signal generation unit generates a PWM signal to drive a motor, based on a current value of the motor sampled by a current value sampling unit, a position or speed of the motor sampled by a motor sampling unit, and a position or speed of a driven object sampled by a driven object sampling unit. An operation stop unit stops the operation of any one of the motor sampling unit and the driven object sampling unit depending on the power stored in the DC link part and power to which the control power source can supply when the alternating-current power source fails.Type: ApplicationFiled: June 13, 2013Publication date: December 26, 2013Inventors: Naoki MASUDA, Kiichi INABA
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Patent number: 8575884Abstract: A motor drive control system connected to an alternating current/direct current conversion circuit which converts alternating-current voltage or alternating current to direct-current voltage or direct current are provided. A control circuit controls supply or stop of the supply of the direct-current voltage or direct current from the alternating current/direct current conversion circuit to the first number of first direct current/alternating current conversion circuits and the second number of second direct current/alternating current conversion circuits while maintaining the total of the outputs of the first number of motors and the outputs of the second number of motors at a certain power not more than power which can be supplied from the alternating current/direct current conversion circuit.Type: GrantFiled: April 3, 2012Date of Patent: November 5, 2013Assignee: FANUC CorporationInventors: Naoki Masuda, Kiichi Inaba
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Publication number: 20120256567Abstract: A motor drive control system connected to an alternating current/direct current conversion circuit which converts alternating-current voltage or alternating current to direct-current voltage or direct current are provided. A control circuit controls supply or stop of the supply of the direct-current voltage or direct current from the alternating current/direct current conversion circuit to the first number of first direct current/alternating current conversion circuits and the second number of second direct current/alternating current conversion circuits while maintaining the total of the outputs of the first number of motors and the outputs of the second number of motors at a certain power not more than power which can be supplied from the alternating current/direct current conversion circuit.Type: ApplicationFiled: April 3, 2012Publication date: October 11, 2012Applicant: Fanuc CorporationInventors: Naoki MASUDA, Kiichi Inaba
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Publication number: 20050185387Abstract: A printed circuit board structure for a motor driving device in which the number of kinds of printed circuit boards for constituting inverter devices having different allowable input voltages are reduced. This printed circuit board structure comprises a plurality of conductive patterns and a selective connector. Each of the conductive patterns includes at least one pair of electrodes arranged in confronting relation to form a capacitor, and terminals electrically conducted with the electrodes. The selective connector selectively connects the terminals of the conductive patterns so that a capacitor circuit having predetermined capacitance is formed.Type: ApplicationFiled: February 24, 2005Publication date: August 25, 2005Applicant: FANUC LTDInventors: Naoyuki Suzuki, Kiichi Inaba
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Patent number: 6914790Abstract: A motor driving controller that drivingly controls motors for individual axes of an object of control comprises an AC/DC converter circuit for converting AC power into DC power and motor driving DC/AC converter circuits for converting DC power into AC power of optional frequency, for each motor. The controller further comprises an interface through which DC power from the AC/DC converter circuit is delivered to the outside. If motors for peripheral axes are added, motor driving DC/AC conversion devices are added and connected to the interface, whereby DC power is supplied.Type: GrantFiled: May 22, 2003Date of Patent: July 5, 2005Assignee: Fanuc LTDInventors: Shunsuke Matsubara, Naoyuki Suzuki, Kiichi Inaba
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Publication number: 20030235060Abstract: A motor driving controller that drivingly controls motors for individual axes of an object of control comprises an AC/DC converter circuit for converting AC power into DC power and motor driving DC/AC converter circuits for converting DC power into AC power of optional frequency, for each motor. The controller further comprises an interface through which DC power from the AC/DC converter circuit is delivered to the outside. If motors for peripheral axes are added, motor driving DC/AC conversion devices are added and connected to the interface, whereby DC power is supplied.Type: ApplicationFiled: May 22, 2003Publication date: December 25, 2003Applicant: Fanuc Ltd.Inventors: Shunsuke Matsubara, Naoyuki Suzuki, Kiichi Inaba
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Patent number: 6292363Abstract: A semiconductor module is mounted on a printed circuit board so that a heat radiating surface of the module and surfaces of the printed circuit boards are parallel to inner wall surfaces of a unit case. The total thickness of the semiconductor module constituting an inverter essential to a servo amplifier, and the printed circuit boards on which the semiconductor module is mounted is made substantially equal to a distance between the inner walls of the unit case so that the width of the servo amplifier can be minimized. The other components having sizes smaller than the width of the unit case are selected, and an electrolytic capacitor and the like are divided into a plurality of parts so that the divided parts are separately accommodated.Type: GrantFiled: April 16, 1999Date of Patent: September 18, 2001Assignee: Fanuc Ltd.Inventors: Tatsuo Shinohara, Hideyuki Nakamura, Naoyuki Suzuki, Kiichi Inaba, Makoto Takeshita