Patents by Inventor Koji Iwahashi
Koji Iwahashi 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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Patent number: 10135379Abstract: An LED indicator 4 connected to industrial machinery including an inverter 1, includes: an LED substrate 8 into which a display control signal according to a state relating to the industrial machinery is input; and a plurality of displays 31, 32, and 33 configured to display in a lighting state corresponding to a state of the industrial machinery, on the basis of the display control signal input by the LED substrate 8. The plurality of displays 31, 32, and 33 each include a partially circular-arc shape, and are generally arranged in an approximately annular shape. The plurality of displays 31, 32, and 33 include the two displays 31, 32 that generally configure a half ring at one side of the approximately annular shape, and the one display 33 that generally configures a half ring at the other side of the approximately annular shape.Type: GrantFiled: June 27, 2017Date of Patent: November 20, 2018Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Koji Iwahashi, Satoshi Sueshima, Tetsuo Yanagimoto, Yuto Kubo, Yuki Kawafuchi
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Publication number: 20180107170Abstract: An electric motor drive control system includes an electric motor drive control device, a manual command device connected to the electric motor drive control device, a radio that performs radio communication with a telecommunication device that is a radio connection destination, and processing circuitry that sets a radio communication mode in which the radio responds to a radio connection request from the telecommunication device to establish a radio connection, the radio communication mode being set when the manual command device issues no manual command.Type: ApplicationFiled: December 15, 2017Publication date: April 19, 2018Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Koji IWAHASHI, Satoshi SUESHIMA, Yasushi KIBE, Takeshi UEDA
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Publication number: 20170294861Abstract: An LED indicator 4 connected to industrial machinery including an inverter 1, includes: an LED substrate 8 into which a display control signal according to a state relating to the industrial machinery is input; and a plurality of displays 31, 32, and 33 configured to display in a lighting state corresponding to a state of the industrial machinery, on the basis of the display control signal input by the LED substrate 8. The plurality of displays 31, 32, and 33 each include a partially circular-arc shape, and are generally arranged in an approximately annular shape. The plurality of displays 31, 32, and 33 include the two displays 31, 32 that generally configure a half ring at one side of the approximately annular shape, and the one display 33 that generally configures a half ring at the other side of the approximately annular shape.Type: ApplicationFiled: June 27, 2017Publication date: October 12, 2017Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Koji IWAHASHI, Satoshi SUESHIMA, Tetsuo YANAGIMOTO, Yuto KUBO, Yuki KAWAFUCHI
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Patent number: 9660545Abstract: A matrix converter includes: a power convertor that includes a plurality of bidirectional switches configured to control a conducting direction using a plurality of switching elements; a command generator configured to generate a control command for a PWM control on the plurality of switching elements; and a commutation controller configured to perform a commutation control on the plurality of bidirectional switches in a case where the control command changes. In a case where the control command changes during execution of the commutation control, the commutation controller executes a handover step for handover to a next commutation control and then executes the next commutation control from a step in a course of the next commutation control.Type: GrantFiled: October 14, 2014Date of Patent: May 23, 2017Assignee: KABUSHIKI KAISHA YASKAWA DENKIInventors: Hirofumi Kinomura, Joji Ebisu, Koji Iwahashi
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Publication number: 20150102797Abstract: A matrix converter includes: a power convertor that includes a plurality of bidirectional switches configured to control a conducting direction using a plurality of switching elements; a command generator configured to generate a control command for a PWM control on the plurality of switching elements; and a commutation controller configured to perform a commutation control on the plurality of bidirectional switches in a case where the control command changes. In a case where the control command changes during execution of the commutation control, the commutation controller executes a handover step for handover to a next commutation control and then executes the next commutation control from a step in a course of the next commutation control.Type: ApplicationFiled: October 14, 2014Publication date: April 16, 2015Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Hirofumi KINOMURA, Joji EBISU, Koji IWAHASHI
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Patent number: 8918668Abstract: An interface circuit includes a general-purpose CPU configured to transmit a clock to a serial encoder with which bidirectional serial communication of clock synchronization type is to be performed, the CPU being configured to transmit and receive data to and from the serial encoder; and an additional circuit configured to detect a start bit of reception data transmitted from the serial encoder. The general-purpose CPU starts counting the number of bits of the reception data in response to a detection signal from the additional circuit, the detection signal indicating the detection of the start bit. The CPU stops transmitting the clock to the serial encoder upon completion of counting a predetermined number of bits of the reception data.Type: GrantFiled: March 5, 2012Date of Patent: December 23, 2014Assignee: Kabushiki Kaisha Yaskawa DenkiInventors: Koji Iwahashi, Hidetoshi Ryu, Satoshi Sueshima
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Publication number: 20120166857Abstract: An interface circuit includes a general-purpose CPU configured to transmit a clock to a serial encoder with which bidirectional serial communication of clock synchronization type is to be performed, the CPU being configured to transmit and receive data to and from the serial encoder; and an additional circuit configured to detect a start bit of reception data transmitted from the serial encoder. The general-purpose CPU starts counting the number of bits of the reception data in response to a detection signal from the additional circuit, the detection signal indicating the detection of the start bit. The CPU stops transmitting the clock to the serial encoder upon completion of counting a predetermined number of bits of the reception data.Type: ApplicationFiled: March 5, 2012Publication date: June 28, 2012Applicant: KABUSHIKI KAISHA YASKAWA DENKIInventors: Koji IWAHASHI, Hidetoshi Ryu, Satoshi Sueshima
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Patent number: 5603105Abstract: A baseband signal processing circuit for a radio communication apparatus has an amplifier for amplifying the amplitude of an input baseband signal, a limiter for limiting the amplitude of the amplified baseband signal, an amplitude detector for detecting the amplitude of the output signal of the amplifier, and a control unit for controlling the gain of the amplifier in response to the output of the amplitude detector. When the amplitude detector detects an amplitude greater than a predetermined level, the control unit controls the gain of the amplifier in such a manner as to maintain the output of the amplifier at a constant level. As a result, the output level of the amplifier is prevented from exceeding the limiter level of the limiter. This allows the maximum frequency transition to be set up with no regard to frequency and suppresses distortions regarding signals exceeding the standard frequency transition.Type: GrantFiled: December 29, 1993Date of Patent: February 11, 1997Assignee: NEC CorporationInventor: Koji Iwahashi
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Patent number: 5201070Abstract: A radio communication apparatus includes a transmitting portion supplied with input baseband signals for selectively transmitting the input baseband signals in response to a selection signal. The transmitting portion includes a selector for selecting one of the input baseband signals as a selected baseband signal in response to the selection signal. A level controller has a controllable gain and controls the selected baseband signal so that the selected baseband signal has a level which is determined by the controllable gain. A gain controller has predetermined gains in correspondence to the input baseband signals and controls the controllable gain in response to the selection signal so that the controllable gain becomes equal to one of the predetermined gains that corresponds to the selected baseband signal. A converter converts the selected baseband signal into a radio signal carrying the selected baseband signal. The gain controller may have a memory for memorizing the predetermined gains.Type: GrantFiled: April 20, 1990Date of Patent: April 6, 1993Assignee: NEC CorporationInventor: Koji Iwahashi
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Patent number: 5033293Abstract: An alcohol concentration detecting device is disclosed, which comprises an alcohol sensor of capacitance type having a probe portion which is to be submerged in an alcohol-mixed fuel, the alcohol sensor issuing an output signal which varies in accordance with the concentration of alcohol in the alcohol-mixed fuel; a first oscillating circuit which receives the output signal of the alcohol sensor and issues a variable pulse signal whose duty ratio is variable in accordance with the output signal; a second oscillating circuit which issues a reference pulse signal, the reference pulse signal being the same as the pulse signal which is provided by the first oscillating circuit when there is no alcohol in the fuel; and an alcohol concentration detecting circuit which receives and compares the variable pulse signal and the reference pulse signal and issues an alcohol concentration representing signal which is variable in accordance with a difference in duty ratio between the variable pulse signal and the referenceType: GrantFiled: March 9, 1990Date of Patent: July 23, 1991Assignee: Calsonic CorporationInventors: Masahiro Honma, Fumio Hagi, Yukihiro Niide, Takenosuke Sano, Koji Iwahashi
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Patent number: 4983904Abstract: A battery charger for a vehicle-mounted equipment comprises a first sensor for detecting when the voltage of the vehicle battery is higher than a specified level. A second sensor is provided for detecting when the engine of the vehicle is running. The outputs of the sensors determine the start timing of a charging operation. A switch is connected between the vehicle battery and the equipment's rechargeable battery. A timing circuit is responsive to the output signals of the first and second sensors for causing the switch to establish a path between the batteries for an interval sufficient to charge the rechargeable battery with a current supplied from the vehicle battery.Type: GrantFiled: September 21, 1989Date of Patent: January 8, 1991Assignee: NEC CorporationInventor: Koji Iwahashi
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Patent number: 4742565Abstract: A radio reciever having a plurality of intermediate frequency amplifiers and a field intensity detector. A control circuit is provided which generates a control signal for reducing the gains of the intermediate frequency amplifiers in response to an output of the field intensity detector and when a voltage associated with an input field intensity has risen beyond a predetermined level.Type: GrantFiled: March 23, 1987Date of Patent: May 3, 1988Assignee: NEC CorporationInventor: Koji Iwahashi
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Patent number: 4052172Abstract: A process and apparartus for gasifying coal or other carbon containing material in which at least a gas stream communicates which comprises providing a fluidizing bed reaction chamber disposed upstream and a jet-system reaction chamber disposed downstream, providing means for supplying an object of gasification such as coal and a gasifying agent in said jet-system reaction chamber, providing a dust removing device at the exit flue of said jet-system reaction chamber, said fluidizing bed reaction chamber having a system of supplying collected solid of said dust removing device, means for supplying a gasifying agent and means for taking out ashes.Type: GrantFiled: July 1, 1975Date of Patent: October 4, 1977Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Seiichi Shirakawa, Koji Iwahashi, Akio Nishi, Keisuke Honda, Kiyomichi Taoda