Patents by Inventor Atsushi Suhara
Atsushi Suhara 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: 11920553Abstract: A hydroelectric power generation system includes a water turbine disposed in a channel that carries a flow of a fluid, a generator driven by the water turbine, and a controller that performs a first control. The channel includes a first channel located on an inflow side of the water turbine. The controller controls, in the first control, a flow rate or a head of the water turbine so that any one of a pressure of the fluid in the first channel, a flow rate of the fluid in the first channel, and a liquid level of the fluid in a first reservoir from which the fluid flows out to the first channel approaches a first target value.Type: GrantFiled: April 15, 2022Date of Patent: March 5, 2024Assignee: Daikin Industries, Ltd.Inventors: Yoshiyuki Harada, Atsushi Suhara, Takao Sonoda
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Patent number: 11898532Abstract: A hydroelectric power generation system is included in a channel control system. The channel control system includes a command section that outputs a command value of a flow rate or pressure of a fluid, an opening degree control unit that calculates a target opening degree based on the command value, and a motor-operated valve installed in a channel through which the fluid flows. The valve opens and closes in accordance with the target opening degree. The hydroelectric power generation system includes a water turbine disposed in the channel, a generator driven by the water turbine, and a generator control unit that controls at least one of a torque and a number of rotations of the generator based on opening degree information that indicates a measured value of an actual opening degree of the valve or an opening degree estimated.Type: GrantFiled: March 23, 2022Date of Patent: February 13, 2024Assignee: Daikin Industries, Ltd.Inventors: Takahiro Abe, Atsushi Suhara, Takao Sonoda, Takahiro Yokoyama
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Patent number: 11703028Abstract: A hydroelectric power generation system includes a water turbine, a generator connected to the water turbine, and a controller. The water turbine is arranged in a flow path through which a fluid flows. The controller performs a pressure control by controlling the generator to regulate a pressure of the fluid downstream of the water turbine. The pressure control includes a first control regulating the pressure in parallel with a regenerative operation of the generator, and a second control regulating the pressure in parallel with a power running operation of the generator.Type: GrantFiled: September 22, 2021Date of Patent: July 18, 2023Assignee: Daikin Industries, Ltd.Inventors: Atsushi Suhara, Takahiro Abe, Tomomi Sakamoto
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Patent number: 11502630Abstract: A fluid apparatus includes a hydraulic machine, a rotary electric machine connected to the hydraulic machine, and a power conversion controller that converts power from the rotary electric machine. A non-normal operation is performed in a warning state that differs from a normal state in which a normal operation is continued and an anomalous state in which operation is stopped to continue a stopped condition.Type: GrantFiled: December 13, 2018Date of Patent: November 15, 2022Assignee: Daikin Industries, Ltd.Inventors: Takahiro Abe, Atsushi Suhara
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Publication number: 20220235733Abstract: A hydroelectric power generation system includes a water turbine disposed in a channel that carries a flow of a fluid, a generator driven by the water turbine, and a controller that performs a first control. The channel includes a first channel located on an inflow side of the water turbine. The controller controls, in the first control, a flow rate or a head of the water turbine so that any one of a pressure of the fluid in the first channel, a flow rate of the fluid in the first channel, and a liquid level of the fluid in a first reservoir from which the fluid flows out to the first channel approaches a first target value.Type: ApplicationFiled: April 15, 2022Publication date: July 28, 2022Inventors: Yoshiyuki HARADA, Atsushi SUHARA, Takao SONODA
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Publication number: 20220213864Abstract: A hydroelectric power generation system is included in a channel control system. The channel control system includes a command section that outputs a command value of a flow rate or pressure of a fluid, an opening degree control unit that calculates a target opening degree based on the command value, and a motor-operated valve installed in a channel through which the fluid flows. The valve opens and closes in accordance with the target opening degree. The hydroelectric power generation system includes a water turbine disposed in the channel, a generator driven by the water turbine, and a generator control unit that controls at least one of a torque and a number of rotations of the generator based on opening degree information that indicates a measured value of an actual opening degree of the valve or an opening degree estimated.Type: ApplicationFiled: March 23, 2022Publication date: July 7, 2022Inventors: Takahiro ABE, Atsushi SUHARA, Takao SONODA, Takahiro YOKOYAMA
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Patent number: 11313343Abstract: A hydroelectric power generation system includes: a generator driven by the hydraulic turbine; a head adjuster adjusting an effective head of the hydraulic turbine; and a controller cooperatively executing: flow rate control for controlling the generator such that a flow rate in the hydraulic turbine is brought close to a target flow rate; and head adjusting control for adjusting the effective head of the hydraulic turbine using the head adjuster such that the effective head of the hydraulic turbine falls within a first range.Type: GrantFiled: January 22, 2018Date of Patent: April 26, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Takahiro Abe, Atsushi Suhara, Takahiro Yokoyama
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Publication number: 20220010764Abstract: A hydroelectric power generation system includes a water turbine, a generator connected to the water turbine, and a controller. The water turbine is arranged in a flow path through which a fluid flows. The controller performs a pressure control by controlling the generator to regulate a pressure of the fluid downstream of the water turbine. The pressure control includes a first control regulating the pressure in parallel with a regenerative operation of the generator, and a second control regulating the pressure in parallel with a power running operation of the generator.Type: ApplicationFiled: September 22, 2021Publication date: January 13, 2022Inventors: Atsushi SUHARA, Takahiro ABE, Tomomi SAKAMOTO
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Patent number: 11118558Abstract: A hydraulic power generation system is provided with a control unit which controls the power supply circuit to perform a normal operation of supplying power from the power system to a predetermined electric device provided at the water channel and an autonomous operation of supplying the power generated by the electric generator to the electric device. The control unit executes the autonomous operation when the power system fails.Type: GrantFiled: September 14, 2017Date of Patent: September 14, 2021Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Takahiro Abe, Atsushi Suhara, Tomomi Sakamoto
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Patent number: 11041476Abstract: An electric power information acquisition unit is provided for acquiring power supply-and-demand information including electric power acceptable to an electric power system or information correlated with the electric power. A fluid information acquisition unit is provided for acquiring fluid information including information correlated with a physical quantity of a fluid flowing out of a channel. A controller is provided for controlling at least one of the physical quantity, the channel or electric power generated or electric power to be generated by a generator by using the fluid information so that the physical quantity becomes equal to a desired value, while controlling electric power to be supplied to the electric power system to the electric power acceptable to the electric power system or less, by using the power supply-and-demand information.Type: GrantFiled: September 11, 2017Date of Patent: June 22, 2021Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Takahiro Abe, Atsushi Suhara, Takahiro Yokoyama
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Patent number: 11035337Abstract: A hydroelectric generation system includes a fluid machine disposed in a penstock or channel, a generator driven by the fluid machine, and a control unit configured to generate a predetermined torque in the generator. Fluid flows through the penstock or channel. The penstock or channel has a main path in which the fluid machine is disposed, and a detour disposed in parallel with the main path. The detour includes an on-off valve. The on-off valve is opened when not electrified, and closed when electrified.Type: GrantFiled: September 11, 2018Date of Patent: June 15, 2021Assignee: Daikin Industries, Ltd.Inventors: Takahiro Abe, Atsushi Suhara, Yoshiyuki Harada, Tomomi Sakamoto, Yusuke Irino
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Publication number: 20200386202Abstract: An electric power information acquisition unit is provided for acquiring power supply-and-demand information including electric power acceptable to an electric power system or information correlated with the electric power. A fluid information acquisition unit is provided for acquiring fluid information including information correlated with a physical quantity of a fluid flowing out of a channel. A controller is provided for controlling at least one of the physical quantity, the channel or electric power generated or electric power to be generated by a generator by using the fluid information so that the physical quantity becomes equal to a desired value, while controlling electric power to be supplied to the electric power system to the electric power acceptable to the electric power system or less, by using the power supply-and-demand information.Type: ApplicationFiled: September 11, 2017Publication date: December 10, 2020Applicant: Daikin Industries, Ltd.Inventors: Takahiro ABE, Atsushi SUHARA, Takahiro YOKOYAMA
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Publication number: 20200313585Abstract: A fluid apparatus includes a hydraulic machine, a rotary electric machine connected to the hydraulic machine, and a power conversion controller that converts power from the rotary electric machine. A non-normal operation is performed in a warning state that differs from a normal state in which a normal operation is continued and an anomalous state in which operation is stopped to continue a stopped condition.Type: ApplicationFiled: December 13, 2018Publication date: October 1, 2020Inventors: Takahiro ABE, Atsushi SUHARA
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Publication number: 20200277929Abstract: A hydroelectric generation system includes a fluid machine disposed in a penstock or channel, a generator driven by the fluid machine, and a control unit configured to generate a predetermined torque in the generator. Fluid flows through the penstock or channel. The penstock or channel has a main path in which the fluid machine is disposed, and a detour disposed in parallel with the main path. The detour includes an on-off valve. The on-off valve is opened when not electrified, and closed when electrified.Type: ApplicationFiled: September 11, 2018Publication date: September 3, 2020Inventors: Takahiro ABE, Atsushi SUHARA, Yoshiyuki HARADA, Tomomi SAKAMOTO, Yusuke IRINO
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Publication number: 20190331086Abstract: A hydroelectric power generation system includes: a generator driven by the hydraulic turbine; a head adjuster adjusting an effective head of the hydraulic turbine; and a controller cooperatively executing: flow rate control for controlling the generator such that a flow rate in the hydraulic turbine is brought close to a target flow rate; and head adjusting control for adjusting the effective head of the hydraulic turbine using the head adjuster such that the effective head of the hydraulic turbine falls within a first range.Type: ApplicationFiled: January 22, 2018Publication date: October 31, 2019Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takahiro ABE, Atsushi SUHARA, Takahiro YOKOYAMA
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Publication number: 20190271291Abstract: A hydraulic power generation system is provided with a control unit which controls the power supply circuit to perform a normal operation of supplying power from the power system to a predetermined electric device provided at the water channel and an autonomous operation of supplying the power generated by the electric generator to the electric device. The control unit executes the autonomous operation when the power system fails.Type: ApplicationFiled: September 14, 2017Publication date: September 5, 2019Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takahiro ABE, Atsushi SUHARA, Tomomi SAKAMOTO
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Patent number: 10352293Abstract: A control device estimates a flow rate and an effective height difference of a fluid machine based on a characteristic detectable with regard to a rotating electrical machine and correlating with the flow rate and the effective height difference of the fluid machine. A total flow rate in a pipe system is estimated based on these values estimated by the control device and a flow resistance characteristic line, and cooperative control of the fluid machine and the flow rate control valve is performed such that the estimated value of the total flow rate becomes close to a target flow rate of the total flow rate in the pipe system.Type: GrantFiled: October 23, 2015Date of Patent: July 16, 2019Assignee: Daikin Industries, Ltd.Inventors: Tomomi Sakamoto, Atsushi Suhara
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Patent number: 10233942Abstract: A fluid device having a fluid machine and a rotary electric machine includes a fluid machine and a rotary electric machine connected to a rotating shaft of the fluid machine. A cooler is arranged for carrying out liquid-cooling using a fluid of a cooling pipe connecting an upstream portion and a downstream portion of the fluid machine to bypass the fluid machine. The fluid machine and the rotary electric machine are detachably coupled to each other. Hence, the rotary electric machine can enhance the cooling performance for the rotary electric machine and reduce its size, achieving improvements in maintainability and serviceability.Type: GrantFiled: November 20, 2013Date of Patent: March 19, 2019Assignee: Daikin Industries, Ltd.Inventors: Tomomi Sakamoto, Hiroyuki Ikegami, Atsushi Suhara, Yuzou Sawada
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Publication number: 20170314527Abstract: A control device estimates a flow rate and an effective height difference of a fluid machine based on a characteristic detectable with regard to a rotating electrical machine and correlating with the flow rate and the effective height difference of the fluid machine. A total flow rate in a pipe system is estimated based on these values estimated by the control device and a flow resistance characteristic line, and cooperative control of the fluid machine and the flow rate control valve is performed such that the estimated value of the total flow rate becomes close to a target flow rate of the total flow rate in the pipe system.Type: ApplicationFiled: October 23, 2015Publication date: November 2, 2017Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tomomi SAKAMOTO, Atsushi SUHARA
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Publication number: 20150369258Abstract: A fluid device having a fluid machine and a rotary electric machine includes a fluid machine and a rotary electric machine connected to a rotating shaft of the fluid machine. A cooler is arranged for carrying out liquid-cooling using a fluid of a cooling pipe connecting an upstream portion and a downstream portion of the fluid machine to bypass the fluid machine. The fluid machine and the rotary electric machine are detachably coupled to each other. Hence, the rotary electric machine can enhance the cooling performance for the rotary electric machine and reduce its size, achieving improvements in maintainability and serviceability.Type: ApplicationFiled: November 20, 2013Publication date: December 24, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tomomi SAKAMOTO, Hiroyuki IKEGAMI, Atsushi SUHARA, Yuzou SAWADA