Patents by Inventor Yo Muramatsu
Yo Muramatsu 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: 10161771Abstract: A measurement device includes: a casing that includes a first air duct with an air inlet; a straightening grid; a first chamber; an opening plate including an opening; a second chamber; pressure sensors configured to measure a first pressure, a second pressure, and a third pressure, the first pressure being air pressure from the air inlet to the straightening grid, the second pressure being air pressure in the first chamber, the third pressure being air pressure in the second chamber; a specific opening configured to allow the opening plate to be replaceable; an open/close portion configured to open and close the specific opening; and a duct forming a second air duct between the measurement device and a measurement target.Type: GrantFiled: September 7, 2016Date of Patent: December 25, 2018Assignee: SANYO DENKI CO., LTD.Inventors: Masahiro Koike, Tomoaki Ikeda, Takahisa Toda, Yo Muramatsu, Katsumichi Ishihara, Hikaru Urushimoto
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Patent number: 10036660Abstract: A measurement device for measuring an airflow volume of a wind-blowing apparatus includes, a housing that includes an air duct with an air inlet and an air outlet, the air inlet being configured to take in air, the air outlet being configured to send out the taken air, an opening member installed inside the air duct, the opening member including an opening allowing the air taken from the air inlet to pass therethrough, pressure sensors configured to measure air pressures before and after the air passes through the opening member in the air duct, and an orifice provided on the opening member to change a size of the opening.Type: GrantFiled: August 15, 2016Date of Patent: July 31, 2018Assignee: SANYO DENKI CO., LTD.Inventors: Katsumichi Ishihara, Takahisa Toda, Yo Muramatsu, Masahiro Koike, Hikaru Urushimoto
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Patent number: 9874215Abstract: A fan motor control unit includes sensor units that each detect a rotational position of the fan motor, a switching unit that selectively connects each of stator coils of the fan motor to a rectifier circuit, a current sensor that detects a current flowing in the fan motor, and a switching control unit that advances, in the case where the current detected by the current sensor exceeds a threshold, a energization timing from the rectifier circuit to the stator coils with respect to the energization timing applied while the current detected by the current sensor is lower than the threshold, on the basis of the rotational position detected by the sensor units.Type: GrantFiled: June 11, 2014Date of Patent: January 23, 2018Assignee: Sanyo Denki Co., Ltd.Inventors: Yo Muramatsu, Takahisa Toda, Kenta Nishimaki
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Measurement device for measuring airflow volume and ventilation resistance of wind-blowing apparatus
Patent number: 9857209Abstract: A measurement device for measuring an airflow volume and a ventilation resistance of a wind-blowing apparatus includes: a housing that includes an air duct with an air inlet and an air outlet, the air inlet being configured to take in air, the air outlet being configured to send out the taken air; an opening member installed inside the air duct, the opening member including an opening allowing the air taken from the air inlet to pass therethrough; pressure sensors configured to measure air pressures before and after the air passes through the opening member in the air duct; and an opening member replacing mechanism that forms a part of the air duct, the opening member replacing mechanism being configured to allow the opening member to be replaceable.Type: GrantFiled: March 1, 2016Date of Patent: January 2, 2018Assignee: SANYO DENKI CO., LTD.Inventors: Katsumichi Ishihara, Takahisa Toda, Yo Muramatsu -
Publication number: 20170067765Abstract: A measurement device includes: a casing that includes a first air duct with an air inlet; a straightening grid; a first chamber; an opening plate including an opening; a second chamber; pressure sensors configured to measure a first pressure, a second pressure, and a third pressure, the first pressure being air pressure from the air inlet to the straightening grid, the second pressure being air pressure in the first chamber, the third pressure being air pressure in the second chamber; a specific opening configured to allow the opening plate to be replaceable; an open/close portion configured to open and close the specific opening; and a duct forming a second air duct between the measurement device and a measurement target.Type: ApplicationFiled: September 7, 2016Publication date: March 9, 2017Inventors: Masahiro KOIKE, Tomoaki IKEDA, Takahisa TODA, Yo MURAMATSU, Katsumichi ISHIHARA, Hikaru URUSHIMOTO
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Publication number: 20170052045Abstract: A measurement device for measuring an airflow volume of a wind-blowing apparatus includes, a housing that includes an air duct with an air inlet and an air outlet, the air inlet being configured to take in air, the air outlet being configured to send out the taken air, an opening member installed inside the air duct, the opening member including an opening allowing the air taken from the air inlet to pass therethrough, pressure sensors configured to measure air pressures before and after the air passes through the opening member in the air duct, and an orifice provided on the opening member to change a size of the opening.Type: ApplicationFiled: August 15, 2016Publication date: February 23, 2017Inventors: Katsumichi ISHIHARA, Takahisa TODA, Yo MURAMATSU, Masahiro KOIKE, Hikaru URUSHIMOTO
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Publication number: 20160258791Abstract: A measurement device for measuring an airflow volume and a ventilation resistance of a wind-blowing apparatus includes: a housing that includes an air duct with an air inlet and an air outlet, the air inlet being configured to take in air, the air outlet being configured to send out the taken air; an opening member installed inside the air duct, the opening member including an opening allowing the air taken from the air inlet to pass therethrough; pressure sensors configured to measure air pressures before and after the air passes through the opening member in the air duct; and an opening member replacing mechanism that forms a part of the air duct, the opening member replacing mechanism being configured to allow the opening member to be replaceable.Type: ApplicationFiled: March 1, 2016Publication date: September 8, 2016Inventors: Katsumichi ISHIHARA, Takahisa TODA, Yo MURAMATSU
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Patent number: 9246422Abstract: A motor control device includes an energization pattern output portion and an inverter circuit. The energization pattern output portion cyclically outputs a plurality of energization patterns. The inverter circuit selectively connects respective coils provided in a motor to a rectifier circuit according to the output energization pattern. The energization pattern output portion delays the output timing of the energization pattern according to a rotation speed of the motor.Type: GrantFiled: August 28, 2013Date of Patent: January 26, 2016Assignee: SANYO DENKI CO., LTD.Inventors: Yo Muramatsu, Takahisa Toda
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Patent number: 9219435Abstract: A motor control device includes an energization pattern output portion and an inverter circuit. The energization pattern output portion cyclically outputs a plurality of energization patterns. The inverter circuit selectively connects respective coils provided in a motor to a rectifier circuit according to the output energization pattern. The energization pattern output portion delays the output timing of the energization pattern according to a rotation speed of the motor.Type: GrantFiled: August 28, 2013Date of Patent: December 22, 2015Assignee: SANYO DENKI CO., LTD.Inventors: Yo Muramatsu, Takahisa Toda
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Patent number: 9178460Abstract: A motor controller according to the invention includes a driving IC and a magnetic sensor. The driving IC receives a driving signal for driving a motor and controls the rotation speed of the motor using the driving signal. The magnetic sensor detects the rotation speed of the motor. The driving IC includes a sensor signal output terminal and a driving signal input terminal. The sensor signal output terminal outputs a sensor signal generated by the driving IC based on a pulse signal from the magnetic sensor. The driving signal input terminal receives the driving signal. The sensor signal output terminal and the driving signal input terminal are connected by a connecting portion. The driving IC rotates the motor at a first rotation speed different from the rotation speed of the motor driven according to the driving signal using the sensor signal input to the driving signal input terminal.Type: GrantFiled: July 17, 2013Date of Patent: November 3, 2015Assignee: SANYO DENKI CO., LTD.Inventors: Toshiyuki Nakamura, Yo Muramatsu
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Publication number: 20140369813Abstract: A fan motor control unit includes sensor units that each detect a rotational position of the fan motor, a switching unit that selectively connects each of stator coils of the fan motor to a rectifier circuit, a current sensor that detects a current flowing in the fan motor, and a switching control unit that advances, in the case where the current detected by the current sensor exceeds a threshold, a energization timing from the rectifier circuit to the stator coils with respect to the energization timing applied while the current detected by the current sensor is lower than the threshold, on the basis of the rotational position detected by the sensor units.Type: ApplicationFiled: June 11, 2014Publication date: December 18, 2014Inventors: Yo Muramatsu, Takahisa Toda, Kenta Nishimaki
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Patent number: 8847525Abstract: To provide a motor control device which can apply an electric brake to a motor when power supply is stopped, and achieve a miniaturization and a cost reduction. A first switch 11 through a sixth switch 16 connects respective coils L1, L2 and L3 included in a motor to an electric power source 20. The capacitor C accumulates the power supplied from the electric power source 20. A seventh switch 17 connects the capacitor C to a fourth switch 14 through the sixth switch 16, when the power supply from the electric power source 20 is stopped. The operation of the seventh switch 17 causes the fourth switch 14 through the sixth switch 16 to operate by the power accumulated in the capacitor C, and respective coils L1 to L3 are short-circuited to apply the brake to the motor.Type: GrantFiled: January 23, 2013Date of Patent: September 30, 2014Assignee: Sanyo Denki Co., Ltd.Inventors: Noriaki Taniguchi, Takahisa Toda, Yo Muramatsu
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Publication number: 20140062360Abstract: A motor control device includes an energization pattern output portion and an inverter circuit. The energization pattern output portion cyclically outputs a plurality of energization patterns. The inverter circuit selectively connects respective coils provided in a motor to a rectifier circuit according to the output energization pattern. The energization pattern output portion delays the output timing of the energization pattern according to a rotation speed of the motor.Type: ApplicationFiled: August 28, 2013Publication date: March 6, 2014Applicant: SANYO DENKI CO., LTD.Inventors: Yo Muramatsu, Takahisa Toda
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Publication number: 20140021902Abstract: A motor controller according to the invention includes a driving IC and a magnetic sensor. The driving IC receives a driving signal for driving a motor and controls the rotation speed of the motor using the driving signal. The magnetic sensor detects the rotation speed of the motor. The driving IC includes a sensor signal output terminal and a driving signal input terminal. The sensor signal output terminal outputs a sensor signal generated by the driving IC based on a pulse signal from the magnetic sensor. The driving signal input terminal receives the driving signal. The sensor signal output terminal and the driving signal input terminal are connected by a connecting portion. The driving IC rotates the motor at a first rotation speed different from the rotation speed of the motor driven according to the driving signal using the sensor signal input to the driving signal input terminal.Type: ApplicationFiled: July 17, 2013Publication date: January 23, 2014Inventors: Toshiyuki Nakamura, Yo Muramatsu