Patents Assigned to Microspace Corporation
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Patent number: 10870355Abstract: This motor driving control apparatus has (A) an inverter unit configured to drive a motor; (B) a separation switch configured to separate a power source from the inverter unit; and (C) a controller configured to instruct the separation switch to separate the power source from the inverter unit and control the inverter unit to perform switching according to a speed and a braking target torque, upon detecting an event that braking should be performed without passing a regenerative current to the power source from the inverter unit. By introducing the separation switch that operates as described above, it becomes possible to perform control so as to consume the power by the motor itself without passing the regenerative current to the power source such as a battery.Type: GrantFiled: November 15, 2018Date of Patent: December 22, 2020Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato Tanaka, Yasuo Hosaka, Hiromi Hagiwara, Teruaki Kawahigashi, Yuto Kajiya, Taichi Yanaoka
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Patent number: 10432115Abstract: A motor driving control apparatus in embodiments includes: a first signal generator to generate a first signal representing any one rotation angle section of plural rotation angle sections according to a sensor signal that changes every predetermined rotation angle of a rotor; a measurement unit to measure a period of each of the rotation angle sections; a prediction unit to predict a period of a next rotation section based on one or plural measured rotation angle sections; a second signal generator to generate a second signal representing a relative rotation angle of the rotor in the next rotation angle section for each period obtained by dividing the predicted period by a predetermined number; and a third signal generator to generate a third signal corresponding to a rotation angle of the rotor based on the first and second signals.Type: GrantFiled: December 29, 2016Date of Patent: October 1, 2019Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato Tanaka, Hiromi Hagiwara, Kazuo Asanuma, Hirokazu Shirakawa
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Publication number: 20190084426Abstract: This motor driving control apparatus has (A) an inverter unit configured to drive a motor; (B) a separation switch configured to separate a power source from the inverter unit; and (C) a controller configured to instruct the separation switch to separate the power source from the inverter unit and control the inverter unit to perform switching according to a speed and a braking target torque, upon detecting an event that braking should be performed without passing a regenerative current to the power source from the inverter unit. By introducing the separation switch that operates as described above, it becomes possible to perform control so as to consume the power by the motor itself without passing the regenerative current to the power source such as a battery.Type: ApplicationFiled: November 15, 2018Publication date: March 21, 2019Applicants: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato TANAKA, Yasuo HOSAKA, Hiromi HAGIWARA, Teruaki KAWAHIGASHI, Yuto KAJIYA, Taichi YANAOKA
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Patent number: 10099558Abstract: A motor driving apparatus includes a driving unit configured to drive a motor according to a torque inputted by a rotation input from a human being; and a controller configured to control driving of the driving unit according to a relationship between an accumulated value of first amounts that correspond to the rotation input from the human being and an accumulated value of second amounts that correspond to rotation of a rotating object driven by the motor. The controller may be further configured to cause the driving unit to suppress driving of the motor when an accumulated difference that is calculated by subtracting the accumulated value of the second amounts from the accumulated value of the first amounts is equal to or less than a predetermined threshold.Type: GrantFiled: January 21, 2016Date of Patent: October 16, 2018Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato Tanaka, Yasuo Hosaka, Hirokazu Shirakawa, Taichi Yanaoka
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Patent number: 10040508Abstract: This motor driving control apparatus includes (A) a driving unit that drives a motor, and (B) a regeneration control unit that controls the driving unit so as to generate a regenerative 5 braking force in accordance with a vehicle acceleration, a vehicle speed and a pedal-rotation converted speed that is obtained from a pedal rotation.Type: GrantFiled: May 16, 2017Date of Patent: August 7, 2018Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato Tanaka, Yasuo Hosaka, Kazuo Asanuma, Hiromi Hagiwara, Satoru Shimizu
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Patent number: 9896153Abstract: This motor driving control apparatus includes (A) a driving unit that drives a motor, and (B) a regeneration control unit that controls the driving unit so as to generate a regenerative braking force in accordance with a vehicle acceleration, a vehicle speed and a pedal-rotation converted speed that is obtained from a pedal rotation.Type: GrantFiled: June 13, 2014Date of Patent: February 20, 2018Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato Tanaka, Yasuo Hosaka, Kazuo Asanuma, Hiromi Hagiwara, Satoru Shimizu
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Publication number: 20170247079Abstract: This motor driving control apparatus includes (A) a driving unit that drives a motor, and (B) a regeneration control unit that controls the driving unit so as to generate a regenerative 5 braking force in accordance with a vehicle acceleration, a vehicle speed and a pedal-rotation converted speed that is obtained from a pedal rotation.Type: ApplicationFiled: May 16, 2017Publication date: August 31, 2017Applicants: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato Tanaka, Yasuo Hosaka, Kazuo Asanuma, Hiromi Hagiwara, Satoru Shimizu
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Publication number: 20170110994Abstract: A motor driving control apparatus in embodiments includes: a first signal generator to generate a first signal representing any one rotation angle section of plural rotation angle sections according to a sensor signal that changes every predetermined rotation angle of a rotor; a measurement unit to measure a period of each of the rotation angle sections; a prediction unit to predict a period of a next rotation section based on one or plural measured rotation angle sections; a second signal generator to generate a second signal representing a relative rotation angle of the rotor in the next rotation angle section for each period obtained by dividing the predicted period by a predetermined number; and a third signal generator to generate a third signal corresponding to a rotation angle of the rotor based on the first and second signals.Type: ApplicationFiled: December 29, 2016Publication date: April 20, 2017Applicants: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato TANAKA, Hiromi Hagiwara, Kazuo Asanuma, Hirokazu Shirakawa
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Patent number: 9428172Abstract: An appropriate motor control in accordance with a pedal operation of a driver is to be achieved. A motor drive control device according to the present invention is a motor drive control device for an electric power-assisted vehicle that has one-way clutches respectively provided for a motor drive system and for a pedal drive system. The motor drive control device according to the present invention includes: a first calculating part that calculates a pedal rotation conversion speed that is converted from a pedal rotation; and a second calculating part that calculates a second target torque for a motor based on the pedal rotation conversion speed, during a period in which a first target torque derived from a pedal torque is not detected.Type: GrantFiled: May 3, 2013Date of Patent: August 30, 2016Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato Tanaka, Kazuo Asanuma, Yasuo Hosaka, Kuniaki Kawagoe
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Publication number: 20160221445Abstract: A motor driving apparatus includes a driving unit configured to drive a motor according to a torque inputted by a rotation input from a human being; and a controller configured to control driving of the driving unit according to a relationship between an accumulated value of first amounts that correspond to the rotation input from the human being and an accumulated value of second amounts that correspond to rotation of a rotating object driven by the motor. The controller may be further configured to cause the driving unit to suppress driving of the motor when an accumulated difference that is calculated by subtracting the accumulated value of the second amounts from the accumulated value of the first amounts is equal to or less than a predetermined threshold.Type: ApplicationFiled: January 21, 2016Publication date: August 4, 2016Applicants: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato TANAKA, Yasuo HOSAKA, Hirokazu SHIRAKAWA, Taichi YANAOKA
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Publication number: 20160121963Abstract: This motor driving control apparatus includes (A) a driving unit that drives a motor, and (B) a regeneration control unit that controls the driving unit so as to generate a regenerative braking force in accordance with a vehicle acceleration, a vehicle speed and a pedal-rotation converted speed that is obtained from a pedal rotation.Type: ApplicationFiled: June 13, 2014Publication date: May 5, 2016Applicants: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato TANAKA, Yasuo HOSAKA, Kazuo ASANUMA, Hiromi HAGIWARA, Satoru SHIMIZU
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Patent number: 9162730Abstract: A motor drive control apparatus for performing motor control that is stable and has a good efficiency includes: a speed processing unit that generates a first value by converting a second value corresponding to a current speed into a duty ratio; a torque processing unit that generates a third value by converting a fourth value corresponding to a target torque into the duty ratio; and a drive unit that controls switching by a switch included in a complementary switching amplifier by an average duty ratio corresponding to a sum of the first value and the third value to drive a motor connected to the complementary switching amplifier.Type: GrantFiled: December 13, 2011Date of Patent: October 20, 2015Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato Tanaka, Kazuo Asanuma, Yasuo Hosaka
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Patent number: 9120531Abstract: This motor driving control apparatus includes: a smoothing processing unit that executes smoothing processing using values of pedal input torque at plural points to calculate a first smoothed torque value; an insufficiency output unit that obtains a rate of points at which input of the pedal input torque is insufficient among the plural points; an assist torque calculating unit that performs calculation processing of mixing the first torque value calculated by the smoothing processing unit and the pedal input torque in accordance with output of the insufficient output unit to calculate assist torque; and a driving processing unit that performs processing to drive a motor using the assist torque calculated by the assist torque calculating unit.Type: GrantFiled: December 13, 2011Date of Patent: September 1, 2015Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato Tanaka, Kazuo Asanuma, Yasuo Hosaka
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Patent number: 9114850Abstract: A motor drive control device of an electric power-assisted vehicle that has a gear shifter and a motor, and in which a first ratio of the number of drive rotations in the motor to the number of drive rotations of a pedal changes based on changes in a gear ratio in the gear shifter, includes: a gear ratio obtaining part that obtains the gear ratio of the gear shifter; and a calculating part that calculates an assist torque, which is a target value for a drive torque of the motor, from the pedal input torque based on the gear ratio obtained by the gear ratio obtaining part.Type: GrantFiled: March 27, 2013Date of Patent: August 25, 2015Assignees: MICROSPACE CORPORATION, TAIYO YUDEN CO., LTD.Inventors: Masato Tanaka, Kazuo Asanuma, Yasuo Hosaka, Hirokazu Shirakawa
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Publication number: 20140039741Abstract: This motor driving control apparatus includes: a smoothing processing unit that executes smoothing processing using values of pedal input torque at plural points to calculate a first smoothed torque value; an insufficiency output unit that obtains a rate of points at which input of the pedal input torque is insufficient among the plural points; an assist torque calculating unit that performs calculation processing of mixing the first torque value calculated by the smoothing processing unit and the pedal input torque in accordance with output of the insufficient output unit to calculate assist torque; and a driving processing unit that performs processing to drive a motor using the assist torque calculated by the assist torque calculating unit.Type: ApplicationFiled: December 13, 2011Publication date: February 6, 2014Applicants: TAIYO YUDEN CO., LTD., MICROSPACE CORPORATIONInventors: Masato Tanaka, Kazuo Asanuma, Yasuo Hosaka
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Publication number: 20140039742Abstract: A motor drive control apparatus for performing motor control that is stable and has a good efficiency includes: a speed processing unit that generates a first value by converting a second value corresponding to a current speed into a duty ratio; a torque processing unit that generates a third value by converting a fourth value corresponding to a target torque into the duty ratio; and a drive unit that controls switching by a switch included in a complementary switching amplifier by an average duty ratio corresponding to a sum of the first value and the third value to drive a motor connected to the complementary switching amplifier.Type: ApplicationFiled: December 13, 2011Publication date: February 6, 2014Applicants: TAIYO YUDEN CO., LTD., MICROSPACE CORPORATIONInventors: Masato Tanaka, Kazuo Asanuma, Yasuo Hosaka
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Publication number: 20130317679Abstract: An appropriate motor control in accordance with a pedal operation of a driver is to be achieved. A motor drive control device according to the present invention is a motor drive control device for an electric power-assisted vehicle that has one-way clutches respectively provided for a motor drive system and for a pedal drive system. The motor drive control device according to the present invention includes: a first calculating part that calculates a pedal rotation conversion speed that is converted from a pedal rotation; and a second calculating part that calculates a second target torque for a motor based on the pedal rotation conversion speed, during a period in which a first target torque derived from a pedal torque is not detected.Type: ApplicationFiled: May 3, 2013Publication date: November 28, 2013Applicants: TAIYO YUDEN CO., LTD., MICROSPACE CORPORATIONInventors: Masato TANAKA, Kazuo ASANUMA, Yasuo HOSAKA, Kuniaki KAWAGOE
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Publication number: 20130311019Abstract: A motor drive control device of an electric power-assisted vehicle that has a gear shifter and a motor, and in which a first ratio of the number of drive rotations in the motor to the number of drive rotations of a pedal changes based on changes in a gear ratio in the gear shifter, includes: a gear ratio obtaining part that obtains the gear ratio of the gear shifter; and a calculating part that calculates an assist torque, which is a target value for a drive torque of the motor, from the pedal input torque based on the gear ratio obtained by the gear ratio obtaining part.Type: ApplicationFiled: March 27, 2013Publication date: November 21, 2013Applicants: TAIYO YUDEN CO., LTD., MICROSPACE CORPORATIONInventors: Masato TANAKA, Kazuo ASANUMA, Yasuo HOSAKA, Hirokazu SHIRAKAWA
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Patent number: 8487950Abstract: An overflow suppression technique that is effective for avoiding degradation in image quality is provided. A fundamental waveform and detail is extracted out of an input RGB signal. A suppression gain generation unit 614 generates a suppression gain from the extracted fundamental waveform. Multipliers 612a and 612b multiply the detail and the fundamental waveform by the generated suppression gain, respectively. Then, an adder 626 combines them together for a mixed output. Alternatively, equalization processing is performed as follows. A low frequency component fundamental waveform is obtained as a result of the passing of an input RGB signal through a low pass filter 622. A suppression gain is generated from the low frequency component fundamental waveform. Then, the input itself is multiplied by the suppression gain to obtain an output.Type: GrantFiled: October 27, 2008Date of Patent: July 16, 2013Assignees: Taiyo Yuden Co. Ltd., Microspace CorporationInventors: Masato Tanaka, Kazuo Asanuma, Mamoru Sakamoto, Yasuo Hosaka, Akinobu Maekawa, Hidehumi Nakagome
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Patent number: 7408306Abstract: The present invention relates to a lamp lighting technique for lighting multiple lamps safely without luminance irregularities. The present lamp lighting circuit includes multiple closed loops wherein a predetermined number of lamps and the secondary windings of the predetermined number of transformers are connected serially. At least one of the primary windings of the transformers employed for each closed loop is connected to the primary winding of the transformer employed for another closed loop serially. Thus, current of the lamps included in the closed loop is made uniform, and also current is made uniform even between the closed loops by connecting the primary windings of the transformers serially. According to the present invention, with regard to serial connection of the primary windings of the transformers, even if the number of transformers is limited, current uniformity can be propagated to the entirety by subjecting closed loops to catenation consecutively.Type: GrantFiled: August 5, 2005Date of Patent: August 5, 2008Assignees: Taiyo Yuden, Ltd., Microspace CorporationInventors: Masato Tanaka, Yasuo Hosaka, Mamoru Sakamoto, Akinobu Maekawa, Hidefumi Nakagome