Patents by Inventor Kenichi Kishimoto
Kenichi Kishimoto 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: 10985684Abstract: A motor control device includes a control and computation unit, a compensation signal generation unit, an adder, and a drive unit. The control and computation unit is configured to perform computation processing based on a detected rotational position of a motor and a positional instruction, and to generate a first torque instruction signal to be used to drive the motor. The compensation signal generation unit is configured to generate a torque compensation signal to be used to compensate the first torque instruction signal. The adder is configured to add the torque compensation signal to the first torque instruction signal, and to output an acquired signal as a second torque instruction signal. The drive unit is configured to generate a drive signal to be used to power-drive winding wires of the motor based on the second torque instruction signal.Type: GrantFiled: February 14, 2017Date of Patent: April 20, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventor: Kenichi Kishimoto
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Publication number: 20190260322Abstract: A motor control device includes a control and computation unit, a compensation signal generation unit, an adder, and a drive unit. The control and computation unit is configured to perform computation processing based on a detected rotational position of a motor and a positional instruction, and to generate a first torque instruction signal to be used to drive the motor. The compensation signal generation unit is configured to generate a torque compensation signal to be used to compensate the first torque instruction signal. The adder is configured to add the torque compensation signal to the first torque instruction signal, and to output an acquired signal as a second torque instruction signal. The drive unit is configured to generate a drive signal to be used to power-drive winding wires of the motor based on the second torque instruction signal.Type: ApplicationFiled: February 14, 2017Publication date: August 22, 2019Inventor: KENICHI KISHIMOTO
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Publication number: 20160202088Abstract: Angle position detection device (102) of the present invention includes resolver (101), sampling instruction signal generator (107), first analog-digital converter (103), second analog-digital converter (104), and resolver digital converter (105). Resolver (101) outputs an A-phase signal and a B-phase signal having a phase difference of 90 degrees relative to the A-phase signal. When first analog-digital converter (103) and second analog-digital converter (104) receives a sampling instruction signal, first analog-digital converter (103) and second analog-digital converter (104) convert the A-phase and B-phase signals received from resolver (101) into digital values to output a first AD converted value and a second AD converted value, respectively. Resolver digital converter (105) calculates angle data indicating an angle position in resolver (101) based on the input first AD converted value and second AD converted value. Resolver digital converter (105) outputs the calculated angle data.Type: ApplicationFiled: August 27, 2014Publication date: July 14, 2016Inventor: KENICHI KISHIMOTO
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Patent number: 9219439Abstract: An electric motor control device includes a current vector controller that follows a target command value for controlling an electric current of the motor by separating the current into a d-axis current and q-axis current orthogonal to each other. The motor control device further includes a driver for driving the motor, a phase-angle generator a phase-angle command generator for generating a phase-angle command ?* based on difference ?v* between an absolute value |v*| of a voltage command supplied from the current vector controller to the driver and a given reference value Vlmt, a d-axis current command generator for generating d-axis current command id* based on a sine value of the phase-angle command ?*, and a q-axis current limiter for setting a limit value of q-axis current command iq* based on a cosine value of the phase-angle command ?*.Type: GrantFiled: December 3, 2012Date of Patent: December 22, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Ryuta Sasaki, Kenichi Kishimoto
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Patent number: 9054623Abstract: A motor control device according to the present invention includes a motor driving unit for driving a motor, a current vector controller, a magnetic-flux weakening current command generator, and one of a target command limiter and a q-axis current command limiter. The current vector controller controls a current of the motor by separating the current into a d-axis current and a q-axis current orthogonal to each other, in accordance with a target command value from the outside. The magnetic-flux weakening current command generator generates a d-axis current command to control the amount of the d-axis current, based on one of differences, i.e. a difference between a first predetermined reference value and the absolute value of a voltage command from the current vector controller to the motor driving unit and a difference between a second predetermined reference value and a q-axis component of the voltage command.Type: GrantFiled: July 25, 2012Date of Patent: June 9, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Ryuta Sasaki, Kenichi Kishimoto
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Patent number: 9000708Abstract: To provide a motor control circuit that variably controls the speed of a motor, in which an appropriate control gain corresponding to the speed of the motor that is set can be automatically set. The motor control circuit includes a period error signal output means, a speed error signal output means and a gain correction means.Type: GrantFiled: December 8, 2011Date of Patent: April 7, 2015Assignees: Minebea Co., Ltd., Panasonic CorporationInventors: Tomohiro Inoue, Kenichi Kishimoto, Yuji Hamada
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Patent number: 8917041Abstract: A phase-shift detection circuit detects a phase shift in motor driving, using pulse-shaped position detection signal Rd and measurement signal Ms. The position detection signal is based on sensor signal Hs from a position sensor disposed in a motor. The measurement signal is based on the induced voltage from windings. The phase-shift detection circuit includes a level difference calculator and a phase-shift calculator. The level difference calculator calculates a level difference between the level of measurement signal Ms at a rising timing of position detection signal Rd and the level of measurement signal Ms at a falling timing thereof. The phase-shift calculator calculates the amount of phase shifts based on the level difference.Type: GrantFiled: June 30, 2011Date of Patent: December 23, 2014Assignee: Panasonic CorporationInventors: Kenichi Kishimoto, Mineaki Isoda, Daisuke Sato, Ryuta Sasaki
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Publication number: 20140312812Abstract: An electric motor control device includes a current vector controller that follows a target command value for controlling an electric current of the motor by separating the current into a d-axis current and q-axis current orthogonal to each other. The motor control device further includes a driver for driving the motor, a phase-angle generator a phase-angle command generator for generating a phase-angle command ?* based on difference ?v* between an absolute value |v*| of a voltage command supplied from the current vector controller to the driver and a given reference value V1mt, a d-axis current command generator for generating d-axis current command id* based on a sine value of the phase-angle command ?*, and a q-axis current limiter for setting a limit value of q-axis current command iq* based on a cosine value of the phase-angle command ?*.Type: ApplicationFiled: December 3, 2012Publication date: October 23, 2014Applicant: Panasonic CorporationInventors: Ryuta Sasaki, Kenichi Kishimoto
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Publication number: 20140152207Abstract: A motor control device according to the present invention includes a motor driving unit for driving a motor, a current vector controller, a magnetic-flux weakening current command generator, and one of a target command limiter and a q-axis current command limiter. The current vector controller controls a current of the motor by separating the current into a d-axis current and a q-axis current orthogonal to each other, in accordance with a target command value from the outside. The magnetic-flux weakening current command generator generates a d-axis current command to control the amount of the d-axis current, based on one of differences, i.e. a difference between a first predetermined reference value and the absolute value of a voltage command from the current vector controller to the motor driving unit and a difference between a second predetermined reference value and a q-axis component of the voltage command.Type: ApplicationFiled: July 25, 2012Publication date: June 5, 2014Applicant: PANASONIC CORPORATIONInventors: Ryuta Sasaki, Kenichi Kishimoto
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Publication number: 20130257338Abstract: To provide a motor control circuit that variably controls the speed of a motor, in which an appropriate control gain corresponding to the speed of the motor that is set can be automatically set. The motor control circuit includes a period error signal output means, a speed error signal output means and a gain correction means.Type: ApplicationFiled: December 8, 2011Publication date: October 3, 2013Applicants: PANASONIC CORPORATION, MINEBEA CO., LTD.Inventors: Tomohiro Inoue, Kenichi Kishimoto, Yuji Hamada
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Patent number: 8497642Abstract: A motor device comprising a motor, and a drive control circuit for driving and controlling the motor, in which the drive control circuit includes a control unit for generating a control signal for controlling the rotation of the motor, a drive unit for driving the motor on the basis of the control signal, and a communication unit for making serial communications via a serial communication bus for transmitting serial data. This communication unit has an address generating function for generating and setting addresses.Type: GrantFiled: April 6, 2009Date of Patent: July 30, 2013Assignee: Panasonic CorporationInventors: Masahiro Yasohara, Tomohiro Inoue, Kenji Sugiura, Toru Tazawa, Kenichi Kishimoto
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Patent number: 8466643Abstract: A motor drive device includes a drive controller for generating drive signal “trq”, a limiter for limiting a value of drive signal “trq” within a range, a limit value generator for generating limit value “lmt”, and a drive output section for generating an energizing signal in response to an output signal from the limiter. The limit value generator generates a comparison signal by adding offset value “ofs” to drive signal “trq” and updates limit value “lmt” based on a size relation between a value (trq+ofs) of the comparison signal and limit value “lmt”.Type: GrantFiled: June 8, 2011Date of Patent: June 18, 2013Assignee: Panasonic CorporationInventor: Kenichi Kishimoto
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Publication number: 20130113400Abstract: A phase-shift detection circuit detects a phase shift in motor driving, using pulse-shaped position detection signal Rd and measurement signal Ms. The position detection signal is based on sensor signal Hs from a position sensor disposed in a motor. The measurement signal is based on the induced voltage from windings. The phase-shift detection circuit includes a level difference calculator and a phase-shift calculator. The level difference calculator calculates a level difference between the level of measurement signal Ms at a rising timing of position detection signal Rd and the level of measurement signal Ms at a falling timing thereof. The phase-shift calculator calculates the amount of phase shifts based on the level difference.Type: ApplicationFiled: June 30, 2011Publication date: May 9, 2013Applicant: PANASONIC CORPORATIONInventors: Kenichi Kishimoto, Mineaki Isoda, Daisuke Sato, Ryuta Sasaki
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Patent number: 8410741Abstract: A servo motor control apparatus has a feedback loop. When an oscillation detection signal indicates no detection of oscillation, a parameter operating section gives an updating section an operational instruction to set a control parameter in accordance with a supplied set value. When the oscillation detection signal indicates detection of oscillation, the parameter operating section gives the updating section an operational instruction to set such a control parameter as to narrow a frequency band width of the feedback loop.Type: GrantFiled: June 14, 2012Date of Patent: April 2, 2013Assignee: Panasonic CorporationInventors: Kenichi Kishimoto, Tooru Tazawa
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Publication number: 20130076284Abstract: A motor drive device includes a drive controller for generating drive signal “trq”, a limiter for limiting a value of drive signal “trq” within a range, a limit value generator for generating limit value “lmt”, and a drive output section for generating an energizing signal in response to an output signal from the limiter. The limit value generator generates a comparison signal by adding offset value “ofs” to drive signal “trq” and updates limit value “lmt” based on a size relation between a value (trq+ofs) of the comparison signal and limit value “lmt”.Type: ApplicationFiled: June 8, 2011Publication date: March 28, 2013Applicant: PANASONIC CORPORATIONInventor: Kenichi Kishimoto
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Publication number: 20120268054Abstract: A servo motor control apparatus has a feedback loop. When an oscillation detection signal indicates no detection of oscillation, a parameter operating section gives an updating section an operational instruction to set a control parameter in accordance with a supplied set value. When the oscillation detection signal indicates detection of oscillation, the parameter operating section gives the updating section an operational instruction to set such a control parameter as to narrow a frequency band width of the feedback loop.Type: ApplicationFiled: June 14, 2012Publication date: October 25, 2012Applicant: Panasonic CorporationInventors: Kenichi Kishimoto, Tooru Tazawa
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Patent number: 8222853Abstract: A servo motor control apparatus having a feedback loop includes: an oscillation detecting section, which detects oscillation of the feedback loop, to output an oscillation detection signal; a parameter operating section, which gives an operational instruction to set a control parameter in the feedback loop based upon the oscillation detection signal; and an updating section, which is supplied with a set value for setting a control parameter, and sets the control parameter in the feedback loop while making an update thereon in accordance with the operational instruction given by the parameter operating section, wherein when the oscillation detection signal indicates no detection of oscillation, the parameter operating section gives the updating section an operational instruction to set a control parameter in accordance with the supplied set value, and when the oscillation detection signal indicates detection of oscillation, parameter operating section gives the updating section an operational instruction to seType: GrantFiled: January 11, 2008Date of Patent: July 17, 2012Assignee: Panasonic CorporationInventors: Kenichi Kishimoto, Tooru Tazawa
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Publication number: 20110031906Abstract: A motor driving device according to the present invention includes: a serial communication unit that conducts communication through a serial communication bus, the serial communication bus including a serial data line through which serial data is transmitted and a clock line through which a clock signal is transmitted; and a drive control unit that controls a driving operation of a motor. The motor driving device is configured such that a clock signal received from the serial communication bus is used as a reference clock signal of the drive control unit.Type: ApplicationFiled: March 10, 2009Publication date: February 10, 2011Applicant: Panasonic CorporationInventors: Masahiro Yasohara, Tomohiro Inoue, Kenji Sugiura, Toru Tazawa, Kenichi Kishimoto
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Publication number: 20110029137Abstract: A motor device comprising a motor, and a drive control circuit for driving and controlling the motor, in which the drive control circuit includes a control unit for generating a control signal for controlling the rotation of the motor, a drive unit for driving the motor on the basis of the control signal, and a communication unit for making serial communications via a serial communication bus for transmitting serial data. This communication unit has an address generating function for generating and setting addresses.Type: ApplicationFiled: April 6, 2009Publication date: February 3, 2011Applicant: Panasonic CorporationInventors: Masahiro Yasohara, Tomohiro Inoue, Kenji Sugiura, Toru Tazawa, Kenichi Kishimoto
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Publication number: 20100052593Abstract: A servo motor control apparatus having a feedback loop includes: an oscillation detecting section, which detects oscillation of the feedback loop, to output an oscillation detection signal; a parameter operating section, which gives an operational instruction to set a control parameter in the feedback loop based upon the oscillation detection signal; and an updating section, which is supplied with a set value for setting a control parameter, and sets the control parameter in the feedback loop while making an update thereon in accordance with the operational instruction given by the parameter operating section, wherein when the oscillation detection signal indicates no detection of oscillation, the parameter operating section gives the updating section an operational instruction to set a control parameter in accordance with the supplied set value, and when the oscillation detection signal indicates detection of oscillation, parameter operating section gives the updating section an operational instruction to seType: ApplicationFiled: January 11, 2008Publication date: March 4, 2010Applicant: Panasonic CorporationInventors: Kenichi Kishimoto, Tooru Tazawa