Patents by Inventor Akira Satake
Akira Satake 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).
-
Publication number: 20170294864Abstract: A drive control apparatus for multiple-winding motor includes: a modulation rate phase command generation unit which calculates currents of first and second inverters for driving a multiple-winding three-phase motor and generates a modulation rate command and a phase command for equalizing the currents; a pulse number determination unit which determines the number of pulses per half cycle on the basis of a frequency command; a pattern table for storing switching patterns; and gate signal generators which control the first and second inverters, using an optimal switching pattern based on the number of pulses, wherein the modulation rate phase command generation unit performs control for equalizing currents of the first and second inverters, and the phase or frequency at which the control is performed is changed in accordance with any of the number of pulses, the modulation rate, the frequency command, and the switching pattern.Type: ApplicationFiled: October 15, 2014Publication date: October 12, 2017Applicant: TOSHIBA MITSUBISHI-ELECTRIC INDUSTRIAL SYSTEMS CORPORATIONInventors: Keiko TADA, Yuriko OKAMOTO, Akira SATAKE, Hiromitsu SUZUKI, Masahiko TSUKAKOSHI, Ritaka NAKAMURA, Masashi NAKAMURA
-
Publication number: 20170104431Abstract: A control device for an AC rotating machine includes: a current detection unit; a command generation unit for generating a voltage command, using a moment of inertia J; a speed estimation unit for calculating an estimated speed ?0 on the basis of the voltage command and detected current; an output torque computing unit for calculating output torque on the basis of the detected current; and an inertia moment computing unit for calculating the moment of inertia J. The output torque computing unit gives a delay characteristic corresponding to an estimation delay of the estimated speed ?0, to the output torque, and the inertia moment computing unit calculates the moment of inertia J on the basis of the estimated speed ?0 and the output torque having the delay characteristic.Type: ApplicationFiled: March 27, 2015Publication date: April 13, 2017Applicant: Mitsubishi Electric CorporationInventors: Yosuke HACHIYA, Masato ITO, Hisanori YAMASAKI, Akira SATAKE
-
Publication number: 20160084546Abstract: A heat pump apparatus, including: a two-cylinder compressor including: an electric motor; two compression units to be driven by the electric motor, the two-cylinder compressor being structured to switch between two operation modes including single operation in which one of the compression units is brought into a non-compression state, and parallel operation in which both the compression units are brought into a compression state; an inverter drive control device supplying drive power to the electric motor of the two-cylinder compressor; an operation mode detecting-determining unit determining a current operation mode based on an electric signal acquired from the inverter drive control device; and a capacity control device determining a rotating frequency of the electric motor so that a temperature of a target object is brought close to a set value, to thereby control the inverter drive control device based on a result of determination of the operation mode detecting-determining unit.Type: ApplicationFiled: May 21, 2014Publication date: March 24, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Tetsuhide YOKOYAMA, Yosuke SHINOMOTO, Shogo MOROE, Akira SATAKE, Masashi FUJITSUKA, Takeshi MORI, Taro KATO, Hideaki MAEYAMA, Keiko TADA
-
Patent number: 8750009Abstract: A controller of a power converter including an inverter that includes plural semiconductor switching elements. The controller suppresses an error between a voltage command and an inverter output voltage and responds to a voltage command at a high speed. The controller includes a voltage command generator that generates a voltage command signal and a switching pattern calculator that calculates and outputs, based on the voltage command signal, a switching pattern of a synchronous PWM system in which an average value of an inverter output voltage matches the voltage command signal.Type: GrantFiled: December 27, 2007Date of Patent: June 10, 2014Assignee: Mitsubishi Electric CorporationInventors: Shinichi Furutani, Akira Satake, Jun Sawaki
-
Patent number: 8537580Abstract: A controller that controls a switching element of an inverter using pulse width modulation is applied to a power converter including an inverter, to realize a stable change of a carrier frequency, current control responsiveness, and inverter loss suppression. The controller includes a carrier-frequency setting unit that sets a carrier frequency command used for pulse width modulation of an inverter corresponding to a current command and a current-command change rate. The carrier-frequency setting unit includes a carrier frequency map having mapped thereon information of a carrier frequency corresponding to a current command expressed in a vertical axis and a current-command change rate expressed in a lateral axis, and outputs information of a carrier frequency on the carrier frequency map corresponding to the input current command and the input current-command change rate to a switching pattern calculator.Type: GrantFiled: January 18, 2008Date of Patent: September 17, 2013Assignee: Mitsubishi Electric CorporationInventors: Shinichi Furutani, Akira Satake, Jun Sawaki
-
Patent number: 8324768Abstract: A rotational angle detection device for a permanent magnet dynamo-electric machine, including: a stator (10); a rotor (20); and a conductive circuit that includes first conductors (1a1, 1a2) extending in a direction parallel to a rotational axis of the rotor and being disposed in at least two places in a circumferential direction of the rotor, and second conductors (1b1, 1b2) for electrically interconnecting the first conductors. In this case, the first conductors are each disposed within a range of an electrical angle between ?45° and +45° in the circumferential direction with a magnetic pole center being set as a reference, and the conductive circuit is disposed in at least one place in the circumferential direction, and the rotational angle detection device further comprising a detection means for detecting a rotational angle of the rotor by measuring a value of a current flowing through the armature winding.Type: GrantFiled: January 9, 2009Date of Patent: December 4, 2012Assignee: Mitsubishi Electric CorporationInventors: Masatsugu Nakano, Akira Satake, Kanji Shinkawa, Hiroyuki Akita, Sachiko Kawasaki
-
Publication number: 20100277149Abstract: A controller that controls a switching element of an inverter using pulse width modulation is applied to a power converter including an inverter, to realize a stable change of a carrier frequency, current control responsiveness, and inverter loss suppression. The controller includes a carrier-frequency setting unit that sets a carrier frequency command used for pulse width modulation of an inverter corresponding to a current command and a current-command change rate. The carrier-frequency setting unit includes a carrier frequency map having mapped thereon information of a carrier frequency corresponding to a current command expressed in a vertical axis and a current-command change rate expressed in a lateral axis, and outputs information of a carrier frequency on the carrier frequency map corresponding to the input current command and the input current-command change rate to a switching pattern calculator.Type: ApplicationFiled: January 18, 2008Publication date: November 4, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shinichi Furutani, Akira Satake, Jun Sawaki
-
Publication number: 20100271853Abstract: A controller of a power converter including an inverter that includes plural semiconductor switching elements. The controller suppresses an error between a voltage command and an inverter output voltage and responds to a voltage command at a high speed. The controller includes a voltage command generator that generates a voltage command signal and a switching pattern calculator that calculates and outputs, based on the voltage command signal, a switching pattern of a synchronous PWM system in which an average value of an inverter output voltage matches the voltage command signal.Type: ApplicationFiled: December 27, 2007Publication date: October 28, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shinichi Furutani, Akira Satake, Jun Sawaki
-
Patent number: 7768803Abstract: A control circuit for a power converter includes a voltage command unit that generates a voltage command signal, a voltage command compensation unit that compensates the voltage command signal to generate a compensatory voltage command signal, and a switching pattern arithmetic unit that generates a switching signal for each of semiconductor switching elements of the power converter based on the compensatory voltage command signal and a carrier wave. The conversional fundamental frequency of the power converter is f and the carrier frequency of the carrier wave is fc. The voltage command compensation unit generates a compensation signal including at least one compensatory frequency component of fc?n×f (where n denotes successive positive and negative integers), and generates the compensatory voltage command signal.Type: GrantFiled: June 16, 2006Date of Patent: August 3, 2010Assignee: Mitsubishi Electric CorporationInventors: Shinichi Furutani, Akira Satake, Jun Sawaki
-
Publication number: 20090184598Abstract: A rotational angle detection device for a permanent magnet dynamo-electric machine, including: a stator (10); a rotor (20); and a conductive circuit that includes first conductors (1a1, 1a2) extending in a direction parallel to a rotational axis of the rotor and being disposed in at least two places in a circumferential direction of the rotor, and second conductors (1b1, 1b2) for electrically interconnecting the first conductors. In this case, the first conductors are each disposed within a range of an electrical angle between ?45° and +45° in the circumferential direction with a magnetic pole center being set as a reference, and the conductive circuit is disposed in at least one place in the circumferential direction, and the rotational angle detection device further comprising a detection means for detecting a rotational angle of the rotor by measuring a value of a current flowing through the armature winding.Type: ApplicationFiled: January 9, 2009Publication date: July 23, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Masatsugu NAKANO, Akira SATAKE, Kanji SHINKAWA, Hiroyuki AKITA, Sachiko KAWASAKI
-
Patent number: 7554281Abstract: A synchronous machine control apparatus which can produce a torque level as close as possible to a desired torque command level while considering limitations on an output current of a power conversion unit.Type: GrantFiled: April 27, 2005Date of Patent: June 30, 2009Assignee: Mitsubishi Electric CorporationInventors: Akira Satake, Atsuo Haishi
-
Publication number: 20090129132Abstract: A control circuit for a power converter includes a voltage command unit that generates a voltage command signal, a voltage command compensation unit that compensates the voltage command signal to generate a compensatory voltage command signal, and a switching pattern arithmetic unit that generates a switching signal for each of semiconductor switching elements of the power converter based on the compensatory voltage command signal and a carrier wave. The conversional fundamental frequency of the power converter is f and the carrier frequency of the carrier wave is fc. The voltage command compensation unit generates a compensation signal including at least one compensatory frequency component of fc?n×f (where n denotes successive positive and negative integers), and generates the compensatory voltage command signal.Type: ApplicationFiled: June 16, 2006Publication date: May 21, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shinichi Furutani, Akira Satake, Jun Sawaki
-
Publication number: 20080191656Abstract: A synchronous machine control apparatus which can produce a torque level as close as possible to a desired torque command level while considering limitations on an output current of a power conversion unit.Type: ApplicationFiled: April 27, 2005Publication date: August 14, 2008Applicant: Mitsubishi Electric CorporationInventors: Akira Satake, Atsuo Haishi
-
Publication number: 20070018605Abstract: An influence resulting from double saliency of an electric motor, i.e., an influence of a deviation of the axis of an alternating current due to a rotor magnetic pole position ? on the estimation of a magnetic pole position, is eliminated, and, in particular, the magnetic pole position of double saliency electric motor can be estimated with high precision.Type: ApplicationFiled: July 16, 2003Publication date: January 25, 2007Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Akira Satake, Yoshihiko Kinpara, Toshiyuki Kaitani
-
Patent number: 7161324Abstract: An influence resulting from double saliency of an electric motor, i.e., an influence of a deviation of the axis of an alternating current due to a rotor magnetic pole position ? on the estimation of a magnetic pole position, is eliminated, and, in particular, the magnetic pole position of a double saliency electric motor can be estimated with high precision.Type: GrantFiled: July 16, 2003Date of Patent: January 9, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akira Satake, Yoshihiko Kinpara, Toshiyuki Kaitani
-
Patent number: 7145311Abstract: A vector control device of a winding field type synchronous machine with which even when voltage changes caused by resistance voltage falls and inductance fluctuations due to armature current occur the armature voltage is controlled exactly to a desired command value and a high power supply utilization percentage is maintained at all times. An absolute value of armature voltage is calculated from an armature voltage command value or an armature voltage detected value, and the armature voltage is controlled by a flux command being regulated so that this absolute value of armature voltage approaches a desired armature voltage command value. Also, the armature voltage command value is regulated so that the loss of the synchronous machine becomes minimal with reference to the armature current and the field current.Type: GrantFiled: March 29, 2005Date of Patent: December 5, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akira Satake, Atsuo Haishi, Masaru Kobayashi
-
Patent number: 6984959Abstract: A synchronous machine control device includes a flux command generator, a magnetic flux estimator, a divider, a flux controller and ?- and ?-axis armature current controllers. The flux command generator produces a flux command from the synchronous machine turning speed. The magnetic flux estimator calculates the magnitude and phase of armature flux linkage from armature currents and field current taking into consideration magnetic fluxes produced by permanent magnets. The divider produces an armature current command by dividing a torque command by the armature flux linkage. The flux controller determines a field current command based on an error of the magnitude of the armature flux linkage from the flux command.Type: GrantFiled: January 26, 2005Date of Patent: January 10, 2006Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akira Satake, Atsuo Haishi, Masaru Kobayashi
-
Publication number: 20050212476Abstract: A vector control device of a winding field type synchronous machine with which even when voltage changes caused by resistance voltage falls and inductance fluctuations due to armature current occur the armature voltage is controlled exactly to a desired command value and a high power supply utilization percentage is maintained at all times. An absolute value of armature voltage is calculated from an armature voltage command value or an armature voltage detected value, and the armature voltage is controlled by a flux command being regulated so that this absolute value of armature voltage approaches a desired armature voltage command value. Also, the armature voltage command value is regulated so that the loss of the synchronous machine becomes minimal with reference to the armature current and the field current.Type: ApplicationFiled: March 29, 2005Publication date: September 29, 2005Inventors: Akira Satake, Atsuo Haishi, Masaru Kobayashi
-
Publication number: 20050194924Abstract: A synchronous machine control device includes a flux command generator, a magnetic flux estimator, a divider, a flux controller and ?- and ?-axis armature current controllers. The flux command generator produces a flux command from the synchronous machine turning speed. The magnetic flux estimator calculates the magnitude and phase of armature flux linkage from armature currents and field current taking into consideration magnetic fluxes produced by permanent magnets. The divider produces an armature current command by dividing a torque command by the armature flux linkage. The flux controller determines a field current command based on an error of the magnitude of the armature flux linkage from the flux command.Type: ApplicationFiled: January 26, 2005Publication date: September 8, 2005Inventors: Akira Satake, Atsuo Haishi, Masaru Kobayashi
-
Patent number: 6731095Abstract: A controller for a multiplex winding motor. When a multiplex winding motor is driven and controlled by inverters and each winding includes a current control system, the controller compensates interference between the current control systems of windings. Voltage non-interacting arithmetic sections compute a voltage command value supplied to voltage applying sections, which are connected to a set of windings, not only by using an output value of a current control section for controlling current in one winding but also using an output value of a current control section for controlling current in another winding, so that voltage interference between the current control sections is compensated.Type: GrantFiled: June 6, 2002Date of Patent: May 4, 2004Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Akira Satake, Shigeki Mizuno, Hiroshi Araki