Patents by Inventor Masato Uwatoko

Masato Uwatoko 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).

  • Motor control device with a correcting unit determining a corrected rotation angle after a predetermined time from a detection time, control program therefor, and method for the control
    Patent number: 8674632
    Abstract: A motor control device determines a rotation angle and an angular speed of a motor, and has: a correcting unit including N number (N is an positive integer equal to or more than 2) of bit-shift circuits, which divide the angular speed by powers of 2 by bit shift, and a circuit, which subtracts output values of the second to Nth bit-shift circuits from an output value of the first bit-shift circuit to determine a correction amount for the rotation angle and correct the rotation angle by the correction amount; so as to determine two-phase direct voltages to obtain a target torque from the three-phase alternate currents passing through the motor according to the angular speed, and convert the two-phase direct voltages into the three-phase alternate voltages according to the sine, cosine of the corrected rotation angle.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: March 18, 2014
    Assignee: Spansion LLP
    Inventors: Youji Kawano, Masato Uwatoko, Motoki Shimozono, Kazuhiro Konomoto, Hiroshi Haibara, Koji Mizumoto
  • MOTOR CONTROL DEVICE, CONTROL PROGRAM THEREFOR, AND METHOD FOR THE CONTROL
    Publication number: 20120217910
    Abstract: A motor control device determines a rotation angle and an angular speed of a motor, and has: a correcting unit including N number (N is an positive integer equal to or more than 2) of bit-shift circuits, which divide the angular speed by powers of 2 by bit shift, and a circuit, which subtracts output values of the second to Nth bit-shift circuits from an output value of the first bit-shift circuit to determine a correction amount for the rotation angle and correct the rotation angle by the correction amount; so as to determine two-phase direct voltages to obtain a target torque from the three-phase alternate currents passing through the motor according to the angular speed, and convert the two-phase direct voltages into the three-phase alternate voltages according to the sine, cosine of the corrected rotation angle.
    Type: Application
    Filed: February 13, 2012
    Publication date: August 30, 2012
    Applicant: FUJITSU SEMICONDUCTOR LIMITED
    Inventors: Youji Kawano, Masato Uwatoko, Motoki Shimozono, Kazuhiro Konomoto, Hiroshi Haibara, Koji Mizumoto