公开(公告)号：US20200247465A1

公开(公告)日：2020-08-06

申请号：US16857503

申请日：2020-04-24

Applicant: DENSO CORPORATION

Inventor： Koichi NAKAMURA ,  Nobuyori NAKAJIMA ,  Masaya TAKI

IPC: B62D5/04 ,  H02P25/22 ,  H02P27/06

Abstract: A motor control device is provided with a plurality of power converters and a plurality of microcomputers, and controls driving of a motor that has a plurality of sets of windings. The microcomputers perform initial check of components in respective circuits after activation. The microcomputers prohibit driving of the motor by a circuit determined to be abnormal during the initial inspection. When two or more circuits are determined to be normal in the initial check, the microcomputers start driving of the motor by synchronizing the timing between the two or more circuits determined to be normal. When only one circuit is determined to be normal in the initial check, the microcomputers start driving of the motor by the one circuit determined to be normal.

公开(公告)号：US20200039579A1

公开(公告)日：2020-02-06

申请号：US16530091

申请日：2019-08-02

Applicant: DENSO CORPORATION

Inventor： Toshihiro FUJITA ,  Nobuyori NAKAJIMA ,  Masaya TAKI ,  Takahiro SUZUKI

IPC: B62D5/04 ,  B62D15/02 ,  G01D5/14 ,  G01D5/16 ,  G01D18/00

Abstract: An ECU includes plural sensor units and plural control units. The sensor units include magnetic field detection elements for detecting a rotation of a motor, and output mechanical angles related to the rotation angle in one rotation and count values related to the number of rotations of the motor, respectively. One rotation of the motor is divided into indefinite regions, in which detection deviation of the count values may occur, and definite regions, in which no detection deviation occurs. The definite region of the count value is set to deviate from the definite region of the other count value. Absolute angle calculation units calculate the absolute angles using the count values of the definite regions.

公开(公告)号：US20190291775A1

公开(公告)日：2019-09-26

申请号：US16298224

申请日：2019-03-11

Applicant: DENSO CORPORATION

Inventor： Masaya TAKI ,  Toshihiro FUJITA ,  Shuji KURAMITSU ,  Koichi NAKAMURA ,  Toshimitsu SAKAI

IPC: B62D5/04

Abstract: An ECU, which is a signal control apparatus, has a plurality of control units, which control one same motor. Steering angle calculation units acquire sensor signals from the angle sensors provided corresponding to the steering angle calculation units, respectively, and calculate the steering angles in correspondence to the sensor signals. The angle FB units perform the angle FB control based on the angle differences, which are between the target angle and the steering angle and between the target angle and the steering angle, respectively. In the angular FB unit of at least one of the control units, the angular feedback control is performed using the angle difference, which is subjected to the correction processing to reduce the error between the detection angle of the own system and the detection angle of the other system calculated by the steering angle calculation unit of the other control unit.

公开(公告)号：US20190260324A1

公开(公告)日：2019-08-22

申请号：US16405049

申请日：2019-05-07

Applicant: DENSO CORPORATION

Inventor： Shuji KURAMITSU ,  Koichi NAKAMURA ,  Atsuko OKA ,  Masaya TAKI ,  Hideki KABUNE ,  Yuki WATANABE ,  Toshimitsu SAKAI ,  Yosuke OGI

IPC: H02P25/22 ,  H02P27/08 ,  H02P21/22 ,  B62D5/04

Abstract: A rotary electric device control device controls driving of a rotary electric device including a plurality of winding sets. The rotary electric device control device includes: a plurality of drive circuits; and a plurality of control units. The control units include signal output units for outputting control signals to the drive circuits corresponding to the control units, respectively, and communicate with each other. The control units include: one master control unit; and at least one slave control unit. An electric power steering device includes: a rotary electric device control device; the rotary electric device that outputs an assist torque for assisting a steering operation of a steering wheel by a driver; and a power transmission unit that transmits a driving force of the rotary electric device to a drive target.

公开(公告)号：US20190256130A1

公开(公告)日：2019-08-22

申请号：US16405129

申请日：2019-05-07

Applicant: DENSO CORPORATION

Inventor： Shuji KURAMITSU ,  Koichi NAKAMURA ,  Atsuko OKA ,  Masaya TAKI ,  Hideki KABUNE

IPC: B62D5/04 ,  B62D6/00 ,  H02P25/22 ,  H02P27/06 ,  B62D5/00

Abstract: A rotary electric device control device for controlling driving of a rotary electric device including a plurality of winding sets, includes: a plurality of drive circuits; and a plurality of control units that include signal output units for outputting control signals to the drive circuits corresponding to the control units, respectively. The one of the control units generates a control signal according to a command value calculated by each system, a host system detection value relating to a detection value of a host system, and another system detection value relating to another detection value of another system. An electric power steering device includes: the rotary electric device control device; the rotary electric device that outputs an assist torque for assisting a steering operation of a steering wheel by a driver; and a power transmission unit that transmits a driving force of the rotary electric device to a drive target.

公开(公告)号：US20190152524A1

公开(公告)日：2019-05-23

申请号：US16091247

申请日：2017-04-06

Applicant: DENSO CORPORATION

Inventor： Toshihiro FUJITA ,  Katsuhiko HAYASHI ,  Takaharu KOZAWA ,  Shuhei MIYACHI ,  Koichi NAKAMURA ,  Yuki WATANABE ,  Atsuko OKA ,  Shuji KURAMITSU ,  Toshimitsu SAKAI ,  Masaya TAKI

IPC: B62D15/02 ,  B62D5/04 ,  G01D5/14

Abstract: In a rotation detecting apparatus, each of first and second sensor elements measures rotation of a detection target. A circuit module includes first and second rotational angle calculators each calculating, based on a corresponding one of a first measurement value of the first sensor element and a second measurement value of the second sensor element, a rotational angle of the detection target. The circuit module includes first and second rotation number calculators each calculating, based on the corresponding one of the first measurement value and the second measurement value, a rotation number of the detection target. The circuit module includes first and second communicators each outputting, to a controller, a rotational angle signal based on the rotational angle and a rotation number signal based on the rotation number. A package packages the first and second sensor elements, and is mounted to a circuit board separately from the controller.

公开(公告)号：US20190006979A1

公开(公告)日：2019-01-03

申请号：US16021563

申请日：2018-06-28

Applicant: DENSO CORPORATION

Inventor： Takashi SUZUKI ,  Daisuke KOBAYASHI ,  Masaya TAKI

IPC: H02P29/024 ,  H02P27/12 ,  H02P21/22 ,  B62D5/04

Abstract: A current sensor state determination device determines that an abnormality is caused in a current sensor when a sum of phase currents based on current detection values from each of the current sensors in three phases is greater than a first determination value, and determines that no abnormality is caused in the current sensor when the sum of phase currents is equal to or less than the first determination value. The state determination device determines that the current sensor is normal when it is determined that (i) no abnormality is caused in a preset electric angle range equal to or less than one electric-angle cycle of the rotating electric machine and (ii) a value of an electric current flowing in the rotating electric machine in a rotating coordinates system calculated based on the current detection value is equal to or greater than a second determination value.