公开(公告)号：US10378922B2

公开(公告)日：2019-08-13

申请号：US15544612

申请日：2016-01-13

Applicant: DENSO CORPORATION

Inventor： Takuya Kawamura ,  Hirofumi Kinjou ,  Toru Wakimoto ,  Hideaki Nakayama ,  Masataka Yoshimura

IPC: G01D5/14 ,  G01D5/244

Abstract: A rotation angle detection apparatus includes a magnet that is provided to a rotating shaft of a rotating body and rotates with the rotating shaft to generate magnetic flux and a magnetic sensor that is provided at a distance from the magnet and detects a magnetic flux interlinked with the magnetic sensor. The rotation angle detection apparatus has a magnet magnetic flux detection circuit that detects a magnet magnetic flux generated from the magnet, a disturbance magnetic flux detection circuit that detects a disturbance magnetic flux, which is a magnetic flux other than the magnet magnetic flux and is interlinked with the magnetic sensor, and a correction circuit that corrects a result of detection of the magnetic sensor based on a result of detection of the magnet magnetic flux detection circuit and a result of detection of the disturbance magnetic flux detection circuit.

公开(公告)号：US10006784B2

公开(公告)日：2018-06-26

申请号：US15061297

申请日：2016-03-04

Applicant: DENSO CORPORATION

Inventor： Takuya Kawamura ,  Hirofumi Kinjou ,  Toru Wakimoto ,  Hideaki Nakayama ,  Masataka Yoshimura

IPC: G01B7/00 ,  G01R33/025 ,  G01D5/14 ,  G01D3/036

CPC classification number: G01D5/145 ,  G01D3/0365 ,  G01D5/24485

Abstract: A correction circuit stores data for obtaining coefficients of a relational expression indicating a relationship between a disturbance magnetic flux and a rotational angle error. Then, the coefficients are obtained from the data for obtaining the coefficients, and a detection result of a magnetic sensor is corrected based on the coefficients obtained, a relational expression, and a detection result of a disturbance magnetic flux detection circuit. Since it is possible to obtain the rotational angle error with respect to the disturbance magnetic flux from the coefficient obtained and the relational expression, it is not necessary to store the data indicating the relationship between the disturbance magnetic flux and the rotational angle error for all of the disturbance magnetic flux value in disturbance magnetic flux regions that may be applied.

公开(公告)号：US11171591B2

公开(公告)日：2021-11-09

申请号：US16838324

申请日：2020-04-02

Applicant: DENSO CORPORATION

Inventor： Akeru Ishikawa ,  Takuya Kawamura ,  Hideaki Nakayama ,  Koji Irie

IPC: H02P6/00 ,  H02P21/22 ,  H02P25/024 ,  B60L9/18 ,  H02P9/04

Abstract: A control apparatus sets a value of the field current command and a value of the armature related command in accordance with drive information and the setting information stored in the storage unit; the value of the field current command and the value of the armature related command correspond to the obtained drive information. The control apparatus controls a field current flowing through the field winding to the set value of the field current command, and controls a current flowing through the armature winding or a voltage applied to the armature winding to the set value of the armature related command.