公开(公告)号：US12027930B2

公开(公告)日：2024-07-02

申请号：US17299161

申请日：2019-12-17

Applicant: DENSO CORPORATION

Inventor： Shota Fujii ,  Tomoki Yamashita ,  Naoki Matsumoto ,  Ryosuke Oguri

IPC: H02K23/66 ,  H02K1/10 ,  H02K1/2791 ,  H02K13/10 ,  H02P7/00 ,  H02P7/06

CPC classification number: H02K23/66 ,  H02K1/10 ,  H02K1/2791 ,  H02K13/10 ,  H02P7/0094 ,  H02P7/06 ,  H02K2213/03

Abstract: A DC motor is configured so that, while either one of a pair of power feeding brushes makes contact with two commutator segments, the other makes contact with only one of two commutator segments. The DC motor is further provided with: a plurality of coils; a filter unit; and a calculation unit. The number of turns of a predetermined coil among the plurality of coils is different from the numbers of turns of the other coils. The filter unit allows the passing of the waveform of current generated on the basis of the fact that the numbers of turns are different from each other, and interrupts the waveform of current generated at the switching of the states of the contacts of the power feeding brushes to the commutator segments. The calculation unit calculates a rotational speed from the waveform passed through the filter unit.

公开(公告)号：US11047433B2

公开(公告)日：2021-06-29

申请号：US16471959

申请日：2018-03-09

Applicant: DENSO CORPORATION

Inventor： Ryosuke Oguri ,  Shusuke Kijima ,  Tetsuya Honda ,  Yoshio Aoki ,  Hiroyuki Okada ,  Kenta Suzuki ,  Nakatsune Shirai ,  Daisuke Sawamoto ,  Tomoaki Ozaki

IPC: F16D15/00 ,  F16D41/08 ,  H02K23/68 ,  E05F15/697

Abstract: This clutch includes an annular clutch housing, a rotationally driven drive-side rotating body, a driven-side rotating body, a rolling body, and a support member. The clutch is configured such that, when the drive-side rotating body starts to rotate when driven, the drive-side rotating body comes into contact with the support member in a rotational direction and presses the rolling body in the rotational direction through the support member, thereby releasing the rolling body from gripping effected by the clutch housing and the driven-side rotating body. The support member includes a load generation section for generating a load which makes it difficult for the support member to rotate about the rotation axis of the drive-side rotating body when at least the drive-side rotating body starts to rotate when driven.