公开(公告)号：US20210218299A1

公开(公告)日：2021-07-15

申请号：US16967379

申请日：2019-03-26

Applicant: DENSO CORPORATION

Inventor： Koji MIKAMI ,  Akihiro UTSUMI ,  Yoshiaki TAKEMOTO ,  Koji HOTTA

IPC: H02K1/27 ,  H02K21/16

Abstract: A motor includes a rotation shaft, a rotor, and a stator. The rotor includes a rotor core and magnetic pole portions respectively including permanent magnets embedded in the rotor core. The magnetic pole portions have polarities that differ alternately in a circumferential direction. A projection projecting radially outward from an outer circumferential portion of the rotor core is arranged between the magnetic pole portions having different polarities. In a radial opposing relationship of the rotor core and the teeth taken at different times while the rotor is revolved once, at a certain time, a quantity of the teeth that oppose one of the magnetic pole portions and do not oppose the projection is greater than a quantity of the teeth that simultaneously oppose two of the magnetic pole portions adjacent to each other in the circumferential direction and the projection located in between the magnetic pole portions.

公开(公告)号：US20190217819A1

公开(公告)日：2019-07-18

申请号：US16334306

申请日：2017-12-19

Applicant: DENSO CORPORATION

Inventor： Akihiro UTSUMI

IPC: B60S1/08 ,  H02P29/024 ,  H02P29/60 ,  H02P27/08

CPC classification number: B60S1/0807 ,  B60S1/0814 ,  B60S1/0818 ,  B60S1/46 ,  H02P6/15 ,  H02P27/08 ,  H02P29/027 ,  H02P29/60

Abstract: A wiper device including a wiper motor that includes a rotor and a coil to generate a rotating magnetic field, and that causes a wiper blade to perform a wiping operation by rotating the rotor according to the rotating magnetic field, a drive section that drives rotation of the wiper motor by performing current switch-on in the coil so as to generate the rotating magnetic field, and a controller that controls the drive section by a timing for current switch-on in the coil based on at least a rotation position of the rotor.

公开(公告)号：US20190184941A1

公开(公告)日：2019-06-20

申请号：US16099688

申请日：2017-05-09

Applicant: DENSO CORPORATION

Inventor： Yasuhide ITO ,  Yoshihisa BANNO ,  Akihiro UTSUMI

IPC: B60S1/08 ,  B60S1/34 ,  B60S1/46

CPC classification number: B60S1/0807 ,  B60S1/18 ,  B60S1/3418 ,  B60S1/46

Abstract: When an operation signal of a view-obstructing material removal mode switch has been detected, a controller controls such that wiping operation is performed while spraying washer fluid toward the opposite side to a movement direction side of a wiper blade, after which a wiping operation in which washer fluid is not sprayed is performed.