公开(公告)号：US20170152942A1

公开(公告)日：2017-06-01

申请号：US15351835

申请日：2016-11-15

Applicant: DENSO CORPORATION

Inventor： Takanori MAKINO

IPC: F16H61/32 ,  H02K1/14 ,  H02K11/30 ,  H02K1/24

CPC classification number: F16H61/32 ,  F16H2061/326 ,  H02K1/02 ,  H02K1/146 ,  H02K1/24 ,  H02K1/246 ,  H02K11/25 ,  H02K11/30 ,  H02K2213/09

Abstract: A stator is equipped in a housing. A coil is equipped to the stator to produce a magnetic flux when supplied with an electricity. A rotor is formed of a magnetic material and is rotational in the stator. The rotor includes a rotor core, a salient pole, and an accommodation cavity portion. The salient pole is projected from the rotor core toward the stator. The accommodation cavity portion extends in the salient pole along the thickness direction. An expansive member is formed of a magnetic material, which has a thermal expansion coefficient different from a thermal expansion coefficient of the rotor. The expansive member is equipped in the accommodation cavity portion. The expansive member expands in response to increase in a temperature.

公开(公告)号：US20200332889A1

公开(公告)日：2020-10-22

申请号：US16841808

申请日：2020-04-07

Applicant: DENSO CORPORATION

Inventor： Takanori MAKINO ,  Hiroyuki KADO ,  Mikine KUME

IPC: F16H61/32 ,  G01D5/245 ,  H02K11/215 ,  H02K7/116 ,  H02K7/00

Abstract: An actuator includes an electric motor; a plurality of electronic components, which control an operation of the electric motor; a control circuit board, to which the plurality of electronic components are installed; position sensors, which are installed to the control circuit board; and a plurality of displacement limiting supports. The motor position sensors are configured to sense a rotational position of a rotor and a motor shaft of the electric motor. One of the displacement limiting supports is installed along an entire of a perimeter around the motor position sensors. Another one of the displacement limiting supports is installed at a part of a perimeter around a corresponding specific one of the electronic components. The displacement limiting supports support the control circuit board such that the displacement limiting supports limit displacement of the control circuit board.