公开(公告)号：US20220294371A1

公开(公告)日：2022-09-15

申请号：US17828444

申请日：2022-05-31

Applicant: DENSO CORPORATION

Inventor： Daisuke YAMAMOTO ,  Seiji NAKAYAMA ,  Jun YAMADA ,  Kouji SAKAGUCHI

IPC: H02P6/24 ,  H02P6/28 ,  H02P6/16 ,  H02K11/33 ,  H02P25/08

Abstract: A motor control device controls a drive of a motor in a motor drive system including the motor and a detent mechanism. The detent mechanism has a detent member that rotates integrally with an output shaft to which the rotation of the motor is transmitted, and an engaging member that moves a valley portion by a rotation of the motor and positions the output shaft by stopping within a positioning range. The motor control device includes a positioning determination unit and an energization control unit. The positioning determination unit determines whether or not the engaging member is stopped within the positioning range based on control parameter other than a detection value of a motor rotation angle sensor that detects a motor rotation angle. When the energization control unit determines that the engaging member is stopped within the positioning range, the energization control unit turns off the energization of the motor.

公开(公告)号：US20170234424A1

公开(公告)日：2017-08-17

申请号：US15433207

申请日：2017-02-15

Applicant: DENSO CORPORATION

Inventor： Daisuke YAMAMOTO

IPC: F16H61/32 ,  G05D3/20 ,  H02P7/28 ,  F16H59/72

CPC classification number: F16H61/32 ,  F16H59/72 ,  F16H2061/283 ,  F16H2061/326 ,  G05D3/20 ,  H02P7/28 ,  H02P29/60

Abstract: When a butting control is performed at a low temperature at which an oil temperature of an automatic transmission is equal to or lower than a predetermined value, a driving condition changing process is performed. In the driving condition changing process, an execution period from a starting of the butting control to an ending of the butting control is divided into a plurality of sections on the basis of a rotation angle of a motor. By making a torque of the motor greater and a rotation speed higher in a starting-section than in an ending-section, the execution period of the butting control is made short. By making the torque of the motor smaller and the rotation speed lower in the ending-section than in the starting-section, an amount of deformation of a component is made smaller when a part of a component is butted against a limit position so that a reference position can be learned accurately.

公开(公告)号：US20200224762A1

公开(公告)日：2020-07-16

申请号：US16838116

申请日：2020-04-02

Applicant: DENSO CORPORATION

Inventor： Daisuke YAMAMOTO ,  Koji SAKAGUCHI

IPC: F16H61/12 ,  H02P6/12 ,  F16H61/32

Abstract: A shift range control device includes a drive circuit, a voltage detector, and a controller. The drive circuit includes switching elements, and is shared by a plurality of winding sets. The voltage detector detects terminal voltages of respective phases. The controller controls energization of the winding sets by controlling on and off operations of the switching elements, and controls interruption units each capable of switching between conduction and interruption of power from a power supply to a corresponding winding set. The controller performs disconnection diagnosis based on the terminal voltage during energization of the winding sets in a control state where one of the interruption units is controlled to conduct the power and a remaining interruption unit is controlled to interrupt the power.