公开(公告)号：US20210107745A1

公开(公告)日：2021-04-15

申请号：US17066671

申请日：2020-10-09

Applicant: SEMES CO., LTD.

Inventor： Jun Beom LEE ,  Yeong Jae CHOE ,  Dong Hoon YANG ,  Jeong Eun KIM

IPC: B65G43/02 ,  B65G1/04

Abstract: A method and a device for controlling an OHT vehicle are proposed. The method and device presents a solution in which it is possible to minimize a repetition of start and stop of a vehicle, due to congestion on a track, by providing a buffer distance or a buffer waiting time, when the control target vehicle starts due to moving out of range of a proximity distance to a preceding vehicle, after stopping according to reaching of the proximity distance to the preceding vehicle, during driving the OHT control target vehicle.

公开(公告)号：US20220199441A1

公开(公告)日：2022-06-23

申请号：US17553822

申请日：2021-12-17

Applicant: SEMES CO., LTD.

Inventor： Jun Beom LEE ,  In Sung CHOI

IPC: H01L21/677 ,  B66C13/06 ,  H03H17/06

Abstract: Proposed is a transport vehicle including a traveling unit being moved along a first direction, a slide unit being driven for sliding in a second direction vertical to the first direction, a hand unit ascending and descending by a hoist combined with the slide unit and gripping the goods, and a control unit controlling driving of the traveling unit for traveling or driving of the slide unit for sliding, wherein the control unit applies a filter signal to an initial slide control signal for driving for sliding and controls driving of the hand unit for sliding through a drive control signal for sliding to which the filter signal is applied, and the filter signal includes a plurality of impulse signals and an interval between the impulse signals is determined as a value corresponding to a length of the hoist in linear interpolation on pre-stored period values on a per-hoist-length basis.

公开(公告)号：US20220388780A1

公开(公告)日：2022-12-08

申请号：US17834137

申请日：2022-06-07

Applicant: SEMES CO., LTD.

Inventor： In Sung CHOI ,  Jun Beom LEE ,  Dong Hoon YANG

IPC: B65G17/20 ,  B65G43/00

Abstract: The present invention provides a transferring unit traveling on a rail provided along a ceiling, the transferring unit including: a body provided with a traveling driver; traveling wheel rotated by receiving power from the traveling driver; a grip member configured to grip an article; a lifting member provided between the body and the grip member and configured to move the grip member in a vertical direction; and a controller, in which the controller lowers or raises the grip member while the transferring unit travels on the rail, in which the controller controls the lifting member and the traveling driver so that the lowering or raising of the grip member is performed in a constant speed section in which the transferring unit travels at a constant speed.

公开(公告)号：US20230327595A1

公开(公告)日：2023-10-12

申请号：US18091372

申请日：2022-12-30

Applicant: SEMES CO., LTD.

Inventor： Jun Beom LEE ,  Yeong Jae CHOE ,  Dong Hoon YANG ,  Byung Kwon LEE

IPC: H02P23/14 ,  H01L21/677 ,  B65G43/02

CPC classification number: H02P23/14 ,  B65G43/02 ,  H01L21/6773 ,  H01L21/67733

Abstract: Provided is a transport system to minimize an interference between motors of a transport vehicle. The transport system comprises: a first motor controller corresponding to a first wheel and configured to generate a first current value; a first motor system configured to move based on the first current value and provide a first position value according to the movement; a disturbance observer configured to receive the first current value and the first position value and calculate a first disturbance value affecting the first motor system; a second motor controller corresponding to a second wheel and configured to generate a second current value; a compensation current generator configured to generate a second compensation current value based on the second current value and the first disturbance value; and a second motor system configured to move by the second compensation current value and provide a second position value according to the movement.

公开(公告)号：US20230159312A1

公开(公告)日：2023-05-25

申请号：US17985854

申请日：2022-11-13

Applicant: SEMES CO., LTD.

Inventor： Jun Beom LEE ,  Dong Hoon YANG

IPC: B66F9/07 ,  B65G1/04

CPC classification number: B66F9/072 ,  B65G1/0421

Abstract: Proposed are an OHT vehicle and a method of controlling the operation of the same. More particularly, proposed is a technology in which when a steering change is not performed properly as a steering wheel is adhered to a damper during the operation of a steering unit of an OHT vehicle, a dithering motion function is applied to the steering wheel to enable an efficient steering change of the OHT vehicle.

公开(公告)号：US20220126699A1

公开(公告)日：2022-04-28

申请号：US17511334

申请日：2021-10-26

Applicant: SEMES CO., LTD.

Inventor： Jun Beom LEE ,  Dong Hoon YANG

IPC: B60L15/00 ,  B60L15/20

Abstract: An apparatus for controlling driving of a transport vehicle in a goods transport system includes a processing unit providing information on a movement path of the transport vehicle, a motion controller generating a drive signal including front- and rear-wheel torque signals for driving front and rear wheels, respectively, of the transport vehicle, a front-wheel torque controller controlling rotation torque of the front wheel on the basis of the front-wheel torque signal, and a rear-wheel torque controller controlling rotation torque of the rear wheel on the basis of the rear-wheel torque signal. The motion controller includes a position controller generating a positional signal determining a position of the transport vehicle, a speed controller generating a speed signal determining a speed of the transport vehicle, and a torque distributor generating the front- and rear-wheel torque signals.

公开(公告)号：US20210167716A1

公开(公告)日：2021-06-03

申请号：US16952821

申请日：2020-11-19

Applicant: SEMES CO., LTD.

Inventor： Jun Beom LEE ,  Yeong Jae CHOI

IPC: H02P29/028 ,  H02P23/20

Abstract: An apparatus includes a servo motor being configured to drive a traveling part for transferring an object along a traveling rail, a servo driver being configured to control an operation of the servo motor with adjusting a torque of the servo motor according to a load level, an overload determination unit being configured to check a degree of overload of the servo driver and a motion controller being configured to generate a speed signal and a speed profile according to a transfer command which a control unit of controlling an operation of the traveling part transmits thereto, the motion controller generating either a normal speed profile when the servo driver is not at an overload state or a corrected speed profile when the servo driver is at the overload state, and transmitting the speed signal and the speed profile to the servo driver.