Patents Assigned to KNR Systems Inc.
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Patent number: 11817746Abstract: The present invention relates to a rotor of motor, and more particularly, to a 2-segment quasi-Halbach rotor of motor that includes a radial magnet and a circumferential magnet which are Halbach-arrayed and a back iron providing a flux to reduce a thickness of the magnet and acquire high air-gap flux density.Type: GrantFiled: November 22, 2021Date of Patent: November 14, 2023Assignees: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATION, KNR SYSTEM, INC., EPT CO., INC.Inventors: Kwang Hee Nam, Jae Hak Kim, Sang Moo Lee, Myoung Han Kim, Bon Kil Koo
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Patent number: 10493621Abstract: Hydraulic rotary actuator disposes entry and exit lines of the hydraulic fluid within the hydraulic rotary actuator and comprises a floating member with a hollow portion, a rotating member configured to be inserted into the hollow portion, a working fluid supplied to said hollow portion, a servo control valve connected to said floating member configured to control the flow rate, an entry line connected to said servo control valve and further connecting said servo control valve to said floating member, said entry line forming a through-hole that penetrates through said floating member and forming a supply passage for said working fluid, an exit line connecting said hollow portion to said servo control valve and further thereon to outside of floating member, said exit line forming a through-hole that penetrates through said floating member and forming a discharge passage for said working fluid.Type: GrantFiled: August 11, 2017Date of Patent: December 3, 2019Assignee: KNR SYSTEMS INC.Inventors: Sung Moo Ryu, Jeong Whan Moon
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Patent number: 10180132Abstract: A flow generator includes pumps operated by motors to generate an amount of a hydraulic fluid, a proportional hydraulic control valve to control output hydraulic pressure according to the amount of the hydraulic fluid, a pressure sensor to detect the output hydraulic pressure, and a hydraulic servo loop controller to which a required hydraulic pressure and a required amount of fluid are input by a user. Based on a feedback signal representing the output hydraulic pressure, the controller generates a pressure control signal for controlling the proportional hydraulic control valve based on the required hydraulic pressure and a change in the output hydraulic pressure. It also generates an RPM input signal for controlling a motor's RPM.Type: GrantFiled: July 10, 2014Date of Patent: January 15, 2019Assignee: KNR Systems, Inc.Inventors: Sung Moo Ryu, Seong Cheol Jang, Hyoung Kwon Kim, Young Ho Choo, Dae Gyeong Kim
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Patent number: 9976577Abstract: In the integrated hydraulic rotary actuator according to the present invention, a valve, a sensor, a controller, and a driving unit for controlling the rotary actuator are integrated, so wires connecting them are not exposed to the outside. Accordingly, it is possible to prevent damage due to interference in operation and maintenance is easy. Further, since it is integrated, including a controller, when the actuator according to the present invention is used, connecting with other parts is easy and interference can be reduced. Therefore, it is easy to design and manufacture a resultant product.Type: GrantFiled: April 30, 2015Date of Patent: May 22, 2018Assignee: KNR SYSTEMS INC.Inventors: Sung Moo Ryu, Ki Tak Ahn, Gyu Young Lee
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Publication number: 20170341228Abstract: Hydraulic rotary actuator disposes entry and exit lines of the hydraulic fluid within the hydraulic rotary actuator and comprises a floating member with a hollow portion, a rotating member configured to be inserted into the hollow portion, a working fluid supplied to said hollow portion, a servo control valve connected to said floating member configured to control the flow rate, an entry line connected to said servo control valve and further connecting said servo control valve to said floating member, said entry line forming a through-hole that penetrates through said floating member and forming a supply passage for said working fluid, an exit line connecting said hollow portion to said servo control valve and further thereon to outside of floating member, said exit line forming a through-hole that penetrates through said floating member and forming a discharge passage for said working fluid.Type: ApplicationFiled: August 11, 2017Publication date: November 30, 2017Applicant: KNR Systems Inc.Inventors: Sung Moo RYU, Jeong Whan MOON
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Patent number: 9782894Abstract: Hydraulic rotary actuator disposes entry and exit lines of the hydraulic fluid within the hydraulic rotary actuator and comprises a floating member with a hollow portion, a rotating member configured to be inserted into the hollow portion, a working fluid supplied to said hollow portion, a servo control valve connected to said floating member configured to control the flow rate, an entry line connected to said servo control valve and further connecting said servo control valve to said floating member, said entry line forming a through-hole that penetrates through said floating member and forming a supply passage for said working fluid, an exit line connecting said hollow portion to said servo control valve and further thereon to outside of floating member, said exit line forming a through-hole that penetrates through said floating member and forming a discharge passage for said working fluid.Type: GrantFiled: December 6, 2014Date of Patent: October 10, 2017Assignee: KNR Systems Inc.Inventors: Sung Moo Ryu, Ki Tak Ahn, Jeong Whan Moon, Jung Yeol Kim