Soon Woo
Soon Woo Choi, Gyeonggi-Do KR
Patent application number | Description | Published |
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20090241289 | HINGE APPARATUS HAVING AUTOMATIC RETURN FUNCTION FOR USE IN BUILDING MATERIALS - A hinge apparatus having an automatic return function for building materials is provided, in which a return spring is removed to thereby offer a closing force of each door with only a torsion spring. The hinge apparatus includes an upper body; a lower body; a shaft whose lower end portion is rotatably installed in the lower body; a piston whose outer circumference is slidably installed along the inner surface of the lower body”, a rotational/linear motion converter which converts a rotational motion of the shaft into an axial linear motion of the piston according to rotation of the door; a damping unit which provides a damping function selectively where the piston ascends according to return of the door; a torsion spring which rotates the shaft in the direction returning the door at the closing time; and a clutch unit for stopping an increment of an elastic force due to reverse twisting of the spring where an opening angle reaches a clutch stop start angle, or for restoring the elastic force of the spring. | 10-01-2009 |
Soon Woo Kwon, Yongin KR
Patent application number | Description | Published |
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20110025241 | SENSORLESS CONTROL METHOD OF HIGH PERFORMANCE PERMANENT MAGNET SYNCHRONOUS MOTOR DURING EMERGENCY OPERATION - The present invention provides a position sensorless control method of a high performance permanent magnet synchronous motor during emergency operation, which can accurately detect a magnetic pole position of the synchronous motor based on a position sensorless vector control using an adaptive observer configured based on a permanent magnet synchronous motor model. | 02-03-2011 |
20120150384 | METHOD FOR CONTROLLING CREEP TORQUE OF A VEHICLE - The present invention provides a technique for controlling creep torque to prevent a vehicle from rolling backward on an upward slope. In particular, a gradient of a road is calculated in real time from a detection value of a sensor and vehicle acceleration. A maximum creep torque for preventing roll-back caused by gravity according to the gradient is calculated using the gradient and vehicle information. A first creep torque reference is calculated based on the maximum creep torque and the vehicle speed. A second creep torque reference is calculated based on the maximum creep torque and the vehicle acceleration. A torque command value according to an operation state of a brake is calculated based on the first creep torque reference value and the second creep torque reference value and the gradient. In response, a torque output of a driving motor is controlled according to the calculated torque command value. | 06-14-2012 |
20140015457 | SYSTEM AND METHOD FOR CALIBRATING OFFSET OF MOTOR RESOLVER - Provided is a system and method for calibrating an offset of a resolver in a motor of a vehicle. More specifically, a current is applied to the −d-axis of the motor, the Vq, Vd, Iq, and Id of the motor is measured and a power input to the motor is calculated by a controller, and when the input power is not within a predetermined range, the controller adjusts the offset of the resolver to a positive or negative value accordingly. | 01-16-2014 |
Soon Woo Lee, Suwon-Si KR
Patent application number | Description | Published |
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20110051608 | WIRELESS LOCATION DETERMINATION SYSTEM AND METHOD - Disclosed herein is a wireless location determination system and method. | 03-03-2011 |
20130241774 | WIRELESS POSITIONING SERVER USING CLOCK OFFSET CALIBRATION AND WIRELESS POSITIONING METHOD USING THE SAME - A wireless positioning server using clock offset compensation and a wireless positioning method using the same. The wireless positioning server using clock offset compensation estimates a precise position of a tag requiring position information by effectively predicting information regarding a distance between a beacon for performing positioning and the tag requiring position information. An error in the positioning estimation result due to a clock offset is minimized by measuring a relative clock frequency ratio between beacons and by compensating for clock frequencies of the beacons when a distance between a beacon and a tag is estimated. | 09-19-2013 |