Patents by Inventor Seung-Suk Oh
Seung-Suk Oh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7582993Abstract: A motor having a reverse-rotation preventing unit, comprises: a casing; a stator fixedly-coupled to an inside of the casing; a primary rotor rotatably inserted into the stator; a motor shaft coupled to the primary rotor; a secondary rotor having a permanent magnet and rotatably inserted into an air gap between the stator and the primary rotor; a locking unit installed at an inner wall of the casing; a ratchet unit rotatably coupled to the secondary rotor, and locked or unlocked to/from the locking unit when the secondary rotor is forward-rotated or reverse-rotated, for rotating the secondary rotor in a forward direction; and a position setting unit for moving the ratchet unit to a locking position or a unlocking position by a difference between a centrifugal force generated when the secondary rotor is rotated and its restoration force. In the present invention, the motor is only forward-rotated without being reverse-rotated and thus a reliability thereof is enhanced.Type: GrantFiled: June 13, 2006Date of Patent: September 1, 2009Assignee: LG Electronics Inc.Inventors: Seung-Do Han, Seung-Suk Oh, Jae-Hong Ahn, Hyoun-Jeong Shin, Dong-Il Lee
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Publication number: 20090043426Abstract: An apparatus for controlling a fan motor of an air conditioner comprises: a hybrid induction motor (HIM) for discharging warm air outwardly by a control signal; a temperature detecting unit for detecting a temperature of an evaporator; and a controlling unit for comparing the temperature of the evaporator with a preset temperature, and outputting a control signal to control the HIM based on a result of the comparison.Type: ApplicationFiled: December 27, 2006Publication date: February 12, 2009Applicant: LG ELECTRONICS INC.Inventors: Seung-Suk Oh, Dong-Il Lee, Hyoun-Jeong Shin
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Patent number: 7459814Abstract: The hybrid induction motor includes a housing; a stator installed in the housing and having a stator core portion and a stator coil portion; a rotor coupling body having a rotary shaft rotatably installed in at the housing, a cage rotor portion rotating integrally with the rotary shaft, and a permanent magnet rotor portion coupled to a circumference of the cage rotor portion with a certain air gap so as to rotate freely with respect to the rotary shaft; and a reverse rotation preventing switch, when the rotary shaft rotates reversibly, coming in contact with the permanent magnet rotor portion which is moved along the shaft by thrust generated by the rotor coupling body and cutting off power being supplied to the stator coil portion.Type: GrantFiled: January 5, 2006Date of Patent: December 2, 2008Assignee: LG Electronics Inc.Inventors: Dong-Il Lee, Seung-Do Han, Hyoun-Jeong Shin, Jae-Hong Ahn, Seung-Suk Oh
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Patent number: 7459815Abstract: An induction motor having a reverse-rotation preventing function, comprises: a stator provided with a winding coil generating flux by a current; an induction rotor provided with a cage and rotatably inserted in the stator, wherein a rotary shaft is coupled to its inside; a synchronous rotor provided with a permanent magnet and rotatably coupled between the stator and the induction rotor; an induction-force generating unit generating a force for moving the synchronous rotor in an axial direction; and a rotation preventing unit preventing a reverse rotation by fixing the synchronous rotor moved by the induction-force generating unit at the time of reverse rotation of the synchronous rotor.Type: GrantFiled: January 27, 2006Date of Patent: December 2, 2008Assignee: LG Electronics Inc.Inventors: Seung-Do Han, Hyoun-Jeong Shin, Jae-Hong Ahn, Seung-Suk Oh, Dong-Il Lee
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Patent number: 7439644Abstract: A hybrid induction motor comprises a stator fixedly installed in a casing, an induction rotor rotatably inserted into a center of the stator and having a shaft at a center thereof, a first synchronous rotor installed between the stator and the induction rotor in a circumferential direction of the shaft so as to be freely rotatable, and a second synchronous rotor facing the first synchronous rotor in a longitudinal direction of the shaft and installed between the stator and the induction rotor so as to be freely rotatable.Type: GrantFiled: January 5, 2006Date of Patent: October 21, 2008Assignee: LG Electronics Inc.Inventors: Jeong-Chul Kim, Dong-Il Lee, Seung-Do Han, Hyoun-Jeong Shin, Jae-Hong Ahn, Seung-Suk Oh
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Publication number: 20070216248Abstract: A hybrid induction motor includes a motor casing; a rotational shaft rotatably coupled with the motor casing; an induction rotor rotated by being integrally coupled with the rotational shaft and having a rotor core and a conductor bar inserted in the rotor core; a stator having a hollow into which the induction rotor is inserted and installed with a certain length in a direction of the rotational shaft; a first magnetic rotor inserted between the stator and the induction rotor and coupled with the rotational shaft so as to be freely rotatable; a second magnetic rotor inserted between the stator and the induction rotor so as to be symmetrical with the first magnetic rotor and coupled with the rotational shaft so as to be freely rotatable; and a magnetic spacer inserted between the first and second magnetic rotors.Type: ApplicationFiled: December 19, 2006Publication date: September 20, 2007Applicant: LG ELECTRONICS INC.Inventors: Seung-Do HAN, Seung-Suk OH, Hyoun-Jeong SHIN
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Patent number: 7271565Abstract: An apparatus for controlling a speed of a fan motor (HIM (Hybrid Induction Motor)) of an air-conditioner extends a speed control range of a fan motor of an air-conditioner by controlling revolutions per minute (RPM) of the fan motor. In order to extend the speed control range of the HIM, an RPM of the HIM is controlled based on a pre-set duty ratio of a switching device electrically connected with the HIM.Type: GrantFiled: March 4, 2005Date of Patent: September 18, 2007Assignee: LG Electronics Inc.Inventors: Seung-Do Han, Hyoun-Jeong Shin, Seung-Suk Oh
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Publication number: 20070164699Abstract: An apparatus and method for varying a speed of a hybrid induction motor (HIM). The apparatus comprises a starting capacitor; a driving capacitor; at least one speed varying capacitor for varying a speed of a HIM by a control signal; and a controlling unit for analyzing a user's commands and outputting a control signal to vary the speed of the HIM based on a result of the analysis.Type: ApplicationFiled: December 26, 2006Publication date: July 19, 2007Applicant: LG ELECTRONICS INC.Inventors: Seung-Suk OH, Jae-Hong AHN, Hyoun-Jeong SHIN
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Publication number: 20060284509Abstract: An induction motor includes: a stator in which a plurality of winding coils wound in a central direction of a stator core are arranged; an induction rotor rotatably inserted into the stator; and a synchronous rotor including a magnet and rotatably inserted into an air gap between the stator and the induction rotor, so that the induction motor reduces the size of the whole motor and has a structure of a compact size to thereby reduce installation space and manufacturing cost and increase output power and efficiency.Type: ApplicationFiled: January 26, 2006Publication date: December 21, 2006Applicant: LG Electronics Inc.Inventors: Seung-Do Han, Seung-Suk Oh, Jae-Hong Ahn, Hyoun-Jeong Shin
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Publication number: 20060284505Abstract: An induction motor comprising a stator including main winding coils and sub winding coils wound in a stator core, respectively, the main winding coil having a volume greater than that of the sub winding coil, a primary rotor rotatably inserted in the stator, and a secondary rotor rotatably inserted in an air gap between the stator and the primary rotor, whereby counter electromotive force of the main winding coils is increased and resistance thereof is decreased, and thus an operation efficiency can be improved and starting voltage and break down voltage can be reduced.Type: ApplicationFiled: June 13, 2006Publication date: December 21, 2006Applicant: LG ELECTRONICS INC.Inventors: Seung-Do HAN, Seung-Suk OH, Jae-Hong AHN, Hyoun-Jeong SHIN
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Publication number: 20060284500Abstract: A motor having a reverse-rotation preventing unit, comprises: a casing; a stator fixedly-coupled to an inside of the casing; a primary rotor rotatably inserted into the stator; a motor shaft coupled to the primary rotor; a secondary rotor having a permanent magnet and rotatably inserted into an air gap between the stator and the primary rotor; a locking unit installed at an inner wall of the casing; a ratchet unit rotatably coupled to the secondary rotor, and locked or unlocked to/from the locking unit when the secondary rotor is forward-rotated or reverse-rotated, for rotating the secondary rotor in a forward direction; and a position setting unit for moving the ratchet unit to a locking position or a unlocking position by a difference between a centrifugal force generated when the secondary rotor is rotated and its restoration force. In the present invention, the motor is only forward-rotated without being reverse-rotated and thus a reliability thereof is enhanced.Type: ApplicationFiled: June 13, 2006Publication date: December 21, 2006Applicant: LG ELECTRONICS INC.Inventors: Seung-Do HAN, Seung-Suk OH, Jae-Hong AHN, Hyoun-Jeong SHIN, Dong-Il LEE
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Publication number: 20060226722Abstract: A hybrid induction motor comprises a stator fixedly installed in a casing, an induction rotor rotatably inserted into a center of the stator and having a shaft at a center thereof, a first synchronous rotor free-rotatably installed between the stator and the induction rotor in a circumferential direction of the shaft, and a second synchronous rotor facing the first synchronous rotor and free-rotatably installed between the stator and the induction rotor in a longitudinal direction of the shaft.Type: ApplicationFiled: January 5, 2006Publication date: October 12, 2006Applicant: LG Electronics Inc.Inventors: Jeong-Chul Kim, Dong-Il Lee, Seung-Do Han, Hyoun-Jeong Shin, Jae-Hong Ahn, Seung-Suk Oh
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Publication number: 20060208597Abstract: The hybrid induction motor includes a housing; a stator installed in the housing and having a stator core portion and a stator coil portion; a rotor coupling body having a rotary shaft rotatably installed in at the housing, a cage rotor portion rotating integrally with the rotary shaft, and a permanent magnet rotor portion coupled to a circumference of the cage rotor portion with a certain air gap so as to be freely rotatable with respect to the rotary shaft; and a reverse rotation preventing switch, when the rotary shaft rotates reversibly, coming in contact with the permanent magnet rotor portion which is moved along the shaft by thrust generated by the rotor coupling body and cutting off power being supplied to the stator coil portion.Type: ApplicationFiled: January 5, 2006Publication date: September 21, 2006Applicant: LG Electronics Inc.Inventors: Dong-Il Lee, Seung-Do Han, Hyoun-Jeong Shin, Jae-Hong Ahn, Seung-Suk Oh
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Publication number: 20060175924Abstract: An induction motor having a reverse-rotation preventing function, comprises: a stator provided with a winding coil generating flux by a current; an induction rotor provided with a cage and rotatably inserted in the stator, wherein a rotary shaft is coupled to its inside; a synchronous rotor provided with a permanent magnet and rotatably coupled between the stator and the induction rotor; an induction-force generating unit generating a force for moving the synchronous rotor in an axial direction; and a rotation preventing unit preventing a reverse rotation by fixing the synchronous rotor moved by the induction-force generating unit at the time of reverse rotation of the synchronous rotor.Type: ApplicationFiled: January 27, 2006Publication date: August 10, 2006Applicant: LG ELECTRONICS INCInventors: Seung-Do Han, Hyoun-Jeong Shin, Jae-Hong Ahn, Seung-Suk Oh, Dong-Il Lee
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Publication number: 20060113950Abstract: An apparatus for controlling a speed of a fan motor (HIM (Hybrid Induction Motor)) of an air-conditioner extends a speed control range of a fan motor of an air-conditioner by controlling revolutions per minute (RPM) of the fan motor. In order to extend the speed control range of the HIM, an RPM of the HIM is controlled based on a pre-set duty ratio of a switching device electrically connected with the HIM.Type: ApplicationFiled: March 4, 2005Publication date: June 1, 2006Inventors: Seung-Do Han, Hyoun-Jeong Shin, Seung-Suk Oh