Patents by Inventor Min Hun CHI
Min Hun CHI 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: 11881805Abstract: The present disclosure relates to an interface circuit of a motor driving apparatus, the interface circuit comprising a power circuit unit for controlling driving of a motor, and a control panel unit which controls the power circuit unit and provides a user interface, wherein the power circuit unit further comprises a second MCU which controls a relay and an additional device unit and detects an operation state of the additional device unit, and the second MCU can communicate with a first MCU of the control panel unit via a communication line.Type: GrantFiled: July 11, 2019Date of Patent: January 23, 2024Assignee: LS ELECTRIC CO., LTD.Inventors: Hyun Gyu Ryu, Chun Suk Yang, Jong Wook Jeon, Min Hun Chi
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Publication number: 20220149769Abstract: The present disclosure relates to an interface circuit of a motor driving apparatus, the interface circuit comprising a power circuit unit for controlling driving of a motor, and a control panel unit which controls the power circuit unit and provides a user interface, wherein the power circuit unit further comprises a second MCU which controls a relay and an additional device unit and detects an operation state of the additional device unit, and the second MCU can communicate with a first MCU of the control panel unit via a communication line.Type: ApplicationFiled: July 11, 2019Publication date: May 12, 2022Inventors: Hyun Gyu RYU, Chun Suk YANG, Jong Wook JEON, Min Hun CHI
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Publication number: 20220149705Abstract: The present disclosure relates to a device for driving a motor, including a lower case having an accommodating space formed therein and an open upper side; an upper case closing an open surface of the lower case to form an inner space; a central case disposed in the lower case to partition an inner space formed by the lower case and the upper case; a first board disposed on the lower case and comprising a first connector; a second board disposed on the central case and comprising a second connector; and a connection board disposed in the inner space and comprising a first connection connector electrically connected to the first connector and a second connection connector electrically connected to the second connector to transmit electric signals between the board.Type: ApplicationFiled: July 11, 2019Publication date: May 12, 2022Inventors: Min Hun CHI, Chun Suk YANG
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Patent number: 10312836Abstract: Disclosed is a disconnection detection apparatus of a sinusoidal wave signal. The disconnection detection apparatus of the present disclosure converts a first sinusoidal wave and a second sinusoidal wave into absolute values, respectively, and determines that disconnection occurs when a value of the first sinusoidal wave is less than a first comparison value that is greater than a minimum value and a value of the second sinusoidal wave is less than a second comparison value that is less than a maximum value.Type: GrantFiled: December 20, 2016Date of Patent: June 4, 2019Assignee: LSIS CO., LTD.Inventor: Min-Hun Chi
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Publication number: 20170310250Abstract: Disclosed is a disconnection detection apparatus of a sinusoidal wave signal. The disconnection detection apparatus of the present disclosure converts a first sinusoidal wave and a second sinusoidal wave into absolute values, respectively, and determines that disconnection occurs when a value of the first sinusoidal wave is less than a first comparison value that is greater than a minimum value and a value of the second sinusoidal wave is less than a second comparison value that is less than a maximum value.Type: ApplicationFiled: December 20, 2016Publication date: October 26, 2017Inventor: Min-Hun CHI
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Patent number: 9692341Abstract: An apparatus for detecting speed of a motor is disclosed, the apparatus including an amplifier configured to amplify a two-phase sine-wave signal inputted from an encoder based on rotation of a motor; a first conversion unit configured to convert the two-phase sine-wave signal to a digital data; a second conversion unit configured to convert the two-phase sine-wave signal to a square-wave signal; a counter unit configured to accumulate by counting the square-wave signal; and a speed determination unit configured to determine a speed of the motor, by receiving the digital data from the first conversion unit and the accumulated count from the counter unit.Type: GrantFiled: March 5, 2015Date of Patent: June 27, 2017Assignee: LSIS CO., LTD.Inventor: Min Hun Chi
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Publication number: 20160268936Abstract: The method for detecting an initial position of a magnetic pole of a rotor included in a permanent magnet synchronous motor according to an embodiment of the present disclosure includes generating three-phase voltage vectors to be applied onto a u-phase, a v-phase, and a w-phase of a stator winding, applying the three-phase voltage vectors on the u-phase, the v-phase, and the w-phase of a stator winding, respectively, calculating a current difference value of the u-phase, a current difference value of the v-phase, and a current difference value of the w-phase using currents of the stator winding flowing in a magnetizing direction and in a un-magnetizing direction by applying the three-phase voltage vectors, and determining the initial position of the magnetic pole of the rotor using the current difference value of the u-phase, the current difference value of the v-phase, and the current difference value of the w-phase.Type: ApplicationFiled: March 3, 2016Publication date: September 15, 2016Inventor: Min-Hun Chi
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Patent number: 9340393Abstract: Disclosed is a method for measuring opening and closing delay time of elevator brake, the method including outputting, by a brake signal output unit, a brake signal, receiving, by a brake signal checking unit, the brake signal and determining whether the brake signal is an opening signal or a closing signal to output an opening/closing determination signal, receiving, by a brake counter unit, the opening/closing determination signal, and starting a count for measuring a brake opening time or a brake closing time to accumulate and output counted value, determining, by a motor drive checking unit, whether a motor configured to drive an elevator is driven upon receipt of the counted values and outputting a drive determination signal, and receiving, by a brake opening/closing delay computation unit, the drive determination signal and the counted value to compute a brake opening/closing delay time.Type: GrantFiled: July 28, 2014Date of Patent: May 17, 2016Assignee: LSIS CO., LTD.Inventor: Min Hun Chi
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Patent number: 9246430Abstract: Provided is a method for controlling an inverter, the method comprising calculating an optimal speed, determining a final speed as the optimal speed when a command speed is higher than a rated speed level of a motor, and determining the final speed as the command speed when the command speed is lower than or equal to the rated speed level, or higher than a predetermined optimal speed level.Type: GrantFiled: February 7, 2013Date of Patent: January 26, 2016Assignee: LSIS Co., Ltd.Inventor: Min Hun Chi
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Publication number: 20150263659Abstract: An apparatus for detecting speed of a motor is disclosed, the apparatus including an amplifier configured to amplify a two-phase sine-wave signal inputted from an encoder based on rotation of a motor; a first conversion unit configured to convert the two-phase sine-wave signal to a digital data; a second conversion unit configured to convert the two-phase sine-wave signal to a square-wave signal; a counter unit configured to accumulate by counting the square-wave signal; and a speed determination unit configured to determine a speed of the motor, by receiving the digital data from the first conversion unit and the accumulated count from the counter unit.Type: ApplicationFiled: March 5, 2015Publication date: September 17, 2015Applicant: LSIS CO., LTD.Inventor: Min Hun CHI
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Publication number: 20150059460Abstract: Disclosed is a method for measuring opening and closing delay time of elevator brake, the method including outputting, by a brake signal output unit, a brake signal, receiving, by a brake signal checking unit, the brake signal and determining whether the brake signal is an opening signal or a closing signal to output an opening/closing determination signal, receiving, by a brake counter unit, the opening/closing determination signal, and starting a count for measuring a brake opening time or a brake closing time to accumulate and output counted value, determining, by a motor drive checking unit, whether a motor configured to drive an elevator is driven upon receipt of the counted values and outputting a drive determination signal, and receiving, by a brake opening/closing delay computation unit, the drive determination signal and the counted value to compute a brake opening/closing delay time.Type: ApplicationFiled: July 28, 2014Publication date: March 5, 2015Applicant: LSIS CO., LTD.Inventor: Min Hun CHI