Patents by Inventor Xiangdang Xue
Xiangdang Xue 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: 11046553Abstract: An elevator automatic rescue and energy-saving control method, the method comprising: when the power grid supplies power normally, selecting a single current in a three-phase power grid (9) as an AC power supply for an elevator control system (10); controlling a DC-DC converter (2) to charge the super capacitor module (1) connected to the DC-DC converter to a specified standby electric energy level; and when the power grid is suddenly interrupted, selecting to use the electric energy stored in the super capacitor module (1) as a rescue electric energy for a traction motor (7) and the elevator control system (10). The described method uses a super capacitor module, so that a stable and reliable elevator rescue power supply is provided when the power grid is suddenly interrupted, and the regenerative electric energy dissipated during elevator braking operation is stored and utilized during elevator operation, thereby conserving energy.Type: GrantFiled: September 10, 2015Date of Patent: June 29, 2021Assignee: Forward Electronics Company LimitedInventors: Eric Ka Wai Cheng, Eugene Yu Ching Chan, Xiangdang Xue, Lok Yan Lorraine Chan
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Patent number: 10418825Abstract: A voltage balancing circuit is applied to a power supply system. The power supply system comprises N power storage devices. The voltage balancing circuit comprises: N switches, N capacitors and a controller; the N switches are respectively connected to the N serial power storage devices; the N switches are respectively connected to the first terminals of the N capacitors; the second terminals of the N capacitors are connected to a common neutral line; the controller is connected to the N switches through a control line to control the switching of the N switches. The voltage balancing circuit avoids power loss when balancing the voltage of a plurality of serial power storage devices, and is small in size and low-cost, and balances voltage quickly.Type: GrantFiled: June 2, 2015Date of Patent: September 17, 2019Assignee: THE HONG KONG POLYTECHNIC UNIVERSITYInventors: Ka Wai Eric Cheng, Yuanmao Ye, Xiangdang Xue
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Publication number: 20180229968Abstract: An elevator automatic rescue and energy-saving control method, the method comprising: when the power grid supplies power normally, selecting a single current in a three-phase power grid (9) as an AC power supply for an elevator control system (10); controlling a DC-DC converter (2) to charge the super capacitor module (1) connected to the DC-DC converter to a specified standby electric energy level; and when the power grid is suddenly interrupted, selecting to use the electric energy stored in the super capacitor module (1) as a rescue electric energy for a traction motor (7) and the elevator control system (10). The described method uses a super capacitor module, so that a stable and reliable elevator rescue power supply is provided when the power grid is suddenly interrupted, and the regenerative electric energy dissipated during elevator braking operation is stored and utilized during elevator operation, thereby conserving energy.Type: ApplicationFiled: September 10, 2015Publication date: August 16, 2018Inventors: Eric Ka Wai Cheng, Eugene Yu Ching Chan, Xiangdang Xue, Lok Yan Lorraine Chan
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Publication number: 20170310128Abstract: A voltage balancing circuit is applied to a power supply system. The power supply system comprises N power storage devices. The voltage balancing circuit comprises: N switches, N capacitors and a controller; the N switches are respectively connected to the N serial power storage devices; the N switches are respectively connected to the first terminals of the N capacitors; the second terminals of the N capacitors are connected to a common neutral line; the controller is connected to the N switches through a control line to control the switching of the N switches. The voltage balancing circuit avoids power loss when balancing the voltage of a plurality of serial power storage devices, and is small in size and low-cost, and balances voltage quickly.Type: ApplicationFiled: June 2, 2015Publication date: October 26, 2017Applicant: THE HONG KONG POLYTECHNIC UNIVERSITYInventors: Ka Wai Eric Cheng, Yuanmao Ye, Xiangdang Xue
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Patent number: 8833780Abstract: An active suspension system suitable for use with a vehicle, includes a passive suspension element with a first end adapted for rigid engagement to a sprung mass of the vehicle and a second end adapted for rigid engagement to an unsprung mass of the vehicle. Also included is an active suspension element with a linear switched reluctance actuator which has a first end adapted for rigid engagement to the sprung mass of the vehicle and a second end adapted for rigid engagement to the unsprung mass of the vehicle.Type: GrantFiled: December 22, 2011Date of Patent: September 16, 2014Assignee: Hong Kong Productivity CouncilInventors: Ka Wai Eric Cheng, Xiangdang Xue, Zhu Zhang
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Patent number: 8544580Abstract: A switched reluctance motor includes an inner stator having a plurality of stator poles with coil windings, the inner stator having a plurality of stator phases, an outer rotor configured to rotate around the inner stator, the outer rotor having a plurality of rotor poles, at least one position sensor configured to detect a position of the outer rotor, and a DC supply configured to sequentially supply current to excite the stator phases.Type: GrantFiled: May 18, 2010Date of Patent: October 1, 2013Assignee: The Hong Kong Polytechnic UniversityInventors: Ka Wai Eric Cheng, Xiangdang Xue, Chow Norbert Cheung
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Publication number: 20130161921Abstract: An active suspension system suitable for use with a vehicle, includes a passive suspension element with a first end adapted for rigid engagement to a sprung mass of the vehicle and a second end adapted for rigid engagement to an unsprung mass of the vehicle. Also included is an active suspension element with a linear switched reluctance actuator which has a first end adapted for rigid engagement to the sprung mass of the vehicle and a second end adapted for rigid engagement to the unsprung mass of the vehicle.Type: ApplicationFiled: December 22, 2011Publication date: June 27, 2013Applicant: Automotive Parts and Accessory Systems R&D Centre LimitedInventors: Ka Wai Eric Cheng, Xiangdang Xue, Zhu Zhang
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Patent number: 8228021Abstract: A converter circuit includes a phase circuit having a switch module, a first winding, a first diode, a second winding, and a second diode. The second winding is inductively coupled to the first winding. A multi-phase motor including the converter circuit, and a related method of controlling such a motor, are also provided.Type: GrantFiled: July 24, 2009Date of Patent: July 24, 2012Assignee: Automotive Parts and Accessory Systems R & D Centre LimitedInventors: Ka Wai Eric Cheung, Xiangdang Xue
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Patent number: 8217618Abstract: The present invention relates to an energy-saving system for three-phase induction motors and is based on the principle of variable voltage control at constant speed. It is composed of a microprocessor, exampling circuit, sensing circuit, acquiring circuit, firing circuit, and AC to AC converter. The system is to automatically adjust the voltage to the induction motor with the variation in the motor load, in order to obtain high operating power factor and efficiency. The system will result in considerable energy-savings when a three-phase induction motor runs under constant light-load or variable-load with low duty ratio.Type: GrantFiled: February 20, 2009Date of Patent: July 10, 2012Assignee: The Hong Kong Polytechnic UniversityInventors: Ka Wai Eric Cheng, Xiangdang Xue
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Publication number: 20110284300Abstract: A switched reluctance motor includes an inner stator having a plurality of stator poles with coil windings, the inner stator having a plurality of stator phases, an outer rotor configured to rotate around the inner stator, the outer rotor having a plurality of rotor poles, at least one position sensor configured to detect a position of the outer rotor, and a DC supply configured to sequentially supply current to excite the stator phases.Type: ApplicationFiled: May 18, 2010Publication date: November 24, 2011Applicant: THE HONG KONG POLYTECHNIC UNIVERSITYInventors: Ka Wai Eric Cheng, Xiangdang Xue, Chow Norbert Cheung
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Publication number: 20110018480Abstract: A converter circuit includes a phase circuit having a switch module, a first winding, a first diode, a second winding, and a second diode. The second winding is inductively coupled to the first winding. A multi-phase motor including the converter circuit, and a related method of controlling such a motor, are also provided.Type: ApplicationFiled: July 24, 2009Publication date: January 27, 2011Applicant: AUTOMOTIVE PARTS AND ACCESSORY SYSTEMS R & D CENTRE LIMITEDInventors: Ka Wai Eric Cheng, Xiangdang Xue
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Publication number: 20100213886Abstract: The present invention relates to an energy-saving system for three-phase induction motors and is based on the principle of variable voltage control at constant speed. It is composed of a microprocessor, exampling circuit, sensing circuit, acquiring circuit, firing circuit, and AC to AC converter. The system is to automatically adjust the voltage to the induction motor with the variation in the motor load, in order to obtain high operating power factor and efficiency. The system will result in considerable energy-savings when a three-phase induction motor runs under constant light-load or variable-load with low duty ratio.Type: ApplicationFiled: February 20, 2009Publication date: August 26, 2010Applicant: The Hong Kong Polytechnic UniversityInventors: Eric Ka Wai Cheng, Xiangdang Xue