Patents by Inventor Ka Wai Eric Cheng
Ka Wai Eric Cheng 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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Publication number: 20240088412Abstract: Embodiments of the present disclosure provide a fuel cell power generation device, which includes: a fuel cell with an anode and a cathode, for decomposing hydrogen and generating electric energy through reaction of decomposed hydrogen and oxygen; a first delivery pipe connected between a pipeline of a hydrogen-containing gas and the fuel cell, for delivering the hydrogen-containing gas to the anode of the fuel cell; a first output pipe connected to the fuel cell, for discharging a first remaining gas contacted with the anode of the fuel cell; a second delivery pipe connected to the fuel cell, for delivering an oxygen-containing gas to the cathode of the fuel cell; and a second output pipe connected to the fuel cell, for discharging a second remaining gas contacted with the cathode of the fuel cell.Type: ApplicationFiled: August 4, 2023Publication date: March 14, 2024Applicants: The Hong Kong Polytechnic University, Yee Hop Environmental Protection LimitedInventors: Ka Wai Eric Cheng, Yuk Ping Cho
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Publication number: 20230087546Abstract: An energy storage system is provided for an electric vehicle. The energy storage system comprises a first energy storage source. The first energy storage source includes an ammonia tank configured to hold ammonia, an ammonia converter configured to receive ammonia from the ammonia tank and convert the received ammonia into hydrogen, and a fuel cell system communicating with the ammonia converter and configured to generate output power from hydrogen that is received from the ammonia converter.Type: ApplicationFiled: September 15, 2022Publication date: March 23, 2023Inventors: Ka Wai Eric CHENG, Molly Meng-Jung LI, Shu Ping LAU, Shuangxia NIU
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Publication number: 20220329173Abstract: The invention relates to a magnetically coupled charging system and method. The magnetically coupled charging system comprises: a resonant inverter; a split core transformer configured to receive a resonant power from the resonant inverter; and a rectifier assembly configured to receive a transformed resonant power from the split core transformer and transmit the transformed resonant power to a to-be-charged battery; the split core transformer comprising a primary winding and a secondary winding, wherein the primary and secondary windings are split from each other, the resonant inverter and the primary winding of the split core transformer are arranged in an onshore charging system, the rectifier assembly and the secondary winding of the split core transformer are arranged in an onboard charger. The invention has the following advantages of: eliminating the risk of electric shock and short circuit fault at a connection point and eliminating an arcing or sparking problem.Type: ApplicationFiled: April 7, 2022Publication date: October 13, 2022Inventors: Ka Wai Eric CHENG, Shu Chuen IP, Hon Ki TSANG, Kin Lung Jerry KAN, Wing Wa CHAN, Ho Fai HO, Yat Chi FONG
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Patent number: 11264987Abstract: Methods and apparatus for detecting possible living body contact at an electrical contact surface is disclosed, comprising sending a non-hazardous probing signal to the contact surface, detecting an electrical response from the contact surface in response to the electrical probing signal, and determining whether a captured responsive signal has characteristics of an expected responsive pulse, and to output a positive output signal indicative of possible living body to mitigate risks of electrical shock.Type: GrantFiled: November 5, 2018Date of Patent: March 1, 2022Assignee: Vicwood Prosperity Technology LimitedInventors: Ka Wai Eric Cheng, Man Yau Law, Hin Hung Ng, Kwok Shing Wong
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Publication number: 20210409022Abstract: Methods and apparatus for detecting possible living body contact at an electrical contact surface is disclosed, comprising sending a non-hazardous probing signal to the contact surface, detecting an electrical response from the contact surface in response to the electrical probing signal, and determining whether a captured responsive signal has characteristics of an expected responsive pulse, and to output a positive output signal indicative of possible living body to mitigate risks of electrical shock.Type: ApplicationFiled: November 5, 2018Publication date: December 30, 2021Inventors: Ka Wai Eric Cheng, Man Yau Law, Hin Hung Ng, Kwok Shing Wong
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Patent number: 11211795Abstract: An apparatus for monitoring an electrical apparatus, the load monitoring apparatus comprising a controller which is configured to capture and process voltage and current data of an electrical apparatus, which is electrically connected with a power supply, to obtain electrical parameters of the electrical apparatus, to store the electrical parameters as measured electrical parameters, to compare the measured electrical parameters with a set of pre-stored electrical parameters, to determine whether the measured electrical parameters match with the stored electrical parameters, and to operate a power switch to turn off power supply to the electrical parameters if the measured electrical parameters do not match with the stored electrical parameters.Type: GrantFiled: February 26, 2020Date of Patent: December 28, 2021Assignee: Vicwood Prosperity Technology LimitedInventors: Ka Wai Eric Cheng, Man Yau Law, Hin Hung Ng, Kwok Shing Wong
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Publication number: 20200373048Abstract: A power transmission apparatus comprising a primary magnetic circuit, a primary excitation circuit for connection to an alternating power source to supply input power to the primary magnetic circuit, and a secondary magnetic circuit for supplying output power to a load is disclosed. The power transmission apparatus facilitates wireless power transfer (WPT). The primary magnetic circuit In and the secondary magnetic circuit are detachably attached and cooperate to form a looped output magnetic circuit defining a looped output magnetic path along which an output power carrying magnetic flux flows. The primary magnetic circuit and the secondary magnetic circuit are detachably attached by a magnetic attraction force due to flowing of the output power carrying magnetic flux between the primary magnetic circuit and the secondary magnetic circuit during power transmission operations.Type: ApplicationFiled: February 12, 2019Publication date: November 26, 2020Inventor: Ka Wai Eric Cheng
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Patent number: 10819340Abstract: A method of detecting possible living body contact at an electrical contact surface, wherein the living body has a detectable characteristic initial impedance and a corresponding characteristic time constant defined by the initial impedance upon touching the electrical contact surface when the electrical contact surface is at a touching voltage, wherein the method comprises sending a non-hazardous probing signal to the contact surface, wherein the probing signal comprises one probing pulse or a plurality of probing pulses forming a probing pulse train, and the probing pulse has a base voltage level and a probing voltage level which is above the base voltage level and equal to the touching voltage or a probing voltage level which is below the base voltage level and equal to the touching voltage; detecting an electrical response from the contact surface in response to the electrical probing signal, wherein the electrical response comprises electrical response signals; and determining from the electrical responsType: GrantFiled: November 3, 2017Date of Patent: October 27, 2020Assignee: VICWOOD PROSPERITY TECHNOLOGY LIMITEDInventors: Ka Wai Eric Cheng, Man Yau Law, Hin Hung Ng
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Patent number: 10693321Abstract: In a wireless power transfer (WPT) system, a power-transmitting unit has a loop-shaped magnetic core formed by alternately arranging high-permeability (HP) and low-permeability (LP) core sections to give an interleaving pattern. A primary coil wound on the magnetic core provides a magnetic flux traveling therein when excited by an AC power source. A power-receiving unit has a pickup core shaped and dimensioned to overlie one or any LP core section, and to partially overlap HP core sections immediately adjacent to the LP core section that is overlay. The pickup core has a relative permeability higher than that of the aforesaid LP core section, causing at least a part of the magnetic flux to divert from this LP core section to the pickup core. The diverted part of magnetic flux generates electrical power in a secondary pickup coil wound on the pickup core to achieve WPT.Type: GrantFiled: November 16, 2018Date of Patent: June 23, 2020Assignee: THE HONG KONG POLYTECHNIC UNIVERSITYInventors: Ka Wai Eric Cheng, Manxin Chen
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Publication number: 20200195008Abstract: An apparatus for monitoring an electrical apparatus, the load monitoring apparatus comprising a controller which is configured to capture and process voltage and current data of an electrical apparatus, which is electrically connected with a power supply, to obtain electrical parameters of the electrical apparatus, to store the electrical parameters as measured electrical parameters, to compare the measured electrical parameters with a set of pre-stored electrical parameters, to determine whether the measured electrical parameters match with the stored electrical parameters, and to operate a power switch to turn off power supply to the electrical parameters if the measured electrical parameters do not match with the stored electrical parameters.Type: ApplicationFiled: February 26, 2020Publication date: June 18, 2020Inventors: Ka Wai Eric Cheng, Man Yau Law, Hin Hung Ng, Kwok Shing Wong
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Patent number: 10680530Abstract: A power supply control apparatus comprising a controller, a load current monitor and power connection circuitry operable by the controller for controlling power supply from a power source to a load. The controller is to operate to receive an identification number from a load and to use the identification number to retrieve a set of stored reference electrical parameters of the load from a set of databases, to measure operational electrical parameters of the load, to compare measured electrical parameters with the reference electrical parameters, and to determine whether the load is fit for power supply with reference to outcome of comparison between the measured electrical parameters and the reference electrical parameters.Type: GrantFiled: February 19, 2019Date of Patent: June 9, 2020Assignee: Vicwood Prosperity Technology LimitedInventors: Ka Wai Eric Cheng, Man Yau Law, Hin Hung Ng
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Publication number: 20190363712Abstract: A method of detecting possible living body contact at an electrical contact surface, wherein the living body has a detectable characteristic initial impedance and a corresponding characteristic time constant defined by the initial impedance upon touching the electrical contact surface when the electrical contact surface is at a touching voltage, wherein the method comprises sending a non-hazardous probing signal to the contact surface, wherein the probing signal comprises one probing pulse or a plurality of probing pulses forming a probing pulse train, and the probing pulse has a base voltage level and a probing voltage level which is above the base voltage level and equal to the touching voltage or a probing voltage level which is below the base voltage level and equal to the touching voltage; detecting an electrical response from the contact surface in response to the electrical probing signal, wherein the electrical response comprises electrical response signals; and determining from the electrical responsType: ApplicationFiled: November 3, 2017Publication date: November 28, 2019Inventors: Ka Wai Eric CHENG, Man Yau LAW, Hin Hung NG
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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: 20190190395Abstract: A power supply control apparatus comprising a controller, a load current monitor and power connection circuitry operable by the controller for controlling power supply from a power source to a load. The controller is to operate to receive an identification number from a load and to use the identification number to retrieve a set of stored reference electrical parameters of the load from a set of databases, to measure operational electrical parameters of the load, to compare measured electrical parameters with the reference electrical parameters, and to determine whether the load is fit for power supply with reference to outcome of comparison between the measured electrical parameters and the reference electrical parameters.Type: ApplicationFiled: February 19, 2019Publication date: June 20, 2019Inventors: Ka Wai Eric Cheng, Man Yau Law, Hin Hung Ng
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Publication number: 20190157906Abstract: In a wireless power transfer (WPT) system, a power-transmitting unit has a loop-shaped magnetic core formed by alternately arranging high-permeability (HP) and low-permeability (LP) core sections to give an interleaving pattern. A primary coil wound on the magnetic core provides a magnetic flux traveling therein when excited by an AC power source. A power-receiving unit has a pickup core shaped and dimensioned to overlie one or any LP core section, and to partially overlap HP core sections immediately adjacent to the LP core section that is overlay. The pickup core has a relative permeability higher than that of the aforesaid LP core section, causing at least a part of the magnetic flux to divert from this LP core section to the pickup core. The diverted part of magnetic flux generates electrical power in a secondary pickup coil wound on the pickup core to achieve WPT.Type: ApplicationFiled: November 16, 2018Publication date: May 23, 2019Inventors: Ka Wai Eric CHENG, Manxin CHEN
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Patent number: 10211623Abstract: A power supply control device comprises a controller and power connection circuitry. The power connection circuitry comprises a switchable power connection path between a source side and a load side. The power connection path is switchable to operate in a first operation state or an on-state in which state impedance between the source side and the load side is very low to permit flow of operation current through the power connection path, or a second operation state or an off-state in which state impedance between the source side and the load side is very high to impede flow of operation current through the power connection path. The controller is to operate to transmit at least one type of enquiry signals to the load side and to determine with reference to at least one type of received responsive signals whether a load on the load side is eligible for power supply connection.Type: GrantFiled: May 2, 2016Date of Patent: February 19, 2019Assignee: Eton Solutions LimitedInventors: Ka Wai Eric Cheng, Man Yau Law, Hin Hung Ng
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Publication number: 20180152015Abstract: A power supply control device comprises a controller and power connection circuitry. The power connection circuitry comprises a switchable power connection path between a source side and a load side. The power connection path is switchable to operate in a first operation state or an on-state in which state impedance between the source side and the load side is very low to permit flow of operation current through the power connection path, or a second operation state or an off-state in which state impedance between the source side and the load side is very high to impede flow of operation current through the power connection path. The controller is to operate to transmit at least one type of enquiry signals to the load side and to determine with reference to at least one type of received responsive signals whether a load on the load side is eligible for power supply connection.Type: ApplicationFiled: May 2, 2016Publication date: May 31, 2018Inventors: Ka Wai Eric CHENG, Man Yau LAW, Hin Hung NG
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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