Patents by Inventor Lihua Hu
Lihua Hu 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: 11953169Abstract: An in-situ replaceable LED car headlight and a design method, comprising a lamp body shell, a light source assembly provided with LED lamps, a driving assembly, and a fan, wherein the light source assembly is arranged at a head of the lamp body shell, and the driving assembly is arranged at a tail of the lamp body shell; a middle part of the lamp body shell is provided with a central installation part for accommodating the fan, and the fan is installed between the light source assembly and the driving assembly; the driving assembly is electrically connected with the fan by adopting a flexible board connecting wire. A structure in which the fan is arranged in the central position is adopted, so that the fan can be placed in the part with the largest internal space of the lamp body within the range limited by laws and regulations.Type: GrantFiled: March 3, 2023Date of Patent: April 9, 2024Assignee: Jiaxing Guangtai Lighting Co., Ltd.Inventors: Hui Gao, Linghui Chen, Chengjie Zhu, Lihua Hu
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Patent number: 11916884Abstract: The present disclosure discloses a vehicle and a vehicle security control method and system based on an open platform. The open platform includes a software development kit in which a control protocol is encapsulated, the software development kit provides an API function interface, and the method includes: receiving a call request from a third-party device for a target API function interface of the open platform; converting the call request by using the software development kit to generate a control signal that meets a requirement of the control protocol and that is used for controlling a first vehicle component in a vehicle; and transmitting the control signal to a security gateway through a first bus, to enable the security gateway to perform protocol conversion on the control signal, and transmitting the control signal to an in-vehicle network to control the first vehicle component in the vehicle.Type: GrantFiled: April 18, 2019Date of Patent: February 27, 2024Assignee: BYD COMPANY LIMITEDInventors: Chaolin Hu, Hong Yao, Lihua Wu
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Publication number: 20220302678Abstract: Semiconductors lasers are disclosed having an active region having a longitudinal axis, a first facet end, and a second facet end. The second facet end emitting the main output beam of light from of the respective semiconductor laser. The first facet end may have a low-reflection coating. The first facet end may be non-perpendicular to the longitudinal axis of the active region. The semiconductor lasers may be distributed feedback (DFB) lasers having a plurality of diffraction gratings along the longitudinal axis of the active region. The plurality of diffraction grating may include a first diffraction grating positioned proximate the first end of the active region, a second diffraction grating positioned proximate the second end of the active region, and a third diffraction grating positioned between the first diffraction grating and the second diffraction grating.Type: ApplicationFiled: March 17, 2021Publication date: September 22, 2022Applicant: MACOM Technology Solutions Holdings, Inc.Inventors: Yifan Jiang, Malcolm R. Green, Wolfgang Parz, Lihua Hu
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Patent number: 10992129Abstract: A power distribution system includes power converter systems electrically connected to a distribution bus which defines a point of common coupling. Each power converter system includes a power converter with semiconductor switching devices controlled using a pulse width modulation strategy with a switching frequency. A controller for each power converter system applies a spectrum analysis process to the respective power converter system that uses measured or derived zero sequence currents associated with the respective power converter system to determine the location of a ground fault within the power distribution system. Each controller applies a switching frequency process where the switching frequency of the power converter of at least one of the power converter systems is different from the switching frequency of the power converter of at least another one of the power converter systems during at least part of the time that the spectrum analysis process is applied.Type: GrantFiled: August 22, 2016Date of Patent: April 27, 2021Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LTD.Inventors: Lihua Hu, Teng Long, Martin Samuel Butcher, Allan David Crane
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Publication number: 20190317809Abstract: The present disclosure provides an implementation method and apparatus of timer, the method includes: determining a counting period of a hardware timer according to expiration time of a timer node expires first in a timer linked list; and when the counting period of the hardware timer is expired, traversing through the timer node in the timer linked list and updating the counting period of the hardware timer. The present disclosure provides a technical solution that can effectively reduce system power consumption and processor resource occupancy.Type: ApplicationFiled: June 26, 2019Publication date: October 17, 2019Inventors: MING ZHU, MINGLIANG WANG, GUOCHAO YIN, LIHUA HU
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Publication number: 20180241200Abstract: A power distribution system includes power converter systems electrically connected to a distribution bus which defines a point of common coupling. Each power converter system includes a power converter with semiconductor switching devices controlled using a pulse width modulation strategy with a switching frequency. A controller for each power converter system applies a spectrum analysis process to the respective power converter system that uses measured or derived zero sequence currents associated with the respective power converter system to determine the location of a ground fault within the power distribution system. Each controller applies a switching frequency process where the switching frequency of the power converter of at least one of the power converter systems is different from the switching frequency of the power converter of at least another one of the power converter systems during at least part of the time that the spectrum analysis process is applied.Type: ApplicationFiled: August 22, 2016Publication date: August 23, 2018Inventors: Lihua HU, Teng LONG, Martin Samuel BUTCHER, Allan David CRANE
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Patent number: 9825523Abstract: A converter control arrangement (18) for regulating the output current of a dc source power converter (16) comprises a current regulator (20) for regulating the output current based on a comparison of an output current value (Iout) of the dc source power converter (16) with a desired target current value (Itgt). When the output voltage value (Vout) of the dc source power converter (16) is within a normal operating voltage range between minimum and maximum voltage values (Vmin, Vmax) defined with respect to a voltage reference value (Vref) of the dc source power converter (16), the converter control arrangement (18) controls the target current value (Itgt) so that it is equal to a desired reference current value (Iref).Type: GrantFiled: February 29, 2012Date of Patent: November 21, 2017Assignee: GE Energy Power Conversion Technology LTDInventors: Lihua Hu, Richard Ian Stephens, Martin Samuel Butcher
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Patent number: 9713884Abstract: The present invention relates to a process for producing polyurethane foam moldings where the density of the molding is at most 500 g/L, by mixing the following to give a reaction mixture: a) organic polyisocyanates with b) polyesterols, c) blowing agents, d) cell-opening additives selected from the group consisting of homo- or copolymers based on ethylhexyl acrylate, on polybutadiene, on polyisobutene, and on diorganosilicones, or a mixture of two or more of said antifoams, e) silicone-based cell stabilizers and optionally f) chain extenders and/or crosslinking agents, g) catalysts, and h) other auxiliaries and/or additives, and charging the materials to a mold, and permitting them to complete a reaction to give a polyurethane foam molding. The present invention further relates to polyurethane moldings obtainable by this process, and to the use of said moldings as shoe sole, steering wheel, seat, or armrest.Type: GrantFiled: November 15, 2011Date of Patent: July 25, 2017Assignee: BASF SEInventors: Andre Kamm, Dong Liang, ZhiZhong Tang, LiHua Hu
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Patent number: 9130448Abstract: A converter control arrangement for regulating the output voltage of a dc source power converter connecting an ac system to a HVDC system to enable dc electrical power to be supplied from the ac system to the HVDC system comprises a dynamic droop control device including first and second droop controllers in which the droop rate of the second droop controller is greater than the droop rate of the first droop controller. The converter control arrangement comprises a voltage regulator for regulating the output voltage of the dc source power converter by comparing an output voltage value with a target voltage value derived by combining a reference voltage value and a droop voltage value provided by the dynamic droop control device. The reference current value is the desired output current value of the dc source power converter and defines, in combination with the reference voltage value, a target operating point.Type: GrantFiled: February 7, 2012Date of Patent: September 8, 2015Assignee: GE ENERGY POWER CONVERSION TECHNOLOGY LTD.Inventor: Lihua Hu
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Publication number: 20130334889Abstract: A converter control arrangement (18) for regulating the output current of a dc source power converter (16) comprises a current regulator (20) for regulating the output current based on a comparison of an output current value (Iout) of the dc source power converter (16) with a desired target current value (Itgt). When the output voltage value (Vout) of the dc source power converter (16) is within a normal operating voltage range between minimum and maximum voltage values (Vmin, Vmax) defined with respect to a voltage reference value (Vref) of the dc source power converter (16), the converter control arrangement (18) controls the target current value (Itgt) so that it is equal to a desired reference current value (Iref).Type: ApplicationFiled: February 29, 2012Publication date: December 19, 2013Applicant: GE Energy Power Conversion Technology Ltd.Inventors: Lihua Hu, Richard Ian Stephens, Martin Samuel Butcher
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Publication number: 20130314959Abstract: A converter control arrangement for regulating the output voltage of a dc source power converter connecting an ac system to a HVDC system to enable dc electrical power to be supplied from the ac system to the HVDC system comprises a dynamic droop control device including first and second droop controllers in which the droop rate of the second droop controller is greater than the droop rate of the first droop controller. The converter control arrangement comprises a voltage regulator for regulating the output voltage of the dc source power converter by comparing an output voltage value with a target voltage value derived by combining a reference voltage value and a droop voltage value provided by the dynamic droop control device. The reference current value is the desired output current value of the dc source power converter and defines, in combination with the reference voltage value, a target operating point.Type: ApplicationFiled: February 7, 2012Publication date: November 28, 2013Inventor: Lihua Hu
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Publication number: 20130249134Abstract: The present invention relates to a process for producing polyurethane foam moldings where the density of the molding is at most 500 g/L, by mixing the following to give a reaction mixture: a) organic polyisocyanates with b) polyesterols, c) blowing agents, d) cell-opening additives selected from the group consisting of homo- or copolymers based on ethylhexyl acrylate, on polybutadiene, on polyisobutene, and on diorganosilicones, or a mixture of two or more of said antifoams, e) silicone-based cell stabilizers and optionally f) chain extenders and/or crosslinking agents, g) catalysts, and h) other auxiliaries and/or additives, and charging the materials to a mold, and permitting them to complete a reaction to give a polyurethane foam molding. The present invention further relates to polyurethane moldings obtainable by this process, and to the use of said moldings as shoe sole, steering wheel, seat, or armrest.Type: ApplicationFiled: November 15, 2011Publication date: September 26, 2013Applicant: BASF SEInventors: Andre Kamm, Dong Liang, ZhiZhong Tang, LiHua Hu
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Patent number: 8154260Abstract: Within generator systems maintenance of stability in terms of voltage is desirable. Generally, several generators will be arranged in parallel within the generator system with one generator voltage controlled to provide dynamic responsiveness to load switching. With regard to some loads which are generally of an active nature, the capacity of a first generator, which is voltage controlled, may be insufficient to adequately avoid transient voltage instability. By providing an actuator signal from a load to act as a pre-emptive or forward feed to an electrical current controlled generator, that second electrical current generator can be arranged to provide additional or reduced electrical current to avoid system voltage instability.Type: GrantFiled: March 16, 2009Date of Patent: April 10, 2012Assignee: Rolls-Royce PLCInventors: Lihua Hu, David R Trainer, Stephen A Long
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Patent number: 8111496Abstract: An earthing arrangement for a DC electrical system (10), the electrical system (10) comprises a plurality of earthing points (24A, 24B, 24C) and each earthing point (24A, 24B, 24C) is directly and permanently connected to earth (26) by a high impedance connection (28A, 28B, 28C). Each earthing point (24A, 24B, 24C) is selectively connectable to earth (26) in electrical parallel with the high impedance connection (28A, 28B, 28C) by a solid connection (30A, 30B, 30C) and a switch (32A, 32B, 32C). In first mode of operation the switch (32A) between the earthing point (24A) and the earth (26) of only one of the plurality of earthing points (24A, 24B, 24C) is closed.Type: GrantFiled: February 11, 2009Date of Patent: February 7, 2012Assignee: Rolls-Royce PLCInventors: Stephen A Long, David R Trainer, Lihua Hu, Huw L Edwards
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Patent number: 7847431Abstract: Electrical power generation systems typically comprise an electrical power distribution arrangement in which a number of electrical power generators are coupled in parallel. In such circumstances in order to avoid conflict generally a first electrical power generator is controlled with a voltage controller while second electrical power generators have electrical current controllers. As loads are switched into and out of the electrical distribution system in normal operation the first electrical power generator and its voltage controller can accommodate voltage dynamics and therefore maintain a desired voltage. However, in order to accommodate heavier loads switching, the dynamic operation of the electrical current controller is achieved through utilizing operational voltage margins from a desired voltage as control signals to the electrical current controller.Type: GrantFiled: March 16, 2009Date of Patent: December 7, 2010Assignee: Rolls-Royce plcInventors: Lihua Hu, David R Trainer, Stephen A Long
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Patent number: 7800880Abstract: In a DC electrical power system used in an aircraft, an earthing arrangement is provided between electrical power supply rails in the form of a pair of capacitors with a mid electrical voltage earthing point, having an earthing path, in which electrical resistance is provided to limit electrical current flow and therefore allow continued operation despite the earth fault.Type: GrantFiled: June 6, 2007Date of Patent: September 21, 2010Assignee: Rolls-Royce plcInventors: Lihua Hu, David R Trainer, Michael P Hirst, Stuart Galloway
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Patent number: D864153Type: GrantFiled: April 25, 2018Date of Patent: October 22, 2019Inventor: Lihua Hu
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Patent number: D873789Type: GrantFiled: July 7, 2017Date of Patent: January 28, 2020Inventor: Lihua Hu
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Patent number: D885370Type: GrantFiled: July 7, 2017Date of Patent: May 26, 2020Inventor: Lihua Hu
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Patent number: D945277Type: GrantFiled: April 26, 2020Date of Patent: March 8, 2022Assignee: JIAXING GUANGTAI LIGHTING CO., LTD.Inventors: Lihua Hu, Hui Gao, Huojun Gu