Patents by Inventor Ziang Chen
Ziang Chen 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: 10659552Abstract: A method for monitoring health of a server is disclosed. The method is performed by a cache device and includes: acquiring information related to results of health checkups on the server based on an inquiry from a load-balancing device about the results of health checkups on the server; and transmitting the information related to results of the health checkups on the server to the load-balancing device.Type: GrantFiled: June 1, 2016Date of Patent: May 19, 2020Assignee: ALIBABA GROUP HOLDING LIMITEDInventors: Qian Wang, Zhuo Chen, Ziang Chen, Jiaming Wu
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Patent number: 10637298Abstract: A wireless power transfer system with a class DE inverter for power transfer to a load. The wireless power transfer system includes a half-bridge circuit, a zero voltage switching (ZVS) tank, a shunt capacitor array, an evaluation circuit, and a controller. The half-bridge circuit has two transistors connected in series with each of the two transistors driven by a gate driving signal with a duty cycle. The ZVS tank and the shunt capacitor array are electrically connected with the half-bridge circuit. The ZVS tank includes two capacitors and an inductor. The shunt capacitor array has a capacitance that is tunable. The evaluation circuit calculates a power conversion efficiency of the system. The controller receives the power conversion efficiency from the evaluation circuit and generates control signals to adjust the duty cycle of the gate driving signal and to adjust the capacitance of the shunt capacitor array in order to maximize the power conversion efficiency of the system.Type: GrantFiled: February 14, 2018Date of Patent: April 28, 2020Assignee: HONG KONG APPLIED SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE COMPANY LIMITEDInventors: Ziang Chen, Jun Chen, Hang Sang Lee
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Publication number: 20190252918Abstract: A wireless power transfer system with a class DE inverter for power transfer to a load. The wireless power transfer system includes a half-bridge circuit, a zero voltage switching (ZVS) tank, a shunt capacitor array, an evaluation circuit, and a controller. The half-bridge circuit has two transistors connected in series with each of the two transistors driven by a gate driving signal with a duty cycle. The ZVS tank and the shunt capacitor array are electrically connected with the half-bridge circuit. The ZVS tank includes two capacitors and an inductor. The shunt capacitor array has a capacitance that is tunable. The evaluation circuit calculates a power conversion efficiency of the system. The controller receives the power conversion efficiency from the evaluation circuit and generates control signals to adjust the duty cycle of the gate driving signal and to adjust the capacitance of the shunt capacitor array in order to maximize the power conversion efficiency of the system.Type: ApplicationFiled: February 14, 2018Publication date: August 15, 2019Inventors: Ziang CHEN, Jun CHEN, Hang Sang LEE
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Patent number: 10230311Abstract: A method prevents shoot-through currents and reduces body-diode conduction time in an inverter circuit by changing dead times for transistors in the inverter circuit. A sensing resistor senses temperatures of transistors in the inverter circuit. A delay generator changes delay times in response to receiving the temperatures of the transistors from the sensing resistor. A dead time generation unit changes the dead times for the transistors in response to changes in the delay times.Type: GrantFiled: March 15, 2017Date of Patent: March 12, 2019Assignee: Hong Kong Applied Science and Technology Research Institute Co. Ltd.Inventors: Ziang Chen, Jun Chen, Hang Sang Lee
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Publication number: 20190028538Abstract: There is provided a method, an apparatus, and a system for controlling service traffic between data centers. According to one exemplary method, an active data center and a standby data center that have a mutually redundant relationship are provided. At least one load balancing device is deployed in each of the active data center and the standby data center. In the case of switching from the active data center to the standby data center, service traffic transmitted to the active data center is guided to the standby data center, and the load balancing device in the standby data center allocates the service traffic.Type: ApplicationFiled: September 25, 2018Publication date: January 24, 2019Inventors: Ziang CHEN, Jiaming WU, Hao WU, Zhuo CHEN, Qian WANG, Haisheng LEI, Guangtao DONG, Wangwang LIU, Pengfei LI
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Publication number: 20180269806Abstract: A method prevents shoot-through currents and reduces body-diode conduction time in an inverter circuit by changing dead times for transistors in the inverter circuit. A sensing resistor senses temperatures of transistors in the inverter circuit. A delay generator changes delay times in response to receiving the temperatures of the transistors from the sensing resistor. A dead time generation unit changes the dead times for the transistors in response to changes in the delay times.Type: ApplicationFiled: March 15, 2017Publication date: September 20, 2018Inventors: Ziang CHEN, Jun CHEN, Hang Sang LEE
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Patent number: 10075085Abstract: Techniques are provided to tune a gate-drive control signal for a switching device. In an aspect, a device is provided that includes a dead-time generator circuit, a first dead-time tuner circuit and a second dead-time tuner circuit. The dead-time generator circuit generates a control signal for a first switching device that is coupled to a second switching device via a switching node. The first dead-time tuner circuit generates, based on the control signal and a switching signal indicative of a voltage associated with the switching node, a first modified control signal for the first switching device. The second dead-time tuner circuit generates, based on a modified version of the switching signal and a tuning process that repeatedly modifies the control signal until a first dead-time value satisfies a defined criterion, a second modified control signal for the first switching device.Type: GrantFiled: May 23, 2016Date of Patent: September 11, 2018Assignee: THE HONG KONG UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Ziang Chen, Tak Sang Yim, Yat To Wong, Wing Hung Ki
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Publication number: 20180131282Abstract: Techniques are provided to tune a gate-drive control signal for a switching device. In an aspect, a device is provided that includes a dead-time generator circuit, a first dead-time tuner circuit and a second dead-time tuner circuit. The dead-time generator circuit generates a control signal for a first switching device that is coupled to a second switching device via a switching node. The first dead-time tuner circuit generates, based on the control signal and a switching signal indicative of a voltage associated with the switching node, a first modified control signal for the first switching device. The second dead-time tuner circuit generates, based on a modified version of the switching signal and a tuning process that repeatedly modifies the control signal until a first dead-time value satisfies a defined criterion, a second modified control signal for the first switching device.Type: ApplicationFiled: May 23, 2016Publication date: May 10, 2018Inventors: Ziang CHEN, Tak Sang YIM, Yat To WONG, Wing Hung KI
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Publication number: 20160360001Abstract: A method for monitoring health of a server is disclosed. The method is performed by a cache device and includes: acquiring information related to results of health checkups on the server based on an inquiry from a load-balancing device about the results of health checkups on the server; and transmitting the information related to results of the health checkups on the server to the load-balancing device.Type: ApplicationFiled: June 1, 2016Publication date: December 8, 2016Inventors: Qian WANG, Zhuo CHEN, Ziang CHEN, Jiaming WU
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Publication number: 20140308422Abstract: A liquid composite high-intensity sweetener, comprises a sweet substance and a solvent, wherein the sweet substance is one or combination of a plurality of the following components: aspartame, sucralose, acesulfame and neotame; and the solvent comprises water and one or combination of a plurality of the following components: ethanol, propylene glycol, phosphoric acid, citric acid, lactic acid, acetic acid, malic acid, ascorbic acid, glucose acid, tartaric acid, acetate, lactate, citrate, phosphate, sorbic acid, sorbate, benzoic acid and benzoate. In addition, the present invention further claims a method for preparing the liquid composite high-intensity sweetener. The liquid composite high-intensity sweetener not only has sweet taste similar to sucrose and good quality, but also is mixed uniformly without particles remained; the actual requirements of production and consumption are well met.Type: ApplicationFiled: March 19, 2014Publication date: October 16, 2014Applicant: Techno (Fujian) Food Ingredients Co., Ltd.Inventors: Ziang CHEN, Jianheng LI, Can CUI, Juemin SHE, Huirong SU
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Patent number: 8147672Abstract: A process for preparing sucrose-6-ester is provided, which comprises electrolyzing an electrolyte solution containing sucrose, an acylating reagent and a halide catalyst. Also disclosed is a process for preparing sucralose, which involves the preparation and chlorination of sucrose-6-ester followed by deacylation of the molecule. The process of the invention can be more readily performed with a higher yield than those in the art.Type: GrantFiled: March 18, 2011Date of Patent: April 3, 2012Assignee: Techno Food Ingredients Co., Ltd.Inventors: Shaoxiong Li, Ziang Chen, Patrick Deng
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Publication number: 20110168568Abstract: A process for preparing sucrose-6-ester is provided, which comprises electrolyzing an electrolyte solution containing sucrose, an acylating reagent and a halide catalyst. Also disclosed is a process for preparing sucralose, which involves the preparation and chlorination of sucrose-6-ester followed by deacylation of the molecule. The process of the invention can be more readily performed with a higher yield than those in the art.Type: ApplicationFiled: March 18, 2011Publication date: July 14, 2011Inventors: Shaoxiong Li, Ziang Chen, Patrick Deng
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Patent number: 7910727Abstract: A process for preparing sucrose-6-ester is provided, which comprises electrolyzing an electrolyte solution containing sucrose, an acylating reagent and a halide catalyst. Also disclosed is a process for preparing sucralose, which involves the preparation and chlorination of sucrose-6-ester followed by deacylation of the molecule. The process of the invention can be more readily performed with a higher yield than those in the art.Type: GrantFiled: July 17, 2006Date of Patent: March 22, 2011Assignee: Techno (Guangzhou) Food Ingredients Co., Ltd.Inventors: Shaoxiong Li, Ziang Chen, Patrick Deng
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Publication number: 20070227897Abstract: A process for preparing sucrose-6-ester is provided, which comprises electrolyzing an electrolyte solution containing sucrose, an acylating reagent and a halide catalyst. Also disclosed is a process for preparing sucralose, which involves the preparation and chlorination of sucrose-6-ester followed by deacylation of the molecule. The process of the invention can be more readily performed with a higher yield than those in the art.Type: ApplicationFiled: July 17, 2006Publication date: October 4, 2007Inventors: Shaoxiong Li, Ziang Chen, Patrick Deng