Patents by Inventor Jianfei Zheng

Jianfei Zheng 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).

  • Publication number: 20200280266
    Abstract: A control method of a multilevel converter includes: classifying power modules that start working, need to update an output state or stop working to form m power module groups; and controlling power modules in a same one of the power module groups to start working, update the output state or stop working at the same time, and sequentially controlling the m power module groups to start working, or update the output state or stop working, according to a preset time interval. The number of power modules in each power module group is less than or equal to a preset value, causing a change value of an output level of the each power module group to be less than or equal to a preset voltage value.
    Type: Application
    Filed: February 27, 2020
    Publication date: September 3, 2020
    Applicant: Delta Electronics (Shanghai) CO., LTD
    Inventors: Jianping YING, Wei XIE, Lan WEI, Jianfei ZHENG, Bingjie LIU, Dingkun SHEN, Zhiming HU, Wei XU, Yang LIU
  • Publication number: 20200248705
    Abstract: A cross-flow impeller mounting structure, an air duct component and an apparatus having a cross-flow impeller.
    Type: Application
    Filed: August 20, 2018
    Publication date: August 6, 2020
    Inventors: Xiaobo HU, Tuchun SUN, Jianfei HOU, Hai YANG, Yabo HU, Zhiyong JIANG, Li ZENG, Bowen ZHENG
  • Publication number: 20200080993
    Abstract: The present invention provides a reagent mixing device, which comprises a driving device, a transport device and a rotating part, wherein the transport device comprises a conveying mechanism for conveying a reagent kit and a mixing mechanism for mixing a reagent; the conveying mechanism is driven by the driving device to move relative to the mixing mechanism; the rotating part and mixing mechanism are in transmission matching; the conveying mechanism and the mixing mechanism are sleeved with each other to form a bearing structure. The present invention further provides a reagent mixing method. The reagent mixing device is small in size, smart in structure, easy to assemble and low in manufacturing cost. The reagent mixing method provided by the present invention is simple and reliable, high in overall operation reliability, and has very high application values in such analysis and test fields as full-automatic chemiluminescence immunoassay analyzers and biochemical analyzers.
    Type: Application
    Filed: November 11, 2019
    Publication date: March 12, 2020
    Applicant: Leadway (HK) Limited
    Inventors: Hao ZHANG, Yigang YANG, Jianfei ZHENG, Gang WU
  • Patent number: 10473650
    Abstract: The present invention provides a reagent mixing device, which comprises a driving device, a transport device and a rotating part, wherein the transport device comprises a conveying mechanism for conveying a reagent kit and a mixing mechanism for mixing a reagent; the conveying mechanism is driven by the driving device to move relative to the mixing mechanism; the rotating part and mixing mechanism are in transmission matching; the conveying mechanism and the mixing mechanism are sleeved with each other to form a bearing structure. The present invention further provides a reagent mixing method. The reagent mixing device is small in size, smart in structure, easy to assemble and low in manufacturing cost. The reagent mixing method provided by the present invention is simple and reliable, high in overall operation reliability, and has very high application values in such analysis and test fields as full-automatic chemiluminescence immunoassay analyzers and biochemical analyzers.
    Type: Grant
    Filed: March 1, 2017
    Date of Patent: November 12, 2019
    Assignee: LEADWAY (HK) LIMITED
    Inventors: Hao Zhang, Yigang Yang, Jianfei Zheng, Gang Wu
  • Patent number: 10294696
    Abstract: A locking mechanism for a tank body and a tank cover of a pressure tank. The locking mechanism includes: a tank body, a tank chamber, a tank cover, a hydraulic cylinder, a locking ring, a spring cylinder, a fixing supporting mechanism, a fixing plate, a barb, a notch, and a pulling cylinder.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: May 21, 2019
    Assignee: Amsted Rail Company, Inc.
    Inventors: Yuepeng Zheng, Yue Zuo, Rizhuo Bai, Sijin Zhang, Chengqun Yan, Zhongxian Du, Jianfei Sun, Fuyang Cao, Dongye Yang
  • Patent number: 10164515
    Abstract: A driving method for power semiconductor switches in an H-bridge circuit is provided. The method includes: calculating a start time and an end time of a zero level of an output voltage and determining a zero level section based on the start time and end time of the zero level; and driving an upper power semiconductor switch of a first bridge arm and an upper power semiconductor switch of a second bridge arm to be on simultaneously or driving a lower power semiconductor switch of the first bridge arm and a lower power semiconductor switch of the second bridge arm to be on simultaneously in the zero level section.
    Type: Grant
    Filed: February 7, 2018
    Date of Patent: December 25, 2018
    Assignee: Delta Electronics (Shanghai) Co., Ltd.
    Inventors: Wei Xu, Dingkun Shen, Jianfei Zheng, Jianping Ying, Zhiming Hu, Wei Tian, Wei Xie, Lan Wei
  • Patent number: 10148164
    Abstract: A topology of composite cascaded high-voltage and low-voltage modules is provided. It includes at least one high-voltage module, at least one low-voltage module, at least one local control circuit and at least one DC-to-DC module. At least one high-voltage module is connected with at least one low-voltage module in cascade manner. At least one local control circuit outputs at least one signal to at least one high-voltage driving circuit and at least one low-voltage driving circuit. An input of at least one DC-to-DC module is connected with two ends of a low-voltage bus capacitor, for receiving a low-voltage DC bus voltage and converting the low-voltage DC bus voltage into a DC output voltage, so as to provide one or more of at least one high-voltage driving circuit, at least one low-voltage driving circuit and at least one local control circuit with a power supply.
    Type: Grant
    Filed: February 5, 2018
    Date of Patent: December 4, 2018
    Assignee: Delta Electronics (Shanghai) Co., Ltd.
    Inventors: Jianping Ying, Zhiming Hu, Wei Tian, Wei Xu, Jianfei Zheng
  • Patent number: 10075057
    Abstract: A hybrid topology power converter includes a three-level circuit module and a cascaded H-bridge circuit module. A control method includes the following steps. Firstly, a zero sequence component is injected into a total modulation wave, thereby generating a compensated total modulation wave. Then, a first voltage signal is generated according to the compensated total modulation wave. An H-bridge modulation wave is generated according to the compensated total modulation wave and the first voltage signal. A three-level driving signal is generated according to the first voltage signal, and an H-bridge driving signal is generated according to the H-bridge modulation wave. A duty cycle of at least one switch element of the three-level circuit module is adjusted according to the three-level driving signal. A duty cycle of at least one switch elements of the cascaded H-bridge circuit module is adjusted according to the H-bridge driving signal.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: September 11, 2018
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Dingkun Shen, Jianfei Zheng, Wei Xu, Jianping Ying, Lan Wei, Zhiming Hu
  • Publication number: 20180252707
    Abstract: The present invention provides a reagent mixing device, which comprises a driving device, a transport device and a rotating part, wherein the transport device comprises a conveying mechanism for conveying a reagent kit and a mixing mechanism for mixing a reagent; the conveying mechanism is driven by the driving device to move relative to the mixing mechanism; the rotating part and mixing mechanism are in transmission matching; the conveying mechanism and the mixing mechanism are sleeved with each other to form a bearing structure. The present invention further provides a reagent mixing method. The reagent mixing device is small in size, smart in structure, easy to assemble and low in manufacturing cost. The reagent mixing method provided by the present invention is simple and reliable, high in overall operation reliability, and has very high application values in such analysis and test fields as full-automatic chemiluminescence immunoassay analyzers and biochemical analyzers.
    Type: Application
    Filed: March 1, 2017
    Publication date: September 6, 2018
    Inventors: Hao ZHANG, Yigang YANG, Jianfei ZHENG, Gang WU
  • Publication number: 20180248467
    Abstract: A driving method for power semiconductor switches in an H-bridge circuit is provided. The method includes: calculating a start time and an end time of a zero level of an output voltage and determining a zero level section based on the start time and end time of the zero level; and driving an upper power semiconductor switch of a first bridge arm and an upper power semiconductor switch of a second bridge arm to be on simultaneously or driving a lower power semiconductor switch of the first bridge arm and a lower power semiconductor switch of the second bridge arm to be on simultaneously in the zero level section.
    Type: Application
    Filed: February 7, 2018
    Publication date: August 30, 2018
    Inventors: Wei XU, Dingkun SHEN, Jianfei ZHENG, Jianping YING, Zhiming HU, Wei TIAN, Wei XIE, Lan WEI
  • Publication number: 20180248468
    Abstract: A topology of composite cascaded high-voltage and low-voltage modules is provided. It includes at least one high-voltage module, at least one low-voltage module, at least one local control circuit and at least one DC-to-DC module. At least one high-voltage module is connected with at least one low-voltage module in cascade manner. At least one local control circuit outputs at least one signal to at least one high-voltage driving circuit and at least one low-voltage driving circuit. An input of at least one DC-to-DC module is connected with two ends of a low-voltage bus capacitor, for receiving a low-voltage DC bus voltage and converting the low-voltage DC bus voltage into a DC output voltage, so as to provide one or more of at least one high-voltage driving circuit, at least one low-voltage driving circuit and at least one local control circuit with a power supply.
    Type: Application
    Filed: February 5, 2018
    Publication date: August 30, 2018
    Inventors: Jianping YING, Zhiming HU, Wei TIAN, Wei XU, Jianfei ZHENG
  • Patent number: 9882502
    Abstract: A pre-charge control method for a hybrid multilevel power converter comprises steps of: (a) controlling access of the current-limiting resistor unit, limiting current from the AC power via the current-limiting resistor unit, and outputting the current; (b) controlling the second capacitor unit to bypass, and charging the first capacitor unit; (c) controlling the access of the second capacitor unit when the first capacitor unit is charged to a third preset voltage, and charging the first and second capacitor units at the same time; (d) controlling the first capacitor unit to bypass when the second capacitor unit is charged to a fourth preset voltage, or the first capacitor unit is charged to a first preset voltage, and charging the second capacitor unit; and (e) controlling the access of the first capacitor units and the current-limiting resistor unit to bypass when the second capacitor unit is charged to a second preset voltage.
    Type: Grant
    Filed: January 5, 2017
    Date of Patent: January 30, 2018
    Assignee: Delta Electronics (Shanghai) Co., LTD.
    Inventors: Wei Xie, Jianfei Zheng, Dingkun Shen, Lan Wei, Jianping Ying, Zhiming Hu, Wei Xu, Wei Tian
  • Publication number: 20170317576
    Abstract: A hybrid topology power converter includes a three-level circuit module and a cascaded H-bridge circuit module. A control method includes the following steps. Firstly, a zero sequence component is injected into a total modulation wave, thereby generating a compensated total modulation wave. Then, a first voltage signal is generated according to the compensated total modulation wave. An H-bridge modulation wave is generated according to the compensated total modulation wave and the first voltage signal. A three-level driving signal is generated according to the first voltage signal, and an H-bridge driving signal is generated according to the H-bridge modulation wave. A duty cycle of at least one switch element of the three-level circuit module is adjusted according to the three-level driving signal. A duty cycle of at least one switch elements of the cascaded H-bridge circuit module is adjusted according to the H-bridge driving signal.
    Type: Application
    Filed: April 26, 2017
    Publication date: November 2, 2017
    Inventors: Dingkun Shen, Jianfei Zheng, Wei Xu, Jianping Ying, Lan Wei, Zhiming Hu
  • Publication number: 20170294847
    Abstract: A pre-charge control method for a hybrid multilevel power converter comprises steps of: (a) controlling access of the current-limiting resistor unit, limiting current from the AC power via the current-limiting resistor unit, and outputting the current; (b) controlling the second capacitor unit to bypass, and charging the first capacitor unit; (c) controlling the access of the second capacitor unit when the first capacitor unit is charged to a third preset voltage, and charging the first and second capacitor units at the same time; (d) controlling the first capacitor unit to bypass when the second capacitor unit is charged to a fourth preset voltage, or the first capacitor unit is charged to a first preset voltage, and charging the second capacitor unit; and (e) controlling the access of the first capacitor units and the current-limiting resistor unit to bypass when the second capacitor unit is charged to a second preset voltage.
    Type: Application
    Filed: January 5, 2017
    Publication date: October 12, 2017
    Inventors: Wei Xie, Jianfei Zheng, Dingkun Shen, Lan Wei, Jianping Ying, Zhiming Hu, Wei Xu, Wei Tian
  • Patent number: 9140744
    Abstract: Provided is a doubly-fed induction generator system and a self-test method for the active crowbar circuit of the doubly-fed induction generator system. The invention is featured by using the controller of the doubly-fed induction generator system to carry out a self-test procedure to detect the loop current of the active crowbar circuit for determining if the active crowbar circuit can be turned on and off normally. Also, the rotor-side converter and the active crowbar circuit of the doubly-fed induction generator system are forbidden to turn on simultaneously during the execution of the self-test procedure.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: September 22, 2015
    Assignee: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Jianfei Zheng, Fei Lu, Zhi Li, Aibin Qiu
  • Publication number: 20130027003
    Abstract: Provided is a doubly-fed induction generator system and a self-test method for the active crowbar circuit of the doubly-fed induction generator system. The invention is featured by using the controller of the doubly-fed induction generator system to carry out a self-test procedure to detect the loop current of the active crowbar circuit for determining if the active crowbar circuit can be turned on and off normally. Also, the rotor-side converter and the active crowbar circuit of the doubly-fed induction generator system are forbidden to turn on simultaneously during the execution of the self-test procedure.
    Type: Application
    Filed: May 15, 2012
    Publication date: January 31, 2013
    Applicant: DELTA ELECTRONICS (SHANGHAI) CO., LTD.
    Inventors: Jianfei Zheng, Fei Lu, Zhi Li, Aibin Qiu