Patents by Inventor Yuewu ZHANG
Yuewu ZHANG 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: 12066491Abstract: A device and method for detecting an inter-turn electromagnetic pulse vibration wave characteristic of a turbogenerator rotor winding are provided. A signal source and a time sequence control circuit generate a high-potential abrupt electric field; circularly polarized electromagnetic waves generated by a parasitic inductive power supply and symmetrically deflecting by 180° are respectively coupled to a positive electrode and a negative electrode clockwise or counter-clockwise; a first turn on the positive electrode and a first turn on the negative electrode are mutually induced; as time goes by, energy is returned to the parasitic inductive power supply, and is sequentially conducted to a second turn; the parasitic inductive power supply and the second turn further start feeding back energy to the first turn in circular polarization; all turns sequentially perform feedback and superposition one another stage by stage; and all coupling turns show sinusoidal waves with a same time constant.Type: GrantFiled: April 15, 2022Date of Patent: August 20, 2024Assignee: HANGZHOU HENUOVA TECHNOLOGY CO., LTD.Inventors: Yuewu Zhang, Kunpeng Tian, Qianyi Zhang, Weihua Zha, Hong Liu, Xiaohui Cao, Xueliang Wang, Dongbing Liu, Jiamin Li, Chicheng Liu, Zhen Lyu, Chen Fan, Miaoye Li, Wen Wei, Zirui Wang
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Publication number: 20240255573Abstract: A device and method for detecting an inter-turn electromagnetic pulse vibration wave characteristic of a turbogenerator rotor winding are provided. A signal source and a time sequence control circuit generate a high-potential abrupt electric field; circularly polarized electromagnetic waves generated by a parasitic inductive power supply and symmetrically deflecting by 180° are respectively coupled to a positive electrode and a negative electrode clockwise or counter-clockwise; a first turn on the positive electrode and a first turn on the negative electrode are mutually induced; as time goes by, energy is returned to the parasitic inductive power supply, and is sequentially conducted to a second turn; the parasitic inductive power supply and the second turn further start feeding back energy to the first turn in circular polarization; all turns sequentially perform feedback and superposition one another stage by stage; and all coupling turns show sinusoidal waves with a same time constant.Type: ApplicationFiled: April 15, 2022Publication date: August 1, 2024Applicant: HANGZHOU HENUOVA TECHNOLOGY CO., LTD.Inventors: Yuewu ZHANG, Kunpeng TIAN, Qianyi ZHANG, Weihua ZHA, Hong LIU, Xiaohui CAO, Xueliang WANG, Dongbing LIU, Jiamin LI, Chicheng LIU, Zhen LYU, Chen FAN, Miaoye LI, Wen WEI, Zirui WANG
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Patent number: 11971452Abstract: A device and a method for nondestructively detecting a transient characteristic of a conductive screw of a turbo-generator rotor are provided. The device includes a personal computer (PC), an extremely-steep pulse generator, an ultra-high-frequency double-isolation transformer, and a pulse emitting and coupling module, which are connected in sequence. The pulse emitting and coupling module is connected to a load. A synchronous pulse receiving non-inductive divider circuit synchronously receives a characteristic waveform from the load, and the synchronous pulse receiving non-inductive divider circuit is connected to an ultra-high-speed analog/digital (A/D) module through a nonlinear saturation amplifying circuit that amplifies a signal. The PC receives a signal from the ultra-high-speed A/D module. The load includes a positive or negative excitation lead loop that is in a 180° symmetrical and instantaneous short-circuit state and a rotor shaft.Type: GrantFiled: April 25, 2021Date of Patent: April 30, 2024Assignee: HANGZHOU HENUOVA TECHNOLOGY CO., LTD.Inventors: Yuewu Zhang, Jianxi Liu, Yanxing Bao, Weihua Zha, Qianyi Zhang, Dongbing Liu, Weixing Yang, Xu Han, Miaoye Li, Zirui Wang, Junliang Liu, Jie Luo, Weitao Shen, Yu Fu, Han Gao
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Patent number: 11933850Abstract: A device for detecting a slot wedge, an air gap and a broken rotor bar is provided, where a sequential circuit generates double concurrent pulses; the sequential circuit is connected to driving power modules; the driving power modules are connected to front-end interface circuits; the front-end interface circuits convert the double concurrent pulses into corresponding magnetic-field pulses; the magnetic-field pulses are transmitted to power supply terminals on adjacent phases of stator windings through impedance matching pins and coupled at a corresponding coil, air gap and squirrel cage rotor to generate single groups of cyclic rotating magnetic potentials; single rotating magnetic potentials are sequentially generated in adjacent slots on each of the phases of the stator windings; rotating electric potentials in magnetic circuits with two symmetrical phases are magnetically coupled to form distributed coupling magnetic field reflected full-cycle waves for reflecting a difference of a corresponding slot wedgType: GrantFiled: August 2, 2021Date of Patent: March 19, 2024Assignee: HANGZHOU HENUOVA TECHNOLOGY CO., LTD.Inventors: Yuewu Zhang, Weixing Yang, Boyan Zhao, Jie Luo, Gang Du, Chao Wang, Han Gao, Liwei Qiu, Ming Xu, Jiamin Li, Yanxing Bao, Qianyi Zhang, Zuting Cao, Junliang Liu
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Publication number: 20240044982Abstract: A device for detecting a slot wedge, an air gap and a broken rotor bar is provided, where a sequential circuit generates double concurrent pulses; the sequential circuit is connected to driving power modules; the driving power modules are connected to front-end interface circuits; the front-end interface circuits convert the double concurrent pulses into corresponding magnetic-field pulses; the magnetic-field pulses are transmitted to power supply terminals on adjacent phases of stator windings through impedance matching pins and coupled at a corresponding coil, air gap and squirrel cage rotor to generate single groups of cyclic rotating magnetic potentials; single rotating magnetic potentials are sequentially generated in adjacent slots on each of the phases of the stator windings; rotating electric potentials in magnetic circuits with two symmetrical phases are magnetically coupled to form distributed coupling magnetic field reflected full-cycle waves for reflecting a difference of a corresponding slot wedgType: ApplicationFiled: August 2, 2021Publication date: February 8, 2024Applicant: HANGZHOU HENUOVA TECHNOLOGY CO., LTD.Inventors: Yuewu ZHANG, Weixing YANG, Boyan ZHAO, Jie LUO, Gang DU, Chao WANG, Han GAO, Liwei QIU, Ming XU, Jiamin LI, Yanxing BAO, Qianyi ZHANG, Zuting CAO, Junliang LIU
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Publication number: 20230168303Abstract: A device and a method for nondestructively detecting a transient characteristic of a conductive screw of a turbo-generator rotor are provided. The device includes a personal computer (PC), an extremely-steep pulse generator, an ultra-high-frequency double-isolation transformer, and a pulse emitting and coupling module, which are connected in sequence. The pulse emitting and coupling module is connected to a load. A synchronous pulse receiving non-inductive divider circuit synchronously receives a characteristic waveform from the load, and the synchronous pulse receiving non-inductive divider circuit is connected to an ultra-high-speed analog/digital (A/D) module through a nonlinear saturation amplifying circuit that amplifies a signal. The PC receives a signal from the ultra-high-speed A/D module. The load includes a positive or negative excitation lead loop that is in a 180° symmetrical and instantaneous short-circuit state and a rotor shaft.Type: ApplicationFiled: April 25, 2021Publication date: June 1, 2023Applicant: HANGZHOU HENUOVA TECHNOLOGY CO., LTD.Inventors: Yuewu ZHANG, Jianxi LIU, Yanxing BAO, Weihua ZHA, Qianyi ZHANG, Dongbing LIU, Weixing YANG, Xu HAN, Miaoye LI, Zirui WANG, Junliang LIU, Jie LUO, Weitao SHEN, Yu FU, Han GAO
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Patent number: 11131712Abstract: A device for inspecting the rotor windings of a generator includes a sequential logic circuit that generates a full-cycle pulse. A high-voltage full-cycle pulse matching generator couples the full-cycle pulse generated by the sequential logic circuit to form a corresponding transient bidirectional rotating magnetic field pulse. The transient bidirectional rotating magnetic field pulse is transmitted to two ends and a large shaft of the generator rotor winding through an impedance-matched connecting line. The transient bidirectional rotating magnetic field pulse generates a resonance effect with each large coil in the rotor. The pulse signal coupling feedback acquisition circuit couples all waveforms reflected by the generator rotor to form a magnetic field waveform, and the magnetic field waveform is transmitted to a data acquisition system by an operational amplifier. A central processing unit transmits a digital information stream to an upper computer.Type: GrantFiled: August 17, 2018Date of Patent: September 28, 2021Assignee: SHANDONG GUTE ELECTRIC CO., LTD.Inventors: Yuewu Zhang, Chicheng Liu, Jingrong Chen, Genyin Wu, Xu Han, Lixin Lu, Juncheng Dong, Yuqing Wei, Kunpeng Tian, Fengjun Wang, Jianxi Liu, Yanxu Sun, Zhen Lv, Jianfeng Sun, Pian Zhang
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Publication number: 20200400746Abstract: A device for inspecting the rotor windings of a generator includes a sequential logic circuit that generates a full-cycle pulse. A high-voltage full-cycle pulse matching generator couples the full-cycle pulse generated by the sequential logic circuit to form a corresponding transient bidirectional rotating magnetic field pulse. The transient bidirectional rotating magnetic field pulse is transmitted to two ends and a large shaft of the generator rotor winding through an impedance-matched connecting line. The transient bidirectional rotating magnetic field pulse generates a resonance effect with each large coil in the rotor. The pulse signal coupling feedback acquisition circuit couples all waveforms reflected by the generator rotor to form a magnetic field waveform, and the magnetic field waveform is transmitted to a data acquisition system by an operational amplifier. A central processing unit transmits a digital information stream to an upper computer.Type: ApplicationFiled: August 17, 2018Publication date: December 24, 2020Applicant: SHANDONG GUTE ELECTRIC CO., LTD.Inventors: Yuewu ZHANG, Chicheng LIU, Jingrong CHEN, Genyin WU, Xu HAN, Lixin LU, Juncheng DONG, Yuqing WEI, Kunpeng TIAN, Fengjun WANG, Jianxi LIU, Yanxu SUN, Zhen LV, Jianfeng SUN, Pian ZHANG
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Patent number: 10634480Abstract: A central point positioning determination device and a central point positioning method thereof for a rotor coil of a large-scale steam turbine generator includes a control device, a pulse acquisition device, and a pulse generation device. The pulse generation device is connected to connection ends of a positive terminal and a negative terminal of the rotor of the generator, and a rotor body of the rotor. The control device controls the pulse generation device to send pulses to the positive terminal, the negative terminal, and the rotor body of the rotor of the generator. By doing so, the central point of the rotor coil can be found conveniently and quickly.Type: GrantFiled: July 26, 2016Date of Patent: April 28, 2020Assignee: SHANDONG GUTE ELECTRIC CO., LTDInventors: Yuewu Zhang, Juncheng Dong, Yuqing Wei, Kunpeng Tian, Pi'an Zhang
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Publication number: 20190368856Abstract: A central point positioning determination device and a central point positioning method thereof for a rotor coil of a large-scale steam turbine generator includes a control device, a pulse acquisition device, and a pulse generation device. The pulse generation device is connected to connection ends of a positive terminal and a negative terminal of the rotor of the generator, and a rotor body of the rotor. The control device controls the pulse generation device to send pulses to the positive terminal, the negative terminal, and the rotor body of the rotor of the generator. By doing so, the central point of the rotor coil can be found conveniently and quickly.Type: ApplicationFiled: July 26, 2016Publication date: December 5, 2019Applicant: SHANDONG GUTE ELECTRIC CO., LTDInventors: Yuewu ZHANG, Juncheng DONG, Yuqing WEI, Kunpeng TIAN, Pi'an ZHANG