Hangzhou Henuova Technology Co., Ltd.

Yuewu Zhang

Qianyi Zhang

Weihua Zha

Jie Luo

Miaoye Li

Junliang Liu

Yanxing Bao

Han Gao

Zirui Wang

Weixing Yang

Jiamin Li

Dongbing Liu

Chao Wang

Ming Xu

Xu Han

Yu Fu

Jianxi Liu

Gang Du

Boyan Zhao

Liwei Qiu

Zuting Cao

Kunpeng Tian

Xueliang Wang

Chicheng Liu

Zhen Lyu

Chen Fan

Xiaohui Cao

Hong Liu

Wen Wei

Weitao Shen

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.

Device and method for detecting inter-turn electromagnetic pulse vibration wave characteristic of turbogenerator rotor winding

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. The device detects state of the conductive screw in a blind area of electromagnetic wave test.

Device and method for nondestructively detecting transient characteristic of conductive screw of turbo-generator rotor

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 wedge.

Device and method for detecting slot wedge, air gap and broken rotor bar in magnetic circuit of electric machinery

Growing community of inventors

Hangzhou, China

Yuewu Zhang