A detection device for remotely obtaining the health status of an AC switch
A technology of AC switch and detection device, which is applied in the field of power electronics and can solve problems such as susceptibility to strong electromagnetic interference
Active Publication Date: 2019-05-07
武汉天富海科技发展有限公司
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[0010] Aiming at the defects of the prior art, the purpose of the present invention is to provide a detection device for remotely obtaining the health status of the AC switch, aiming at solving the problem of strong electromagnetic interference in the prior art when acquiring the health status of the AC switch for long-distance transmission. technical problem
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[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0032] The invention belongs to power electronics technology, and specifically relates to a detection device for remotely obtaining the health status of an AC switch. The electrical signal reflecting whether the AC switch is turned on and the electrical signal reflecting whether the AC switch is overheated are converted into optical signals respectively. , using optical fiber (cable) as the transmission medium, which solves the technical problem of being susceptible to strong electromagnetic interference when obtaining the long-distance transmission of the health status of the AC switch in the power...
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The invention provides a detection device for remotely obtaining the health condition of an alternating current (AC) switch, including a temperature sensing unit, a twisted pair, a sampling circuit, an opto-isolator processing circuit, a temperature subsequent processing circuit, an electro-optic conversion circuit, a transmission unit, an photoelectric conversion circuit and a data collector. The sampling circuit is used for timely collecting a trigger pulse. The opto-isolator processing circuit is used for subjecting the trigger pulse to level switch. The temperature subsequent processing circuit is used for converting a current signal to obtain a voltage signal which can reflect the cold plate temperature of the AC switch. The electro-optic conversion circuit is used for converting a trigger pulse voltage signal of the AC switch and the voltage signal which can reflect the cold plate temperature of the AC switch into remotely-transmitted optical signals respectively. The photoelectric conversion circuit is used for converting an optical signal into an electric signal. The data collector is used for timely collecting the electric signal, and obtaining the health condition of the operating AC switch according to an electric signal which reflects the cold plate temperature of the AC switch and an electric signal of the trigger pulse.
Description
technical field [0001] The invention belongs to the technical field of power electronics, and more particularly relates to a detection device for remotely acquiring the health status of an AC switch. Background technique [0002] At present, high-power power electronic devices represented by SCR (phase-controlled thyristor), IGBT (insulated gate bipolar transistor), and IGCT (integrated gate commutated thyristor) replace traditional vacuum switches, gas switches, and liquid switches to build large-scale Capacitive AC switches, which are widely used in pulse power conversion devices, have been industrialized, which greatly promotes the development of pulse power conversion devices (equipment) towards high voltage, strong current, and steep pulse. [0003] During the working period of the power electronic pulse power conversion device (equipment), if it is not known whether the AC switch is triggered and turned on, it will be very dangerous, especially in some military occasio...
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IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 屈碧环
Owner 武汉天富海科技发展有限公司