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Design of quasi-resonant flyback secondary intrinsically safe power supply [PDF]
Archives of Electrical Engineering, 2019 In order to improve the efficiency and ensure the security of power supply used in a mine, this paper mainly studies the quasi-resonant flyback secondary power supply and analyzes its operational principles based on the requirements of soft-switching ...
Shengnan Lu, Bin Wang
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Design of high-power intrinsically safe power supply based on fault current change rate
Gong-kuang zidonghua, 2021 In order to solve the problems of low output power, poor protection effect, and slow dynamic response speed of existing intrinsically safe power supply, a high-power intrinsically safe power supply based on fault current change rate is designed.
KANG Qian +3 more
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Long Distance Intrinsically Safe Power Supply Technology in Coal Mines
Meikuang Anquan, 2020 Based on the problem of weak remote power supply capacity of intrinsically safe power supply in coal mines, according to the centralized power supply mode of point-to-point power supply in the field, this paper analyzes the fault phenomenon caused by ...
LIU Yahui
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A testing device for intrinsically safe multi-circuit protection power supply
Gong-kuang zidonghua, 2018 In order to solve problems of inconvenient operation, complicated process and low accuracy of existing test methods of intrinsically safe power supply, a testing device for intrinsically safe multi- circuit protection power supply was designed.
REN Gaojian +3 more
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Design of mine-used intrinsically safe remote relay power supply
Gong-kuang zidonghua, 2016 In order to satisfy long-distance transmission requirements of sensor used on underground super long working face, a mine-used intrinsically safe remote relay power supply was designed.
LIN yi
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Design of a high-performance mine-used intrinsically safe power supply
Gong-kuang zidonghua, 2019 For problems of poor electromagnetic immunity and weak load capacity of current intrinsically safe power supply, a high-performance mine-used intrinsically safe power supply was designed.
HUANG Hesong +3 more
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Advances in Transdisciplinary Engineering, 2023 Radio wave penetration is currently one of the most effective technical means for detecting geological anomalies. With the increase in width of the working surface, the penetration distance of commercially available detection instruments cannot meet the needs of detecting the working surface over 200m.
Li, Yunbo, Peng, Hongling
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Design of novel intrinsically safe power supply with 'ia' grade
Gong-kuang zidonghua, 2017 According to working condition of mine-used power supply in coal mine underground, novel intrinsically safe power supply with 'ia' grade was designed. The power supply uses a fully enclosed AC-DC module to eliminate special flameproof enclosure, and has ...
YU Zhixue, FANG Xupeng, ZHAO Yang
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A novel chopping current protection circuit for intrinsically safe power supply
Gong-kuang zidonghua, 2016 For problems that traditional chopping current protection circuit had small cut-off current value and poor anti load impact ability, and needed additional recovery circuit or manual circuit after over-current fault, a novel chopping current protection ...
FANG Xupeng +4 more
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Research on transient energy suppression strategy of intrinsically safe output power supply for mine
Meikuang AnquanIn response to the requirements of GB/T 3836.4—2021 Explosive atmosphere Part 4: Equipment with protection by intrinsic safety “i” for outputting transient energy of intrinsically safe power sources based on the principle of semiconductor rapid short ...
Changna GUO
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