Results 21 to 30 of about 450,539 (268)
Lead-carbon battery energy storage system for coal mine ventilator
Gong-kuang zidonghua, 2016 In order to improve reliability of power supply and ensure safety production of coal mine, a lead-carbon battery energy storage system used as emergency power supply for coal mine ventilator was introduced, and system structure, grid access way, system ...
NIU Jianna, ZHOU You, WU Tong
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Design of mine cascade converter with wide input voltage range
Gong-kuang zidonghua, 2022 The converter used in the power supply has problems of low voltage gain, high voltage stress of power tube, non-electrical isolation and complex control.
LIU Yangqing, ZHOU Yuan
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Application of FACTS Devices in Power Supply Systems of Coal Mines [PDF]
E3S Web of Conferences, 2020 In this article, the authors discuss the use of FACTS devices in coal mine power systems. The problems of reactive power compensation and the disadvantages of regulatory and technical documentation regarding the use of modern reactive power compensation ...
Nepsha Fedor +4 more
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China and the Spanish Empire [PDF]
, 1996 Editada en la Fundación Empresa PúblicaEn este artículo argumentamos que Ming China desempeñó un papel fundamental en el auge y decadencia del Imperio español. La demanda china de plata permitió elevados beneficios hasta 1640.
Atwell +50 more
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Design of output filter device of mine-used high-voltage inverter for long-distance power supply
Journal of Physics: Conference Series, 2022 Abstract During the long-distance transmission of the Pulse width modulation ( PWM ) signal of the mine-used inverter, the voltage reflection phenomenon leads to a higher peak voltage at the motor end, which accelerates the insulation aging of the motor and reduces the overall reliability of the system.
openaire +1 more source
Implementation of explosion safety regulations in design of a mobile robot for coal mines [PDF]
, 2018 The article focuses on specific challenges of the design of a reconnaissance mobile robotic system aimed for inspection in underground coal mine areas after a catastrophic event.
Babjak, Ján +5 more
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LiFeO4 battery power supply system for mine auxiliary transportation vehicle
Gong-kuang zidonghua, 2016 For problems of short cycle life and high maintenance cost of existing power supply of domestic mine auxiliary transportation vehicle which uses lead-acid batteries as power supply, the paper proposed application of LiFeO4 battery to the mine vehicle ...
XIAO Nan +4 more
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Study of large capacity power supply used for coal mine emergency facilities
Gong-kuang zidonghua, 2014 In view of problem that common accumulators used in underground coal mine have obvious constraints, the paper analyzed electricity demands of coal mine emergency facilities and characteristics of dry-charged lead-acid battery, developed large capacity ...
LI Meixiang, ZHOU Zhong, ZHANG Yong
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JaxNet: Scalable Blockchain Network [PDF]
, 2020 Today's world is organized based on merit and value. A single global currency that's decentralized is needed for a global economy. Bitcoin is a partial solution to this need, however it suffers from scalability problems which prevent it from being mass ...
Emelyanenko, Taras +3 more
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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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