scholarly journals The Study on Simulation of Resistance in Stall Motor

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Run Xu ◽  
Zhiqiang Chen
Keyword(s):  
Maximum Property ◽  
Electrical State ◽  
Stall Force

The stall phenomenon which happens in loaded motor is unqualification in application. Meanwhile it may measure the maximum property of motor in manufacture. So the phenomenon is analyzed to find a simulation of electrical state to predict the maximum currency and torque which is a necessary method to be proceeded up to now before design. We find that the simulation fits well to the reference. The conditions of t=60s,U=22V result in the biggest stall force according to rotation to change time and voltage. Then it is t=90s,U=17V; t=30s,U=27V and t=120s,U=12V in turns. As for torque it is t=30s,U=27V; t=60s,U=22V;t=90s,U=17V and t=120s,U=12V in truns.

scholarly journals Manifestations of global disturbances of the geomagnetic field in dynamics of thunderstorms

2021 ◽  
pp. 174-188
Author(s):  
Н.С. Хаердинов ◽  
Д.Д. Джаппуев ◽  
К.Д. Канониди ◽  
А.У. Куджаев ◽  
А.С. Лидванский ◽  
...  
Keyword(s):  
Mutual Influence ◽  
Thunderstorm Activity ◽  
Ionospheric Disturbances ◽  
North Caucasus ◽  
Expansion Phase ◽  
Air Shower ◽  
Secondary Particles ◽  
Electrical State ◽  
Diffuse Glow ◽  
Shower Array

Используя метод диагностики электрического состояния грозовой атмосферы по вариациям вторичных частиц космических лучей, регистрируемых установкой «Ковёр» БНО ИЯИ РАН, обнаружено явление взаимного влияния магнитосферной бури и грозовой активности. Установлено, что во время магнитосферных суббурь малой мощности, на предварительной стадии и в начале фазы развития, возможно проникновение магнитосферно — ионосферных возмущений на средние широты (∼40° с.ш.) над грозовыми очагами. Этот эффект проявляется в виде диффузного свечения типа «полярное сияние» яркостью ∼3 ·10-4 кд·м-² и локальных возмущений электрического поля с характерной разностью потенциалов в тропосфере ±100 МВ. Зарегистрировано локальное магнитное возмущение (∼1 нТл), соответствующее возникновению локального вертикального тока в атмосфере, максимум которого совпал с началом взрывной фазы зарождения суббури. Using the method of diagnosing the electrical state of a thunderstorm atmosphere by variations of the secondary particles of cosmic rays recorded by the Carpet air shower array of the Baksan Neutrino Observatory (North Caucasus), the phenomenon of the mutual influence of a magnetic storm and thunderstorm activity was discovered. It has been established that during magnetic substorms of low power, at the preliminary stage and at the beginning of the development phase, penetration of magnetospheric–ionospheric disturbances at mid latitudes (∼400 N) above lightning centers is possible. This effect manifests itself in the form of a diffuse glow of the aurora type with a brightness of ∼3 ·10-4 cd·m-² and local disturbances of the electric field with a characteristic potential difference in the troposphere of order of  ±100 MV. A local magnetic disturbance (∼ 1 nT) was recorded, corresponding to the appearance of a local vertical current in the atmosphere, whose maximum coincided with the beginning of the expansion phase of substorm nucleation.

scholarly journals Stall force of polymerizing microtubules and filament bundles

2011 ◽  
Vol 93 (2) ◽  
pp. 28006 ◽  
Author(s):  
J. Krawczyk ◽  
J. Kierfeld
Keyword(s):  
Filament Bundles ◽  
Stall Force

scholarly journals Upgrade of the YerPhI polarization Lidar System for using Polarization of the Elastic and Raman Backscattered Beams

2019 ◽  
Vol 197 ◽  
pp. 03005
Author(s):  
A. Ghalumyan ◽  
K. Apresyan ◽  
A. Chilingaryan ◽  
V. Ghazaryan
Keyword(s):  
Electric Fields ◽  
Gamma Ray ◽  
Beam Polarization ◽  
Lidar System ◽  
Density Profiles ◽  
Electrical Fields ◽  
Polarized Beams ◽  
Electrical State ◽  
Atmospheric Backscatter ◽  
Telescope System

A powerful two-frequency lidar system using polarized beams has been developed at YerPhI. The system is completed with laser beam polarization changers and nitrogen and water Raman channels for investigation of the influence of atmospheric electric fields on the elastic and Raman backscattered beams polarization. At present, the system is being tuned for measuring vertical atmospheric backscatter profiles of aerosols and hydrometeors, analyze the depolarization ratio of elastic backscattered laser beams and investigate the influence of external factors on the beam polarization. Laser light that is reflected from the air and from clouds carries information on density profiles, aerosols and electrical fields. Applications of this system will be the investigation of the electrical state of the atmosphere during thunderstorms [1-3] on Mt Aragats, and, possibly the monitoring of the atmosphere at the site of the upcoming Cherenkov Telescope Array (CTA). CTA is expected to provide unprecedented sensitivity for gamma ray detection in the energy range of 30 GeV to 300 TeV. To fully exploit the potential of the telescope system it is important to characterize the optical and electrical properties of the atmosphere. A lidar system for the continuous monitoring of the atmosphere is the tool of choice.

scholarly journals Connected Variations of Meteorological and Electrical Quantities of Surface Atmosphere under the Influence of Heavy Rain

Atmosphere ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 1195
Author(s):  
Vladimir Kalchikhin ◽  
Alexey Kobzev ◽  
Petr Nagorskiy ◽  
Mariya Oglezneva ◽  
Konstantin Pustovalov ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Surface Layer ◽  
Heavy Rainfall ◽  
Atmospheric Precipitation ◽  
Heavy Rain ◽  
Air Masses ◽  
Surface Atmosphere ◽  
Synoptic Conditions ◽  
Electrical State ◽  
Atmospheric Phenomena

The electrical state of the surface atmosphere changes significantly under the influence of cloudiness and atmospheric phenomena, including atmospheric precipitation. These features can be used for possible diagnostics of precipitation and improvement of their characteristics based on variations of atmospheric-electrical quantities in the surface layer. Studies of variations of meteorological and atmospheric-electrical quantities in the surface layer were carried out during the heavy rainfall associated with the cumulonimbus (Cb) clouds passage. Meteorological and atmospheric-electrical observations in the Geophysical Observatory of the Institute of Monitoring of Climatic and Ecological Systems are presented in this paper. Precipitation data are used to identify periods of heavy rainfall ≥ 5 mm/h. Information of weather stations and satellites is used to separate the heavy rainfall events by synoptic conditions like thunderstorms and showers of frontal or internal air masses. We find that rains associated with the frontal Cb clouds produce more abrupt changes in negative electrical conductivity in comparison with the Cb clouds in internal air masses. The significant increase in negative electrical conductivity (more than two times vs. normal values) occurs typically during the passage of frontal Cb and heavy rain with droplet size greater than 4 mm.

scholarly journals Investigations on the electrical state of the upper atmosphere

1909 ◽  
Vol 43 (196) ◽  
pp. 216-216
Author(s):  
W. Makower ◽  
Margaret White ◽  
E. Marsden
Keyword(s):  
Upper Atmosphere ◽  
Electrical State
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