earth-current system 中文意思是什麼
earth-current system
解釋
大地電流測量系統-
The protection system can deal with the following motor faults : heavy over - current, over / under - voltage, over - current, current unbalance protection, repeated startings, earth fault and so on
在此基礎上實現了針對過載、堵轉、短路、斷相、逆相、相不平衡等故障的保護。 -
This paper is focused on the operation of single - phase earthprotection for little earth current system. based on the analyses for several kinds of ground protections, one ground protection with the functions of line selection and ground positioning is proposed for the complex automatic and mordern management for the electric substation. by this means, the economic, reliability, safty and stable operation for the grid can be achieved
針對小接地電流系統單相接地保護的運行進行了論述，並分析比較了幾種目前採用的小接地電流系統單相接地保護的功能及優缺點，建議採用一種既能選線又能定位的小接地電流系統單相接地保護裝置，以適應綜合自動化和現代化管理的需要，確保系統經濟、可靠、安全、穩定運行。 -
The company serves content around project early days, metaphase, later period each phase, cover earth to build, each major such as adornment, installation, municipal, gardens, traffic, irrigation works ; especially : service of representative of invite public bidding permeates reconnaissance, design, inspect manage, construction, equipment, material, purchase wait for each domain ; cost seeks advice use current the most advanced tsinghua si weier is three - dimensional system of software calculating an amount, control to the project executes the spot to be mirrorred in real time and undertaking cost dogs ; the adroitness in project management uses fidic term and conditions of contract, the mature construction on international project management pattern introduces in management of domestic construction project ; company of software of subordinate path be in harmony is with advanced science and technology rely on, foot of client of prep close behind leads the market, dedicated the development at project software, apply with promotion
公司服務內容圍繞工程建設前期、中期、後期各階段，涵蓋土建、裝飾、安裝、市政、園林、交通、水利等各專業；特別是：招標代理服務滲透到勘察、設計、監理、施工、設備、材料、采購等各領域；造價咨詢採用當前最先進的清華斯維爾三維算量軟體系統，對工程實行現場實時反映並進行造價跟蹤控制；項目管理中熟練運用fidic合同條件，將國際上成熟的建設項目管理模式引入到國內建設項目管理中；下屬道融軟體公司以先進科技為依託，緊隨客戶步調引領市場，專注于工程建設軟體的開發、運用與推廣。 -
Crew members using the current toilet system on the russian side must transfer tanks of their urine to a cargo ship, which burns up in earth ' s atmosphere once undocked from the station
大空人目前所使用的俄方的廁所，必需把尿桶送到貨艙，當太空梭離開太空站重返大氣層時銷毀。 -
In this dissertation, a novel drive system used in electromotion chair, rare earth permanent magnet brushless direct current machine ( repm bldcm ) drive system is proposed, which is provided background by ministry of nation science and technology " shiwu " programming momentous critical item - rare earth application project item - direct current brushless superior reliability rare earth permanent magnet machines
本論文以國家科技部「十五」重大攻關項目? ?稀土應用工程項目之直流無刷高可靠稀土永磁電機為研究背景，結合課題要求，進行了充分的市場調研，確定了論文研究的主要內容為電動座椅用稀土永磁無刷直流電動機驅動系統。 -
Improvement of single - phase direct earth capacitance current for power distribution system in coal mine
煤礦供電系統單相接地電容電流的治理 -
First part reviews the study achievements on the man - earth relationship. on the basis of the introduction of the main concepts relative to the man - earth relationship system, this part reviews the current literature on this subject, delineate the ideological thread that runs through development of the man - earth relationship both in china and in the western countries, and summarizes its study content, character, structure, function and effect factors and so on
第一部分，綜述有關人地關系研究成果，在介紹有關基本概念的基礎上，對區域人地關繫系統的研究文獻進行相關評述，對國內外人地關系的思想變遷進行了梳理，並概述了人地關繫系統的研究內容、特徵、結構、功能及其影響因素等。 -
And this paper structures the emulation model of 10kv transformer substation by utilizing matlab toolbox, emulations the fault course when single - phase ground fault occurs in the small current earth system. and validates the validity of the " gradual identifying law "
並利用matlab工具箱構建10kv變電站模擬模型，對中性點不接地和經消弧線圈接地系統在不同故障情況下的故障過程進行了模擬，進而驗證了「遞進信息法」的正確性。 -
The project studied in this dissertation is from the " shiwu " critical investigation item of national science and technology ministry. on the background of power bed high quality rare earth permanent magnet brushless direct current motor ( repm bldcm ) system is researched and developed
本文研究課題來源於國家科技部「十五」攻關項目，是以電動床為應用背景，研究開發高性能稀土永磁無刷直流電動機系統。 -
In the design of real - time control system, the paper takes three - phase full - bridge mosfet inverter as the real - time control main circuit, and adopts a control scheme with 120 ? switching mode combined with half - bridge pulse width modulation ( pwm ), which would avoid straightthrough short of a certain bridge. phase current is detected by single current sensor ; three - phase position signals generated by position sensors could not only supply commutation information for inverter, but also be used for speed detecting based on signals " period measurement, which makes the speed sensor unnecessary. the whole control system adopts speed and current dual closed - loop control strategy in order to construct a high performance rare - earth permanent magnetic brushless dc motor ( repm bldcm ) full - digital real - time control system
在實時控制系統的設計中，本文以三相全橋mosfet逆變電路作為實時控制主電路，採用120導通方式結合半橋pwm調制的控制方案，從而有效地避免了橋臂的直通短路；本文用單電流傳感器實現對相電流的檢測，來自位置傳感器的三相位置信號不僅為逆變電路提供換相信息，而且也用於基於信號周期測量的轉速檢測，這樣就省去了速度傳感器；系統採用的是速度、電流雙閉環控制策略，力求構建高性能的稀土永磁無刷直流電動機全數字實時控制系統。
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