low-voltage system 中文意思是什麼
low-voltage system
解釋
低電壓制-
Depend on the comprehensive analysis and study of the structure, principle, and exterior characteristic of the motor, through the methods of system modeling and digital simulation analysis, two kind of control device that work for the low voltage ( lvdc ) and the high voltage ( hvdc ) in avigation are researched respectively. point to the control technique of close - loop speed stabilization at a limited adjustment speed range, we bring out the close - loop speed control method that using the rotor position sensor indirectly measure the speed of the motor
在全面分析了稀土永磁無刷直流電動機的結構特點、工作原理、運行方式以及外部特性的基礎上，通過系統建模和數字模擬分析，分別針對航空低壓直流（ lvdc ）和高壓直流（ hvdc ）兩種電動機構用永磁無刷電動機，在小范圍轉速連續調節下的閉環穩速控制技術進行了詳細理論研究，提出了利用轉子位置傳感器信號間接測量電機轉速進行電機轉速閉環穩速控制的策略。 -
Application study on low - voltage power line carrier wave spread spectrum communication system
低壓電力線載波擴頻通信系統的應用研究 -
Technique of transmitting data via power line （ pl ） ， a new technique developed in recent years ， is used to automatize the free collecting system in public service and the management of uptown service 。 this article discussed the advantage ， disadvantage and the current state of the power line carrier communication 。 the advantage ， method and current state of using spread spectrum technique in power line communication are discussed 。 then the characteristic of low voltage power network was also compendious analyzed 。 in this paper ， after introducing the principle of ssc ， design of hardware and software of the system are been discussed 。 this system has been put into use ， the result has proved its high stability and reliability
本文研究旨在提供一種利用低壓電力供電網路、低成本、高可靠地實現公共事業收費自動化和小區物業管理智能化的技術應用。討論了電力線載波通信的優、缺點及現狀，擴頻技術在電力線載波通信應用的優點、方式和現狀，並對低壓電力線網路的特性進行了簡單的分析。在闡述了擴頻通信的基本原理的基礎上，本文詳細地介紹了電力載波遠程抄表系統的具體實現，包括硬體模塊和管理軟體本系統已投入運行，具有較高的穩定性和可靠性。 -
The functions of this automation system focus on five aspects : data acquisition 、 supervision and control 、 fault isolate and recovery 、 gis 、 data statistic and report. the design project takes the rcs - 9000 series 、 sd ? 9520 and sd - 9630, which is a new installation that can detect the operation state of the low - voltage current breaker, and send the state to the control room. the other new installation is sd - 9860, which is the monitor of the cable fault
設計方案中，在採用南瑞rcs - 9000系列、雙電公司sd - 9520裝置的同時，採用了新開發的sd - 9630塑殼開關運行狀態採集裝置，檢測塑殼開關的運行狀態，並將運行狀態傳回到集控中心（中間站） ；採用了新開發的sd - 9860電纜故障指示器，完成電纜故障的識別；集控中心的設計實現了整個小區配電自動化系統的集中通訊、實時監控、統計與管理功能；高、低壓開關實現了自動控制、狀態檢測和無功補償等。 -
Design and implementation of low voltage power distribution intelligent monitoring system based on isomeric architecture
基於異構體結構的低壓配電智能監控系統設計 -
High - low voltage switch box, dynamic trunk line, mcc, ats, walkie - talkie, broadcasting, fire alarming system, telephone system, etc
電氣：高低壓開關箱動力干線mcc ats對講廣播火警電話等系統。 -
Abstract : abb has developed a new insum system which combines measurement, control, protection and signal treatment. this is a new information technique to applicate in low voltage motor and power control centre. it has the diagnosis, pre - warning and control functions for the process control with increasing reliability
文摘: abb公司開發的新型insum測量、控制、保護和信號處理系統是應用於低壓電機控制中心的新信息技術，它具有診斷、預報警及控制的功能，為此提高了過程式控制制的可靠性。 -
Before the station system commissioning, the low voltage energization test has been done for the hv capacitor banks in ac filters and shunting capacitors
摘要在江陵換流站站系統調試前，對交流濾波器和並聯電容器中的高壓電容器組進行了低壓加壓試驗。 -
This paper mainly focuses on the noise limiting by means of the direct sequence spread spectrum ( dsss ) and the analysis of the transmission performance of the plc and some digital modulation technology. the contents of the paper is as follows : 1 ) the technical feasibility is proved after simulating noise limiting principle of dsss by means of systemview, the simulation software ; 2 ) a kind of band pass filter ( bpf ) is realized according to the requirement of filter and the principle of butterworth approximation, which satisfies the index of performance of dsss. 3 ) the low voltage plc system includes the sc1128, the specific modulation / demodulation ic, the bpf filter and other circuit components, furthermore, the control function of system is realized by means of the personal computer and the microcontroller
本課題在對低壓電力線的傳輸特性和數字調制技術進行分析的基礎上，將通信理論中的直接序列擴頻技術（ dsss ）用於解決低壓電力線通信的干擾問題，主要研究內容如下： （ 1 ）用通信模擬軟體systemview對dsss技術的通信和抗干擾原理進行模擬分析，分別對時域和頻域下採用dsss技術前後接收信號的頻譜進行分析，驗證dsss技術在本系統中的可行性； （ 2 ）由dsss技術對濾波系統的要求，根據濾波理論分析了巴特沃思型濾波器的逼近原理並設計了合適的濾波電路； （ 3 ）用調制解調晶元sc1128和自行設計的濾波器加之輔助外圍電路，構造出低壓電力線載波通信系統，並採用atmel公司的單片機設計了接收和發射電路的微控制器； （ 4 ）分別對採取抗干擾措施前後輸入和輸出信號進行對比實驗，並對結果進行分析，驗證了dsss技術對干擾信號的抑制作用。 -
As a separate system, the system of statistics and analysis for the reliability of low - voltage user records reliability datum of every low - voltage user by gathering terminals, collects and deals with these datum with the technique of low - voltage power line carrier by lumped instrument. last, the datum in the lumped instrument are read in the database of the master station computer by telephone network
低壓用戶可靠性統計與分析系統作為獨立系統，以低壓臺區為單位，通過採集終端記錄每個低壓用戶的可靠性數據，再採用低壓載波由集中裝置對這些數據進行集中並處理，主站計算機以電話網路撥號的方式將集中器中的數據讀入數據庫。 -
The signal sampling circuit fulfill the tasks of sampling signal and changing the double polarities signal to the single polarity signal ; the drive circuit receives the pwm signals from dsp and pass the signals to ipm through optical - couple devices ; the protective circuit safeguard the system against high current, high voltage, low voltage and high temperature on the ipm model
其中信號處理電路主要完成採集輸出電流和中間直流環節電壓信號，並對採集到的電流信號進行極性變換處理的功能；驅動電路接收dsp輸出的高頻驅動信號，通過耦合器件直接驅動ipm模塊；保護電路利用採集到電氣信號對整個系統實施保護，包括過電流、過電壓、欠電壓、 ipm模塊過熱等。 -
A complete solution provided by schneider electric on this project, schneider electric provided the low voltage switchboard, alarm monitoring system, control consoles, emergency engine telegraphy system, general alarm system and fire alarm system and some auxiliaries as a complete package including the design, manufacturing, engineering, factory accept test ( fat ), site commissioning and sea trial
在該項目中，施耐德電氣公司提供了低壓配電板、報警監測系統、監控臺和駕控臺、應急車鐘、通用報警系統和火警系統，以及其它一些輔助設備等的完整總包，它包括了設計、製造、工程、工廠驗收、現場調試和海上試航。 -
This paper presents a new structure orient to unattended low voltage level distribution station automation, and designs corresponding configuring supervisory and control software system
本論文提出一種面向低電壓等級配電所的新型無人值守配電所自動化系統結構，同時，為系統設計相應的具有組態功能的監控系統軟體。 -
In addition, because the geographic environment of the station is complicate, a low voltage distribution station automation supervisory and control system is necessary for power supply & consume departments
此外，由於城市低壓配電所所處的地理環境復雜，針對供電部門的實際需要，需要開發一套低壓配電所自動化監控系統。 -
At present, the product line provided by schneider electric, such as low voltage electric distribution, final low voltage electric distribution, vdi and wd products in merlin gerin brand, as well as the building automation system in tac brand, have covered all the needs in the building electric distribution and automation. with its more personalized design concept and high - tech innovative products, schneider electric will continuously concentrate on the innovation and provide qualified product and service to chinese r. e
目前施耐德電氣旗下的梅蘭日蘭品牌的低壓及低壓終端配電、綜合智能布線、面板開關產品和tac品牌的樓宇自控產品已經涵蓋了樓宇配電和自動化的全部需求，並將不斷創新，以更為人性化的設計理念和更高科技含量的創新產品服務于中國的房地產市場。 -
Sam anlagentechnik engineering gmbh - our products and services are covered into the following ranges : low voltage switchgears, rectifiers and electrical supply system as well as transformer stations and / or inverters, dc / ac converters
Sam anlagentechnik engineering gmbh是一家知名的、誠信的生產商和服務商，該公司提供新型的、專門的產品，例如低壓配電裝置，整流器，變電站，供電設施，振動子換流器、反用換流器、逆變器。 -
Replacement of high voltage switchboards, transformers and low voltage system of the tunnel power supply system in lion rock tunnel, replacement of field equipment of toll collection system in cross - harbour tunnel and replacement of ventilation control panels, exhaust fans, motors and flexible connectors in aberdeen tunnel
更換獅子山隧道供電系統的高壓配電板變壓器和低電壓系統更換海底隧道車輛繳費系統的路面設備及更換香港仔隧道的通風控制屏抽氣扇電動機和軟接頭 -
Till 2000, shanghai mosen technology co. ltd has delivered its low voltage system products and consolidation services in major industrial areas of mainland china
2000年，上海默森科技有限公司，已成為中國大陸地區各知名工業區廠房弱電系統配套供應商。 -
Emphasis of the article is principally assay and compare usual compensative project, for instance : concentrated compensation in transformer substation, compensation of low - voltage system in transformer substation, compensation in distribution circuit, compensation in equipment of user, etc
本文重點分析、比較了配電網常用無功補償方案，如：變電站集中補償、低壓補償、配電線路補償、用電設備補償等。 -
This paper introduced the principle and objective of var compensation, present the model of reactive power optimization planning about low voltage system. according as radiant or other power system, the compensatory capability was gained
論文分析了無功補償的原理和目的，針對當前低壓無功補償的情況，給出了無功補償的離線優化方法，並結合輻射狀電網和非輻射狀電網得出相應的補償容量。
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