frequency relay 中文意思是什麼
frequency relay
解釋
調振式繼電器-
The main features of the apparatus are focus on small volume, light weight, no iron core, no magnetic saturation and no ferreous resonance, moreover, related advantages such as the large range of transient and frequency response, excellent electrical magnetic compatibility, oil - free configuration, reliable insulation structure, are all the trends of current transformer in the future. meanwhile, it should agree with the future power gauge and digital, computer, automatic relay protection. it will meet the demand of digital power network
它具有體積小、重量輕；無鐵芯、不存在磁飽和與鐵磁諧振問題；動態響應范圍大，頻率響應寬；抗電磁干擾性能強；無油化結構、絕緣可靠、價格低等優點；是未來電流互感器發展的方向，是新一代電力數字網發展的需要，適應電力計量和保護數字化、微機化和自動化發展的潮流。 -
Capacity series and radio - frequency channel arrangement for analog microwave relay systems
模擬微波接立通信系統容量系列及波道配置 -
Both of the protection use high frequency distance or directional protection as main protection, and use distance protection adding current protection as reserving protection. this dispositon assured relay protection ' s four features : election, sensitivity, instancy and reliability
每套保護大多以高頻距離、高頻方向保護作為快速切除區內故障的主保護，而以距離保護和零序保護作為后備保護，保證了繼電保護的選擇性、靈敏性、快速性、可靠性。 -
The high permeability of the ferromagnetic reeds in a reed relay causes a pronounced skin effect with increasing signal frequency
干簧式繼電器中鐵磁簧片的高磁導率會隨信號頻率的增加而產生很強的趨膚效應。 -
The over - current relay works to protect oscillation tubes and rectifier, when the current exceeds its limits. frequency deviation caused by faulty operation is also prevented
當電流超過限制值時，過負荷電流繼電器自動保護振蕩管和整流器，同時可以避免由不當操作所引起的頻率漂移。 -
The high-frequency relay can be replaced by the circuit in accordance with fig. 4-10(b).
高頻繼電器可以用與圖4-10（b）一致的電路來代替。 -
Abstract : this paper introduces the unavoidable disadvantages of the the marine cargo crane ' s relay - contactor control system and the utilizing of the programmable logic controller （ plc ） and frequency conversion control technology for the marine cargo crane, and describes the main features of the marine cargo crane ' s frequency conversion control system with programmable logic controller such as energy economization and reliable protection
文摘:介紹了傳統的船用起貨機繼電器?接觸器控制系統及其存在的問題和可編程式控制器及交流變頻控制技術在船用起貨機上的應用，描述船用起貨機plc變頻控制系統的主要特性，如節能和可靠性保護。 -
The high - frequency relay can be replaced by the circuit in accordance with fig. 4 - 10 ( b )
高頻繼電器可以用與圖4 - 10 （ b ）一致的電路來代替。 -
Firstly two characteristic points of the open - loop frequency are identified based on relay feedback experiments : the ultimate point and the bandwidth point
通過繼電反饋辨識系統開環帶寬度點和臨界點，利用帶寬點的信息建立一階加純延遲模型。 -
The steady frequency three - phase ac can be changed into the ac which frequency is continuously adjusted in the experiment unit composed of rectifier, inverter, control circuit, and relay safeguard circuit
Spwm三相變頻實驗單元能夠把頻率固定的三相交流電變換成頻率連續可調的三相交流電，它主要包括交直變換、逆變、控制和繼電保護電路。 -
The system is based on chopper constant current drive technique, according to the top level design idea, adopting advanced specical subdivision control integrate circuit and powerful function 80c196kc to organize the system frame, desiging the minimum system of single - chip microcomputer, multifunction i / o interface circuit, relay switch circuit, keyboard and display circuit, multifunction digital setting interface circuit and so on, utilizing the hso and hsi interface circuit which are owned by this single - chip microcomputer exclusively and its powerful command system to realize dual - degree switch control, automation orientation, automatically searching zero position, locking machine when stopping, frequency to set digitally, automatically adjusting speed through changing frequency, swithing subdivision or squarewave control, on the basis of above, the system also have the function of running according to the setting steps and the frequency, voltage and current to display through the led, etc
系統基於斬波恆流驅動技術，按照頂層設計思想，採用先進的專用細分控制電路和功能強大的80c196kc單片機來組建系統構架，設計了單片機最小系統、多功能i o介面電路、繼電器切換電路、鍵盤顯示電路和多功能數字設定介面電路等，利用該單片機獨有的hso和hsi介面及其強大的指令系統，實現了雙余度混合式步進電動機的余度切換控制、自動定位、零位自動搜索、停機鎖定、數字化頻率設定、自動調頻變速控制、細分方波切換控制，在此基礎上，該系統還設有按預置步運行、 led頻率電壓相電流顯示等功能。 -
The millimeter has the largest frequency band and the highest velocity of communication, but it has the highest cost and technical defaults : multi - path effect, reflect and scatter caused by cloud, smoke, water - dropping, the buildings, the grounds and its shape, the interference caus ed by the thunder, the complexity of device, difficult maintenance, and so on. now the band of the leakage coaxial line is up to 3ghz, leakage coaxial line has some advantages : good adaptability to cloud, smoke, water - dropping, the buildings, the grounds and its shapes, good steady field, it has some technical defaults : lower resolution for location and measuring velocity, the more complex of its sending - receiving relay devices, weak anti - interference, the strict demand for the hole size in the line, the cleaner work environment and the higher cost
毫米波具有最大的帶寬和最高的通信速率，但也有最高的成本要求和較難克服的技術問題，即傳播的多徑效應，降水、雲霧、地形、地貌、建築物等的反射散射，打雷時的嚴重干擾，設備復雜，維護困難等等；泄漏同軸電纜的帶寬目前已做到3ghz ，具有對地形地貌建築物的適應性強，場強穩定，但它的定位測速精度低，它的收發中繼設備較復雜，抗干擾能力低，電纜上的開槽有著嚴格的尺寸要求，工作環境要求清潔，成本較高；傳統無線感應技術具有結構簡單，成本低廉，維護方便，定位精度較高的優點，但是，它沒有抗干擾能力。 -
But the elevator as an important traffic in skyscraper, it also has developed quickly with the improving requirement of the people. it ' s dragging technology has developed from dc timing to ac variable frequency timing and it ' s logic control - relay control also has been replaced by plc
而電梯作為現代高層建築的垂直交通工具，與人們的生活緊密相關，隨著人們對其要求的提高，電梯得到了快速發展，其拖動技術已經發展到了調頻調壓調速，其邏輯控制也由plc代替原來的繼電器控制。 -
Following the principle of reuse partitioning, two new frequency planning schemes are proposed, the coverage - oriented scheme and the efficiency - oriented scheme, for the cellular system with two - hop fixed relay nodes ( frns )
摘要根據復用分割原則，提出2種新的兩跳固定中繼蜂窩網的頻譜分配方案，即：側重於覆蓋面積的頻譜分配方案和側重於頻譜效率的頻譜分配方案。 -
Under - frequency relay and equipment
欠頻率繼電器及裝置 -
According the special application background of the single source and the short line in the 110kv power system, the author proposed a feasible protective scheme, in which the power frequency variation distance protect theory with combination to the four - lateral distance relay is used as quick and mainly theory
本人針對110kv單電源短線路這一特殊應用背景，提出了以工頻變化量距離保護為快速主保護，結合四邊形三段式相間和接地距離保護的保護原理方案。 -
The relay ' s electric parameters guarantee it to work reliably. the time parameter is an important one of the electric parameters, which affects the relay ' s operation frequency and its arc and electric life
電氣參數是為保證繼電器在規定的條件下使用時可靠的工作，時間參數是電氣性能參數的一個重要參數，它的大小影響著繼電器的操作頻率，而且它直接影響繼電器的燃弧及觸點壽命。 -
Methods of measurement for equipment used in terrestrial radio - relay systems ; measurements for sub - systems ; frequency demodulators ; identical with iec 60487 - 2 - 5 : 1984
地面無線電中繼系統設備的測量方法.第2部分:分系統測 -
Methods of measurement for equipment used in terrestrial radio - relay systems - part 2 : measurements for sub - systems - section five frequency demodulators
地面無線電接力系統所用設備的測量方法第2部分:分系統的測量第5節:頻率解調機 -
Methods of measurement for equipment used in terrestrial radio - relay systems. part 2 : measurements for sub - systems. section five - frequency demodulators
地面無線電接力系統所用設備的測量方法.第2部分:分系統測量.第5節:頻率解調器
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