variation in voltage 中文意思是什麼
variation in voltage
解釋
電壓變動-
First from system aspect, this paper uses voltage sensitivity, pv curves method, equivalent reactive compensation method, back - up generation method to evaluate the reactive value of the generators in seven buses system and ieee 14 buses system. the vs and pv methods can evaluate the source ' s ability of tracking the load ' s variation. the erc and back - up methods can evaluate the availability of replacing other generators. the value determines the cost
從對系統貢獻角度，採用電壓靈敏度方法（ vs法） 、 pv曲線法、等效無功補償法（ erc ） 、無功備用方法來確定一個七節點系統中的發電機的無功價值和ieee14節點系統的發電機的無功價值，電壓靈敏度法和pv曲線法可比較出不同電源跟蹤負荷變化的靈敏度大小，而等效無功補償法和無功備用方法可比較出不同電源替換其它發電機是否是最有效率的。 -
In such devices, it is desirable to have a high dielectric tunability in a certain electric field range, where tunability is defined as the variation of dielectric constant with respect to the applied voltage
自上世紀50年代以來，用電控的方式進行波束掃描的方法得到了迅速發展，從而使相控陣天線及其基本元件移相器的研究獲得了廣泛的重視。 -
The soft switching, phase - shifted pwm and bi - directional dc - dc converter hang together, depress circuit switching loss and noise effectively, which provide condition to increase switch frequency, efficiency and reduce size and weight for the converter ; at the same time, it is proved the converter can achieve zvs in larger load variation, and the converter has the virtue of structure compact, voltage and current stress small such as ordinary hard switch converter
該變換器把軟開關技術和相移控制pwm技術以及雙向dc - dc變換器技術有機結合在一起，有效地降低了電路的開關損耗和開關噪聲，為變換器裝置提高開關頻率、效率以及降低尺寸及重量提供了良好的條件;同時，能拓寬零電壓開關的范圍，使變換器在較寬的負載變化范圍內都能實現軟開關。 -
Based on the hydrodynamic energy transport model, the influence of variation of negative junction depth caused by concave depth on the characteristics of deep - sub - micron pmosfet has been studied. the results are explained by the interior physical mechanism and compared with that caused by the source / drain depth. research results indicate that with the increase of negative junction depth ( due to the increase of groove depth ), the threshold voltage increases, the sub - threshold characteristics and the drain current driving capability degrade, and the hot carrier immunity becomes better in deep - sub - micron pmosfet. the short - channel - effect suppression and hot - carrier - effect immunity are better, while the degradation of drain current driving ability is smaller than those with the increase of depth of negative junction caused by source / drain junction shallow. so the variation of concave depth is of great advantage to improve the characteristics of grooved - gate mosfet
基於能量輸運模型對由凹槽深度改變引起的負結深的變化對深亞微米槽柵pmosfet性能的影響進行了分析，對所得結果從器件內部物理機制上進行了討論，最後與由漏源結深變化導致的負結深的改變對器件特性的影響進行了對比.研究結果表明隨著負結深（凹槽深度）的增大，槽柵器件的閾值電壓升高，亞閾斜率退化，漏極驅動能力減弱，器件短溝道效應的抑制更為有效，抗熱載流子性能的提高較大，且器件的漏極驅動能力的退化要比改變結深小.因此，改變槽深加大負結深更有利於器件性能的提高 -
Zero - voltage turn - on and zero - voltage turn - off in lagging arm and leading arm of soft - switching topology, working waveform of power transformer and process of rectifier and transition are presented in detail. the influence of resonant inductance of the power transformer, resonant capacitor and variation of load to the process of soft - switching are given
主要對軟開關滯后橋臂和超前橋臂的零電壓開通、關斷過程，功率變壓器的工作波形及整流換流過程進行了詳細的模擬分析，並重點討論了逆變器的諧振電感、諧振電容以及負載變化對軟開關過程的影響。 -
In accordance with the driving characteristics of ac driving locomotive, the working status of its traction transformer is analysed. the questions that should be considered in the traction transformer design of ac driving locomotive are mentioned. these questions are the large short - circuit impedance of traction winding, higher harmonic current, over - excitation and dc magnetization caused by large variation of the network voltage, etc. some disposal methods are given
針對交流傳動電力機車的傳動特點，對其中的牽引變壓器的工作狀態進行了分析，指出交流傳動電力機車用牽引變壓器設計時需考慮的牽引繞組的短路阻抗大、電流的高次諧波、網壓波動大可能引起的過勵磁以及直流磁化等問題，同時給出了相應的一些解決方法。 -
The accurate calculation of the input voltage and the compensation for the dc - offset error and the variation of the stator resistance are important factors in practical implementation of the integration since they can cause a drift in the stator flux linkage trajectory and furthermore deteriorate the quality of torque control
因此，輸入電壓的準確計算、直流漂移量的補償以及定子電阻變化的補償都是影響積分計算準確性的重要因素，這些誤差會導致定子磁鏈軌跡的偏移，進而降低系統轉矩控制的性能。 -
In the eddy - current testing, testing coil is the sensitive component connecting the specimen and the instrument, so it is called transducer. the information of the test specimen is reflected by the variation of the coil impedance ( or induced voltage )
在渦流檢測中，檢測線圈是用來連接測試儀器和被測試件的敏感元件，它是渦流檢測中的傳感器，被檢試件的信息是通過線圈阻抗（或感應電壓）的變化反映出來的。 -
In order to ensure the whole system operate economically, power department equip transformer with onload tap changer and shunt capacitors for most distribution substations, according to the operating condition, adjusting the position of transformer taps and capacitors can control the variation of voltage and reactive power exchanger of distribution substations and power system in certain extent
為確保整個系統運行經濟性，降低網損，電力部門在大多數變電站配置了有載調壓變壓器和並聯補償電容器組，根據運行情況適當調節變壓器分接頭的位置和投切並聯補償電容器組，可以降低電壓變化和變電站與系統的無功交換控制在一定的范圍內，確保供電質量和電網運行的經濟性。 -
Specific issues examined are : compensation for the variation of the stator resistance, the offset error of the dc bus voltage, the voltage error generated by the forward voltage drop the dead time of the switches, improvement of the steady state performance, and the speed sensorless control for the pmsm dtc drive system are of major concern in this thesis
定子電阻變化，直流母線電壓漂移，開關器件反向相電壓降、逆變器死區時間引起的電壓誤差的補償，提高系統穩態運行性能以及永磁同步電機直接轉矩控制的無速度傳感器運行方案等問題都是本文研究的重點。轉矩的快速響應是直接轉矩控制演算法的一個卓越的性能。 -
Furthermore, capacitance - voltage converting circuit in the sensitive chip was designed and analyzed, and using differ - measurement technique trivial capacitance variation caused by vibration could be converted into detective voltage signal. secondly, signal processing circuit was designed and simulated
二、對後端信號處理電路進行了設計及模擬，在外殼設計的基礎上製作出了雙軸振動傳感器樣品，並對其基本性能指標進行了測試與分析。 -
Constant stator magnetic linkage control frequency converter includes power devices utilizing igbt, drive circuit using three - phase drive ic with multiple protection functions. pwm signal formation circuit in the way of voltage space vector control and realized with pld ( programmable logic device ) devices and compensation for the influence of supply voltage variation and stator resistance voltage drop
其中，恆定子磁鏈控制變頻器的設計中主電路採用功率器件igbt ；驅動電路採用三相多功能集成驅動晶元； pwm脈寬調制信號產生電路採用電壓空間矢量控制方式，由pld器件實現；對電源電壓變化及電阻壓降造成的影響進行了補償。 -
In the research and preparation procedure, it probes into electric field dynamic impedance variation rules, summarizing a set of sparks critical point discrimination methods in solving the key to detect electric field less - spark technology and realizing the less - sparks operation controlling function under impending arcover voltage, putting forward and realizing constant spark rate operation mode, in fiashover treatment adopting method of small descending amplitude, speedy picking up speed, and unlocking silicon controlled rectifier
在研製過程中探索了電場動態阻抗變化規律，總結出一套識別火花臨界點的方法，解決了探測電場少火花的技術關鍵，實現了逼近擊穿電壓下少火花運行控制功能，提出和實現了恆定火花率運行方式，在閃絡處理上採取下降幅度小、回升速度快、不封鎖可控硅的方法。 -
For an ev drive system, the variation of rotor time constant will bring on variation of torque and exorbitant line voltage even the field orientation may be destroyed. the varied torque will affect ev dynamic performance, and the higher voltage will limit the output power due to the bound of batteries in ev
對于電動汽車驅動系統來說，轉子時間常數的波動會導致輸出轉矩和電機電壓的波動，並且嚴重時會導致系統出現振蕩，轉矩的波動會影響汽車的動態性能，電機電壓的波動則會由於電池電壓的限制而影響電機的輸出功率，這些都是電動汽車的驅動系統應該避免的問題。 -
This article has discussed the control problem in a distribution substation and on the distribution line respectively. reactive power / voltage control in a substation using general approach usually results in the voltage of the second side being too close to the boundary. it will make the ability of enduring the variation of load in a system decrease a lot and become the threat of the system
本文分別對配電系統中的變電站及配電線路的無功電壓優化控制問題進行了研究，採用常規方法進行變電站電壓無功控制時，往往使二次側電壓過于接近邊界而導致系統承受負荷波動的能力大大下降，成為系統安全運行的隱患。 -
Numerical computation of the dynamic variation of the arc have been completed in the process of before current zero, after current zero and approaching zero to simulate the arc dynamic variation during the interruption process for the high voltage sf6 circuit breaker
對電流零前、過零期間以及零后的電弧動態變化進行數值求解，實現了高壓sf _ 6斷路器開斷過程電弧動態變化的模擬模擬。
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