magnitude of voltage 中文意思是什麼
magnitude of voltage
解釋
電壓值-
The algorithm of svpwm that is adopted by the system implements motor speed - regulation by control of magnitude and phase of motor flux. it can generate less harmonics in the output current of power inverter and less losses of ac motor, reduce pulsant component in output torque and raise availability of dc supply voltage
系統採用的svpwm演算法通過對空間磁鏈矢量幅值和相位的控制來調節電機轉速，減少了逆變器輸出電流的諧波，降低了脈動轉矩，提高了電壓的利用率。 -
A design adding a dc chopper after the triphase rectification was given to reduce the peak of the pulse of voltage, aiming at the characteristics that the magnitude of the rated voltage of permanent magnet synchronous motor ( pmsm ) is far below that of the power supply, also the electric parameters of the devices were given
針對專用永磁同步電機額定電壓大大低於電網電壓這一特點，為降低電機上承受的峰值脈沖電壓，設計了在三相整流之後增加一級直流斬波器並給出了相應的電氣參數。 -
1 m 0. 5, the phase - shifted angle 6 is controlled in term of sine law which makes the magnitude of resonant voltage track a reference sine voltage, and the resonant voltage is rectified, filtered, inverted and then the better sine - voltage output is obtained, theoretical analysis and experimental results show that for the resistive load and inductive load, the switches of leading leg of the phase - shift - controlled circuit are always turned on at zvs, and ones of lagging leg are turned on at zvs ( < 0 ) or turned off at zcs ( ( > 0 ), moreover, all switches in the low - frequency inverter are always turned on and off at zvs, the measured circuit efficiency for rated load reaches up to 88 %
從功率單向流動角度出發，提出了一種lcc諧振型恆頻移相單相高頻鏈逆變電路拓撲，在調制系數0 . 1 m 0 . 5情況下，控制移相角按正弦規律變化，使諧振電壓脈沖列的幅值追蹤參考正弦電壓信號，經過整流、濾波、低頻逆變，從而獲得正弦度較好的輸出電壓。理論分析和實驗結果證明對于阻性負載或阻感性負載，移相全橋具有超前橋臂零電壓開通，滯后橋臂或者零電壓開通（ _ 0 ）或者零電流關斷（ _ 0 ）的軟開關特性，而低頻逆變器的各個開關均實現零電壓條件下的開通與關斷。 -
Second, the results of theory analysis and simulation research show that the output of one cycle controlled bridge switching power amplifier have dc offset because of the nonideal characteristic of reset signal. the magnitude of output dc offset voltage is proportional to width of reset pulse. a voltage compensation technique is used to solve this question, and the computation formula of compensation voltage is gived. the circuit compensated and not are researched through simulation and experiment, which results show that compensated circuit solve the output dc offset effectively
其次，理論分析和模擬研究結果表明，由於復位脈沖的非理想特性，單周控制的全橋開關功率放大器輸出端存在直流偏置問題，其大小與復位脈沖的寬度成正比。針對輸出直流偏置問題，提出了電壓補償的改進方案，給出了補償電壓的具體計算公式。對補償前和補償后的方案進行了對比模擬研究和實驗研究。 -
Because central potentials of four y windings in 12 - phase generator are not equal each other and there is no common reference inside the generator, it is difficult to identify the on / off of rectifying elements. in this paper, by using a mathematical model with line voltage substitute for phase voltage, the problem that there is no common reference in the 12 - phase generator with rectifier is solved. based on results of the studies on small prototype, 920kw charging generator applied in a submarine is improved in design, and therefore power oscillation with high magnitude when two generators are operating in parallel
由於十二相發電機中四個y繞組的中點電位不等，電機內部沒有公共參考點，從而在判斷整流元件導通時，不能象三相同步發電機整流系統那樣認為陽極電位最高或陰極電位最低的整流元件導通，本文採用了以線電壓代替相電壓建立十二相整流發電機的數學模型，從而解決了十二相發電機無公共參考點的問題。 -
Applying relative arithmetic to all kinds of faults and calculating off - line, we can master time - distance relation chart for all kinds of faults. computation indicates : when transmission lines occur faults, the data window of protection algorithm consisting of prefault and postfault data at the same time has important significance. the following methods are useful to achieve the inverse time characteristic : calculating impedance by using flourier in a full cycle, calculating work voltage by using fault component, calculating the torque created by a phase comparator or a magnitude comparator
實際的計算表明：輸電線路發生故障后，用故障前後的數據同時充滿保護演算法的數據窗，對于快速切除近區故障具有很重要的意義；同時利用故障前後的數據，下述方法可以比較好地實現距離保護的反時限特性：直接用全周傅里葉演算法進行阻抗計算；採用工頻變化量阻抗繼電器進行工作電壓的計算；採用轉矩的思想進行轉矩的計算。 -
The stator of aceg is connected to the grid and the three symmetrical excitation windings in the rotor are fed by converter. the magnitude and frequency and phase and phase sequence of excitation voltage can be controlled, so the magnitude and position of excitation mmf as well as the speed of rotor can be controlled. therefore, acegs have superior performances by contrast with conventional synchronous generators and induction generators, such as upstanding stability, power generation of variable speed constant frequency ( vscf ), adjusting active power and reactive power independently, and absorbing lag reactive power deeply
交流勵磁發電機的基本結構與繞線式異步電機相同，其定子側接電網，轉子上採用三相對稱分佈的勵磁繞組，由變頻器提供對稱交流電勵磁，且勵磁電壓的幅值大小、頻率、相位、相序都可根據要求加以控制，從而可以控制發電機勵磁磁場大小、相對于轉子的位置和電機的轉速，使得交流勵磁發電機具有良好的穩定性及轉速適應能力、獨立的有功與無功調節能力和較強的進相運行能力，性能超越傳統同步發電機和感應發電機，因而有著廣闊的應用前景。 -
Magnitude of a voltage fluctuation
電壓波動量 -
This paper considers two controllers with different feedback signals ? the ac current phase angle of converter transformer and the ac voltage magnitude of inverter bus, respectively. pscad / emtdc simulation software is used for the controller testing. the test models used for the analysis are the cigre hvdc benchmark systems with different scr at the inverter side
為了驗證該控制方式的有效性，本文採用了電磁暫態模擬軟體pscad emtdc ，在國際大電網會議cigre提出的hvdc標準模型上，用逆變側短路比不同的系統對調制控制器的性能進行了模擬測試，調試出了調制控制器的各參數值。 -
In the researches about hexagon track, smith triggers are used, so is flux self - control. as to round track, the method of voltage vector selection is taken. we can select the proper voltage vector by the position and magnitude of stator flux as well as the magnitude of torque
在六邊形磁鏈的研究中，本文主要是使用了施密特觸發器，通過磁鏈自控制單元來實現的；而對于圓形磁鏈的直接轉矩而言，則是利用了電壓矢量查表的方法，通過實時判斷磁鏈的區間和幅值、以及轉矩的大小，繼而從表格中選擇合適的電壓矢量。 -
This voltage will be negative if the line is idle and alternate between that negative level and a positive level when data is sent with a magnitude of 5 to 15 volts
譯為： 「該引腳的電平，如果在總線空閑狀態，其電壓為負，而在數據發送狀態，其電平則在5 15伏的正電平和負電平之間變化。 」 ？ -
While, the mean discharge magnitude increase first and after that it has an approximate constant with the increase of applied voltage
間隙中的平均放電量隨著空氣間隙長度的增加而減小，隨著施加電壓的升高先增加后近似保持不變。 -
The operating principles of svpwm and associated control algorithms are also covered in the paper. by using svpwm to control the magnitude and phase angles of the spatial voltage vector, the speed control of the drive system in this paper can reduce the output of current harmonics, lower the torque ripple, and improve the energy efficiency
本文還對svpwm的工作原理和控制演算法進行了研究，控制系統採用svpwm演算法，通過對空間電壓矢量的幅值和相位的控制來調節電機轉速，減少了逆變器輸出電流的諧波，降低了脈動轉矩，提高了電壓的利用率。 -
Inductive voltage dividers ( ivd s ) will be calibrated by comparison with the laboratory s 8 - dial ivd, normally at specific frequencies of 400 hz, 1 khz and 10 khz with an input test voltage of 25 v. the calibration normally involve measurement of voltage ratio ( magnitude ) of the output voltage related to the input voltage of the ivd
感應分壓器一般按400hz 、 1khz及10khz等指定頻率及25v的輸入測試電壓，透過與本所的八刻盤感應分壓器對比而進行校正。校正工作一般包括測量該感應分壓器輸入電壓與相對輸出電壓的電壓比（幅值） 。 -
The contributions done are as follows : according to the mathematical model of doubly fed motor and the theory of vector control, a unit power factor of rotor control scheme is proposed. in the doubly fed adjustment system, in order to control magnetic torque of motor this scheme is designed by controlling the reverse direction between rotor voltage and current to keep the vertical direction between rotor current and flux. it is known from theoretical analysis that for partly decoupling this scheme is only effective under sub - synchronization speed, but not control the system and obtain steady state since speed adjustment system ca n ' t adjust the magnitude of rotor flux under sup - synchronization
而傳統的無速度傳感器雙饋調速矢量控制系統，由於採用磁鏈定向方法，在同步速附近存在較大的工作死區，針對上述問題，本文做了如下的研究工作：本文從雙饋電機的數學模型出發，根據矢量控制的基本原理，提出了一種轉子側功率因數為1的雙饋電機矢量控制方案的設想，即在雙饋調速時採用轉子電流定向的方法，並控制外加轉子電壓與轉子電流始終反相，以保持了轉子電流與轉子磁鏈矢量垂直，通過控制轉子電流的大小來達到控制電機電磁轉矩的要求。 -
Measurement uncertainties will depend on the values of the voltage ratios being determined, the magnitude of the applied voltage and stability of the dividers under test
測量不確定度將視乎測試分壓器的電壓比率，測試電壓值及該分壓器的穩定性而定。 -
With the mathematics models of the lithium ion battery and ac motor, the approach and magnitude of energy consume of the whole vehicle are analyzed under the conventional theory of automobile in this paper. at the same time, the relation between the energy consume and the charge and discharge voltage and current of the battery, as well as that between the energy consume and the voltage and current of the motor stator are made clear on the basis of ece drive mode
文章從傳統的汽車理論出發，結合鋰離子動力電池和電機的數學模型，分析了純電動汽車整車的能量消耗途徑和大小；基於歐洲ece循環驅動模式，建立了純電動汽車的功率消耗與電池的充放電電壓、電流以及電機定子電壓、電流之間的關系，並在此基礎上分析了純電動汽車的續駛里程和制動能量的回收問題。 -
The rbf network has a better performance, and better forecasting accuracy. then mathematical model of substation voltage / var control is constructed, the squares minimization of voltage differences as target, also considering requirement of voltage and power balance, taking it into consideration that the magnitude constraint of transformer ratio and compensating capacitor, also that constraint of operation times of one day transformer tap and capacitor switch
因此提高了學習性能，具有較好的預測精度。然後，建立變電站電壓無功控制的數學模型，考慮電壓的調壓要求和無功功率平衡，計及變壓器變比和並聯補償電容的上下限約束，變壓器分接頭和電容器允許的日調節次數的限制，以電壓偏差的平方和最小為目標函數。 -
This thesis presents the basic concepts, the characterization of voltage sag, which includes magnitude, duration, and phase - angle jumps. the basic voltage sag analytical techniques based on circuit theory and reliability theory is followed
本文給出了電壓瞬間跌落的基本概念、描述特徵及其統計計算的基本方法，分析了電壓瞬間跌落的概率分佈、對電力系統和用戶的巨大危害。 -
Then the paper presents two important concepts on wavelet transform : multi - resolution analysis and wavelet package analysis. last, the paper introduces the application of wavelet transform on power quality analysis, especially on the research of voltage flicker. we can get the magnitude and frequency of the embed signal by mra
最後介紹了小波變換在電能質量分析中的應用，重點討論了電壓閃變問題，用小波多解析度分解和子帶濾波方法對電壓閃變的包絡信號進行分解，檢測出包絡信號中的各個頻率分量及其幅度。
分享友人