ac magnitude 中文意思是什麼
ac magnitude
解釋
交流幅度-
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。 -
The characteristics of damping shows that the uncompensated parallel ac transmission line can release the coupling between the hvdc and generator and improve the damping of the system, hence the possibility of subsynchronous oscillation decrease. in such a system scheme, the hvdc system dominates the changes of damping due to the small magnitude of the damping provided by ac line. when the ac transmission line is compensated with a fixed series capacitor, the situation will be totally different
其中，並列運行的無串補交流輸電線路可以緩解hvdc與其臨近機組之間的機電耦合程度，改善hvdc的電氣負阻尼特性，從浙江大學博士學位論文摘要而減輕機組發生次同步振蕩的危險性，此時系統的整體電氣阻尼特性由hvdc的性質決定;但若交流線路中存在串聯補償電容，則系統幅值較大的電氣負阻尼不僅可能使整流站機組發生次同步振蕩，逆變站附近機組同樣存在發生次同步振蕩的可能性，此時系統的整體阻尼特性由串聯補償電容的性質決定。 -
In the article has simulation weighing system with tdn - ac / acs system and calculate its theory value and compare to the value of identified, then has the mass magnitude size. on the other hand in the article utilize a controlling method. and it controlls the hardware, then it can improve the dynamic weighing system performance and minish the error of the dynamic system
由於控制對稱量精度影響同樣很重要，所以本文還運用了一種控制方法來改善控制過程，由於在不同的環境下，控制的設備不同，系統的一些參數也要變化，這樣如果把控制點確定為固定的值，有時誤差會很大，本文是在每次識別系統一些參數來改變控制點的大小。 -
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。 -
Calculating result showed : the thrust changing caused by the magnitude of at / ac was more larger than that both of the pressure index : " n " and of the chamber diameter, and the best thrust could be get when at / ac < 0. 3
由數值計算可知， at ac的大小變化所引起的推力變化比壓力指數n和藥室直徑的變化引起的變化大得多，而且當at ac 0 . 3時，可以得到最佳的推力效果。 -
The design of excitation power source based on principle of three phase step motor and pulse width modulation ( pwm ) technology, intelligent power model ( ipm ) is used for inverter switches, the output ac pulse used as excitation signals. the speed of rotation and magnetic intensity can be changed by regulate the exciting converted frequency and magnitude of exciting current. constant current is achieved by closed loop feed back
勵磁電源結合步進電機原理與脈寬調制技術，選用智能功率模塊ipm作為逆變開關器件，輸出交流脈沖勵磁信號，以調節勵磁轉換頻率和勵磁電流大小為手段，實現對磁場旋轉頻率和磁場強度大小的有效調節，並通過閉環反饋實現閉環恆流控制。 -
Current transformers are widely used for changing the magnitude of ac current. high currents can be stepped down to facilitate measurement by precision ammeters
使用變流器能把高值電流變為低值電流，以便使用精密電流表進行量測。 -
However, when analyzing ac circuit, it is important to consider the magnitude as well as the direction of phasor quantities
不過，在分析交流電路時，重要的是不僅要考慮相量的幅值，還要考慮相量的方向。 -
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 term impedance is applicable only to ac circuits. its unit of measurement is the ohm. it has a magnitude as well as phase angle. it is a complex quantity
"感抗"這個術語只適用於交流電路，其測量單位為歐姆。感抗不但有幅值，而且有相角，它是一個復數量。
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