滯后功率 的英文怎麼說
中文拼音 [zhìhòugōnglǜ]
滯后功率
英文
after power-
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。Multiple functions available : start / crater arc current, increase / decrease time, base / crest value current, pulse frequency, pulse rate, post flow time, hf welding
功能豐富:起始/收弧電流、上升/下降時間、基值電流、峰直電流、脈沖頻率、占空比、滯后關氣時間分別可調,高頻引弧。Multiple funcyions available : start / crater arc current, increase / decrease time, base, crest value current, pulse frequency, pulse rate, post flow time, hf / friction welding, water / gas cooling
功能豐富:起始/收弧電流、上升/下降時間、基值電流、峰值電流、脈沖頻率、占空比、滯后關氣時間分別可調,高頻/接觸引弧、水冷/氣冷可供選用。Hysteresis is not only found for the temperatures, due to the difference between the onset and damping temperatures, but also for the input heating power, i. e., the critical onset power is also different with the critical power for the damping process
此外,還發現熱聲起振和消振過程中的臨界溫度和臨界功率都存在滯后現象。基於對滯后現象的分析,提出了一個混合驅動源熱聲驅動器的方案。By analyzing the basic principle of voltage space vector pwm, a method is proposed to choose the zero vectors dynamically according to the power factor angle of the load and the concept of the lag angle of non - switching sectors
在分析了空間矢量pwm基本原理的基礎上,提出了一種根據負荷功率因數角動態分配零矢量的方法,並引入了不開關扇區滯后角的概念。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。By compared with the simulation results and the experiment results, we come to the conclusions that : ( 1 ) circuit with assistant network can widen soft - switching extent in lagging arm, reduces duty - cycle loss on the secondary, diminishes switching dissipation of inverter spot - welding power source. ( 2 ) the range of resonant capacitor, the important factor to soft - switching process, not only affects zero - voltage turn - off of power switches, but also affects the range of zero - voltage turn - on of power switches. so resonant capacitors must be considered according to many aspects ; ( 3 ) it easily fulfils soft - switching condition in lagging arm as leakage inductance of power transformer increases, but bigger leakage inductance of power transformer increases opening dissipation of transformer and decreases efficiency of soft - switching inverter power source
通過模擬結果與軟開關點焊逆變器試驗結果的對比分析,得到了如下主要結論:採用輔助網路可以完全拓寬全橋軟開關逆變器的滯后橋臂軟開關范圍,減小了次級占空比丟失,降低了逆變電阻點焊電源的開關損耗;諧振電容是影響軟開關工作狀態的重要因素,其大小不僅影響開關管的零電壓關斷,同時也影響開關管的零電壓開通范圍,因此,諧振電容應該綜合考慮;功率變壓器漏感越大,越容易滿足滯后橋臂的軟開關條件,但是大的漏感也使變壓器的通態損耗增加,降低了軟開關逆變器的效率。A hysteretic loop is also found in this system and its influencing factors are analyzed to discuss the condition of its occurrence, which is expected to help further understanding the mechanism of thermoacoustic oscillation
針對不同的加熱功率和充氣壓力,系統地研究了起消振過程中的溫度、壓力變化特性,著重分析了滯后迴路形成的過程和影響熱聲系統滯后迴路的因素,指出滯后迴路存在的條件,對深入理解熱聲系統的起消振行為具有參考意義。In order to deal with the nonlinearity and hysteresis of piezoceramics, a precise power amplifier circuit with charge - feedback loop was developed. and an electromechanical model of piezoelectric actuator is presented to demonstrate that charge - feedback control is prominently effective to reduce hysteresis, creep and to improve linearity
本文針對壓電陶瓷存在非線性與滯后的問題,根據電荷反饋原理設計了精密功率放大電路和電荷反饋迴路;建立了壓電作動器的機電模型,證明了電荷反饋控制對于減小回滯現象、提高線性度有明顯的作用。Money market develops slowly but capital market develops fast. the department markets of money market and capital market doesn ’ t develop correspondingly. the reason is that our government has paid too much attention to financial function but ignore the policy function, which segregates money market from capital market
貨幣市場發展滯后造成這種狀況的根本原因在於過分注重金融市場的籌資功能,而忽視其應有的政策功能,對貨幣市場和資本市場實行人為的「隔離」政策,造成兩個市場收益率之間的明顯差異,促使貨幣市場資金大量違規流入資本市場。Note1 : up screen display power factor and down screen display voltage to be lead or lag
注1 :上屏顯示功率因數,下屏顯示電壓超前或滯后。The laboratory can provide calibration for 50 or 60 hz single - phase power factor meters with measuring range from zero to unity, leading or lagging
功率因數表本所可為頻率為50或60hz而測量量程由零至一超前或滯后的單相功率因數表提供校正服務。The generators are of three - phase four - wire type, making use of star connection with neutral point. the rated line voltage is 400v. phase voltage 230v. frequency 50hz, power factor 0. 8 ( lag ). it can provide 60hz and the other voltage ' s generator according to necessary
本發電機為三相四線制,採用帶有中性點的星接法,額定電壓為400伏,相電壓為230伏,頻率50赫,功率因素0 . 8 (滯后)根據用戶需要,也可提供60赫及其它電壓值的發電機。Experiments on board shows that strain method to measure the shaft power has many advances, e. g., high sensitivity, wide measuring span, rapidly frequency - response, light hysteresis, small size and weight - light of the equipment, remote - controllable
應變電測技術在艦船軸系軸功率測試中得到廣泛的應用,是由於該系統具有靈敏度高,測量范圍廣;頻率響應快,機械滯后小;體積小、重量輕;可實現遙控等諸多優點。The laboratory offers calibration for single - phase wattmeters at fixed frequencies of 50 hz, 60 hz or 400 hz, and in the power factor range of unity to 0. 5 leading or lagging
功率表本所為固定頻率50hz , 60hz或400hz及功率因數為1至0 . 5超前或滯后的單相功率表提供校正服務。So by analyzing the stability of voltage vector and the changeability of current vector, we proposed to construct sinusoidal sequences with the same and delaying ninety - degree phase angles to voltage vector, then to multiply with the current vector respectively to bring about active and reactive power
本文分析了單相系統電壓矢量的穩定性以及電流矢量的多變性特點,提出了對電壓矢量採用構造與之同相位和滯后90相位正弦序列的辦法,並分別與電流矢量相乘從而導出其有功和無功功率。分享友人