zero current造句
例句與造句
- Occurred . it was suggested that the two levels of plateau were based on the two zero current point in
樣電流。當電壓鉗制在- 55mv時，出現(xiàn)的內(nèi)向電流與 - In chapter 5 , the controller of resonant converter designed by myself , was introduced , in which zero current switching ( zcs ) had been realized
第五章介紹了自行設計的適合于不同諧振頻率的諧振變換器的控制器，實現(xiàn)了變換器的軟開關技術。 - This paper analyses the test results gained by mixed simulation , and validates the reliability of the use of transient zero current and negative current in fault identifying
文中討論了負序電流的分布及提取問題，試驗數(shù)據(jù)同樣表明負序電流用于單相接地故障識別是可行性的。 - This paper discusses the size of transient zero current and the method of analyzing it . numeral simulation shows the feasibility of it . negative current at fault line is differ distinctly from non - fault line
文中討論了零序電流暫態(tài)分量的大小和提取方法，對數(shù)字仿真和混合仿真試驗數(shù)據(jù)進行分析，結果表明零序電流暫態(tài)分量用于單相接地故障識別是可行性的。 - 2 . we present a novel de - rail parallel resonant zero voltage transition three - phase pwm voltage - source inverter which is based on resonant zero voltage ( zero current ) transition technique ; at the same time it ' s efficiency analysis and simulation result are presented . 3
把諧振過渡軟開關技術應用于直流環(huán)節(jié)逆變器得到了一種新的諧振過渡軟開關逆變器；論文對該新型諧振過渡軟開關逆變器進行了工作原理、效率分析并對主電路進行了仿真。 - It's difficult to find zero current in a sentence. 用zero current造句挺難的
- All the power devices including main switches and auxiliary switches are in soft - switching condition ( zvs or zcs ) , while the freewheeling diodes are turned off in zero current condition . besides , the control of resonance between inductance and capacitor can be easily realized without needing of setting the threshold values of the inductance current
該電路中主開關和輔助開關均滿足zvs或zcs條件，續(xù)流二極管也工作在軟關斷方式，并且電感和電容之間的諧振控制不需要設定電感電流閾值，控制邏輯簡單，可實現(xiàn)四象限運行。 - The principle and application of zero current switching boost pfc circuit are given . by introducing the development of ac / dc module with pfc the key techniques of the module are stressed on the engineering design . some problems are resolved such as the module is so small that spread the hot difficulty
從理論上分析和研究了零電流開關升壓式pfc電路的原理和應用，并結合250w帶pfc電路ac dc模塊的研制，從工程設計角度重點闡述了該模塊的關鍵技術，解決了模塊體積小、散熱困難及工藝等方面的難題。 - Discussion is made on photocurrent output , injection current output and zero current output for photoreceiving pn junction by means of i - v equation of photoreceiving pn junction . further survey is carried out on physical elements of the injection photodetector followed by description of some experiment subjects
本文推導金屬球的雷達散射截面,同時討論金屬球散射的三個區(qū)域,金屬球本身是一個良好的雷達目標,同時又是測量目標雷達截面的參考標準,因此還研究了金屬球的尺寸、導電性能和球殼的厚度,給出了測量結果 - Conventional hard switching technology has several flaws below : on and off loss , inductive off , capacitive on and diode recover problems . comparing with it , the loss of on and off decreases markedly , as the switches are on and off in zero voltage or zero current cases . and also the size of converter becomes smaller because of the higher of switching frequency
傳統(tǒng)硬開關技術由于存在開通關斷損耗大、感性關斷、容性開通、二極管反向恢復等問題,與之相比,軟開關技術在零電壓或零電流條件下導通,開關損耗明顯降低,加上開關頻率的提高使得變換器的體積得以減小,這也是軟開關技術受到青睞的原因。 - When the motorcycle is braking or slowing down , the kinetic and / or potential energy is fed back to the battery , so the running distance can be extended and the energy efficiency is improved . an asynchronous motor is employed in this new system which can overcome the traditional dc drive system bugs and to reduce the cost and maintenance . in addition , the switches of dc / dc converter switch under zero current and zero voltage conditions , which can also reduce the switch losses , electro magnetic interference ( emi ) and prolong its life
該系統(tǒng)在功能上實現(xiàn)了車輛剎車減速或下坡制動時能量的回饋，達到節(jié)能、提高能量使用效率和增加車輛行駛距離的目的；采用交流異步電機，克服了傳統(tǒng)直流驅(qū)動系統(tǒng)的諸多缺陷，降低了成本，減少了維護；采用zczvs技術，降低了電磁干擾和損耗，提高了效率；另外，在逆變主電路中采用ipm模塊，簡化了系統(tǒng)結構，節(jié)約了空間，提高了整個系統(tǒng)的可靠性和經(jīng)濟性。 - The problem is much more critical when the inverter frequency is high . in a welding machine , the main circuit with the technology of the soft - switching is much idealer than the hard - switching . firstly of all , by the theory of the soft - switching , this paper relatively analysis the advantages of the soft - switching and , with the help of the simulation software pspice , analyzes the main circuit of the full bridge shift - phased zero voltage zero current ( zvzcs ) soft - switching
結合軟開關實現(xiàn)原理,本文首先對比分析了軟開關在提高效率、降低emi干擾等方面的技術優(yōu)勢,通過pspice軟件仿真,分析研究了全橋移相零電壓零電流( zerovoltagezerocurrent - - - - zvzcs )軟開關電路,詳細介紹了該電路的軟開關實現(xiàn)過程,并給出了電路模型和關鍵元件的設計參數(shù)。 - About the transducer between rotor and power source , the paper uses a cycloconverters , comprising 36 thyristors , and analyzes the control of circumfluence , the method of cosine crossing , the producing of trigger pulse , zero current detecting , commutating logic control and its mathematical model
對雙饋電機轉子側所接變頻器類型，本文也進行了對比分析，對選用的循環(huán)變流器的原理還作了進一步的分析，包括環(huán)流控制方法、余弦交截法原理、觸發(fā)脈沖產(chǎn)生、零電流檢測和換向邏輯控制等部分，并給出了其數(shù)學模型。 - Serial - parallel combined two - transistor forward converter is presented for high input voltage and high power application , and the operation principle of the topology is analyzed in this paper . all switches are turned off with zero voltage switching , and the two switches of them are turned on with zero current and zero voltage switching . the difference of input capacitances , conducting voltage drop of switches , duty cycle and windings of the transformer of the combined converter influences the voltage balance of the input capacitors
本文介紹了雙管正激變換器的兩種穩(wěn)定工作狀態(tài)，詳細分析了帶lcd無損箝位網(wǎng)絡的并?并組合式雙管正激變換器的工作原理，該組合式變換器中的開關管實現(xiàn)了零電壓關斷，并介紹了該電路拓撲的特點和lcd網(wǎng)絡參數(shù)設計，采用pspice軟件進行了仿真和分析，最后，研制出一臺2 . 3kw樣機。 - It combines feeder automation , and develops the fault identifying principle from one direction to two direction . so it enhances the redundancy of fault information , and improves the reliability of the fault location . we choose the transient zero current prior to others , for it is bigger than others mostly
本文敘述了饋線系統(tǒng)保護原理，提出了基于饋線自動化系統(tǒng)的幾種單相接地故障處理方案，討論了這幾種方案下故障特征量的比較方式，分析了故障特征量選用的出發(fā)點以及配電終端地址命名規(guī)則等問題。 - " soft switching " is zero voltage switching or zero current switching , which the voltage ( or current ) of the switch varies by law of sine or quasi sine , the switch is on when its voltage reaches zero ( or switch is off when its current reaches zero ) by resonance . it makes switch loss is zero , so it can increase the operating frequency and raise power density , minimize the size of transformer and inductor
“軟開關”是指零電壓開關或零電流開關，它是利用諧振原理，使開關變換器的開關管電壓(或電流)按正弦(或準正弦)規(guī)律變化，當電壓過零時，使器件開通(或電流自然過零時，使器件關斷) ，實現(xiàn)開關損耗為零，從而提高開關頻率，減小變壓器、電感的體積。