換極器 的英文怎麼說
中文拼音 [huànjíqì]
換極器
英文
changer pole-
Mems ( micro electromechanical system ) has become one of the most rapidly development technologies. along with the rapid development of mems techniques, capacitive sensor is used widely whose capacitance changes small, which has put forward the new request to the measurement technique. the common measure for capacitance measurement is that convert capacitance to voltage, electric current or frequency. the area of polar plate of the capacitor becomes smaller and smaller, and the total capacitance of micro capacitive sensor is usually several pico farad only. as a result, its change amount is smaller
Mems （ microelectromechanicalsystem ）近年來發展最快的技術之一，隨著mems技術的快速發展，電容式加速度計的電容變化變化量越來越小，對檢測技術提出了新的要求。在電容式傳感器中，常用電容檢測電路是將其轉換為電壓、電流或者頻率信號。目前的微型電容傳感器的極板面積變得越來越小，電容總量只有幾個pf ，變化量就更小。For starters, the core ' s motion could help explain why magnetic north and south periodically wander or reverse over earth ' s history
就像起動器一樣，地核的運動有助於解釋南北磁極周期性變換或歷史上地球磁極的翻轉原因。We are your specialist for semiconductor diodes and rectifiers : standard to ultrafast recovery, schottky, zener, supressor - diodes, bridge rectifiers, transistors, diacs ; also customized
我們是專門提供二極體以及整流器，例如:標準到超快速恢復，肖特極，穩壓，雙向觸發二極體，橋式整流器，轉換器等等，可以依照客人要求訂做。Under special conditions such as low partial load / deep vacuum, unexpected high air leakage resulting in a major temperature difference ( above 10 c ) between the steam exhaust turbine temperature and all air - take off temperature measurement, the suction capacity can be improved by using 2 main ejector simultaneously
在特殊條件如局部低載荷/極端真空，不正常的熱交換，意想不到的高空氣泄漏導致的在蒸汽排氣溫度和抽空溫度測量上產生的嚴重溫差（ 10 c以上） ，用兩臺主抽汽器同時工作可以提高抽氣量。Cannula compensator is comprised of body tube, compensation tube, flange and gadket. the product is applied in the drainage engeineer, providing great convenience to the detachment and installation of water tower and water meter of pump room. and it plays a role to resolve the compensation issues caused by temperature difference for long pipeline. sgd, axial displacement., , ,
套管式伸縮器是由體管伸縮管壓蘭密封圈構成的，此產品用於給排水工程，它為城鎮自來水塔泵房水表及閥門安裝拆換提供了極大的方便，以及對長距離管道用溫差引起的伸縮問題，起到了良好的填補作用。Here a low cost optimal position system with speed - loop open and position - loop closed based on fuzzy control is presented, it employs fuzzy controller to verdict rotor velocity approximately and a fuzzy switching curve is substituted for real one to achieve bang - bang switch, no limit - loop or oscillation occurs. at the end of this chapter, a dc break curve is discussed
為了實現經濟實用的點對點快速定位系統，實際系統採用速度開環、位置閉環結構，速度量從模糊控制器得到，既不實測也不軟體估計，用模糊開關線代替真實開關線進行控制量狀態切換，無極限環或振蕩現象，而成本則大大降低。This thesis focuses on the development of the dc / dc stage, which adopted the phase - shifted zero - voltage - switching ( zvs ) pwm full - bridge converter with two clamping diodes
本文主要研究單相靜止變流器的dc / dc級，它採用加箝位二極體的移相控制zvspwm全橋直流變換器。A novel low mechanical hysteretic ceramic capacitive pressure transducer has been made, by using of ceramic sealing technology ; integrate circuit ( ic ) technology and thick film plane fixing circuit technology. this transducer is made of a deformable ceramic diaphragm and a ceramic base plate, between which has an air cavum. a coaxial gold electrode was fired onto the diaphragm and the base plate
本文利用新型陶瓷技術、集成電路技術和厚膜平面安裝電路技術，採用零力學滯后的陶瓷和陶瓷密封材料進行設計製造了一種非充液乾式的電容式壓力傳感器，該壓力傳感器由較厚的陶瓷基體和較薄的陶瓷膜片構成，中間形成一空氣介質腔，在基座和膜片之間內置同軸的雙電極，組成兩個電容，當膜片承受壓力時發生位移，使電容量產生變化，經後置處理電路直接轉換為可輸出的直流電壓信號。So, how to consider about these factors and design out suitable dc / dc converter becomes very important. at the same time, it helps a lot to bring the fuel cell to market use
因此，如何綜合考慮這些因素，合理設計符合要求的dc / dc變換器就顯得尤為重要，同時這對于燃料電池的市場化推廣應用也具有極其重要的意義。Circular polarization is one of microwave equipment with broad application. its the mostly function is switch linearly - polarized wave into circular polarized wave. grating - circular polarization is one of circular polarization, its advantage is simple structure and ease of processing. it is prone to expand high power and high efficiency range. because circular polarization have expand application.
圓極化器是應用廣泛的微波器件之一，其主要功能是將線極化波轉換成圓極化波。光柵圓極化器是其中的一種，它具有結構簡單，加工實現容易，易於向高頻率、高功率應用擴展等優點。The conventional methods of the gemmology and the modern instruments of electronic probe, ultraviolet - visible spectrophotometer, fourier transform infrared spectrometer, cathodoluminescence spectrometer are used to research and analyse the flux - grown synthetic spinel and compare them with the natural spinels
摘要採用常規的寶石學研究方法以及電子探針、紫外可見分光光度計、傅里葉變換紅外光譜儀和寶石陰極發光光譜儀等現代測試儀器，對助熔劑法合成尖晶石的寶石學特徵進行了全面分析，並與天然尖晶石進行了對比。Third, this thesis analyzes the angle - control theory based on half bridge converter, and proposes a new way to find the optimized angle. simulation is performed to verify the results. then, this thesis introduces the hardware and software design of the digital control system of doubly salient electro - magnetic motor, which mainly discusses the speed and current loops and angle optimization control
再次，本文介紹了角度控制與電機轉向的關系，並對基於半橋變換器的電勵磁雙凸極電動機換相角與相電流及輸出轉矩的關系進行了理論分析和模擬驗證，提出了優化電勵磁雙凸極電機換相角的方法。The input impedance of the interdigital saw transducer is measured by the equivalent circuit method. the experimental results show that the synchronized frequency of 9. 586 mhz, the acoustic radiation resistance of 44. 6 and the static electrode capacity of 194pf all agree with those design values
用自行設計的等效電路測量方案，測量了表面彈性波馬達換能器的輸入阻抗，實驗結果顯示表面彈性波換能器的共振頻率為9 . 586mhz ，輻射聲電阻為44 . 6 ，叉指電極靜電容為194pf 。Aiming at latent damage induced by esd, 1 / f noise spectrum and a new method similarity coefficient based on the matched maxima of wavelet transform modulus are offered at the same time
針對靜電在mos器件中引入的潛在損傷，在使用1 / f噪聲功率譜監測的同時並提出了一種新的由1 / f信號提取得到的基於子波變換極大模的相似系數表徵法。But the sound field generated by this kind of transducers in medium has s ome " congenital " shortcomings : there always exist zero areas in sound - axes of near - field however we change the frequencies and radii of transducers, so we need to look for better radiate transducers. in this dissertation, we design and make two kinds of radiate transducers : bunchiness control transducer with electric polarity division and gaussian transducer
然而，這種類型的換能器在媒質中產生的輻射聲場，有其「先天性」的不足之處，在近場中無論平面活塞的頻率和半徑如何變化，軸上和沿徑向上都呈現出極大和極小交替分佈的干涉現象，因此我們有必要繼續尋求更為理想的輻射形式。Hvdc light is a kind of new dc transmission technology developed from the traditional hvdc, with voltage source converter ( vsc ) and igbt as main components. the basic principles of vsvpwm are studied, and an approach to simulate vsvpwm based on pscad / emtdc is put forward in this thesis
輕型高壓直流輸電（ hvdclight ）技術是在傳統直流輸電基礎上發展起來的一種新型輸電技術，其主要部件是以絕緣柵雙極晶體管構成的電壓源換流器（ vsc ） 。There were three kinds of polarized models for cymbal piezoelectric transducers : axial, radial and tangential polarized models. with finite element analyses method calculate the displacements produced by three kinds of models of cymbal transducers separately
本文運用有限元分析方法，分析了壓電陶瓷片分別為縱向極化、徑向極化和切向極化三種工作模式下cymbal換能器的縱向位移，通過比較最終確定採用縱向極化工作模式。This conclusion is very important when we use the resonance chamber to a heat exchanger in engineering projects, especially for reforming the existing heat exchangers
這一點對于將共振腔換熱器應用於實際工程中顯得極為重要。特別是對工程領域中已有的眾多的換熱器的改造顯得極為重要。The inlet pressure corresponding to the strongest effect is different with different resonant chamber. the results can provide a basis for applying the resonant chamber to enhance heat transfer, which has practical significance on rebuilding lots of heat exchangers
這對將共振腔應用於換熱器上以提高換熱效果是一個很好的理論依據，特別是對改造工程領域中眾多的換熱器具有積極意義。On the 128 degrees rotated, y - cut and x - propagation substrate of linbo3, the interdigital saw transducer of 400um in electrode pitch and 100um in electrode strip is designed and fabricated by the technique of photolithography
在128度旋轉， y向切割， x向傳播的linbo _ 3晶片上，設計、並用光刻技術製作了電極周期為400 m ，電極線寬為100 m的叉指型表面彈性波換能器。分享友人