零位電壓 的英文怎麼說
中文拼音 [língwèidiànyā]
零位電壓
英文
electrical null-
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。The company is located at zhejiang ningbo technology park and it engages mainly in the smelting equipment of magnesium and aluminum allo y, quantitative conveying ana pouring equipment, gas protection device and the magnesium alloy pressure casting parts. the more, it can provide services of technology development, achievements transferring, process revamping, material inspection, computer stimulation, etc. the company is based on the strong technical strength of the military technology and the research institutes and has a large number of senior research personnel. the company owns many patents and know - hows, among which the magnesium alloy smelting, gas protection, quantitative pouringas well as the later on processing technology has reached the world advanced levet. the company sticks to aim of quality first, credit supreme and would like to provide best
公司位於浙江省寧波市科技園區凌雲路199號，是以生產鎂合金鑄件為主業，包括壓鑄低壓鑄造等，並具備技術開發成果轉化等功能的綜合性科技公司，以兵器工業和科研院所的雄厚實力為依託，擁有自主知識產權的多項專利專有技術和國際一流的技術裝備，擁有教授博士碩士等高級專業研究人員數名在鎂合金鑄造產品研製及后續加工方面，我公司擁有技術領先優勢，目前我公司為電動工具汽車摩托車零部件it行業以及軍工方面提供配套產品配套設備技術咨詢與技術服務技術轉讓及聯合開發，還可以進行工藝改造材料檢測檢驗計算機模擬等多項服務By high frequency injection method and a kind of magnetic anisotropy of pmsm, the rotor saliency position can be calculated in the pmsm sensorless vector control system
摘要通過注入特定的高頻電壓信號，利用電機的各向異性以確定轉子的凸極位置，在同步電機無傳感器矢量控制中，對包括零速度在內的所有速度下都能獲得精確的轉子位置信息。Piezoelectric elements were bonded on the plate as actuators and the input voltage of each actuator was determined by the velocity of its position and volume velocity of the plate was made zero, through which the sound radiation from the plate could be controlled
在簡支薄板表面粘貼壓電片作為致動器，根據所處位置的速度確定輸入控制電壓，並使平板的體積速度為零，從而達到控制聲輻射的目的。Remember the following words and expressions : e. g. multimeter ； circuit ， current ； voltage ； resistance ； digital multimeter ； analogue multimeter ； analogue multimeter scales ； zero adjustment control ； zero adjustment control for resistance ranges ； measurement ranges switch ； transistor test socket ； meter probe ； positive terminal ； negative terminal ； anode ； cathode ； red lead ； black lead ； power supply ； connect in parallel ； connect in series
記住萬用表、電路、電流、電壓、電阻、數字萬用表、模擬萬用表、表頭、機械零位調整器、歐姆零位調整器、量程選擇開關、晶體管插孔、表棒、正接線端、負接線端、陽極、陰極、紅導線、黑導線、電源、並聯、串聯等常用英文單詞，並逐步掌握。Then one of the methods of rotor position detection - bemf zero crossing point detection is explained in detail. in succession, the chapter dissertates the method of measuring phase voltage and supply voltage, and analyses the error of rotor position using this method
對轉子位置檢測方法中的反電勢過零點法作了比較詳細的介紹，討論了反電勢法中相電壓和端電壓的檢測方法，並分析了利用該方法時而產生的轉子位置檢測誤差。Second, as currently study of hot point, back ? emf, it will discuss the principle of the sub - position examination in detail. based on the principle, it put forward a kind of improving back - emf method of crossing - zero checking turns position. but this did n ' t resolve to the root problem that the speed scope is very narrow and it need an in expiation of speed error and so on. thus it put forward a new improvement method at next chapter
其次，就目前所研究的熱點? ?反電勢法，詳細討論了其轉子位置檢測的原理，在此基礎上提出了一種改進的反電勢過零點檢測方法，其可直接從電機端部得出反電勢對地的電壓值，而不是通過電機中心點電壓來得到反電勢。In ac circuits, the power consumed in a circuit will be zero if the voltages and currents are exactly90degrees out of phase with each other
在交流電路中，若電壓、電流相位正好相差90 ，則電路上消耗的功率為零。The following is the main works and conclusions of this thesis. the novel upfc needs high power rate because it is generally used in high voltage transmission lines. after studied high - power converters and the literatures of upfc, the main circuit topology of novel upfc base on diode - clamping multilevel inverter is presented and the principle of using novel upfc to eliminate zero sequence and negative sequence currents is analyzed
本文所做的主要工作及得出的主要結論如下：由於upfc一般用於高壓輸電線，其功率等級要求很高，在綜合研究大功率變換器和upfc現有文獻的基礎上，提出了基於二極體箝位多電平變換器的新型upfc的主電路拓撲，分析了用其來濾出高壓輸電線非全相運行時所產生的零序和負序電流的原理。The program is written by assemble language to control the movement of the vacuum circuit breaker with pma. the program also can monitor the environmental temperature, control voltage, closing displacement, zero point of contactor voltage
用匯編語言編製程序對配永磁機構的真空斷路器的分、合閘進行控制，同時對其運行的環境溫度、控制電壓、合閘位移和觸頭間隙電壓過零點等狀態進行實時監測。The clamping diodes conduct only once in a switching period, and the resonant inductance current is smaller in zero state, leading to a higher efficiency and reduced duty cycle loss. the operation principle of the improved converter and the comparison with the original converter are analyzed in this paper. the effect of the blocking capacitor in series with the transformer or resonant inductance is discussed, and a best scheme is determined
本文將諧振電感和變壓器交換位置，使變壓器與滯后橋臂相連，這樣箝位二極體在一個開關周期中只導通一次，同時零狀態時諧振電感電流較小，有利於提高變換效率和減小占空比丟失，本文分析改進后變換器的工作原理，並與改進前的變換器進行對比，討論隔直電容在不同位置對變換器工作的影響，確定一種最佳工程方案。The system is based on chopper constant current drive technique, according to the top level design idea, adopting advanced specical subdivision control integrate circuit and powerful function 80c196kc to organize the system frame, desiging the minimum system of single - chip microcomputer, multifunction i / o interface circuit, relay switch circuit, keyboard and display circuit, multifunction digital setting interface circuit and so on, utilizing the hso and hsi interface circuit which are owned by this single - chip microcomputer exclusively and its powerful command system to realize dual - degree switch control, automation orientation, automatically searching zero position, locking machine when stopping, frequency to set digitally, automatically adjusting speed through changing frequency, swithing subdivision or squarewave control, on the basis of above, the system also have the function of running according to the setting steps and the frequency, voltage and current to display through the led, etc
系統基於斬波恆流驅動技術，按照頂層設計思想，採用先進的專用細分控制電路和功能強大的80c196kc單片機來組建系統構架，設計了單片機最小系統、多功能i o介面電路、繼電器切換電路、鍵盤顯示電路和多功能數字設定介面電路等，利用該單片機獨有的hso和hsi介面及其強大的指令系統，實現了雙余度混合式步進電動機的余度切換控制、自動定位、零位自動搜索、停機鎖定、數字化頻率設定、自動調頻變速控制、細分方波切換控制，在此基礎上，該系統還設有按預置步運行、 led頻率電壓相電流顯示等功能。4. the hardware of electronic control system is developed. it includes display module whose tasks are man - machine interaction, displaying humidity and temperature, setting humidity, time, date and week, communicating with computer ; power device module which provides power of all modules and drives control equipments to accomplish intention of main control module and can provide zero crossing protection circuit, excess voltage and under voltage protection circuit and excess current protection circuit ; water sensor group, the responsibilities of which are testing the states of water and send the states to scm, then the scm control the water level after judging the states
開發並實現了電控系統的硬體部分，包括顯示模塊：主要負責人機交互，顯示濕度、溫度，修改濕度、時間、日期、星期，和主控模塊通訊；電源驅動模塊：主要提供各個模塊的電源，驅動被控設備，實現主控模塊的意圖，並能實現繼電器的過零保護，過流、過壓、欠壓保護；水位傳感器組：負責測知水位的狀態，並把此狀態送入單片機，單片機經過判斷、處理反過來控制水位，實現水位的閉環控制。Then, based on the estimation algorithm decomposing the measurement of voltage scope and power scope, the problems of the location of transformation tap settings and the tide current estimation of zero - impedance branches in state estimation are solved ; and detection and identification of bad data in state estimation are deduced and stimulated, also a hybrid method of detection and identification is brought forward
隨后，在基於分解電壓測量量和功率測量量的估計演算法的基礎上，對狀態估計中經常出現的變壓器抽頭位置問題和零阻抗支路潮流估計問題進行了分析和處理；對狀態估計的不良數據檢測與識別方法進行了推導和模擬，並提出了一種混合檢測方法。In this thesis, the tradition phase - shift full - bridge zvs dc / dc converter are analyzed, and then a new dc / dc full - bridge converter employing switches clamping in secondary side of transformer is proposed, and the converter employing saturable inductor clamping are studied, and zvs ( zero - voltage - switching ) can be easily achieve by experiment validate
本文分析了一些傳統的移相全橋軟開關變換器，提出了開關管箝位dc dc全橋變換器拓撲方案，並對飽和電感器箝位dc dc全橋變換器進行了研究，並進行實驗驗證，從而解決了開關管的零電壓開關問題。At last, the experiment result proved the effectiveness of the spectrum rebuilding technology. the experiment result show that the wavelength detection accuracy is improved by an order of magnitude using the spectrum rebuilding technology compared with that obtained from direct peak search. some other schemes to enhance the accuracy are illustrated
最後列舉了其它幾種提高測量精度的方案，包括關鍵器件可調諧濾波器的位置變化提高信噪比，調整探測器pinfet的輸出電壓的零點以提高a / d採集卡的利用率，以及採用系統參考消除系統誤差造成的波長漂移。Reactive power are calculated using the new algorithm. on the basis of analyzing different kinds of control strategies of var compensation, the paper applies the criterion of voltage and var to control switching and illustrates a improved mode of switching capacitor which can prevent the switched - capacitor from the impacting of instantaneous rush currents by means of zero - crossing triggering of scr components, and can realize auto - tracking var and auto - switching shunt capacitor bank. initial operating parameters are stored in information flash memory of the mcu using flash self - programming technique in order to decrease complexity of the circuit and improve stability
高壓智能無功補償控制器以flash型16位單片機msp430f149為控制核心，採用了一種相角實時測量的新演算法，並在此基礎上計算出了功率因數、有功和無功，減少了運算量提高了精度；在分析了各種無功補償控制策略的基礎上，以母線電壓和無功功率復合判據控制投切，並提出一種改進的電容器投切方式? ?暫態投切控制晶閘管過零觸發，避免了電容器投切時的電流沖擊；穩態運行時接觸器替代晶閘管，實現無功補償的自動跟蹤和電容器的自動投切，解決了投切時的暫態電流沖擊和穩態時可靠運行的難題；控制器的原始運行參數採用flash自編程技術，將其保存在msp430f149片內的信息flash中，簡化了硬體電路，大大提高了系統的可靠性。This thesis analyzes the zero - crossing distortion, and points out that the major causes are the inductor and the phase displacement between the input current and the input voltage. several methods are proposed and verified by simulation
本文對產生輸入電流過零畸變的各種原因進行了定量分析，指出電感和輸入電流與輸入電壓間的相位差是影響高頻輸入下輸入電流過零畸變嚴重的根本原因。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定工作狀態，詳細分析了帶lcd無損箝位網路的並?並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了零電壓關斷，並介紹了該電路拓撲的特點和lcd網路參數設計，採用pspice軟體進行了模擬和分析，最後，研製出一臺2 . 3kw樣機。In this paper, the real - time detecting method for harmonic current need only that the constructed voltage system be in step with the real voltage system ( which can be obtained by cross - zero detection to voltage waveform ), meanwhile, we have testified in concerned chapter that the phase is not important for the constructed voltage system
本文所提出的諧波電流實時檢測方法，其前提只是要求構造系統與原有電壓系統同步（這可以通過對電壓波形的過零檢測來實現） ，而對于構造系統的相位卻沒有嚴格的要求，本文並在相應位置給予了其證明。分享友人