磁場壓制 的英文怎麼說
中文拼音 [cíchǎngyāzhì]
磁場壓制
英文
magnetic pressing-
The main products of our company : series of mining emulsion pump station, series of electric haulage shearer, sparying pump station, series of mining flame - proof vacuum / air electromagnetic starter, series of mining vacuum / air feeding switch, series of mining fame - proof and natural - safe. type ac soft starter, series of hydraulic stand valve and pipe system, high flow rate quick - moving valve, the new product nearing into market - the hydraulic support electric - control system, mining electric drill, hydraulic valve test table, electric performance test table
公司主導產品為：系列電牽引採煤機、系列礦用乳化液泵站、噴霧泵站、礦用隔爆兼本質安全型交流軟起動器、系列礦用隔爆真空、空氣電磁起動器、系列礦用真空、空氣饋電開關、系列液壓支架閥類及管路系統、大流量快速移架閥、即將投入市場的新產品? ?液壓支架電液控制系統、煤電鉆系列、液壓閥試驗臺、電性能試驗臺等。To avoid the serious electromagnetic interferer, the analog signals are transformed to frequency pulses which are transferred to the kernel of the system. in the measure of the groove voltage, the method of float - ground is adopted to avoid the high common signal and the range switch circuit is designed to solve the conflict of the wide dynamic range and the high precision. least square curvefit is adopted to reduce the system error
鋁電解生產現場電磁干擾非常嚴重，為此我們將需要測量的模擬信號就近轉換為頻率脈沖后再傳送到控制核心；採用浮地接入方式消除槽電壓信號中的共模成分；設計了量程自動切換電路以解決槽電壓的動態范圍寬和測量精度高的矛盾；用最小二乘法進行曲線擬和以降低測量的系統誤差。The bias magnetic field of the bias coil driven by bias current and small signal test current, results in the induced signal of the control coil. the terminal voltage of the control coil is detected by the test circuit. then the signal containing the information of rotor displacement is obtained, from which we can get the dc voltage signal proportional to the rotor displacement through half - wave rectification circuit and low pass circuit. this dc signal is put into a pid controller to get the control signal of the rotor displacement
偏置測試電路向偏置線圈輸入偏置電流和小信號測試電流，兩者產生的偏置磁場在控制線圈產生感應信號，檢測電路檢測控制線圈端電壓並提取含有轉子位移信息的電壓信號，該信號經半波整流電路和低通濾波電路后得到與轉子位移成正比例的直流信號，再由pid控制器轉換為轉子位移的控制信號，最後控制信號輸入功放電路產生控制電流，實現閉環控制。The stator of aceg is connected to the grid and the three symmetrical excitation windings in the rotor are fed by converter. the magnitude and frequency and phase and phase sequence of excitation voltage can be controlled, so the magnitude and position of excitation mmf as well as the speed of rotor can be controlled. therefore, acegs have superior performances by contrast with conventional synchronous generators and induction generators, such as upstanding stability, power generation of variable speed constant frequency ( vscf ), adjusting active power and reactive power independently, and absorbing lag reactive power deeply
交流勵磁發電機的基本結構與繞線式異步電機相同，其定子側接電網，轉子上採用三相對稱分佈的勵磁繞組，由變頻器提供對稱交流電勵磁，且勵磁電壓的幅值大小、頻率、相位、相序都可根據要求加以控制，從而可以控制發電機勵磁磁場大小、相對于轉子的位置和電機的轉速，使得交流勵磁發電機具有良好的穩定性及轉速適應能力、獨立的有功與無功調節能力和較強的進相運行能力，性能超越傳統同步發電機和感應發電機，因而有著廣闊的應用前景。Theory research based on overrelaxation : according to electromagnetic theory fundamental equation, boundary condition is analyzed, iterative formula is deduced, overrelaxation factor is selected and calculation program is composed. through calculation on varied parameter, a group of suitable parameter is found out. in the third chapter : the conclusion of theory research is verified through experiment
理論研究使用超鬆弛迭代法：根據麥克斯韋電磁理論基本方程，建立了磁場浙江大學博士學位論文：行程傳感液壓缸基礎技術的研究分析數學模型，分析了邊界條件，推導了迭代公式，確定了鬆弛因子，編制了運算程序，通過對不同參數的試算，找到了一組有規律參數之間的關系。This paper expatiated that the mathematics models of ac motor is higher order, non - linear and closed coupling, multivariable input - output system. and introduces the principle and the algorithm of sine pulse width modulation ( spwm ), opened - loop space voltage pulse width modulation control ( svpwm ) and field oriented control ( foc ). finally, realized the control strategies of variable - frequency speed regulating using assembly and c language
文中闡述了交流異步電機的數學模型是高階、非線性、強耦合的多變量輸入輸出系統，介紹了交流電機的正弦脈寬調制、開環電壓空間矢量的u / f控制和磁場定向控制的原理及控制演算法，並利用dsp構成控制系統，通過匯編語言和16位定點c語言混合編程的方法實現了上述的變頻調速控制策略。Now we are busy fitting and testing the asipp single - ion microbeam facility. the main work in this paper are as following : testing the performances of bend magnets and magnetic quadruple, simulating the course of beam - line transport, realizing the function of count of the number of radiated ions & control of the electronic beam shutter, calculating different voltage worked on the beam shutter of different beam - line, probing into some factors that may influence the controlling precision and providing some method to solve them
本課題所做的工作主要是對偏轉磁鐵、磁四極場進行性能測試和對束線的傳輸進行模擬計算；編程實現離子記數和束開關的控制；計算出使用不同束線時束開關上所應該加上的電壓值，並且對可能影響控制精度的因素進行了一些探討，並提出相應的解決方案。Adopting rotor field - oriented vector control methods, through which make the stator and the rotor magnetmotive forces can be kept orthogonal all along during operation of the bldcm, combining hysteresis current modulation ' s current control advantage and space voltage vector modulation ' s torque ripple attenuation advantage, then designing a sort of bldcm hysteresis current svpwm control method
摘要研究採用轉子磁場定向的矢量控制方法使無刷直流電動機定、轉子磁勢矢量始終保持正交，結合滯環調制電流控制和空間電壓矢量調制，設計了無刷直流電動機滯環電流svpwm控制方案。Some research about sensorless control of induction motors in recent years has been introduced in chapter one. in chapter two, a field - oriented control system with current regulator and voltage source inverter ( vsi ) is presented firstly, which is proved in theory that the voltage feed - forward decoupler can be omitted, the good decoupled control properties of flux current and torque current is also validated by experiments with speed - sensor based on f240dsp real system
論文第二章從異步電機的基本數學模型入手，介紹了一種基於轉子磁場定向的帶電流內環控制的電壓型逆變器輸出閉環矢量控制結構，在理論上證明了該模型可省略電壓前饋解耦環節，採用f240dsp晶元構建的帶速度傳感器實驗系統驗證了其定子電流勵磁分量和轉矩分量有良好的解耦控制特性。Using the microwave selective heating property for materials, by setup equivalent equation, and first time inducing the electromagnetic field perturbation theory to the design of heating materials for substrate in mpcvd, three temperature distribution modes were established, including temperature distribution comprehensive mode of inhomogeneous plasma, temperature distribution composite mode of composite substrate materials, temperature distribution perturbation mode of composite materials, which ii provided an whole new technology route to the design of substrate heating system in mpcvd and guided the preparation of heating materials for substrate. and then the heating materials for substrate were designed and optimized to obtain large area homogeneous temperature distribution even larger than substrate holder ' s diameter. as an important part, this thesis researched the nucleation and growth of diamond films in mpcvd, systematically researched the effects of substrate pretreatment, methane concentration, deposition pressure and substrate temperature etc experimental technologic parameters on diamond films " quality on ( 100 ) single crystal silicon substrate in the process of mpcvd, characterized the films qualities in laser raman spectra ( raman ), x - ray diffraction ( xrd ), scanning electron microscopy ( sem ), infrared transmission spectra ( ir ), atomic force microscopy ( afm ), determined the optimum parameters for mpcvd high quality diamond in the mpcvd - 4 mode system
該系統可通過沉積參數的精確控制，以控制沉積過程，減少金剛石膜生長過程中的缺陷，並採用光纖光譜儀檢測分析等離子體的可見光光譜以監測微波等離體化學氣相沉積過程；利用微波對材料的選擇加熱特性，通過構造等效方程，並首次將電磁場攝動理論引入到mpcvd的基片加熱材料的設計中，建立了非均勻等離子體溫度場綜合模型、復合介質基片材料的復合溫度場模型及復合介質材料溫度場攝動模型，為mpcvd的基片加熱系統設計提供了一條全新的技術路線以指導基片加熱材料的制備，並對基片加熱材料進行了設計和優選，以獲取大面積均勻的溫度場區，甚至獲得大於基片臺尺寸的均勻溫度區；作為研究重點之一，開展了微波等離體化學氣相沉積金剛石的成核與生長研究，系統地研究了在（ 100 ）單晶硅基片上mpcvd沉積金剛石膜的實驗過程中，基片預處理、甲烷濃度、沉積氣壓、基體溫度等不同實驗工藝參數對金剛石薄膜質量的影響，分別用raman光譜、 x射線衍射（ xrd ） 、掃描電鏡（ sem ） 、紅外透射光譜（ ir ） 、原子力顯微鏡（ afm ）對薄膜進行了表徵，確立了該系統上mpcvd金剛石膜的最佳的實驗工藝參數。The typical technology for ac motor control has vvvf, vsvf, vc and dtc etc. direct torque control ( dtc ) of asynchronous motors, which has been developed in the recent decades, is a power control method for motor drives
交流電機控制技術具有代表性的有調壓調頻控制、轉差頻率控制、磁場定向控制（矢量控制）以及隨后出現的直接轉矩控制（ dtc ）等。From the past research work, it has been known that the main mechanisms of spectral lines broadening in the atmospheres of stars are doppler broadening, spectral lines broadening by rotation and expending, pressure broadening ( stark broadening ), natural broadening, spectral lines broadening in magnetic field, sonic waves and alfv e n waves broadening, etc. but it is not enough to explain the recent observation phenomena by above theories of spectral lines broadening
以往的研究已經判明，在恆星大氣內譜線致寬的主要機制是多普勒致寬、自轉源或膨脹源引起的致寬、壓力致寬（斯塔克致寬） 、自然致寬、磁場引起的加寬、聲波及阿爾文波致寬等。然而，已有的譜線致寬理論不足以解釋最近的一些觀測現象，仍存在觀測值與理論值之間的差異。After studying a lot of documents, we present a speed - estimating method for direct torque control system. this method is based on the theory of dtc, but it takes advantage of the convenient of both the theory of dtc and the theory of foc. we need only to sample the stator ' s current to estimate the speed of the rotor, at the same time the integration of the voltage is avoided
在研究大量文獻的基礎上提出了一種適用於交流電機dtc控制系統的轉速計算方法，該方法以dtc控制為中心，結合dtc和定子磁場定向和轉子磁場定向各自的特點，綜合利用各自的有利之處，只需測量定子電流，避免了對電壓積分，思路清晰，計算簡單。This paper studies on used the ac servo system based on ti dsp ( lf2407a ) and the foc and digital signal processing thorem, achieves following results : algorithm. we employ svpwm ( space voltage pwm ) algorithm, improve the efficiency of the electric source, and decrease the harmonious elements. we build the mathematic model of the system and simulate it on matlab platform, dsigne segmented pid regulator to adapt variable speed and widen the speed range. measurement. the velocity and electric current measuring, we adopt multi - sampling - rate and digital filter principles. as more improvements we make, the whole system gets a good results. pc control. the complete controlling system can be controlled remotely. so we develop the pc controlling program.
採用磁場定向脈寬調制演算法，提高了電源利用率，降低了逆變電壓的諧波，改善了電機的運行特性，降低了對電網的污染；在matlab平臺上建立了交流永磁同步伺服電機和電壓空間矢量脈寬調制控制系統的數學模型，在模擬的基礎上，對傳統pid調節器進行了改進，提出轉速調節器和電流調節器採用分段pid結構，根據給定轉速所處的區間，自動選擇相應pid調節器的參數，拓寬了調速范圍，提高了控制精度。A pressure related mechanical measuring element diaphragm or bourdon tube provides the local display and simultaneously controls a magnetic - field dependent sensor
用一個壓力關聯機械測量元件膜片或波登管提供現場顯示，同時控制一個磁性傳感器。If we can prepare a mode of the electromagnetic field in an appropriately squeezed state, it will allow one to tune the signal - noise ratios of its quadrature components : one of the quadratures can be used to absorb the inevitable quantum - mechanical " noise ", while the other one serves to transmit an extremely well - defined signal
如果將電磁場的某一個模式制備在壓縮態，那麼就可以調節信噪比，使得一個正交分量可以用來吸收不可避免的量子力學噪聲，另一個正交分量用來很好的傳遞信號。那麼在量子電磁場中當系統的一些模式被制備在壓縮態時，就很有必要研究場的腔性質了。If by their ticket enforcement agencies use the power, control valves can be divided into pneumatic, electrical, fluid movement three, namely to compressed air to power sources pneumatic - valve to call for the engine electric control valves for the liquid medium ( such as oil ) pressure - driven electricity fluid moving control valves, and their functions and characteristics hours are electromagnetic valves, electronic style, smart, floor bus - control valves
如果按其所配執行機構使用的動力，控制閥可以分為氣動、電動、液動三種，即以壓縮空氣為動力源的氣動調節閥，以電為動力源的電動控制閥，以液體介質（如油等）壓力為動力的電液動控制閥，另外，按其功能和特性分，還有電磁閥、電子式、智能式、現場總線型控制閥等。分享友人