管間變壓器 的英文怎麼說
中文拼音 [guǎnjiānbiànyāqì]
管間變壓器
英文
intervalve transformer-
Meixing electronics factory is major in the vacuum tube stereo power amplifier, which is located in the nanhai city ， owned a workhouse over 1300 square meter, with five plant, they are box, seal and transformer circling 、 debugging & check, we also have the machine process, such as milling machine 、 punch 、 drill press 、 electric welding 、 matrix 、 incision machine, and radio tube test machine. we have realize the product line manufacture, the monthly whole output is over 200 sets
美星電子是一個專業製造真空管身歷聲功率放大器的加工廠，位於廣東南海市黃岐工業區，擁有廠房一千三百平方米，工廠分機箱加工、焊接組裝、變壓器繞制、煲機老化、調試檢測五個車間，機械加工設備擁有銑床、沖床、創床、鉆床、電焊、模具製作、切割等二十多臺，電子管及整機檢測調試儀器十餘臺，該廠實現了配套設備、流水作業，每月可生產膽機二百臺以上，可謂中國專業生產膽機最大規模的工廠。Transformers and reactors - part 14 : external protective spark gaps on bushings
變壓器與電抗器.第14部分:套管的外部保護火花間隙The transformer isolates the transistors with regard to d-c bias voltage.
變壓器可在兩個晶體管之間隔離直流偏壓。Many factors have effect on irrigation uniformity. with the growing of pressure, how is irrigation uniformity of trickle irrigation varying on different condition of the diameter of drip line, the distance of emitters, the length of drip line, the style of emitters, the flux ratio of emitters and the face gradient of little irrigation district. the consequence shows that pressure has puny effect on irrigation uniformity
滴灌系統的灌水均勻度受眾多因素的影響，本文通過毛管的管徑、滴頭間距、毛管的管長、灌水器的類型和灌水器的流量系數不同的情況下，灌水均勻度隨壓力水頭變化模擬結果顯示，壓力水頭對灌水均勻度影響非常小。A nonlinear mathematical model is developed to determine the flow rate distribution in the parallel tubes of boiler superheater and reheater by depending on the relation of pressure drop among individual tubes and accounting for the static pressure variations in the inlet and outlet headers
根據並聯管組各根管子進、出口壓力降之間的關系，並考慮到分配集箱與匯集集箱中流體的靜壓變化，建立了鍋爐過熱器、再熱器流量分配的非線性數學模型。High - frequency link power converters are receiving increasing attention. when the input frequency of ac - ac converter is quite high, such as 20khz or above, in order to make sure the converter switching action is restricted to the zero crossing point of the link voltage, the switching cycle becomes discrete pulse spectrums, however, the conventional pwm converters are ruled out because they would fail either to the efficiency or the low - distortion criteria
當交-交變頻器的輸入頻率非常高，通常為20khz時，為了在零電壓條件下實現逆變器開關管的通斷，變換器的開關時刻必須選擇在高頻交流電壓脈沖為零時，這意味著變換器開關時刻在時間軸上成為不連續的點，而常規的硬開關pwm變換器是將開關時刻選擇在任意時刻。The gas feed automation system, which includes field instruments, gas feed controller, wireless remote supervising system, and so on, will realize following functions : gas flow measurement, gas pressure and temperature measurement, gas flow control, gas pressure regulation, intermittent gas lift, wireless remote monitoring, and etc. this paper will discuss the following content in detail : first part is introduction
該自控系統包括現場變送儀表、氣舉配氣控制器和無線遠程監控等，主要完成天然氣流量計量、氣體壓力溫度檢測、天然氣流量控制、管道干壓調節、間歇氣舉以及遠程監控等功能。本文將會重點介紹以下內容：首先是概述部分，簡要介紹了氣舉採油技術和氣舉配氣系統的地位和現存問題，並介紹了配氣自控系統的主要性能和優點。The auxiliary switch conducts when the two main switch turn off, and it also operates at zcs conditions. this switch not only helps the main switches achieve zvs, furthermore, it eliminates the oscillation between the transformer leakage inductance and the junction capacitance of two switches
輔助開關管為主開關管實現zvs創造了條件，同時輔助開關管在主開關管關閉期間實現zcs導通，大大減輕了變壓器漏感和主開關管結電容之間的振蕩。At the initial stage of planar technique, b was employed as ideal diffusion impurity in base - region of npn si planar devices because of the match of its solid - solubility and diffusion coefficient in si with those of p in emission - region, and the good shield effect of sio2 film to b. but because of the relatively large solubility ( 5 1020 / cm3 at 1000 ) and the small diffusion coefficient, the linear slowly - changed distribution of acceptor b in pn junction can not be formed, which could not cater to the requirement of high - reversal - voltage devics. thereafter b - a1 paste - layer diffusion technology and close - tube ga - diffusion technology had been developed, while the former can lead to relatively large the base - region deviation and abruptly varied region in si, which caused severe decentralization of current amplification parameter, bad thermal stability and high tr ; the latter needed the relatively difficult pack technique, with poor repeatability, high rejection ratio, and poor diffusion quality and productio n efficiency
在平面工藝初期，由於b在硅中的固溶度、擴散系數與n型發射區的磷相匹配， sio _ 2對其又有良好的掩蔽作用，早被選為npn硅平面器件的理想基區擴散源，但b在硅中的固溶度大（ 1000時達到5 10 ~ （ 20 ） ，擴散系數小， b在硅中的雜質分佈不易形成pn結中雜質的線性緩變分佈，導致器件不能滿足高反壓的要求，隨之又出現了硼鋁塗層擴散工藝和閉管擴鎵工藝，前者會引起較大的基區偏差，雜質在硅內存在突變區域，導致放大系數分散嚴重，下降時間t _ f值較高，熱穩定性差；後者需要難度較大的真空封管技術，工藝重復性差，報廢率高，在擴散質量、生產效率諸方面均不能令人滿意。In the system, the low voltage power line is the first signal tunnel without any other relay equipments between customer terminal and substation collector, public telephone line serves as the second signal tunnel between substation and management center computer. as a breakthrough of conventional concept of electricity meter, this thesis initiate a new concept, namely, intelligent power customer terminal ( shortly, customer terminal ), which is developed with spread spectrum plc communication functional and possesses many advanced functions, such as, in addition to electric energy acquisition, guarding against electricity pilfering, preventing wrong connection, protecting malfunction, remote communication ( for example, remote power supply or halt, remote configuration of electricity meter, remote load control, etc ), and so on
本文首先系統地總結了目前國內外低壓電力網數據傳輸技術的研究現狀和存在的問題，在此基礎上，從理論上論證了在低壓電網上應用擴頻載波數據通信技術的可行性和優越性，並重點論述了擴頻載波技術抗電力線噪聲干擾的機埋；本文提出了一個新穎的基於低壓電力線擴頻載波通信技術的集中遠抄系統的總體方案，即由用戶終端、集中器和電能管理系統所組成的網路系統，其中，用戶終端到配變集中器用低壓電力線作為通道，中間無需其他硬體中繼設備，集中器到電能管理系統用公用電話網作為通道。In this paper, the bias - magnetic of ppfc and the parameters effect on the bias - magnetic are all studied. firstly, the bias - magnetic principle of ambipolar converter and some basic relations are analysed under two different conditions ( different von and different ton )
首先在導致偏磁的兩種情況下（管壓降不同和導通時間不同）下，從理論上分析了雙極性變換器變壓器偏磁原理及基本關系。Accordingly this thesis conducts research on the design and management of swimming pools from the running management of its disinfection, reasons and precautionary measures of its water quality mutation in summers and autumns and its water - saving and energy saving. through the participation of the field running management, the literature search, the actual running experience and the theoretical analysis, this thesis forwards drainage & water supply optimization rules for swimming pools. based on field investigation and research on the filtration speed improvement in pressure filters, it is pointed out that there is a wide filtration speed improvement range in pressure filters
鑒此，該課題從消毒殺菌的運行與管理、夏秋季游泳池水質突變的原因及防治措施以及運行過程中節水節能措施等三個方面對游泳池的運行管理模式進行了研究；通過參與現場管理與文獻資料的研究，結合實踐經驗，進行理論分析，提出了游泳池給水排水的優化設計原則；經現場測試，對壓力過濾器提速進行了研究，指出相對于目前規范值有較大提速潛力；討論分析設計了大型多功能游泳場館水處理間自動化控制管理系統。The thesis has done the widespread investigation and study to the domestic and foreign ’ s technologies of analogy low voltage and low power, and analyzes the principles of work, merts and shortcomings of these technologies, based on the absorption of these technologies, it designs a 1. 5v low power rail - to - rail cmos operational amplifier. when designing input stage, in order to enable the input common mode voltage range to achieve rail - to - rail, it does not use the traditional differential input pair, but use the nmos tube and the pmos tube parallel supplementary differential input pair to the structure, and uses the proportional current mirror technology to realize the constant transconductance of input stage. in the middle gain stage design, the current mirror load does not use the traditional standard cascode structure, but uses the low voltage, wide - swing casecode structure which is suitable to work in low voltage. when designing output stage, in order to enhance the efficiency, it uses the push - pull common source stage amplifier as the output stage, the output voltage swing basically reached rail - to - rail. the thesis changes the design of the traditional normal source based on the operational amplifier, uses the differential amplifier with current mirror load to design a normal current source. the normal current source provides the stable bias current and the bias voltage to the operational amplifier, so the stability of operational amplifier is guaranteed. the thesis uses the miller compensate technology with a adjusting zero resistance to compensate the operational amplifier
本論文對國內外的模擬低電壓低功耗技術做了廣泛的調查研究，分析了這些技術的工作原理和優缺點，在吸收這些技術成果基礎上設計了一個1 . 5v低功耗軌至軌cmos運算放大器。在設計輸入級時，為了使輸入共模電壓范圍達到軌至軌，不是採用傳統的差動輸入結構，而是採用了nmos管和pmos管並聯的互補差動輸入對結構，並採用成比例的電流鏡技術實現了輸入級跨導的恆定;在中間增益級設計中，電流鏡負載並不是採用傳統的標準共源共柵結構，而是採用了適合在低壓工作的低壓寬擺幅共源共柵結構;在輸出級設計時，為了提高效率，採用了推挽共源級放大器作為輸出級，輸出電壓擺幅基本上達到了軌至軌;本論文改變傳統基準源基於運放的設計，採用了帶電流鏡負載的差分放大器設計了一個基準電流源，給運放提供穩定的偏置電流和偏置電壓，保證了運放的穩定性;並採用了帶調零電阻的密勒補償技術對運放進行頻率補償。The ml converter splits voltage constraints among series - connected switches through the flying capacitors, so keeping the flying capacitor voltages at proper value is very important
該變換器利用飛跨電容使得輸入電壓在串聯的各開關管之間均分，以降低開關管的電壓應力，因此飛跨電容電壓保持在適當值是保證變換器正常工作且具有良好性能的關鍵。The ml converter is a multi - input and multi - output, strongly coupled nonlinearly system, its control elements ( duty cycles ) and the controlled elements ( output voltage and flying capacitor voltages ) of the ml converter are strongly coupled, so the system should be decoupled to multiple single - input and single - output sub - systems such that each output can be controlled independently
多電平變換器的控制量（各開關管占空比）和被控量（輸出電壓及各飛跨電容電壓）之間存在耦合關系，它是一個多輸入多輸出、強耦合的非線性系統，因此需要將其解耦成多個單輸入單輸出系統，以對被控量進行獨立的閉環控制。In this paper, i analyze the practical condition of the cad applied to the transformer, make some researches on the primary technology of the expert system based on the forward chaining, on the modeling technology based on the assemble feature, on the design ideal based on the parametric drawing, on the principal of the database. i develop the practical cad software system about the transformer structural project based on the previous principal and ideal, applying to the vc + + system and the regeneration development tool of the autocad system. the system establishes the foundation for the integration of the transformer design information, reduce the time of the transformer design, increase the design efficiency and the economic effectivity of the enterprise, and have a great applicational value
本論文分析了cad在變電設備行業中運用的實際情況，先後研究了基於正向推理的專家系統的基本技術，研究了裝配特徵的造型技術，研究了參數化繪圖的設計思想，研究了數據庫管理的基本思想；在vc + +環境下和autocad二次開發工具objectarx的基礎上，開發了基於上述技術和思想的變壓器結構方案cad應用軟體系統，為變壓器製造業的信息化和系統設計的集成奠定了基礎，在一定程度上能減少變壓器總體設計時間，提高企業的設計效率，能為企業帶來較大的經濟效益，具有較大的應用價值。According to the following design theory : the dsp calculates in real time and produces three phases spwm waves to control the on or off of the 6 igbts in ipm respectively. ipm then inverts the commutated single phase direct current ( insulated gate bipolar transistor ) into three phases alternating current. when modulated signals of spwm are changed, the on - off time of switches also changes, so as to the voltage and frequency of output signals
本文提出了一種基於dsp （數字信號處理器tms320f240 ）的通用的三相間接變頻電源系統，利用分段同步調製法和混合查表法，實時計算不同頻率下的采樣周期、電壓幅值、輸出脈寬，產生雙極性spwm波形，經驅動放大後用于ipm （ intelligentpowermodule ）中的絕緣柵雙極型晶體管柵級驅動，以控制電源的輸出電壓和頻率，實現變頻電源的智能數字控制。Three kinds of the usual methods of rotor flux estimation are compared and analyzed, and the method of rotor flux estimation based on the voltage model is studied in detail. and the output phase voltage is reconstructed by means of the dc - bus voltage and the switching states of the inverter, the effect of the dead time and saturating voltage - drop of the switches on flux estimation is discussed. and the method of synchronizing instant speed identification is also studied deeply
本文對三種常用的轉子磁鏈觀測方法進行了對比分析，在此基礎上著重研究了基於電壓模型磁鏈觀測方法，分析了利用直流母線電壓和逆變器三相開關管的狀態進行輸出電壓重構方法，討論了死區時間和開關管飽和壓降對磁鏈觀測結果的影響，深入研究了同步瞬時轉速辨識方法。Two abb frequency converters and a siemens programmable logic controller ( plc ) are with the lower - level computer and industry computer are with the host computer. the communication between with the host computer and low - level computer not only translate the system condition, but also send the control instruction. the system condition is shown with chinese window in the host computer, and the constant stress function is realized through the frequency converter part
2臺變頻器和plc作為下位機設備，工控機作為上位機集中控制，上下位機之間通過通訊，把系統當前狀態、當前給定通過上位機來綜合判斷，並通過上位機以漢化界面形式予以顯示，而下位機的變頻部分則實現管網的恆壓功能， plc實現4臺水泵機組邏輯控制和定期巡檢，及部分故障綜合報告。分享友人