x
uploads/snubber.jpg

snubber n.1.突然制止[阻止]的人;斷然拒絕的人;責罵人的人。...

snubby

Two kinds of common used snubber circuits are studied through simulation and experiment . it is pointed out that the rcd snubber has less power loss . increasing the turn ratio of transformer is helpful for the energy , which is stored in the primary side of transformer , to be transferred to the secondary side 通過實驗和仿真,對比研究了電路中周波變換器的兩種常用的緩沖電路,指出采用rcd緩沖電路損耗更小;提高變壓器匝比有利于減小鐵芯儲能的回饋,提高逆變器變換效率,但它同時也增加了副邊功率管的電壓應力,必須綜合兩方面確定合理的匝比。

The principle of operation , the selection of snubber circuit , the design of the coupling inductor and the relationship between the dc / dc and dc / ac converters are illustrated and verified on a 1kw experimental circuit . a two - stage dc / dc converter consists of a boost and ppfc is presented in this paper through further research 文章詳細分析了電路工作過程,給出了緩沖電路的選取原則及耦合電感的設計,討論了該ppfc與后級dc / ac逆變器連接工作時的相互影響,并通過仿真分析和一臺1000w實驗樣機進行了原理驗證。

At last , a novel zvs isolated boost converter is presented . this converter is employed the lcd snubber circuits and coupled winding in boost inductance , the switches can realize zero voltage turn off and the surge voltage of switch is low . the principle of this converter is analyzed in detail 最后深入研究了一種適合于低壓大電流輸入場合的隔離型boost變換器,分析了它的優點和缺點,在此基礎上提出了一種新型隔離型zvsboost變換器,詳細分析了其工作原理,給出了參數設計,仿真和樣機實驗結果驗證了方案的正確性。

This paper introduces the fundamental and characteristic of the fuel cell , analyzes the necessity and detail scheme of adding assistant energy sources to the fuel cell power generation system . considering for the special demand of the fuel cell power generation system , this paper gives out a push pull forward converter ( ppfc ) with passive and lossless dual cdd snubber circuit 本文首先闡述了燃料電池的基本原理和性能特點,分析了在燃料電池發電系統中引入輔助能源系統的必要性及具體的配置方案,然后針對燃料電池發電系統對dc / dc變換器設計的特殊要求,提出了一種加雙cdd無源無損緩沖電路的推挽正激變換器( pushpullforwardconverter , ppfc ) 。

Then the operation principle of the device is introduced to the readers and the definition of the limiting rate of the fault current and the compensation degree of the series reactance is done . in this section , the author designs the snubber circuit and the gate drive circuit of the gto 首先,在總結前人研究成果的基礎上,提出了pwm - fcl的拓撲結構,并對其工作原理進行了闡述,給出了限流度以及補償度的定義,并針對gto的特性,設計了其緩沖保護電路和門極驅動電路。

In this paper , two different passive snubber cells are proposed . by using the proposed snubber cells , the turn - on di / dt was restrained by a small inductor , and the turn - off dv / dt was restrained by a small capacitor . based on those two snubber cells , a new family of converters was introduced and an advanced pfc converter was designed 本文提出了兩種新型無源無損的緩沖電路單元,通過使用該緩沖電路單元,主開關開通時所產生的di dt被一個較小電感所限制,主開關關斷時所產生的dv dt被一個小電容所限制,從而實現了主開關器件的軟開關變換。

Cpld software and the peripheral hardware designs are analyzed in detail . simulation - and experimental results verify the performance , the problems are analyzed as well . because it has the function of auto - adjusting of the pulse sequence , it improves the reliability of the system and it is a good snubber interface between regulator and main circuit 本文研究了以cpld和鎖相環技術為核心的新型通用數字觸發器,詳細分析了cpld軟件及其外圍硬件電路的設計,用仿真與實驗結果驗證了該觸發器的性能,并對存在的問題進行了分析,由于觸發脈沖可以自動適應不同的輸入電源相序,從而提高了系統工作的可靠性,在調節器與大功率主電路之間形成了一個很好的緩沖接口。

In this thesis , a clamp passive loseless snubber is put forward for igbt inverters after analysing the dissipation of hard switching and soft switching with snubber . then theoretical analysis and simulation are been take to prove the work of the snubber . and a real inverter circuit and its auxiliary circuits are built 本文在對igbt在硬開關和有緩沖電路的軟開關情況下的開關損耗進行分析之后,提出一種適用于igbt逆變橋的鉗位式無源無損緩沖電路,然后進行了理論分析和仿真分析,并制作了實驗電路和相關輔助電路。

Thirdly , the snubbers are designed to compress the switching voltage transient . when igbt is abruptly turned off , trapped energy in the circuit stray inductance is dissipated in igbt , causing a voltage overshoot and damaging igbt . this paper analyzes the principle of the snubber and discusses the impact of the parameters of the snubber on voltage overshoot 針對igbt工作過程中出現的電壓尖峰、電流尖峰和大的開關損耗問題,本文首先從理論上詳細分析了igbt逆變橋緩沖電路的工作原理,推導出緩沖電路各元件的參數計算公式,討論了緩沖電路各元件參數對關斷電壓波形的影響并進行了仿真分析。

The emc of dc pwm power amplifier is analyzed and several measures to restrain the disturbances of pwm power amplifier are put forward . based on the pwm power amplifier in existence , the rcd snubber circuit experiment is carried out and the result shows that the rcd snubber circuit can restrain the voltage surge and the disturbances of dv / dt , di / dt 對直流pwm功率放大器的電磁兼容性進行了分析,提出了抑制pwm功率放大器干擾的幾種措施;在現有的pwm功率放大器上做了rcd吸收電路實驗,實驗結果表明, rcd吸收電路能有效抑制電機兩端電壓浪涌和dv dt , di dt引起的電磁干擾。

Based on studying of the multi - level technique , a variable frequency speed regulation system based on the diode clamped three - level inverter is introduced in this thesis in detail . it includes ac - dc - ac main power circuit , snubber circuit , isolated driving circuit by optical fibre , delay time circuit on powering , sampling circuit of current and voltage , protection circuit and etc . a distributed power system ( dps ) which can reinforced the system ’ s security is developed to solve the power supply of the whole system 本文在研究多電平技術的基礎上,研制了一套以二極管箝位式三電平逆變器為基礎的變頻調速系統,包括:交-直-交主功率電路,緩沖電路,光纖隔離驅動電路,上電緩沖延時電路,電流、電壓采樣電路,保護電路等。

First , this paper analyzes the principle of the snubber circuit of igbt inverter in detail , and the parameter of the snubber circuit components are derived . it also analyzes the twice voltage peak of the snubber circuit during the period of turnoff and discusses the impact of the parameter of the snubber circuit components on the waveform of turnoff . the reference materials for the snubber circuit design are proivided theoretically in this paper . futhermore . it analyzes a soft switching circuit that suits pulse power supply 本文首先從理論上詳細分析了igbt逆變橋緩沖電路的工作原理,推導出緩沖電路各元件的參數計算公式,分析了緩沖電路在關斷過程中的兩次電壓尖峰,討論了緩沖電路各元件參數對關斷電壓波形的影響,為緩沖電路的設計提供了理論上的依據。

Abstract : on the basis of analyzing the current some kinds of resonant snubber and soft switched circuits , a new type of single phase commuted resonant snubber and its control method are implemented . since the resonant snubber can achieve soft switch condition for the inverter when only single phase is commuted , the control method of the inverter is very similar to the normal inverter . it is proved that the simulated results well agree with the circuit topology and the control method 文摘:在分析目前軟開關電路以及諧振緩沖器的發展現狀基礎上,提出了一種具有單相換相特點的諧振緩沖器,在其作用下,逆變器工作在零電壓開關環境下.論文分析了所設計的諧振緩沖器的工作原理以及控制規律,仿真結果證明了電路拓撲以及控制方案的可行性

The paper analyzed the dynamic process of series thyristor in detail and designed the snubber circuit and bod protecting circuit against over - voltage for thyristor . a pspice simulation mode of series thyristor based on dynamic process is set up and the simulation verifies the validity of the snubber circuit 論文詳細分析了多個晶閘管元件串聯工作的動態過程,設計了晶閘管的吸收電路和過壓保護電路,建立了反映多個晶閘管元件串聯工作動態過程的pspice仿真模型,并通過仿真分析驗證了所設計電路的有效性。

In this part , the high - frequency series inverter with resonant pole capacitor is introduced mainly . the current - exchanging processes of the inverter in different working modes are analyzed , how to reduce the switching loss is discussed , and the calculating methods of snubber capacitor c , factor angle switching frequency and pulse width pw are given in optimum switching process . and results of simulation and experiment verify the validity of theoretic analysis 接著重點研究了含有諧振極無損緩沖電容的逆變器,對其換流過程中的不同工作狀態進行分析,討論了如何減小逆變器的開關損耗,給出了最佳工作狀態下緩沖電容c 、感性角、開關頻率、觸發脈沖的脈寬pw的詳細計算方法,并通過大量的仿真和實驗波形證明了理論分析的正確性。

This paper simulates and analyses the torque pulsation because of the modulation frequency and speed variation under ambipolar pulse width modulation ; the influence of snubber circuit , dead time effects , and modulation frequency to igbt pwm inverterbridge is taken into account , too 本文對雙極性調制的無刷直流電動機仿真,分析了轉速和調制頻率對轉矩影響;并綜合考慮緩沖電路、控制死區及載波頻率對pwm逆變電路中igbt開關損耗的影響。

In the other , the paper analyses the working procedure and the working principle of the snubber circuit of the power supply in detail , and presents the basis and the method as to the choice of parameters of the snubber circuit 另外本文具體分析了該逆變電源中緩沖電路的工作過程和工作原理,說明了計算選取緩沖電路參數的依據和方法。

Firstly , the summarize of the development and actuality of flyback converter is given , and different snubber circuits applied in the flyback converter are analyzed and compared 。 then the novel interleaved flyback topology is proposed 首先,對反激變換器的發展與現狀做了全面的概述,比較了反激變換器各種緩沖電路的優缺點。

Therefore , the result can be applied to other power electronic devices such as transducer , svg , etc . lastly , apf ' s main circuit , snubber circuit and driver circuit were fixed , debugged , and improved in some aspects 最后,本文對有源電力濾波器的主電路、吸收緩沖電路、驅動電路進行了安裝、調試,并做了一些改進。