x

dead time

uploads/dead time.jpg

dead time 停滯期。

停滯期。 “dead“ 中文翻譯：   adj. 1.死的；無生命的，無生物的。 2.無感覺的。 ...“time“ 中文翻譯：   n. 1.時，時間，時日，歲月。 2.時候，時刻；期間； ...“time dead“ 中文翻譯：   空檔時間“insensitive time; dead time“ 中文翻譯：   無感時間“astern transmission dead-time“ 中文翻譯：   倒車傳令時滯“computer dead time“ 中文翻譯：   計算機停機時間“counter dead time“ 中文翻譯：   計數管死時間; 計數器死時間“dead reckoning time“ 中文翻譯：   已推算時間“dead time allowance“ 中文翻譯：   發射延遲時間修正量“dead time analysis“ 中文翻譯：   死亡時間分析“dead time correction“ 中文翻譯：   死時間校正“dead time error“ 中文翻譯：   死時間誤差“dead time for pressure regulator“ 中文翻譯：   壓力調節器不動時間“dead time lose“ 中文翻譯：   死時間漏計“dead time loss“ 中文翻譯：   空閑時間損失; 空載時間損耗; 空載損耗; 死時間漏記“dead time period“ 中文翻譯：   靜寂時間“dead time range prediction“ 中文翻譯：   發射遲延進間距離提前量“dead time sampling“ 中文翻譯：   死亡時間采樣“dead time test“ 中文翻譯：   發射延遲時間檢查“dead time transport“ 中文翻譯：   死亡時間傳送“dead-time delay“ 中文翻譯：   空載時延“dead-time for pressure regulator“ 中文翻譯：   壓力調節器不動時間“dead-time loss“ 中文翻譯：   空時損耗; 時限丟失; 無效時間損失“effective dead time“ 中文翻譯：   有效靜止時間; 有效空載時間“equivalent dead time“ 中文翻譯：   等死時間

dead wall

This paper put forward a method of using amending sine value in the spwm sine table . this method can correct the distortion of the output voltage waveform , which resulted from the dead time used to the voltage type whole bridge main circuit . the inverter system adopts digital fuzzy controller with feed forward correction and which proportion coefficient and integral coefficient is changeable , so dynamic response is improved 本文提出了一種采用修補spwm正弦表值的方法，用以改善電壓型全橋逆變主電路因上下橋的功率器件切換時先關斷后導通的死區時間而引起的輸出電壓波形畸變；逆變系統采用帶前饋校正的變比例變積分系數的模糊控制器，提高了系統的動態響應指標；系統設計了完善的保護措施，并具有市電電網的故障診斷功能。

In the realization of the inverter control circuit , the signal from the pll is input to ir2110 via adjusting phase and forming dead time . sg3525 is selected as the core device of the chopper . meanwhile . two pulse that will input to the chopper can be obtained by simple design . besides . the circuit of which core chip is dsp is described 在逆變控制電路的具體實現中，用鎖相環作為頻率跟蹤的核心器件，經相位調整、死區形成等環節得到兩路觸發信號，輸入到ir2110中即可作為逆變器的驅動信號。

Slave cpu receives the spwm data and output the spwm wave by query the spwm table . the dead time is generated by hardware to prevent the h bridge arm from short directly . the power out module is protected for over current , over voltage and over heat 逆變器采用雙cpu結構，使用spi進行連接，主cpu完成輸入、輸出和spwm波形數據的計算，從cpu接收到spwm數據后使用查表方法輸出spwm波形，使用硬件電路生成死區時間防止橋臂直通，對輸出功率模塊進行了過流、短路、過壓、過熱保護。

The aim of the fifth part is to research how to reduce the torque ripple when the system is fed by two kinds of inverters , one is the ideal inverter , another is the inverter considering the dead time . the inverter is arranged to run in different modulated strategies as spwm , svpwm , thipwm , mtpwm , so as to seek the optimal pwm modulated strategy for reducing the torque ripple 第五部分論文對系統在理想逆變器供電、計及死區時間的逆變器供電系統運行于spwm 、 svpwm 、 thipwm 、 mt衛wm不同調制策略下的轉矩脈動進行研究，尋求逆變器一異步電動機系統運行時減少轉矩脈動的最佳pwm調制策略。

( 2 ) each state of the total switching period has been studied in detail , in which the voltage of block capacitor and current of leakage inductance of main transformer and keeping time of each state have been discussed , then the condition of zero voltage switching is attained , which gives theory guidance for setting reasonable dead time , finally , the possibility of zero voltage switching is proved by simulation of saber software ( 2 )對不對稱半橋在一個完整的開關周期內各個狀態分析，描述了隔直電容電壓和變壓器漏感電流的變化規律，各個狀態的持，然后得出實現zvs的條件，從而為設置合理的死區時間提供了理論指導，最后用saber軟件進行了仿真，驗證了零電壓開關實現的可能性。

The third part of the work concerns the main influencing factors of the system low frequency oscillation , the small signal mathematical model of the inverter induction motor is established in the stator reference coordinate , effects of the motor parameter on the system low frequency oscillation are researched . then , by the analysis of the inverter nonlinear working characteristic , the internal relationship between the inverter dead time and the low frequency oscillation is studied and clarified , and the effects on the system low frequency oscillation are taken into account , which are produced by the dead time and change of carrier wave frequency of the inverter 首先建立了固定于定子坐標系中pwm逆變器-異步電動機小信號模型的基礎，研究電機參數對系統低頻振蕩的影響；其次，通過逆變器非線性工作特性的分析，研究并揭示了逆變器死區時間與系統低頻振蕩的內在關系，考慮逆變器死區時間、載波頻率的變化對系統低頻振蕩的影響；最后總結出提高和改善系統穩定運行的電機設計和逆變器v / f _ c曲線設置準則。

One is based on vco , and the other is based on frequency divider . the advantages and disadvantages of them are discussed in the thesis . furthermore , a method of realizing dead time changeable circuit is given , which makes the designed driving circuit have more latitude when it is used 此外,論文還設計了兩種驅動信號產生電路,一種基于vco ,另一種基于振蕩器和分頻器,并對比了兩者的優缺點;給出了一種死區時間可變的電路實現方案,使所設計的驅動電路使用時具有更大的靈活性。

The design theory of neural networks and the estimations of linear systems and nonlinear systems with dead time using neural network are discussed . neuro - pid internal model control , adaptive pip controller based on neural network and adaptive smith predictor using neural network are proposed for time - delay systems . the simulation experiments and the real - time temperature control of electrical furnace are made 文中著重研究了神經元網絡設計理論、基于神經網絡的線性和非線性時滯對象辨識及時滯系統控制方法，以此為基礎提出了時滯系統神經元自適應pid內模控制、時滯系統神經網絡自適應pip控制以及神經網絡自適應smith控制方法，并進行了控制系統的實例設計與仿真實驗。

Firstly . operation principle of induction heating is introduced and the actuality of the power supply for induction heating is summarized . then , the scheme of structure of the power supply is established : uncontrolled rectifier and buck chopper constitute dc circuit . in this part , operation principle of a kind of soft switching buck chopper is presented mainly and the conclusion that the power semiconductor devices operate in soft switching is also illustrated by analysing the operation principle of all stages ; series resonant inverter is selected as inverter circuit via comparing the advantage and shortcoming of parallel resonant and series resonant . moreover . the work principle of series resonant inverter is analysed and the calculating method of the best dead time is put forward as well 文中首先介紹了感應加熱電源的工作原理并綜述了國內外的研究現狀。接下來分析并制定了電源主電路的構成方案：在對比幾種功率調節方式的基礎上選擇了不控整流加斬波調壓作為直流部分。在這部分里，重點研究了一種軟開關buck變換器，通過分析各階段的工作原理說明了開關器件如何工作在軟開關狀態；對于逆變器部分，在比較了串、并聯逆變器優缺點的基礎上選擇了串聯諧振逆變器，并詳細分析了串聯逆變器的工作原理，提出了最佳死區的計算方法。

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于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。

The a / d and cap circuits on dsp sample the voltage and current signals coming from the signal sampling circuit and the speed signal of the motor respectively . the “ dead time “ register of the dsp prevent directive - through of the igbts on the up and the down bridge arms 利用dsp上的死區寄存器設置ipm驅動信號的死區時間防止上下橋臂igbt的直通；利用板上集成的a / d轉換器采集經過板級外圍電路處理的電路信號；利用板上的捕獲單元cap采集通過轉速計的輸出從而得到電機的轉速。

The nonlinear mathematical model for the inverter induction motor system is set up taking the effect of the dead time of the inverter into consideration . based on the phase - space reconstructed theory of the chaotic kinetics , the nonlinear time lag method is used to determine the way to chaos , the attractors are reconstructed from steady state to chaotic state , and the essential characteristics of chaos are clarified 推導并建立了計及死區時間的逆變器-異步電動機系統數學模型，根據混沌動力學相空間重構理論，采用非線性系統時滯方法，研究系統通往混沌的途徑，重構系統穩態至混沌的吸引子，闡明系統混沌運動的基本特點。

Finally , the rules used to design the induction motor and set the inverter v / f curve are summarized to improve the stability of the system movement in the forth part of the dissertation , three measures are brought forward to eliminate the system low frequency oscillation . the first measure adopts pulse based dead time compensation to suppress the oscillation . as second measure , considering the motor and inverter as an integration , the discontinuous space vector modulated strategy named dpwm3 is proposed for the first time to suppress the oscillation 措施一是在總結常用死區補償方法的基礎上，提出脈沖為基礎的死區時間補償法( pbdtc )對死沈陽工業大學博士學位論文區進行補償，抑制系統的低頻振蕩;措施二是從逆變器與電機的機電一體化配合更加完善的角度，首次提出采用不連續空間矢量調制策略dpwm抑制系統的低頻振蕩;措施三是通過對系統中電機參數的調節，達到抑制系統低頻振蕩的目的;最后進行了實驗驗證。

In the sub block circuit design , the contents that the author had introduced include : the principle of band gap voltage reference and the design technique in low power supply ; the analysis of spike pulse noise rejection , frequency divider and dead time in oscillator and control circuit ; the selection of the width and length ratio of four switches and 2x / 1x mode change point in driver and mode selection circuits 在子電路設計中,作者比較深入分析的內容有:基準電路的原理及低電源電壓下基準電路的設計;振蕩器和控制電路中尖峰脈沖噪聲抑制、兩分頻電路及死區時間設定;驅動及模式選擇電路中開關管的寬長比的選擇及模式轉換點的設計。

Using dsp of ti inc . - - - - - - - tms320f240 this thesis develops a general ac variable - speed system , and then carries out the research on various new control strategies for induction motor based on it . this paper explains sine pulse width modulation ( spwm ) , space - vector pulse width modulation ( svpwm ) , and new pulse width modulation method - hybrid space vector pulse width modulation ( hsvpwm ) aiming at a inherent problem of dead time in the common pulse width modulation 本文闡述了正弦脈寬調制( spwm )控制技術；電壓空間矢量( svpwm )控制技術；以及針對常用脈寬調制方法中存在的一個固有問題? ?逆變器開關器件死區時間的影響，提出了一種新的脈寬調制方法：混合空間矢量脈寬調制控制技術。

Specific issues examined are : compensation for the variation of the stator resistance , the offset error of the dc bus voltage , the voltage error generated by the forward voltage drop the dead time of the switches , improvement of the steady state performance , and the speed sensorless control for the pmsm dtc drive system are of major concern in this thesis 定子電阻變化，直流母線電壓漂移，開關器件反向相電壓降、逆變器死區時間引起的電壓誤差的補償，提高系統穩態運行性能以及永磁同步電機直接轉矩控制的無速度傳感器運行方案等問題都是本文研究的重點。轉矩的快速響應是直接轉矩控制算法的一個卓越的性能。

To the identification of time - delay systems , the traditional identification methods are introduced . two kinds of identification methods are put forward , including linear systems and nonlinear systems with dead time . the comparison between the traditional identification methods and the ways based on neural network is made 針對時滯系統的辨識問題，介紹了傳統的時滯辨識方法，提出了兩種基于神經網絡的辨識方法，包括時滯線性系統的辨識和時滯非線性系統的辨識，并對神經網絡辨識與傳統辨識方法進行了比較； 5

During the circuit design , the author analyzed the basic principle of the direct current motor , pwm control , h - bridge power driver , and two control techniques of h - bridge power drive circuit , designed its general structure , so the feasibility of the design is confirmed . then , reference , oscillator , power dmos gate drive circuit ( charge pump , bootstrap ) , and dead time generation circuit are designed and analyzed in the sub - circuits . a current - controlled oscillator is presented in this thesis 在電路設計中,作者介紹了直流電機的工作原理和數學模型、脈寬調制( pwm )控制原理、 h橋電路基本原理和h橋功率驅動電路的兩種控制模式,設計了驅動電路的總體結構,給出了電路的功能模塊,確定了設計的可行性,然后在子電路模塊中,重點分析設計了基準源電路、振蕩器電路、高端功率管柵驅動電路(電荷泵及自舉電路) 、低端功率管柵驅動電路和死區時間產生電路。

Aiming at the non - linear links such as time lag , inertia , dead time and saturation within the turbine regulating system , a fuzzy - immune - pid control system was designed based on a mutative scale chaos optimization method , the principium of immune feedback system and the theory of fuzzy control 摘要針對汽輪機調速系統中存在的時滯、慣性、死區和飽和等非線性環節，采用模糊控制理論，結合免疫反饋機理，設計了基于變尺度混沌優化策略的模糊免疫pid控制系統。