波導電橋 的英文怎麼說
中文拼音 [bōdǎodiànqiáo]
波導電橋
英文
waveguide bridge-
The conventional switching power supply usually use a diode rectifier followed by a bulk capacitor to convert ac voltage to dc voltage, resulting in the pulsating waveform of the input ac line current, low power factor ( generally 0. 65 ) and high harmonic line current
傳統的開關電源設備通常採用二極體橋來進行整流和一個較大的電解電容來進行濾波以實現輸入電壓的交直流轉換,導致輸入電流為一個很窄的脈沖波並含有較多的諧波分量,功率因數變低(通常只有0 . 65 ) 。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
本文提出了一種採用修補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;逆變系統採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,並具有市電電網的故障診斷功能。This thesis work has researched the fabrication technics of photonic crystal defect waveguide with air - bridge structure and collecting waveguide ; suggested using uv - lithography and wet etching to fabricate traditional waveguide, after that, using eb - lithography and dry etching to fabricate photonic crystal holes, so can reduce the fabrication cost by a big range ; designed the moulding board, which can fabricate the air - bridge structure and is convenient for recognizing position in eb - lithography ; the structure consisted of traditional waveguides and etching grooves are fabricated on soi successfully, then an successful eb - lithography is realized on the structure, the defect waveguide collected with the traditional waveguide quite well ; used the etching grooves to do the sacrificial layer etching experiment, which grounded etching sacrificial layer by photonic crystal holes in next step
提出採用紫外光刻工藝製作傳統波導結構之後,通過電子束曝光和干法刻蝕製作光子晶體小孔的工藝方案,大幅度減低了製作成本;設計出可形成空氣橋結構、並且適用於電子束曝光位置識別的光刻模板,在soi材料上成功製作出帶有空氣橋刻蝕預留槽以及接續光波導的結構,在該結構上成功實現了光子晶體帶隙波導的電子束曝光,帶隙波導與接續光波導位置接續良好;最後利用預留槽進行了刻蝕犧牲層的實驗,為下一步利用光子晶體小孔刻蝕犧牲層形成空氣橋結構打下了基礎。Usually series mode is used in low frequency circuit while bypass mode is used in high frequency circuit, series mode micro - switch with cantilever structure is similar to an fet, when voltage is applied on gate, and the fet will be turned on between source and drain
有靜電電壓作用在梁和底面電極時,梁發生偏轉,在源極和漏極之間實現導通,常用於自控和通信系統的信號通路空氣橋旁路開關主要用於微波段信號的通路。Based on the research on one - cycle control theory, one - cycle control is applied to three - phase four - wire apf with four - leg in this paper. analysis for the average model of the apf in switching period is performed and the control equation is derived
本文在研究單周控制理論的基礎上,將單周控制用於四橋臂三相四線制有源電力濾波器,通過分析其開關周期平均模型,推導出它的控制方程。The equation of selecting filter capacitor is derived to make the feedback energy which is produced by the inverter to be minimum. the value of the capacitor has been decreased from 20u. f to 7. 6fif and the efficiency has been improved by 1. 5 %. the maximal filter inductor value has been given on the base of the hysteresis control principle
推導出了使逆變橋的無功回饋能量最小的濾波電容取值公式,原理樣機的濾波容因此從20 f減小到7 . 6 f ,減小了62 ;系統的效率提高了1 . 5個百分點,重量也有所減小。The thesis analyses the effect of phase shift control and the utilization of the transformers primary sides saturable inductor to the transformers secondary sides voltage duty cycle, and basic on the buck converter s small signal ac model the converter s model is deserved, and infers control to output transfer function
論文通過分析移相控制方式和高頻變壓器一次側的飽和電感對高頻變壓器二次側方波電壓占空比的影響,在buck變換器小型號模型的基礎上建立了帶飽和電感的移相控制零電壓開關全橋變換器的小信號模型,推導出控制到輸出的小信號傳遞函數。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並進行了模擬分析。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。分享友人