諧波壓電晶體 的英文怎麼說

中文拼音 [xiébōyādiànjīngtǐ]
諧波壓電晶體 英文
overtone crystal
  • 諧 : Ⅰ形容詞1 （和諧） in harmony; in accord; in tune 2 （詼諧） humorous Ⅱ動詞（商量好; 辦妥） come t...
  • 波 : Ⅰ名詞1 （波浪） wave 2 [物理學] （振動傳播的過程） wave 3 （意外變化） an unexpected turn of even...
  • 壓 : 壓構詞成分。
  • 電 : Ⅰ名詞1 （有電荷存在和電荷變化的現象） electricity 2 （電報） telegram; cable Ⅱ動詞1 （觸電） give...
  • 晶 : Ⅰ形容詞（光亮） brilliant; glittering Ⅱ名詞1. （水晶） quartz; （rock） crystal 2. （晶體） any crystalline substance
  • 體 : 體構詞成分。
  • 電晶體 : bjt
  1. Monitor apparatus can measure valid value of three phase voltage and current, power factor, three phase disequilibrium, instant flecker of short time and harmonic without twenty, degree and harmonic distortion total. the paper are laid on the following. ( 1 ) master plan and function of circuit, ( 2 ) hardware design including circuit and principle of a / d conversion, phase lock, liquid crystal display and keystroke and so on, ( 3 ) design of system software including digital filtering, fft, a / d conversion and monitor interface of pc, ( 4 ) system test

    監測儀能夠完成包括三相電壓、三相電流的有效值、功率因數、三相不平衡、電壓短期閃變、以及20次內的諧波、諧波相位、諧波失真總量等的測量。論文重點介紹了以下幾部分： （ 1 ）電路的總體設計和功能； （ 2 ）硬體設計，包括a d轉換、鎖相環、液晶顯示和按鍵輸入等原理和電路。 （ 3 ）系統軟體設計，包括a d轉換、 fft 、數字濾波等程序的原理和演算法以及上位機監控界面的設計； （ 4 ）系統測試。
  2. Then the paper analyzes control system of hybrid active power filter, the way of harmonic detecting and the principle of control system, digital low pass filter and the generation of pwm, on the base of which the paper designs a new parallel hybrid active power filter which is controlled by tms320lf2407, and detailedly introduces drive circuit of pwm, sampling circuit of current, voltage adjustment and protection circuit, communication circuit, liquid crystal display circuit

    分析了混合型有源濾波器的控制系統、諧波檢測方法及控制原理、數字低通濾波器和pwm信號的產生，在此基礎上設計了一種基於tms320lf2407為控制核心的並聯混合型有源電力濾波器硬體原理圖。並對pwm驅動電路、電流采樣電路、電壓調整、按鍵輸入和保護電路、通信模塊、液晶顯示模塊進行了較詳細的分析說明。
  3. The tunable performance is obtained by rotating the grating. the disadvantages of the mechanical tunable filter are high control voltage, slow response time and big volume. the electro - optic tunable filters are obtained by the alteration of the birefringence of the electro - optic material applied voltage

    電子光學濾光片則是通過施加電壓使各種電子光學材料的雙折射率發生變化來實現透射波長的調諧，也可以利用電光晶體在電場中的旋轉來實現波長的調諧。
  4. As we know, usually the wavelength tuning of the qpm - opo is achieved by changing the crystal temperature, but the response is not fast. in this paper we demonstrate the wavelength tuning of the qpm - opo by the electro - optic effect for the fast wavelength tuning

    我們知道，基於ppln的qpm - opo的波長調制通常可以通過改變晶體的工作溫度來獲得，但是這種靠溫度的調諧速度不快，本文給出了一種利用電光效應外加電壓快速調諧波長的方法。
  5. We discuss the relationship of the properties of the wavelength tuning v. s. applied voltage > working temperature and duty - cycles when the voltage applies on the single domain or the dual domain

    討論了ppln在單疇、雙疇分別加電壓的情況下，其波長調諧特性與外加電壓、晶體溫度及占空比的關系。
  6. Quartz crystal units ; methods for the measurement of frequency and equivalent resistance of unwanted resonances of filter crystal units

    壓電石英器件.測量方法.濾波器晶體附加諧振的頻率和
  7. On the base of it, a piece of data collection special chip with a core of fft is designed with vhdl ( vhsic hardware description language ) in the way of top down system design method, which can finish harmonic analysis and measure the voltage, current, frequency and power of the electric power system

    在此基礎上，使用標準的硬體描述語言vhdl設計出一個fft變換內核，並以該內核為核心、採取自上而下的系統設計方法完成了一個電力系統數據採集專用晶元的設計，實現對電力系統的電壓、電流、頻率、有功和無功功率等參數的測量以及各次諧波分析。
  8. As a result, there are some disadvantages for its large size, heavy weight and lower efficiency. in this paper, phase - shifted zero - voltage - switching pwm converter is presented, which is help to ruduce the size and improve the efficiency of inverter. in the later stage, we adopted a pic microcomputer as the control chip, whose low price decreases the price of the inverter

    在逆變環節中，本文採用體積小、功能全、價格便宜而且簡單易學的單片機pic16c72作為控制晶元，對前級直流電壓進行spwm正弦脈寬調制，從而產生了高質量的正弦輸出電壓波形，減小了輸出電壓中的諧波含量。
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