thd total harmonic distortion 中文意思是什麼
thd total harmonic distortion
解釋
thd總諧波畸變率- thd : THD ＝thread. ThD ＝thorium D 釷D 〈鉛的同位素 Pb208〉。
- total : adj 總計的（金額等）；全部的；完全的（失明等），絕對的（禁酒等）。 a total history 通史，全史。 a...
- harmonic : n 1 【音樂】泛音；和聲。2 〈 pl 〉【數學】諧函數，調和函數。3 【物理學】諧波，諧音。adj 1 和睦的...
- distortion : n. 1. 歪扭，扭曲。2. 【電學】（信號、波形等的）失真；【物理學】（透鏡成像產生的）畸變；【醫學】扭轉，變形。3. 竄改，歪曲，曲解。adj. -al
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Thd n total harmonic distortion plus noise
總諧波失真加噪音 -
Thd total harmonic distortion
總諧波失真 -
Computation method based on fast fourier transformation ( fft ) is studied deeply, whose measurement accuracy is 0. 2s. the computing indexes involve voltage, current, power, frequency, phase, electric power, the harmonic ratio and the total harmonic distortion ( thd ) of phase voltage and phase current
深入研究了測量精度為0 . 2s級的基於快速傅立葉變換（ fft ）的電壓、電流、功率、頻率、相位、電能等電力參數和各相電壓電流各次諧波含量、諧波含有率、諧波總畸變率的計算方法。 -
Although dm can also solve the modulation time error, but the output waveforms can ’ t reach the industrial standard ( total harmonic distortion thd ). considering this, a new control strategy called current optimal control ( coc ) is presented in paper. coc is that system samples the output value real time, comparing with expected value, considering all switching actions available then draw a concluding to decide which way would be fastest and best way to render system smooth
針對這一缺點，本文提出了一種更好的控制策略，電流最優delta調制，它是在電流滯環控制的基礎上，根據電路的輸出信號來分析，考慮所有可能的逆變器動作來決定選用哪一種開關轉換方式能最快最平穩地達到預期值，採用的是一種電流預測控制手段，從而使輸出波形的紋波最小。 -
It is an effective method to overcome the periodic disturbance. in ac power system, nonlinear loads are major sources of total harmonic distortion ( thd ). this built the motivation for this dissertation
為了解決逆變電源系統中非線性負載引起的波形畸變問題，本文對基於重復控制理論的逆變電源控制技術進行了深入的研究。 -
Active pfc techniques have been researched systematically and used widely in the recent twenty years because of high power factor ( pf ) and low total harmonic distortion ( thd )
有源pfc技術具有功率因數高和總諧波含量小等優點，在過去的二十年裡，得到了長足的發展和廣泛應用。
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