零頻率直流 的英文怎麼說
中文拼音 [língbīnlǜzhíliú]
零頻率直流
英文
zero frequency- 零 : Ⅰ數詞1 (零數) zero2 (數的空位) zero sign (0); nought 3 (表示沒有數量;無) nil; nought 4 (...
- 頻 : Ⅰ形容詞(次數多) frequent Ⅱ副詞(屢次) frequently; repeatedly Ⅲ名詞1 [物理學] (物體每秒鐘振動...
- 率 : 率名詞(比值) rate; ratio; proportion
- 直 : Ⅰ形容詞1 (成直線的; 硬挺的) straight; stiff 2 (跟地面垂直的; 從上到下的; 從前到后的) erect; v...
- 流 : Ⅰ動1 (液體移動; 流動) flow 2 (移動不定) drift; move; wander 3 (流傳; 傳播) spread 4 (向壞...
- 頻率 : frequency; rate
- 直流 : direct current (dc); constant current; steady current; continuous current; zero frequency curre...
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For ac discrete digital signal, the zero - calculating method is applied to calculate the true zero in the periodic signal. for the measurement of ac and dc voltage spectrum, the faster fourier transform ( fft ) is used. to measure dc voltage ripple spectrum and frequency modulation of ac voltage, the digital filter is used
其中對于交變的離散數字量,採用零點撿出技術計算周波信號的真實過零點;對于交直流電壓頻譜,採用快速傅立葉變換進行頻譜分析;對于直流電壓脈動和頻率調制,採用數字濾波器進行濾波后再做分析處理。The list betterments aimed at the properties of system : through the testing of dc voltage, pulse width and inverting voltage and frequency can be regulated online to fit for different steady load ; reducing speed ripples by compensating with nonzero voltage working proportional time ; adopting the technology of harmonics suppression. as a result, the high precision and wide speed control is realized and the step out is overcome
針對系統的性能指標,做了如下改進:對直流側電壓的檢測,在線調整逆變器導通脈寬、輸出電壓和頻率,可以適應不同大小的恆負載;並用非零電壓矢量作用時間進行補償的方法,減小電機的低速脈動;加入了諧波抑制技術等。
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