pulsation effect 中文意思是什麼

pulsation effect 解釋
脈動效應
  • pulsation : n. 1. 脈搏,悸動;跳動,顫動;【電學】脈動。2. 【羅馬法】(不痛程度的)毆打。
  • effect : n 1 結果。2 效能,效果,效力,效應,作用,功效;影響。3 感觸,印象;外觀,現象。4 旨趣,意義。5 ...
  1. The study has completed the design of two - phase inverter and made up of the two - phase inverter - motor system for experimental use it is a variable frequency adjustable speed system with a open - loop control of rotational speed, which consists of voltage - controlled oscillator circulating assign device inverter circuit and two - phase induction motor a accurate mathematical model is set based on the whole system, and simulator program of dynamic and steady condition is established, which is used to calculate the dynamic and steady performance by kron and symmetrical coordinate converter by simulator calculation and experimental research with specific parameter of the system, a comparison is made between predicted and experimental characteristics, experimental measurements are shown to compare closely with corresponding theoretical result it is compared with some variable frequency adjus table speed system comprising inverter and single - phase induction motor from the system efficiency torque pulsation and the effect of two - phase inverter capacitance based on the conclusion, harmonic cancellation pulse width modulation control of a two - phase inverter - fed induction - motor drive system is researched, which cancelled the low harmonic and improve the system performance

    通過對電機的kron變換和對稱分量變換,建立了系統較精確的數學模型,編制了系統動態及穩態運行的模擬計算程序分別計算系統的動態和穩態性能。通過對系統的具體參數進行了模擬運算和實驗研究,實驗和模擬結果進行比較,說明實驗和理論較為一致,並從系統效率、轉矩脈動及兩相逆變器電容的影響等方面與各種逆變器和單相異步電動機組成的變頻調速系統加以比較。在此基礎上,對兩相逆變器供電-異步電動機系統使用諧波抑制pwm控制進行了研究,由於減少了低次諧波,改善了系統性能。
  2. In t his p aper r otating s tall a nd t he inlet v ortex in c entrifugal fans with inlet v ane control has been studied in laboratory. the harmonic wavelet is firstly used for time - frequency analysis and feature extraction of pulsation amplitude and frequency and development of rotating stall and inlet vortex. the development rule of rotating stall and inlet vortex and the effect to fans performance from the two has been found

    文中對採用入口導流器調節的離心通風機的旋轉失速和進口渦流問題進行了實驗研究,並藉助諧波小波對旋轉失速和進口渦流的頻率、幅值特性及動態過程進行了時頻分析和特徵提取,揭示了旋轉失速和進口渦流發展的規律及二者對風機性能的影響。
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