轉速估算方法及模組、功率估算單元及方法

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

099146569

專利證號

I 465938

專利獲證名稱

轉速估算方法及模組、功率估算單元及方法

專利所屬機關 (申請機關)

義守大學

獲證日期

2014/12/21

技術說明

本論文在提出一種對感應機運轉狀況測量的新方法，以聲音做為測量信號。不僅能對其他無法測量的馬達依然能正常偵測，而且能夠完全結合監測系統對馬達進行故障監視。使監測的信號取樣更簡單、方便，同時也擴大監測的功能。這種以聲音信號對轉速的偵測，在做法上第一以FFT對聲音信號做頻譜分析；第二在頻譜中取出第一個頻帶做分析，計算該頻帶波峰頻率；第三建立波峰頻率-轉速表；第四以Lagrange多項式估算受測馬達的轉速。經以上步驟，該方法有相當高的準確度。且可透過同樣的程序對輸入功率做偵測。不僅如此，更可結合聲音信號故障診斷的監測，使得轉速、輸入功率的監測、故障診斷都可藉由聲音信號取樣達到整合。 This technology offers a new method to measure the operational condition of the induction motor. The acoustic signal is measured for analysis. It can not only still be detected normally when other signals can’t, but it also has the function of motor fault monitoring when it combines with a monitoring system completely. It makes signal sampling more convenient and easier, and also expands the functions and items of monitoring. The way of this method includes the following steps: firstly, the acoustic signal must be transformed into a spectrum by fast Fourier transform; secondly, the first band of the spectrum must be analyzed, and the peak frequency of this band calculated; thirdly, peak frequency-speed relation must be established; fourthly, the unknown speed with Lagrange polynomial must be calculated. From these steps, the method has a high degree of accuracy, and could detect induction motor speed and power.

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