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應用改良型滑模觀測器於無轉軸偵測元件之永磁同步電動機驅動器

Applying an Improved Sliding Mode Observer to the Sensorless PMSM Drive

作者:廖培凱
畢業學校:國立臺灣科技大學
出版單位:國立臺灣科技大學
核准日期:2016-01-15
類型:Electronic Thesis or Dissertation
權限:Copyright information available at source archive--National Taiwan University of Science and Technology....

中文摘要

本研究主要在探討應用改良型順滑模態電流觀測器於無轉軸角度偵測元件永磁同步電動機驅動器之轉子角度估測。
一般而言,順滑模態觀測器是採用傳統正負號切換函數或是線性飽和切換函數。在此設計下,都必須採用低通濾波器以解決切跳的問題。本研究使用S型之切換函數來做設計,將可降低切跳之現象,增加轉子角度估測之精確度,也可免除因低通濾波器設計之需要所造成角度估測延遲。
模擬結果顯示出本研究設計之優點。更進一步,應用此理論於低成本16位元微控制器之實作,驗證了本方法之優越性與可行性。

英文摘要

The main objective of this research is to explore the estimation for the
rotor angle of a sensorless permanent magnet synchronous motor (PMSM) drive by applying an improved sliding mode observer (SMO) to the PMSM drive.
In general, a sign function or a saturation function is conventionally used in the SMO design. Under this case, an additional design of a low-pass filter is necessary to solve the chattering problem. In this research, we use an S-curve, i.e. a sigmoid switching function, to replace the conventional switching function. Based on this design, it will reduce chattering phenomena and improve the accuracy of the rotor angle of a PMSM. Moreover, it can prevent the estimation delay due to the design of a low-pass filter.
Simulation results show the advantages of the proposed design.
Furthermore, the implementation in a low-cost 16-bit micro controller unit
(MCU) proves the superiority and feasibility of the applied method.

 

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