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A Modified Sensorless Control Scheme for Interior Permanent Magnet Synchronous Motor Over Zero to Rated Speed Range Using Current Derivative Measurements

機器翻譯基于電流導數測量的零至額定速度范圍內部永磁同步電動機改進無傳感器控制方案

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【摘要】This paper proposes a modified sensorless control technique for an interior permanent magnet synchronous motor over its full-speed range based on current derivative measurements and fundamental pulsewidth modulation excitation (FPE). The proposed method employs measurement of the current derivative at only one active-voltage vector at low speeds, and at one active-voltage vector and one zero-voltage vector at medium and high speeds during each pulsewidth modulation (PWM) cycle, in contrast to two active- and two zero-voltage vectors in the conventional FPE method. The theoretical analysis is developed based on the three-phase model of the machine. The rotor position and speed are estimated at PWM frequency. In addition, the selection voltage vectors for current derivative measurement as well as the pulse stretching scheme for extending and compensating the selected voltage vectors is proposed in order to improve the accuracy of the current derivative measurement and to minimize the current distortion. The experimental results show that the proposed method results in a considerable improvement of the estimation accuracy at low speeds, a significant reduction of current distortion compared to the conventional FPE method and a full-speed range operation from no load to full load.

【作者】Minh Xuan Bui; Deqi Guan; Dan Xiao; M. Faz Rahman;

【作者單位】School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, Australia; School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, Australia; School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, Australia; School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, Australia;

【年(卷),期】2019,66,1

【頁碼】102-113

【總頁數】12

【正文語種】eng

【中圖分類】;

【關鍵詞】Current measurement; Pulse width modulation; Voltage measurement; Pulse measurements; Rotors; Sensorless control; Distortion measurement;


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