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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/72212

    Title: 無感測器馬達初始位置估測及啟動方法實現;Implementation of Starting Method of Motors Without Position Sensor
    Authors: 王儷融;Wang,Lirong
    Contributors: 電機工程學系
    Keywords: 轉子位置;啟動策略;無感測器;無刷馬達;反電動勢;rotor position;start-up strategy;sensorless;brushless motor;back EMF
    Date: 2016-07-28
    Issue Date: 2016-10-13 14:32:38 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本論文討論馬達在不具有位置感測器的情況下,利用馬達的等效電感值
    也比較低。一般使用位置感測器來進行轉子位置感測,如霍爾感測器、編碼器或解角器等,但其也會增加整體成本及體積。此外,位置感測器會受溫度、雜訊、結構脆弱或安裝不當等因素影響,此方法能減少系統體積、成本,並增加系統強健性。;This thesis discusses the initial rotor position estimation of motors without position
    sensors. This estimation method is based on the relation between the equivalent
    inductance and rotor position. When injecting different voltage vectors to the motor,
    the current responses of the motor winding with same rotor position will be different.
    After estimating the initial rotor position through the current response, we can select
    the corresponding start-up vector based on the estimated rotor position. The back
    electromotive force (EMF) will be produced by the rotation of the rotor. When the
    back EMF is big enough for rotor position estimation, we can obtain the voltage
    vector command from the commutation circuit.
    This method has higher success rate of start-up and lower system cost than other
    sensorless start-up methods. The rotor position is usually detected by position sensors,
    such as Hall sensor, encoder and resolver, which may increase cost and volume
    of system. Besides, position sensor will be affected by temperature, noise, weak
    structure and improper installation. This proposed method can avoid these problems
    and increase robustness of the system.
    Appears in Collections:[電機工程研究所] 博碩士論文

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