無(wú)刷直流電機(jī)的換相和控制都需要準(zhǔn)確的轉(zhuǎn)子位置信息,而安裝轉(zhuǎn)子位置傳感器是較困
難的. 鑒于定子繞組的反電勢(shì)與轉(zhuǎn)子位置的嚴(yán)格對(duì)應(yīng)關(guān)系,提出了一種根據(jù)端電壓得到反電勢(shì),從而實(shí)現(xiàn)定子繞組換流的方法. 給出了以TMS320F240 為核心設(shè)計(jì)的無(wú)位置傳感器無(wú)刷直流電機(jī)控制系統(tǒng)的軟硬件框圖.
關(guān)鍵詞: 無(wú)刷直流電機(jī);無(wú)傳感器;數(shù)字信號(hào)處理器
Abstract : The accurate rotor position is required while a brushless DC motor (BLDCM) is under com2 mutation and cont rol. However , the fixing of position sensors is believed to difficult . In terms of the correspondence relation between winding’s back2EMF and the position of a rotor , a new method of es2 timating rotor’s position is proposed in this paper , which obtains back2EMF through phase voltage. The design of cont rol system is presented as well based on TMS320F240.
Key words : brushless DC motor ; sensorless DC motor ; digital signal processor