楊建飛 胡育文 劉建 邱鑫 郭勇 竇一平
摘 要:兩相導(dǎo)通無刷直流電機(jī)直接轉(zhuǎn)矩控制(BLDCM DTC)系統(tǒng)中電壓空間矢量的正確定義和選擇直接影響電機(jī)的控制性能。提出了適用于兩相導(dǎo)通無刷直流電機(jī)中的電壓空間矢量(包括正矢量、反矢量、零矢量)定義方法,并指出由于電感電流的連續(xù)性以及續(xù)流二極管的存在,開關(guān)管全關(guān)條件下作用在電機(jī)上的電壓空間矢量并非零矢量,而是前一時(shí)刻所選擇的正矢量對應(yīng)的反矢量。在一套無刷直流電機(jī)DTC實(shí)驗(yàn)平臺(tái)上進(jìn)行了對比實(shí)驗(yàn)分析,得到了正矢量、反矢量、零矢量對電磁轉(zhuǎn)矩變化的影響規(guī)律,實(shí)驗(yàn)結(jié)果驗(yàn)證了理論分析的正確性,并由此提出了一種兩相導(dǎo)通BLDCM DTC系統(tǒng)的實(shí)用設(shè)計(jì)方法。
關(guān)鍵詞:無刷直流電機(jī);直接轉(zhuǎn)矩控制;電壓空間矢量;電磁轉(zhuǎn)矩
DOI:10.15938/j.emc.(編輯填寫)
中圖分類號:TM 761 文獻(xiàn)標(biāo)志碼:A 文章編號:1007 -449X(2018)00-0000-00(編輯填寫)
Abstract: The correct definition and selection of voltage spacial vectors affect the performance in two-phase conduction brushless DC motor (BLDCM) direct torque control (DTC) system directly. The definition method of voltage spacial vectors (including positive vector, negative vector and zero vector) suitable for two-phase conduction brushless DC motor is proposed. For the continuity of the inductor current and freewheeling diode ,all-off voltage spacial vector is not a zero voltage spacial vector but the negative voltage spacial vector. Experimental results verify the correctness of the theoretical analysis, and a two-phase conduction BLDCM DTC system design method is presented.
Keywords: brushless DC motor; direct torque control; voltage spacial vector;torque