【正文】 tion is detected using the back EMF from the terminal voltages of the motor and the switching sequence of the inverter [2]. The sensed back EMF is used in the integration and parison circuits to obtain the mutation signals. The detected mutation signals are used to apply the proper next sequence of inverter and obtain the rotational speed within a DSP. The calculated speed is controlled by a digital PI control algorithm and the controller output is applied to the chopper. The practical implementation issues concerning the mutation delay of the 2phase excitation PWM schemes at high speed are discussed and some advantages of the DC link voltage control scheme in a high speed sensorless control are mentioned. The whole control system is implemented on a BLDC motor using DSP TMS320C240 and the e?ectiveness is veri ed through the parative simulations and experiments. 2. Sensorless Control of BLDC Motor A BLDC motor considered in this paper consists of permanent mags mounted on the rotor surface and threephase concentrated stator windings displaced by 120176。這個(gè)問(wèn)題比較嚴(yán)重的地區(qū)以更高的速度 ,可以有效克服，通過(guò)控制電壓和頻率直流環(huán)節(jié)電壓獨(dú)立的控制方案。在上部和下部開(kāi)關(guān)PWM(脈寬調(diào)制 )方案 ,這可能會(huì)得到一個(gè)不規(guī)則的開(kāi)關(guān)頻率大大高于 f 年代高職條件下如圖 1(c)。如果開(kāi)關(guān)頻率被選擇作為 16千赫 ,最高價(jià)值的變換將是 。在上面的開(kāi)關(guān) PWM 調(diào)制方式、 PWM(脈寬調(diào)制 )被執(zhí)行 的時(shí)候 ,只有在上部之一兩個(gè)活躍的開(kāi)關(guān) ,在較低的開(kāi)關(guān) PWM 調(diào)制方式 ,反之亦然。自從變換信號(hào)輸入 DSP 每隔 60 度期內(nèi) ,時(shí)鐘在 DSP臺(tái) TC 數(shù)量和計(jì)數(shù)的期間是一個(gè) 60 度 ,機(jī)械轉(zhuǎn)子速度可計(jì)算轉(zhuǎn)速如下 : 在 P 是大量的增長(zhǎng)極。這激勵(lì)方案不需要死亡的時(shí)間電力設(shè)備的發(fā)動(dòng)的軟鐵轉(zhuǎn)子 ,即使它沒(méi)有持續(xù)的扭矩。轉(zhuǎn)子位置信息利用反電動(dòng)勢(shì)檢測(cè)電壓從終端電機(jī)和逆變器的開(kāi)關(guān)順序的 [2]。在該方案中 ,逆變頻率控制供應(yīng)電流有三相矩形脈沖寬度 120度及馬達(dá)速度控制電壓調(diào)節(jié)采用降壓斬波器作為降壓轉(zhuǎn)換器。一個(gè)絕對(duì)速度傳感器通常限于大約6000 轉(zhuǎn)速與旋轉(zhuǎn)需要一個(gè)特殊的外部電路。利用這項(xiàng)技術(shù) ,因?yàn)殡妷嚎刂坪妥儞Q就可以實(shí)現(xiàn)獨(dú)立 ,延遲不存在運(yùn)算可以交換甚至在一個(gè)高速地區(qū)。本附件為封面，封面上不得 出現(xiàn)頁(yè)碼。 3． 外文文獻(xiàn)翻譯附于開(kāi)題報(bào)告之后：第一部分為譯文，第二部分為 外文文獻(xiàn)原文，譯文與原文均需單獨(dú)編制頁(yè)碼（底端居中）并注明出處。傳導(dǎo)速度控制是通過(guò)調(diào)節(jié)斬波直流環(huán)節(jié)逆變器的輸入電壓實(shí)現(xiàn)。此外 ,這些傳感器 ,尤其是霍爾傳感器 ,溫度敏感 ,限制了電機(jī)運(yùn)行大約 75℃以下 [1]。這樣的電路裝置被稱為一個(gè)變量直流環(huán)節(jié)逆變器 [7]。甚至在一個(gè)高速地區(qū) ,將討論在以后的部分。定子電流勵(lì)磁方案段提供的地方只有兩三個(gè)階段都很興奮在任何緊急的時(shí)間和一階段在 120 年期間進(jìn)行 [8]。速度的信息可從衍生工具檢測(cè)信號(hào)的位置。在 PWM 調(diào)制方式進(jìn)行的階段 ,每一個(gè)開(kāi)關(guān)被執(zhí)行 PWM 技術(shù)在第一個(gè) 60 度程度的活躍時(shí)間和保留在國(guó)家的期間第二個(gè) 60 度區(qū)在間 ,去相 PWM 調(diào)制方式 ,反之亦然 [3,4]。這個(gè)結(jié)果在一個(gè)不受歡迎的變換延遲和最大的價(jià)值 —— 這次延誤 PWM 技術(shù)轉(zhuǎn)換期間來(lái)。那么 ,現(xiàn)在的 PWM周期必須終止和新型 PWM 周期的同步變換中斷信號(hào)必須開(kāi)始了。除非解決脈沖寬度相當(dāng)高 ,這可能導(dǎo)致速度脈動(dòng)在穩(wěn)態(tài)和降解精度的位置信號(hào)的檢測(cè)。 and the motor voltage for the speed control is regulated by using a stepdown chopper acting as a buck converter. However, some advantages of the DClink voltage control scheme over the conventional 2phase PWM scheme in the high speed sensorless control have not been addressed. This article presents a DSPbased high speed sensorless control for a BLDC mo tor 3 using a DC link voltage control scheme. By driving the BLDC motor at high speed, the overall drive system can have a small size and a light weight at the same power rating. To control the BLDC motor at high speed without a shaft sensor, a DSPbased controller is developed using TMS320C240. Using the DC link voltage control scheme, the inverter is operated with the squarewave of 120176。 sec. Even though this mutation delay can be neglected for a medium speed range, it has significant in uences on the phase current response and drive performance at high speed since the 60degree interval that the mutation arises in is relatively small. For example, when a 2pole motor is rotating at 50,000 rpm, 60degree interval bees 200 183