外文翻譯----基于tms320f2812dsp的有死區(qū)時(shí)間補(bǔ)償?shù)膕vpwm調(diào)速永磁同步電動(dòng)機(jī)(完整版)
【正文】 of advantages such as high power density, high efficiency, high torque to inertia ratio, high reliability, et al[1],therefore, the PMSM driving system have been widely used in many application fields, especially in hybrid electric vehicles (HEV) in recentyears[2][6]. In the PMSM driving system, the threephase voltage source inverter is usually adopted and the IGBT and MOSFET are also used because of their fast switchingfrequency. For the threephase voltage source inverter, in order to avoid the short circuit of the dc link occurring when the two switch devices of the same phase are turned on simultaneously, the deadtime is usually inserted in the gate driving switch signals. During the duration of the deadtime, both of the two switch device of the same phase are turned off. The existing of the deadtime will lead to a series of deadtime effect problems such as voltage losses, current waveform distortion and torque pulsation, especially under the condition of small current or low speed. SVPWM (Space Vector Pulse Width Modulation) is a popular modulation method for threephase voltage source inverter in motor driving system. In order to improve the current waveform of motors and decrease the torque pulsation of motors, several deadtime pensation methods of SVPWM have been researched and used in the motor driving system[7][11]. Most of the pensation methods are based on the theory of average voltage deviation. In this paper, a novel deadtime pensation method of SVPWM, which is also based on the theory of average voltage deviation, is proposed. This method divides the iα iβ plane into six sectors and pensates the deadtime of SVPWM according to the stator current vector angle φ determined by the α and β axis ponents of the stator current vector in the α β reference frame. In addition, this method can be implemented entirely through software without any extra hardware design. Finally experiments are made on the PMSM driving platform based on DSP TMS320F2812 to test and verify the proposed pensation method. II. DEADTIME COMPENSATION METHOD shows the topology diagram of the PMSM driving system whose invert unit adopts the threephase voltage source inverter. In , Q1, Q2, Q3, Q4, Q5 and Q6 are six IGBTs of the threephase voltage source inverter, and D1, D2, D3, D4, D5 and D6 are their reverse parallel diodes respectively. In addition, the driving switch signals g1, g2, g3, g4, g5 and g6 are provided by the control unit of the driving system. Define the phase currents ia, ib and ic are positive when they flow from the inverter to PMSM, and negative when they flow from PMSM to the inverter. There are eight switch bination states for the six IGBTs in the threephase voltage source inverter, and during the duration of deadtime, there are correspondingly six current bination states for threephase currents ia, ib and ic according to their polarity: (1) ia0, ib0 and ic0。這種方法劃分 iα –iβ平面為六個(gè)扇形區(qū)域，進(jìn)入和補(bǔ)償?shù)乃绤^(qū)時(shí)間的 SVPWM矢量根據(jù)定子柯部門數(shù)目這種方法劃分 iα iβ 平面為 6個(gè)扇形區(qū)域，補(bǔ)償?shù)?SVPWM死區(qū)時(shí)間，根據(jù)部門的 α數(shù)和組件的定子 β軸由定子電流矢量的決定。為了提高電動(dòng)機(jī)的電流波形，降低電機(jī)轉(zhuǎn)矩脈動(dòng)，幾個(gè)死區(qū)時(shí)間補(bǔ)償 的 SVPWM方法進(jìn)行了研究和系統(tǒng)在駕駛汽車 [7][11]. 大部分的補(bǔ)償辦法是根據(jù)偏差理論的平均電壓。另外 , 開關(guān)的驅(qū)動(dòng)信號(hào)G1， G2， G3， G4， G5和 G6是系統(tǒng)提供的驅(qū)動(dòng)控制裝置。拓?fù)鋱D的永磁同步電機(jī)驅(qū)動(dòng)系統(tǒng) 零交叉點(diǎn)或每個(gè)階段極性電流是非常重要和難以檢測(cè)的。方程（ 1）顯示當(dāng)前向量 φ的計(jì)算方法，和方程（ 2）顯示了扇形和電流矢量 φ之間的數(shù)量關(guān)系。 三．實(shí)驗(yàn) 為了測(cè)試和驗(yàn)證所提出的停滯時(shí)間補(bǔ)償?shù)?SVPWM方法，實(shí)驗(yàn)建立了。 參數(shù) 單位 數(shù)值 相數(shù) 3 極對(duì)數(shù) 5 額定功率 KW 52 額定轉(zhuǎn)速 Rpm 2500 額定轉(zhuǎn)矩 Nm 200 永久磁 Wb 感應(yīng)系數(shù) (d/q) mH 定子繞組的電阻 Ω 表二 永磁同步電動(dòng)機(jī)主要技術(shù)參數(shù)和實(shí)驗(yàn) (a) 無(wú)補(bǔ)償 (b) 脈沖寬度補(bǔ)償值 = 脈沖寬度補(bǔ)償值 = 脈沖寬度補(bǔ)償值 = 脈沖寬度補(bǔ)償值 = 圖 3。 最后的實(shí)驗(yàn)是建立完善了基于 DSP TMS320F2812的驅(qū)動(dòng)永磁同步電動(dòng)機(jī)作平臺(tái)， 其結(jié)果表明，該方法可以改善目前的失真，降低扭矩，尤其是當(dāng)脈沖寬度補(bǔ)償值等于約 。 尤其是當(dāng)脈沖
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