外文翻译基于TMS320F2812 DSP有死区时间补偿SVPWM调速永磁同步电动机.docxVIP

Dead-time Compensation of SVPWM Based on DSP TMS320F2812 for PMSMSong Xuelei*, Wen Xuhui, Guo Xinhua, and Zhao FengInstitute of Electrical Engineering, ChineseAcademy of Sciences, Beijing, P.R.ChinaE-mail: songxl@mail.iee.ac.cnAbstract—The dead-time effect in a three-phase voltage source inverter can result in voltage losses, current waveform distortion and torque pulsation. In order to improve the current waveform and decrease the torque pulsation, this paper proposes a dead-time compensation method of SVPWM. This method divides the iα- iβplane into six sectors and compensates the dead-time of SVPWM according to the sector number of stator current vector determined by the α- and β-axis components of the stator current vector in the two-phase static reference frame. In addition, this method can be implemented entirely through software without any extra hardware. Finally experiments based on DSP TMS320F2812 are established and made, and the experiment results indicate that the proposed method is correct and feasible.Index Terms--dead-time compensation,SVPWM,PMSM,TMS320F2812I. INTRODUCTIONBecause the permanent magnet synchronous machine (PMSM) has a lot 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 three-phase voltage source inverter is usually adopted and the IGBT and MOSFET are also used because of their fast switchingfrequency. For the three-phase 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 dead-time is usually inserted in the gate driving switch signals. During the duration of the dead-time, both of the two switch device of the same phase are turned off. The existing of the dead-time will lead