The direct torque control theory has achieved great success in the control ofinduction motors. However, in the DTC drive system of Permanent Magnet Synchronous Machine (PMSM)proposed a few years ago, there are many ba...The direct torque control theory has achieved great success in the control ofinduction motors. However, in the DTC drive system of Permanent Magnet Synchronous Machine (PMSM)proposed a few years ago, there are many basic theoretical problems that must be clarified. Thispaper describes an investigation about the effect of the zero voltage space vectors in the DTCsystem of PMSM and points out that if using the zero voltage space vectors rationally, not only canthe DTC system be driven successfully but also the torque ripple is reduced and the performance ofthe system is improved. This paper also studies the sensorless technique in the DTC system of PMSMand configures the DTC system of PMSM with sensorless technique including zero voltage spacevectors. Numerical simulations and experimental tests have proved the theory correct. In thecondition of sensor-less, the DTC system of PMSM is wide-rangely speed adjusting, and the ratio ofspeed adjustment is 1: 100.展开更多
在五相永磁同步电机(permanent magnet synchronous motor,PMSM)中,传统无差拍直接转矩和磁链控制(deadbeat direct torque and flux control,DB-DTFC)策略存在定子磁链和转矩耦合、计算量大以及电流谐波大等问题。基于此,提出一种基于...在五相永磁同步电机(permanent magnet synchronous motor,PMSM)中,传统无差拍直接转矩和磁链控制(deadbeat direct torque and flux control,DB-DTFC)策略存在定子磁链和转矩耦合、计算量大以及电流谐波大等问题。基于此,提出一种基于定子磁链定向的新型DB-DTFC策略。首先,在基于定子磁链定向坐标系上建立电压分量与定子磁链和转矩的关系,以实现定子磁链和转矩的解耦控制,进而提高转矩的动态性能。其次,将电流谐波抑制技术和载波脉宽调制技术相结合,以抑制3次谐波电流,进而降低定子磁链和转矩的脉动。最后,对传统和新型DB-DTFC策略进行实验比较分析。结果表明,该策略能降低定子磁链和转矩脉动、电流谐波和CPU计算量。展开更多
基金Aeronautical Science Emphasis foundation of China( 98Z5 2 0 0 1) Delta Power Electronics Science &Education DevelopmentF und
文摘The direct torque control theory has achieved great success in the control ofinduction motors. However, in the DTC drive system of Permanent Magnet Synchronous Machine (PMSM)proposed a few years ago, there are many basic theoretical problems that must be clarified. Thispaper describes an investigation about the effect of the zero voltage space vectors in the DTCsystem of PMSM and points out that if using the zero voltage space vectors rationally, not only canthe DTC system be driven successfully but also the torque ripple is reduced and the performance ofthe system is improved. This paper also studies the sensorless technique in the DTC system of PMSMand configures the DTC system of PMSM with sensorless technique including zero voltage spacevectors. Numerical simulations and experimental tests have proved the theory correct. In thecondition of sensor-less, the DTC system of PMSM is wide-rangely speed adjusting, and the ratio ofspeed adjustment is 1: 100.
文摘在五相永磁同步电机(permanent magnet synchronous motor,PMSM)中,传统无差拍直接转矩和磁链控制(deadbeat direct torque and flux control,DB-DTFC)策略存在定子磁链和转矩耦合、计算量大以及电流谐波大等问题。基于此,提出一种基于定子磁链定向的新型DB-DTFC策略。首先,在基于定子磁链定向坐标系上建立电压分量与定子磁链和转矩的关系,以实现定子磁链和转矩的解耦控制,进而提高转矩的动态性能。其次,将电流谐波抑制技术和载波脉宽调制技术相结合,以抑制3次谐波电流,进而降低定子磁链和转矩的脉动。最后,对传统和新型DB-DTFC策略进行实验比较分析。结果表明,该策略能降低定子磁链和转矩脉动、电流谐波和CPU计算量。
