无速度传感器的永磁同步电机无差拍直接转矩控制方法
发布时间：2019-02-21 12:58
【摘要】：针对传统永磁同步电机直接转矩控制方法中存在的转矩脉动大、开关频率不恒定等问题,提出了一种永磁同步电机无差拍直接转矩控制方法。为了使系统工作于无速度传感器状态,提出了一种简单实用的基于转子磁链的转速辨识方法。基于永磁同步电机的数学模型,通过计算在一个控制周期内能同时精确补偿转矩误差和磁链误差的空间电压矢量,得出了基于磁链与转矩的无差拍控制方法。利用转子磁链旋转速度与电机转速(电角速度)完全一致的特点,提出了一种简单实用的转速辨识方法,并将此转速辨识方法与无差拍直接转矩控制方法相结合。对传统直接转矩控制方法和提出的改进型控制方法分别进行了仿真与实验对比。分析结果表明,相对于传统直接转矩控制方法,所提方法能够明显减小磁链与转矩脉动,并且保持了传统直接转矩控制中转矩动态响应快的优点。转速辨识方法能够快速、准确地提供转速信号。仿真与实验结果验证了所提方法的可行性和有效性。
[Abstract]:Aiming at the problems of large torque ripple and unsteady switching frequency in the traditional direct torque control method of permanent magnet synchronous motor, a new direct torque control method for permanent magnet synchronous motor without beat is proposed in this paper. In order to make the system work in a sensorless state, a simple and practical speed identification method based on rotor flux is proposed. Based on the mathematical model of permanent magnet synchronous motor (PMSM), a beat free control method based on flux linkage and torque is proposed by calculating the space voltage vector which can accurately compensate both torque error and torque error in a control cycle. In this paper, a simple and practical speed identification method is proposed based on the characteristic that the rotor flux rotation speed is completely consistent with the motor speed (electric angular velocity), and the speed identification method is combined with the non-beat direct torque control (DTC) method. The traditional direct torque control method and the improved control method are compared by simulation and experiment respectively. The results show that compared with the traditional direct torque control method, the proposed method can significantly reduce flux chain and torque ripple, and maintain the advantages of fast torque dynamic response in traditional direct torque control. The speed identification method can provide the speed signal quickly and accurately. Simulation and experimental results show that the proposed method is feasible and effective.
【作者单位】： 西安高压电器研究院有限责任公司;西安交通大学电气工程学院;
【基金】：国家自然科学基金(50707025)
【分类号】：TM341
[Abstract]:Aiming at the problems of large torque ripple and unsteady switching frequency in the traditional direct torque control method of permanent magnet synchronous motor, a new direct torque control method for permanent magnet synchronous motor without beat is proposed in this paper. In order to make the system work in a sensorless state, a simple and practical speed identification method based on rotor flux is proposed. Based on the mathematical model of permanent magnet synchronous motor (PMSM), a beat free control method based on flux linkage and torque is proposed by calculating the space voltage vector which can accurately compensate both torque error and torque error in a control cycle. In this paper, a simple and practical speed identification method is proposed based on the characteristic that the rotor flux rotation speed is completely consistent with the motor speed (electric angular velocity), and the speed identification method is combined with the non-beat direct torque control (DTC) method. The traditional direct torque control method and the improved control method are compared by simulation and experiment respectively. The results show that compared with the traditional direct torque control method, the proposed method can significantly reduce flux chain and torque ripple, and maintain the advantages of fast torque dynamic response in traditional direct torque control. The speed identification method can provide the speed signal quickly and accurately. Simulation and experimental results show that the proposed method is feasible and effective.
【作者单位】： 西安高压电器研究院有限责任公司;西安交通大学电气工程学院;
【基金】：国家自然科学基金(50707025)
【分类号】：TM341
【参考文献】
相关期刊论文 前6条
1 田淳,胡育文;永磁同步电机直接转矩控制系统理论及控制方案的研究[J];电工技术学报;2002年01期
2 孙丹,贺益康,智大为;基于模糊逻辑的永磁同步电动机直接转矩控制[J];电工技术学报;2003年01期
3 胡虎,李永东;基于区域电压矢量表的交流异步电动机直接转矩预测控制策略研究[J];电工技术学报;2004年02期
4 刘军,楚小刚,白华煜;基于参考磁链电压空间矢量调制策略的永磁同步电机直接转矩控制研究[J];电工技术学报;2005年06期
5 刘军,刘丁,吴浦升,白华煜;基于模糊控制调节电压矢量作用时间策略的永磁同步电机直接转矩控制仿真研究[J];中国电机工程学报;2004年10期
6 史涔n，
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