Sain Chiranjit, Banerjee Atanu, Biswas Pabitra Kumar
Department of Electrical Engineering, National Institute of Technology Meghalaya, Bijni Complex, Laitumukhrah, Shillong, Meghalaya, 793003, India.
Department of Electrical Engineering, National Institute of Technology Meghalaya, Bijni Complex, Laitumukhrah, Shillong, Meghalaya, 793003, India.
ISA Trans. 2020 Feb;97:384-400. doi: 10.1016/j.isatra.2019.08.008. Epub 2019 Aug 7.
In this paper modelling and comparative dynamic analysis of a field oriented controlled permanent magnet synchronous motor (PMSM) torque drive employing a hysteresis current controller and a PWM (Pulse Width Modulation) operated current controller is presented. To illustrate the proposed concept in this torque controlled drive, torque and mutual flux linkages are applied as external inputs and speed of the machine is kept fixed. Moreover the magnitude of torque angle as well as stator current reference is controlled through the proposed machine dynamics. In fact a computation based on demagnetization of direct axis current to achieve the flux weakening in this proposed drive for current compensation is also introduced. To achieve the faster computation and accuracy Euler's integration technique is used to solve the proposed complex dynamics of the permanent magnet synchronous machine. In a hysteresis current, controllers with a large hysteresis band current ripple and the torque pulsations are prominent at higher carrier frequency of the inverter. Additionally, a relationship with the magnitude of torque pulsations, PWM carrier frequency and the hysteresis window size is also achieved through various case-studies. Furthermore, the presence of current ripple and the pulsations generate some noise as well as vibration in a typical electric propulsion system. Afterwards a PWM current controller with identical operating conditions is proposed for such reduction of torque pulsation as well as ripples in the current waveform. Finally various feasible results are presented through MATLAB simulation and necessary hardware implementation to justify the comparative assessment of the proposed controllers for dynamic performance analysis in energy-efficient electric vehicles.
本文介绍了一种采用磁滞电流控制器和脉宽调制（PWM）电流控制器的磁场定向控制永磁同步电动机（PMSM）转矩驱动的建模和比较动态分析。为了在这种转矩控制驱动中说明所提出的概念，将转矩和互感磁通作为外部输入，并保持电机速度固定。此外，通过所提出的电机动力学来控制转矩角的大小以及定子电流参考值。实际上，还引入了一种基于直轴电流去磁的计算方法，以在该提出的驱动中实现弱磁以进行电流补偿。为了实现更快的计算和更高的精度，采用欧拉积分技术来求解所提出的永磁同步电机的复杂动力学。在磁滞电流控制器中，当逆变器的载波频率较高时，具有较大磁滞带的电流纹波和转矩脉动会很突出。此外，通过各种案例研究还得出了转矩脉动大小、PWM载波频率和磁滞窗口大小之间的关系。此外，电流纹波和脉动的存在会在典型的电力推进系统中产生一些噪声和振动。之后，针对这种转矩脉动以及电流波形中的纹波的降低，提出了一种具有相同运行条件的PWM电流控制器。最后，通过MATLAB仿真给出了各种可行结果，并进行了必要的硬件实现，以证明所提出的控制器在节能电动汽车动态性能分析方面的比较评估是合理的。
