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首页> 外文会议>2011 19th Iranian Conference on Electrical Engineering >Direct torque and indirect flux control of brushless DC motor with non-sinusoidal back-EMF without position sensor
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Direct torque and indirect flux control of brushless DC motor with non-sinusoidal back-EMF without position sensor

机译：带有位置传感器的非正弦反电动势的无刷直流电动机的直接转矩和间接磁通控制

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摘要

In this paper, the position sensorless direct torque and indirect flux control (DTIFC) of BLDC motor with nonsinusoidal (non-ideal trapezoidal) Back-EMF has been extensively investigated using three-phase conduction scheme with six-switch inverter. In the literature, several methods have been proposed to eliminate the low-frequency torque pulsations for BLDC motor drives such as Fourier series analysis of current waveforms and either iterative or least-mean-square minimization techniques. Most methods do not consider the stator flux linkage control, therefore possible high-speed operations are not feasible. In this work, by using sliding mode observer the mechanical rotor position is removed. The proposed sensorless DTC method controls the torque directly and stator flux amplitude indirectly using d-axis current. Since stator flux is controllable, flux-weakening operation is possible. Moreover, this method also permits to regulate the varying signals. Simple voltage vector selection look-up table is designed to obtain fast torque and flux control. Furthermore, to eliminate the low-frequency torque oscillations, the new method has been used to estimate the electromagnetic torque. Simulation results confirm that the proposed three-phase conduction DTC of BLDC motor drive with six-switch inverter scheme.
机译：在本文中，采用六开关逆变器的三相传导方案，对具有非正弦（非理想梯形）反电动势的BLDC电动机的无位置传感器直接转矩和间接磁通控制（DTIFC）进行了广泛的研究。在文献中，已提出了几种消除BLDC电机驱动器低频转矩脉动的方法，例如电流波形的傅立叶级数分析以及迭代或最小均方最小化技术。大多数方法不考虑定子磁链控制，因此可能的高速运行是不可行的。在这项工作中，通过使用滑动模式观察器，可以去除机械转子的位置。提出的无传感器DTC方法使用d轴电流直接控制转矩和间接控制定子磁通幅度。由于定子磁通量是可控制的，因此可以实现弱磁通操作。此外，该方法还允许调节变化的信号。简单的电压矢量选择查找表旨在获得快速的转矩和磁通控制。此外，为了消除低频转矩振荡，已使用新方法来估计电磁转矩。仿真结果证实了所提出的六开关逆变器方案的无刷直流电动机的三相导通故障诊断代码。

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