Analytical and Offline Approach to Select Optimal Hysteresis Bands of DTC for PMSM
Analytical and Offline Approach to Select Optimal Hysteresis Bands of DTC for PMSM
复制标题
为 PMSM 选择最佳 DTC 磁滞带的分析和离线方法
DOI：
10.1109/tie.2012.2189530
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发表时间：
2013
影响因子：
7.7
通讯作者：
J. Böcker
中科院分区：
文献类型：
--
作者：
S. Mathapati;J. Böcker
直接转矩控制下逆变器的开关频率主要由磁链和转矩控制器输出开关次数决定。已知的是，对于固定的磁滞带，开关频率随着操作点的改变而改变。然而，可以通过适应磁滞带来保持开关频率恒定。开关频率是转矩和磁通带的函数。可以使用磁通和转矩带的不同组合来实现期望的开关频率。然而，对于最优控制，必须在许多可用的组合中选择一个。在这方面的贡献，它建议选择的磁滞带的基础上的标准的最小谐波失真的电机电流所需的开关频率。提出了一种计算永磁同步电动机最佳频带的分析方法。分析结果与模拟研究进行了交叉检查，并通过详细的实验进行了验证。为了不降低控制性能的计算延迟，一个现场可编程门阵列为基础的控制平台被用于实现。
The switching frequency of an inverter under direct torque control is mainly decided by the flux- and torque-controller output switching counts. It is known that, with fixed hysteresis bands, the switching frequency varies as the operating point changes. It is possible, however, to keep the switching frequency constant by the adaptation of hysteresis bands. The switching frequency is a function of both torque and flux bands. Different combinations of flux and torque bands can be used to achieve a desired switching frequency. However, for optimal control, one among the many available combinations has to be chosen. In this contribution, it is proposed to select the hysteresis bands based on the criterion of the minimum harmonic distortion in the motor currents for the required switching frequency. An analytical procedure is presented to calculate these optimal bands for the permanent-magnet synchronous motor. The analytical results were cross checked with simulation studies and validated by detailed experimentation. In order not to degrade the control performance by computational delay, a field-programmable-gate-array-based control platform is being used for implementation.