Optimal State Reference Computation With Constrained MTPA Criterion for PM Motor Drives
Optimal State Reference Computation With Constrained MTPA Criterion for PM Motor Drives
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DOI：
10.1109/tpel.2014.2354299
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发表时间：
2015-08
影响因子：
6.7
通讯作者：
M. Preindl;S. Bolognani
中科院分区：
文献类型：
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作者：
M. Preindl;S. Bolognani
本研究提出了一个程序，映射到最佳状态（电流）参考的PMSM转矩请求。将该过程与动态（电流）控制器相结合产生转矩控制器。最大转矩每安培（MTPA）的标准是用来最大限度地减少传导和开关损耗。本研究将此概念扩展到弱磁操作，以在任何机器速度下获得高效率。由此产生的约束MTPA标准形式化为一个优化问题。由于它是难以直接解决的，最大和交叉扭矩子问题被确定。得到一个算法，映射到一个最佳的状态参考的扭矩，它是足够有效的实时实施。这种方法是兼容的各种状态（电流）控制器，有/没有PWM，SPM和IPM机与凸极和反向凸极，和可变直流母线电压。所提出的程序依赖于一个足够准确的扭矩模型，可能无法提供使用额定机器参数。因此，一种方法来计算局部优化的机器参数，提出了考虑磁饱和。该概念是在软件在环平台上开发的，并在实验测试台上进行评估。
This research proposes a procedure that maps a PMSM torque request onto optimal state (current) references. Combining the procedure with a dynamic (current) controller yields a torque controller. The maximum torque per ampere (MTPA) criterion is used to minimize conduction and switching losses. This research extends the concept to field-weakening operation to obtain high efficiency at any machine speed. The resulting constrained MTPA criterion is formalized as an optimization problem. Since it is difficult to solve directly, the maximum and intersection torque subproblems are identified. An algorithm is obtained that maps a torque onto an optimal state reference, and it is sufficiently efficient for real-time implementation. This method is compatible with a variety of state (current) controllers with/without PWM, SPM and IPM machines with saliency and reverse saliency, and a variable dc-link voltage. The proposed procedure relies on a sufficiently accurate torque model that may not be provided using rated machine parameters. Thus, an approach to compute locally optimized machine parameters is proposed that takes magnetic saturation into account. The concept is developed on a software-in-the-loop platform and evaluated on an experimental test bench.