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首页> 外文期刊>Electric Power Components and Systems >Model Predictive Based Direct Torque Control for Induction Motor Drives by Sole-Evaluation of Two Parameter Independence Duty Ratios for Each Voltage Vector
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Model Predictive Based Direct Torque Control for Induction Motor Drives by Sole-Evaluation of Two Parameter Independence Duty Ratios for Each Voltage Vector

机译：基于模型基于预测的基于电动机驱动的直接扭矩控制通过对每个电压矢量的两个参数独立占空比的唯一评价

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摘要

Due to importance of duty cycle based model predictive torque control (MPTC), it has been accepted as an effective and common alternative control strategy for industry. Since its major drawback is great dependency on duty ratio parameter, the robustness and the complexity of control system has been respectively decreased and increased. A duty-ratio set considering limited members can be replaced with continuous and dependent parameters form duty cycle relationship. Hence, this paper proposes a new and applicable discrete duty cycle control strategy to reduce both the torque and flux ripples appeared in MPTC method. In the proposed method, after preselecting around half of all admissible voltage vectors based on the torque sign or speed variation and the stator flux position, two duty ratios have just been selected for the preselected active voltage vectors. These two duty ratios are achieved based on the equivalent voltage concept with independent motor parameter. Then, the model predictive control method is employed to select the optimum active voltage vector and its relevant duty ratio among the reduced feasible voltage vectors which reduces both the flux and torque ripples, especially in low speed ranges. The simulation results have confirmed the performance of the proposed method in order to reduce the torque and flux ripples, and the experimental results have accordingly validated its performance. Since the number of voltage vectors and duty ratios is significantly decreased, the execution time of the proposed method is further reduced, and virtually worked with a constant switching frequency for all speed ranges.
机译：由于占空比的模型预测扭矩控制（MPTC）的重要性，它被认为是工业的有效和常见的替代控制策略。由于其主要缺陷是对占空比参数的良好依赖性，因此控制系统的鲁棒性和复杂性分别降低和增加。考虑有限成员的占空比集可以用连续和依赖参数形成占空比关系来替换。因此，本文提出了一种新的和适用的离散义循环控制策略，以减少MPTC方法中出现的扭矩和磁通波纹。在所提出的方法中，在基于扭矩符号或速度变化和定子通量位置预设所有可允许电压矢量的大约一半之后，刚刚选择了两个占空比的占空比的占空比。这两个占空比基于具有独立电动机参数的等效电压概念来实现。然后，采用模型预测控制方法来选择最佳的活性电压矢量及其相关的可行电压矢量之间的相关占空比，这减少了通量和扭矩涟漪，尤其是在低速范围内。仿真结果证实了该方法的性能，以减少扭矩和焊剂涟漪，并因此验证了其性能的实验结果。由于电压矢量和占空比的数量显着降低，所以提出的方法的执行时间进一步减少，并且实际上以恒定的开关频率用于所有速度范围。

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