为解决当前直线电机效率优化策略研究中存在的损耗模型准确性和计算复杂度难以取舍的问题，在综合考虑动态边端效应和漏感影响的基础上，对直线感应电机提出一种计算复杂度适中的新型最小损耗控制策略。选取次级磁链作为优化参数，在效率最佳运行点，再次平衡d-q 轴电流。首先基于改进的双三相直线感应电机数学模型推导出一种新型稳态损耗模型，在此模型基础上设计出完整的最小损耗控制策略。以1台额定功率3 kW的直线感应电机为研究对象，仿真验证此策略较传统FOC策略，在0.2 p. u.轻载、5 m/s 时减少约220 W（43%） 损耗，并且显著减小了推力波动，验证了新策略的损耗降低效果。
In order to solve the problem of difficult trade-offs between the accuracy and complexity of loss models in the current study of linear induction motor efficiency optimization strategies, a new minimum loss control strategy with moderate complexity is proposed for linear induction motors based on a comprehensive consideration of dynamic edge-end effects and leakage inductance effects. The secondary magnetic chain is selected as the optimized parameter to balance the d-q axis current again at the optimal operating point of efficiency. A new steady-state loss model is first derived based on an improved mathematical model of a dual three-phase linear induction motor, and a complete loss minimization control strategy is designed based on this model. The study platform is a linear induction motor with a rated power of 3 kW, and the simulation verifies that this strategy reduces the losses by about 220 W (43%) at 0. 2 p. u. light load and 5 m/s compared with the conventional FOC strategy, and significantly reduces the thrust fluctuation, which verifies the loss reduction effect of the new strategy.
2023,45(16): 85-88 收稿日期：2022-7-11
DOI：10.3404/j.issn.1672-7649.2023.16.017
分类号：TM346
基金项目：国家自然科学基金资助项目（52107136）
作者简介：陈亚(1998-),男,硕士研究生,研究方向为电力电子与电力传动
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