ABSTRACT

This paper proposes a control strategy to enhance the operating efficiency of a Hybrid Energy Storage System (HESS) for an Interior Permanent Magnet Synchronous Motor (IPMSM) drive. In this method, the battery and super-capacitor (SC) are connected by an interleaved DC-DC (DD) converter where a bypass DD scheme with the inherent anti-parallel diode of power switches is used to create another shorter path for battery discharge. In this design, an adjustable DC-link voltage is accomplished to fit the characterisations in various motor operating conditions. Then, with the corresponding control design, the proposed HESS can operate in an optimal state to improve efficiency and extend the battery lifetime. To validate the effectiveness of the method, several operation scenarios including acceleration, constant-speed and deceleration of the IPMSM are examined using simulations. This is further supported through the experimental study. The test results obtained under the buck, boost and bypass converter scenarios consolidate the feasibility and practicality of the proposed approach in an attempt for potential electric vehicle applications.

摘要

本文提出了一种控制策略，以提高内部永磁同步电机 (IPMSM) 驱动器的混合储能系统 (HESS) 的运行效率。在这种方法中，电池和超级电容器 (SC) 通过交错式 DC-DC (DD) 转换器连接，其中使用具有电源开关的固有反并联二极管的旁路 DD 方案来创建另一个更短的电池放电路径. 在此设计中，实现了可调节的直流母线电压，以适应各种电机运行条件下的特性。然后，通过相应的控制设计，所提出的 HESS 可以在最佳状态下运行，以提高效率并延长电池寿命。为了验证该方法的有效性，包括加速、使用模拟检查 IPMSM 的恒速和减速。实验研究进一步支持了这一点。在降压、升压和旁路转换器场景下获得的测试结果巩固了所提出方法在潜在电动汽车应用中的可行性和实用性。