【摘要】 随着社会的发展,舰船、卫星、电动汽车等领域对电机驱动系统可靠性的要求越来越高,与电机本体相比,驱动器更容易发生开路故障,这使驱动器开路故障容错策略研究受到越来越广泛的关注。该文基于五相电流源型PMSM驱动系统,针对驱动器开路故障,提出一种就近空间矢量容错组合策略。该策略根据空间电流矢量幅值与相位的特点,结合矢量控制原理,在开路故障条件下就近选择空间电流矢量进行目标电流矢量合成,实现电磁转矩的平稳控制并维持电机的平稳运行。该策略简单方便,解决了传统电压源型驱动系统中容错控制策略开关频率不固定的问题,提高了系统稳定性。仿真实验表明,在故障条件下,该容错策略可以有效地实现电机继续平稳运行的目标。更多还原

【Abstract】 With the development of society, the reliability requirements of motor drive systems in ships, satellites, electric vehicles and other fields are increasing. Compared with the motor body, the driver is more prone to open circuit failure, which makes the research on open-circuit fault-tolerant strategies has attracted more and more attention. Based on the five-phase current source PMSM drive system, this paper proposes a near space vector fault-tolerant combination strategy for the open circuit failure of the drive. According to the characteristics of space current vector amplitude and phase, combined with the principle of vector control, the algorithm selects the nearest space current vector for target current vector synthesis under the condition of open-circuit fault to realize the stable control of electromagnetic torque and maintain the smooth operation of the motor. The algorithm is simple and convenient, which solves the problem of the non-fixed switching frequency in the fault-tolerant control strategy for the traditional voltage source drive system and improves the system stability. Simulation experiments show that under fault conditions, this fault-tolerant strategy can effectively achieve the goal of the motor continuing to run smoothly.更多还原