基于转子磁场定向控制的永磁同步电机制动过程分析

Analysis of Braking Process of Permanent Magnet Synchronous Motor Based on Rotor Field-Oriented Control

阐述了伺服系统制动过程中电机所处的运行状态,即减流阶段、反接建流阶段、回馈发电制动阶段、能耗制动阶段(或者速度调整阶段)。仔细研究了系统制动过程中各阶段电机电流、电压、速度的变化规律,分析了影响制动过程的各种因素。提出了提高电机制动响应性能、抑制速度超调的措施,以及在系统设计、调整和构成中需要注意的方面。文章还分析了电机制动时能量的回馈和直流侧母线电压的变化,以及直流电压变化对系统的影响。仿真和实验证实了文中所做的分析。

Detailed description of the various stage in moter braking process, including current decline phase, current set-up phase in reversal connection, regenerative braking phase and power consumption braking phase or speed regulating phase, is presented, in order to study dynamic response performance of permanent magnet synchronous servo system. The factors that took effect on motor braking process, as well as its speed, current and voltage response are analyzed. A new approach that improved the motors braking performance and restrained speed overshot, and the focus that should be taken into account in design, adjust, and constitution of system are introduced. The change of DC voltage in braking process and its effect on system and feedback energy are analyzed. Both numerical simulation and experiment had approved the analysis.