基于高精度电感法的无刷直流电机起动及反电动势同步检测稳定性研究

发布时间：2018-05-08 23:37

本文选题：无刷直流电机 + 无位置传感器控制　；参考：《电工技术学报》2017年05期

【摘要】：提出了一种基于电感法的高精度定位方案,在不增加定位电流脉冲数量的基础上将定位精度由原先的60°电角度提高至30°电角度,并消除了电机因工艺问题导致的相绕组参数不一致对检测的影响。设计了一种新颖的切换算法,可在极短时间内稳定可靠地切换到闭环。讨论了反电动势的同步检测方案,通过理论分析和仿真对比了PWM导通和PWM关断时刻检测反电动势过零信号方法的区别,并对干扰因素提出了补偿方案。样机实验验证了所提方案的稳定性和可靠性。
[Abstract]:A high precision positioning scheme based on inductance method is proposed. The positioning accuracy is improved from 60 掳electric angle to 30 掳electric angle without increasing the number of current pulses. The influence of the phase winding parameter inconsistency caused by the process problem on the detection is eliminated. A novel switching algorithm is designed, which can switch to the closed loop stably and reliably in a very short time. The synchronous detection scheme of backEMF is discussed in this paper. The difference between PWM conduction and PWM turn-off time detection method for zero-crossing signal of backEMF is compared by theoretical analysis and simulation, and the compensation scheme for interference factors is put forward. The stability and reliability of the proposed scheme are verified by the prototype experiment.
【作者单位】：中南大学信息科学与工程学院;
【分类号】：TM33

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