微特电机 ›› 2018, Vol. 46 ›› Issue (4): 26-32.doi: 1004-7018-46-4-26-32

• 设计分析 • 上一篇    下一篇

基于SOGI和FLL的感应电机磁链观测器设计

张红1,何小敏2   

  1. 1. 广州铁路职业技术学院,广州 510430
    2. 广东工业大学,广州 510006
  • 收稿日期:2017-10-24 出版日期:2018-04-28 发布日期:2018-04-28
  • 作者简介:张红(1967—),女,副教授,硕士,主要研究方向为电力电子技术、控制理论与控制工程。
  • 基金资助:
    国家软科学研究计划项目(2006GX2B060)

Induction Motor Flux Estimator Design Based on Second-Order Generalized Integrator and Frequency-Locked Loop

ZHANG Hong1, HE Xiao-min2   

  1. 1. Guangzhou Institute of Railway Technology,Guangzhou 510430,China
    2. Guangdong University of Technology,Guangzhou 510006,China
  • Received:2017-10-24 Online:2018-04-28 Published:2018-04-28

摘要:

准确的磁链估计是实现高性能感应电机驱动的重要环节。设计了一种基于二阶广义积分器(SOGI)和锁频环(FLL)的新型磁链观测器以获取较好的磁链预测效果。不同于纯积分器和低通滤波器SOGI用于对电机反电动势积分,它可以避免由初始条件或直流偏置引起的饱和。新型磁链估计器不需要额外的幅值和相角补偿,并在采用多个SOGI和FLL配置后显著提高了电机低速下的磁链估计性能。最后,通过实验对磁链观测器的效果进行了验证。

关键词: 感应电机, 磁链观测器, 锁频环, 二阶广义积分器

Abstract:

Flux estimation is essential for the high performance induction motor driving system. A new type of flux observer based on second-order generalized integrator (SOGI) and frequency-locked loop (FLL) was designed to obtain the accurate flux estimation. The SOGI was used to integrate the back electromotive force of the motor, unlike the pure integrator and the low-pass filter, which avoided the saturation caused by the initial conditions, as well as the DC bias. The new flux estimator did not require additional amplitude and phase angle compensation and significantly improved the performance of the flux estimation at low speed after using multiple SOGI and FLL configurations. Finally, the effect of the flux observer was verified by experiments.

Key words: induction motor (IM), flux estimation, frequency-locked loop (FLL), second-order generalized integrator (SOGI)

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