电源学报2025，Vol.23Issue(2)：224-231,8.DOI:10.13234/j.issn.2095-2805.2025.2.224
基于低精度编码器的异步电动机二阶滑模负载转矩观测方法
Second-order Sliding-mode Load Torque Observer for Induction Motor Based on Low-precision Encoder
谢燕朋 1冯喜军 2但汉兵 1蒋罗庚 2粟梅1
作者信息
- 1. 中南大学自动化学院,长沙 410083
- 2. 威胜电气有限公司,长沙 411100
- 折叠
摘要
Abstract
To ensure the motor drive performance while saving cost in the field of electric industrial vehicles,low-precision encoders are often adopted.Although these encoders can measure the rotor's accurate mechanical position,they introduce a long delay and large errors to the measured speed information.Therefore,the traditional load torque observers cannot obtain the accurate load torque information,and when the inaccurate information is used as feedforward of the current loop,the motor speed fluctuation cannot be effectively suppressed.To solve this problem,a second-order sliding-mode load torque observer based on a low-precision encoder is proposed,which can obtain the accurate load torque information based on the rotor position information and thus improve the anti-interference performance of the system.Finally,the correctness and effectiveness of the proposed method was verified by simulation and experimental results.关键词
异步电动机/低精度编码器/滑模观测器/负载转矩观测器Key words
Induction motor/low precision encoder/sliding mode observer/load torque observer分类
动力与电气工程引用本文复制引用
谢燕朋,冯喜军,但汉兵,蒋罗庚,粟梅..基于低精度编码器的异步电动机二阶滑模负载转矩观测方法[J].电源学报,2025,23(2):224-231,8.
