基于滑模变结构模型参考自适应的电气无级变速器无传感器控制

针对用于双功率流风力发电系统的电气无级变速器，提出了一种基于滑模变结构模型参考自适应系统观测器的新型无位置传感器控制策略。该方法将滑模变结构(SM)控制与模型参考自适应系统(MRAS)结合，以SM算法替代了传统MRAS算法中的比例积分(PI)环节。文中提出的SM-MRAS控制策略以磁链模型为可调模型，取代了传统的电流模型，简化了控制算法。同时采用了基于转速分段切换方法的改进型SM策略，用于SM-MRAS无传感器控制，减小抖振现象。本文建立了双功率流风力发电系统的实验平台，实验结果验证了提出的SM-MRAS无传感器控制策略对电气无级变速器内转子的有效性，并与传统MRAS控制策略进行了比较。

Sensorless Control for Electrical Variable Transmission Based on Sliding Mode Model Reference Adaptive System

A novel sensorless control based on the sliding mode(SM) model reference adaptive system(MRAS) observer is proposed for the electrical variable transmission(EVT) which is applied for the dual power flow wind energy conversion system(WECS). The SM technique replaces the proportional-integral(PI) controller existing in the traditional MRAS technique by combining the MRAS with the SM. The proposed SM-MRAS strategy selects the flux linkage model as the adjustable model instead of the traditional current model to simplify the algorithm. Furthermore, the improved SM strategy is applied for the SM-MRAS based on the multi-sectional speed switch method which is proposed to avoid the chattering phenomena existing in the traditional SM control. The experimental platform of the dual power flow WECS is built to verify the effectiveness of the proposed improved SM-MRAS strategy. Furthermore, the proposed SM-MRAS strategy is compared with the traditional MRAS strategies in the experiments.