【摘要】 传统的无速度传感器双馈调速系统,采用磁链定向,在同步速附近存在较大的工作死区.由此,本文提出了一种无速度传感器采用转子电流定向的方案,从而避免了磁链积分带来的误差,可广泛应用于调速范围不大的风机泵类负载,实现在调速范围的准确定向,并基于MAT LAB/SIMULINK软件包建立了双馈电机调速系统的仿真模型,给出了主要的仿真波形,对该调速方案的合理性及可行性进行了实例论证.更多还原

【Abstract】 As for the classic speed sensorless doubly fed speed adjustment system,Usually the flux linkage is used to calculate the speed, which make the system have relatively large "blind area" at the synchronization speed.So a method based on fixing the direction of rotor current with speed sensorless was proposed and the error owing to flux integral can be avoided.The method can be widely used in the load of fan and pumping which has not large speed adjustment ranges and can complish the precise directional in the speed rangein those situations. In this paper ,a simulation model of doubly fed motor speed adjustment system based on MATLAB/SIMULINK software package is constructed,and the main simulation wave is given ,moreover, the experimental results verified the correctness and feasibility of the proposed method.更多还原