摘要
在直接转矩控制技术中,对定子磁链的精确估算是关键技术之一,最常用的方法是采用具有幅值限制的新型积分器。但是该积分器的截止频率是固定不变的,不能很好的适用于转速在大范围内变化的情况,为了提高定子磁链估算的精确性以及转子速度调节的稳定性,可采用截止频率可变的积分器。随着转子转速在不同范围内变化,截止频率也相应变化,提高了在大范围内转子速度调节的稳定性和准确性,仿真表明该方案可行。
In direct torque control technology,the precision of the stator flux estimation is one of key technologies,the most common method is to use a new integrator with limited magnitude.But the cutoff frequency of it is fixed,not well-suited to the changing of speed over a wide range.In order to improve the accuracy of stator flux estimation and the stability of rotor’s velocity,a new integrator with a variable cutoff frequency is used in this paper,it means that when the rotor’s velocity in different areas changes,the cutoff frequency corresponding changes,which improves the accuracy and stability when adjusting rotor’s speed over a large range,the simulation shows that the scheme is feasible.
出处
《仪器仪表用户》
2011年第1期42-45,共4页
Instrumentation
关键词
直接转矩控制
新型积分器
截止频率可变
direct torque control
new integrator
variable cutoff frequency
