其中，磁通能否准确观测是解耦的关键，但转子磁通是不可能准确观测的。
Unfortunately, the rotor flux which is important in the method can not be observed precisely until now.
通过用二个延迟回路的转子磁通推算器代替积分器，实验结果表明具有良好的响应特性。
This paper investigates the rotor flux estimator which replace integrators with two lag circuits. The experimental results indicate good speed responses.
为了保持转子磁通恒定，采用了混合式磁通模型，它可以保证全速范围内磁通观测的准确性。
The system USES hybrid flux model to make the rotor flux constant during full speed range.
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