When the estimated speed converges to the actual rotor speed, the rotor flux observed converges to its true value, which can be used in direct field orientation control (DFOC).
Using center of gravity method, the system make the precise orientation of laser spot come true.
系统采用质心法，实现了激光光斑中心精确定位。
3
We will continue to highlight the international-orientation of the Expo, importing a batch of global exhibition brands to make this Expo a true platform for international exchanges.