The continuous rotating magnet field is transformed into discrete step field in the torque vector control and the electromagnet torque is controlled by means of regulating the stator current.
在矩角控制过程中将连续的旋转磁场离散为步进磁场，通过控制电机定子电流实现对电磁转矩的控制。
2
However, since the Permanent Magnet BLDCM speed regulating system is a non-linear Multivariable time-varying one, traditional PID control methodology can not be utilized with good performance.