The lifting power of the yoke was not relative to the magnetic field composed in the workpiece tested, so it could not reflect the magnetizingpower of the yoke.
该磁化装置的提升力与其在工件中产生的合成磁场无对应关系，因此不能反映对工件的磁化能力。
2
This paper proposes a new method of sensorless vector control for induction motors, in which the motor speed is estimated by both instantaneous reactive power and variation of magnetizing current.