H02P21/00	Arrangements or methods for the control of electric machines by vector control, e.g. by control of field orientation [2006.01]
	Note(s) When classifying in this group, classification should also be made in group H02P 25/00—when the method of control is characterised by the kind of motor being controlled [8,2016.01]When classifying in this group, classification should also be made in group H02P 27/00—when the method of control is characterised by the kind of supply voltage of the motor being controlled