Our factory produces various types of motors. The conditions for the establishment of synchronous motors include: in order to establish the mathematical model of synchronous motors, necessary assumptions must be made for the actual three-phase synchronous motors to simplify the analysis and calculation.It is generally assumed that:
(1) The magnetic permeability of the motor magnet is constant, ignoring the effects of hysteresis and magnetic saturation, as well as the effects of eddy current and skin setting.
(2) For the vertical and horizontal axes, the motor rotor is completely symmetrical in structure.
(3) The positions of the three windings of the stator differ from each other by an electric Angle of 120 in space, and the three windings are completely identical in structure.At the same time, they all generate sinusoidal magnetomotive force in the air gap.
(4) The slots and ventilation grooves of the stator and rotor do not affect the inductance of the motor stator and rotor, that is, the stator and rotor of the motor are considered to have smooth surfaces.
