What is the principle of motor rotation?

Electric motor rotation principle is:

1, permanent magnets placed in the middle of the rotating electromagnet, electromagnet's rotating shaft, equipped with a rectifier. The coil of the electromagnet can be energized through the brushes and rectifier.

2, when the coil is energized, the yellow side of the electromagnet becomes the S pole, the green one becomes the N pole. At this time, the electromagnet and the permanent magnet attract each other, and the electromagnet begins to rotate counterclockwise.

3. The electromagnet that starts to rotate cannot be stopped quickly, so it crosses the horizontal position and becomes the yellow side facing down and the green side facing up.

4. At this time, the rectifier is in contact with the brush that was previously in the opposite direction, so the direction of the current flowing through the solenoid is also opposite. In this way, the yellow side becomes the N pole, and the green side becomes the S pole. At this point, the electromagnet and the permanent magnet are attracted to each other and will still continue to rotate.

Motor powerlessness is caused by:

1, in three-phase voltage motor insulation bearings and other transmission parts are, the power supply is out of phase or phase.

2, more than or less than the rated working voltage of the motor.

3, mechanical parts (mainly bearings) and other components are damaged.

4, rotor broken bars, or motor repair below the original electrical standards.

5, the motor in the super-permissible temperature difference in the environment under normal circumstances, the three-phase asynchronous motor torque becomes smaller, slower speed because the motor three-phase winding turns are short-circuited (seems to be normal should be decomposed joints on the windings to do the impedance to identify respectively) or embedded in the windings of the wire gauge, the number of turns is wrong.