Motor magnetic pole machining parts

The number of magnetic poles of the motor is the number of magnetic poles of the specified sub-field. The stator windings are connected in different ways, which can form different poles of the stator magnetic field. The number of poles of the selected motor is determined by the speed required by the load. The number of poles of the motor directly affects the speed of the motor. The speed of the motor is 60 times the frequency and then divided by the number of pole pairs, that is, n=60f/p. Note: P is the number of pole pairs of the motor. For example, for a 2-pole motor, p=1=the number of motor poles/2, not the number of poles 2 of the direct motor. The current of the motor is only related to the voltage and power of the motor.

The windings of the motor's magnetic pole processing parts can form a loop, that is, the number of magnetic pole pairs, which appear in pairs. The poles are the meaning of magnetic poles. These windings will generate magnetic fields when passing current, and the corresponding magnetic poles will be generated. Each coil of a three-phase AC motor generates N and S magnetic poles, and the number of magnetic poles contained in each phase of each motor is the number of poles. Since the magnetic poles appear in pairs, the motor has 2, 4, 6, 8... poles.

In a 2-pole (1 pair of magnetic poles) motor, the distance of a pair of magnetic poles in space is 360°, and the current changes for half a period, and the rotating magnetic field in the space version is rotated by 1/2 turn, that is, a space angle of 180°; current changes In one cycle, the magnetic field makes a full circle, which is a 360° spatial angle. In a 4-pole (2 pairs of magnetic poles) motor, the distance between each pair of magnetic poles is only 180° in space. When the current changes for one cycle, the rotating magnetic field only moves 180° in space, that is, half a circle.