The number of poles of the motor refers to the number of magnetic poles of the motor stator magnetic field, becauseThree-phase asynchronous motorThe stator winding connection mode is different, so the number of poles will be different; The role of the number of poles is actually to determine the load carried by the equipment and the required speed when we select the motor, which is determined according to this.
When the motor is running, the speed is affected by the number of poles, according to the formulan=60f/pVisible, wherePIs the number of motor poles, for example2Polar machinep=1=Number of motor poles/when2,Instead of the number of poles of the motor directly2.Three-phase asynchronous motorThe number of magnetic poles is a back and forth circuit formed by the motor winding, which generally appears in pairs; The pole is the magnetic pole, which means that the winding of these motors creates a magnetic field when the current is passed through it, and therefore the magnetic pole is created.
The more the number of motor poles, the lower the speed, is inversely proportional, and the three-phase asynchronous motor has this slip rate, compared with the synchronous speed will be low, the number of motor poles and synchronous speed is relative, according to the above formulan=60f/pWe know the following:
2The synchronous speed of the pole is3000r/min
4The synchronous speed of the pole is1500r/min
6The synchronous speed of the pole is1000r/min
8The synchronous speed of the pole is750r/min
The speed of different types of asynchronous motors will also be different, and you can consult the parameters of each motor manufacturer.
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