What is the difference of pole two, pole four and pole six electric spindles?
Time:2023-11-23
Views:19
The number of poles of the motor refers to the number of magnetic poles inside the motor, usually, the motor contains multiple coils, each coil will produce a magnetic field, and the number of poles of these magnetic fields is the number of poles of the motor. 2 poles, 4 poles, 6 poles and 8 poles are the most common number of motor poles, and the difference between them mainly lies in the difference in speed and power.
First of all, let‘s look at the relationship between the speed and power of the motor and the number of poles. In a motor, each coil creates a magnetic field, and these magnetic fields interact to create torque, which causes the motor to spin. There is an inverse relationship between the speed of the motor and the number of poles, that is, the more the number of poles, the lower the speed; The fewer poles, the higher the speed. At the same time, the power of the motor will also be affected by the number of poles, in general, the more the number of poles, the greater the output power of the motor.
Next, let‘s look at the specific differences between 2 -, 4 -, 6 - and 8-pole motors.
Synchronous speed formula: n=60f/p
In the above formula n -- the speed of the motor (RPM); 60 - per minute (seconds); f -- power supply frequency (Hertz); p -- number of rotating magnetic field poles of the motor
The synchronous speed of the 2-pole three-phase asynchronous motor is 3000r/min
The synchronous speed of the 4-pole three-phase asynchronous motor is 1500r/min
The synchronous speed of the 6-pole three-phase asynchronous motor is 1000r/min
The synchronous speed of the 8-pole three-phase asynchronous motor is 750r/min
Because the asynchronous motor has a slip rate, the actual speed is less than the synchronous speed, the specific actual speed is not the same as the motor produced by each manufacturer, but the difference is very small.
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