Three-phase asynchronous ac motor electric speed formula?
The "extreme number" of a three-phase asynchronous motor is the number of magnetic poles specified in the subfield. The connection mode of stator winding is different, and different poles of stator magnetic field can be formed. The number of poles chosen for the motor is determined by the speed required by the load. The electric current of the motor is only related to the voltage and power of the motor. The three-phase ac motor generates N, S, magnetic poles for each coil, and the number of magnetic poles per machine is the number of poles. Because the poles come in pairs, the motors have two, four, six, eight... Extremely.
The three-phase asynchronous motor speed formula is n = 60f/p (1-s) F stands for power frequency P is the logarithm N 'stands for slip S stands for slip The three-phase asynchronous motor speed is graded, determined by the "extreme number" of the motor.
In China, the power frequency is 50 Hertz, so the synchronous speed of the dipole motor is 3000 RPM/min, and the synchronous speed of the quadrupole motor is 1500 revolutions per minute, and so on. The rotor of an asynchronous motor is always slower than or above its rotating magnetic field, and the name of asynchrony comes in. The difference between the rotor speed of the asynchronous motor and the rotational field speed (called the transvariation) is usually within 10%. Because of this, the actual speed of the three-phase asynchronous motor will be lower than that. If the synchronous speed of 6 is 1000 revolutions, the actual speed is 960 RPM/min.
