Simply putThree-phase asynchronous motorThe main components are stator and rotor; The stator generates a rotating magnetic field inside the rotor through three-phase alternating current, and the metal wire of the rotor generates current through cutting the magnetic induction line operation. The rotation speed of the stator is always faster than the speed of the rotor is called asynchronous motor. todayMori machineXiaobian take you to understandThree-phase asynchronous motorSome speed regulation methods:

       Let's start with a formula:N=60*f/PWhat is the connection between this formula and our speed regulation method? Let's look down.

       NIt's the rotational speed,60Represents every minute (second),fDenotes the frequency,PRepresents the number of poles. So we can see thatN(Speed is related to frequency and number of poles, so we can choose to change the frequency and number of poles to achieve oneThree-phase asynchronous motorThe method of speed regulation is often said to be frequency conversion and pole change. How do these two methods work?

       Frequency conversion: by changing the frequency (50HZ), that according to this formula can be known, when the frequencyfhigherNThe higher the magnetic field speed, the higher the rotor speed;

       Pole change: changeP(polar number), this is usually done by external wiring, according to this formula can be seen,PThe smaller the number of poles, the corresponding speedNThe higher it will be; However, this method belongs to polar speed regulation, and the drop will be relatively large;

       In addition to these two methods, there is another method that can be changedThree-phase asynchronous motorThe speed is the variable pressure; Voltage change is unrelated to the above formula, is to change the motor torque by changing the output voltage, the greater the load torque speed will decline, is a speed regulation method to reduce power, is a more used a speed regulation method.

       But frequency conversion doesn't count. Frequency conversion just changesThree-phase asynchronous motorThe frequency but the power is not reduced; Here involves a problem, the fan speed is related to the rotor, in the case of no reduction in power, the heat is still the same size, but the speed decreases the cooling amount also decreases, so inThree-phase asynchronous variable frequency motorIn the motor, the fan is generally independent, to prevent the motor speed drops, the heat is unchanged, the fan exhaust air volume decreases, it is easy to cause the motor to burn, so the fan uses a separate motor to continue, rather than with the rotor changes.

       Mori machineproduction-marketingThree-phase asynchronous motorGood operation performance, material saving, simple structure, reliable operation, light weight, etc., using aluminum cast shell,180°High temperature resistant copper coil, cold rolled steel sheet, high precision rotor, can be customized according to customer requirements. If necessary, please fill in your information in the message board so that we can contact you, or directly call:0575-8378-1127.