It is not difficult to find inThree-phase asynchronous motorIn the process of use, its starting current is large, but the relative torque is not large, what is the reason for this? Today, Senli Motor Xiaobian will take you to understand this reason:

       The high current at start-up is due to the slip rateSIs the peak, relativeThree-phase asynchronous motorElectromotive force of rotorEAlso for the peak, so the starting current is very large; In popular terms, when starting, the rotor is not moving, but the stator rotating magnetic field cutting the rotor conductor speed will become large, the rotor generated in the induction potential will become larger, the relative starting current will be large;

       The reason for the small starting torque can be analyzed from two aspects, one is that the electromagnetic torque depends on the active component of the rotor winding current,S=1Rotor leakage reactance is peak, but the rotor side power factor is very low0.3So the active power component of the rotor winding current is very small when starting; The second isThree-phase asynchronous motorWhen the starting current is large, the leakage impedance voltage drop of the stator winding will increase. If the power supply capacity is small, the output voltage of the power supply will also decrease, which results in the decrease of the air gap magnetic flux of each pole, and then the decrease of the starting torque.

       The above content is composed ofThree-phase asynchronous motor manufacturersMori machineProvided, if you are interested in our products, welcome to leave a message online or call directly:0575-8378-1127.