In operationThree-phase asynchronous motorIf a phase power supply is missing, the motor can continue to rotate at this time, but the speed will decrease. If the load is not reduced, the current of the motor stator will increase and cause overheating, which will burn the motor seriously. todayMori machineXiaobian will take you to understand the problem of whether the missing phase can be started.
Asynchronous motorPhase loss is often accompanied by vibration increase, abnormal sound, speed decrease, current increase and so on. If the stopped motor lacks a phase of power supply closing, it will produce a "buzzing" sound at this time, and it cannot be started at this time; Because a three-phase AC motor is started in a three-phase symmetrical winding (three sets of identical coils that differ from each other in the motor)120°Electrical Angle placement) Through the three-phase alternating current (each phase difference120°Electrical Angle), generating a rotating magnetic field, which can make the motor run; However, the single-phase pulsating magnetic field is generated in the stator core after the lack of communication, and this magnetic field can not make the motor produce starting torque.
When the motor is shut down, if there is an open phase winding or a phase of the power supply is disconnected (or missing), then the motor is started, and the magnetic field generated in the winding can be divided into two equal and opposite magnetic fields, and the torque generated by the rotor is equal and opposite; It cannot be started when the starting torque is zero.
Mori machineTips: When the motor is running without a phase, the power is only about half of the rated power, and the winding current will exceed the rated motor so that the motor shell will heat up, and the motor will burn out if it runs for a long time.
Asynchronous motor manufacturersMori machineIs a family with19Years of production research and development experienceSmall power motor manufacturers. The motor products produced and sold are widely used in plastic wire drawing machine, Buddha bead machine, all kinds of textile machinery, packaging machinery and other industrial equipment, the company can design and produce according to customer needs. If you are interested in our products, please contact us online or call us directly.0575-8378-1127.