Three-phase asynchronous motorIs the current production of the more widely used motor, there are two ways of wiring methods, star wiring (Y) and triangle connection (△But what happens if these two wires are miswired? belowMori machineXiaobian will take you to understand.

       Stator winding star running motor, each phase winding to withstand the voltage is the phase voltage, isThree-phase asynchronous motorRated voltage (line voltage)0.58About times, if the misconnection is triangular operation, that is, the phase voltage rises to the voltage specified by the manufacturer1.73About twice that. For example, the power supply voltage380V, connected star type, phase voltage is220V; Connected to the triangle, the phase voltage rises to380V; As the phase voltage of the winding rises, the core will be highly saturated, the excitation current of the core magnetic flux will increase sharply, and the current of the load in Jiangsu, then the stator winding current will increase greatly, so that the winding copper loss will increase sharply, which will lead to the stator winding overheating and burning.

       Stator windings for triangular operation of the motor, each phase of the winding to withstand the voltage, that isThree-phase asynchronous motorIf the rated voltage (power supply voltage) is misconnected into a star, then the voltage on each phase winding drops to the source voltage1/√3; For example, the power supply voltage is380VThe phase voltage will drop to0.58*380=220VCauses the torque of the motor to decrease to the rated torque1/3At this time, if the motor is still running with a rated load, in order to overcome the resistance of the load, it will cause the current of the motor stator to increase, which will lead to motor overload, resulting in heating, long-term operation will lead to burnout, power and efficiency will also decline.

       There is also a case if the load of the motor is light (less than the rated load)40%Right or left), then no large load current is required to generate electromagnetic torque to overcome the resistance moment. At this time, the triangular connection is a star connection, because the winding phase voltage is greatly reduced, the excitation current will be reduced, and the total stator current will be reduced, so the power factor and efficiency of the motor will be improved accordingly. The phenomenon of large horse-drawn trolley is generated, that is, the motor load is less than the rated load40%When, the motor is artificially changed from triangle type to star type, in order to achieve the purpose of energy saving and consumption reduction.

       The above content is composed ofThree-phase asynchronous motor manufacturersMori machineIt is provided,19Year motor brand,3KWbelowSmall power motor manufacturers. If you want to know more about this type of motor or are interested in learning about our products, please leave a message online or call us directly0575-8378-1127.