The method of variable pole number speed regulation is to change the stator pole number of the cage motor by changing the connection mode of the stator winding, so as to achieve the purpose of speed regulation; When the stator frequency is certain, changing the stator pole number can change the synchronous speed, the following is a simple understanding with Senli Motor Xiaobian.

       Using this speed regulation mode, you need toThree-phase asynchronous motorDuring operation, the wiring mode of the stator winding is changed; It is also possible to wrap two or three separate sets of windings with different pole numbers on the stator to form a two-speed motor or a three-speed motor, which will increase the cost, volume and weight of the motor.

       In addition, the asynchronous motor in this way must have an integer number of poles and a pair of poles.2Pole) when the synchronous speed is3000r/min, two polar pairs (4Pole) when the synchronous speed is1500r/min, triple pole (6Pole) when the synchronous speed is1000r/min. Therefore, variable pole speed regulation can only be a step speed regulation.

       It has the following characteristics:

       1.Hard mechanical properties, good stability;

       2.No slip loss, high efficiency;

       3.Simple connection, convenient control, low price;

       4.Step speed regulation, the step difference is large, can not get smooth speed regulation;

       5.It can be used with voltage regulation and electromagnetic slip clutch to obtain smooth speed regulation characteristics with high efficiency.

       This method is applicable to production machinery that does not require stepless speed regulation, such as metal cutting machine tools, elevators, lifting equipment, fans, pumps, etc.

       This method can only be used for squirrel-cage asynchronous machine, because the rotor needs to change poles synchronously with the stator, and the number of pole changes of the winding rotor is very troublesome, and the squirrel-cage rotor can automatically track the pole changes of the stator windings.

       Although the three-phase asynchronous motor with this speed regulation method has some shortcomings, its advantages are also obvious, easy operation, hard mechanical characteristics, high efficiency, suitable for both constant torque speed regulation and constant power speed regulation.

       Three-phase asynchronous motor manufacturers, Senli Motor,19Focus on the development and production of electric motors. Available if needed1688Search factory name "Shengzhou Chaoli Electric Appliance Factory" , Or online consultation message, we will have business personnel to get in touch with you, you can also contact us directly0575-8378-1127.