Speed formula of three-phase asynchronous motorn=60f/p, change the power supply frequencyfThe number of poles of the motorpCan achieve the purpose of changing the speed, from the nature of speed regulation, different speed regulation is nothing more than to change the synchronous speed of the AC motor or do not change the synchronous rotation of two.

       What we know nowThree-phase asynchronous motorSpeed regulation methods: variable pole logarithm speed regulation method, frequency conversion speed regulation method, cascade speed regulation method, winding motor rotor series resistance speed regulation method, stator voltage regulation speed regulation method, electromagnetic speed regulation motor speed regulation method and hydraulic coupler speed regulation method, these seven ways.

       The speed regulation methods that do not change the synchronous speed are widely used in production machinery: rotor series resistance speed regulation, chopper speed regulation, cascade speed regulation and the application of electromagnetic slip clutch, hydraulic coupling, oil film clutch speed regulation. The multi-speed motor that changes the synchronous speed changes the stator pole number, and the variable frequency speed regulation that changes the stator voltage and frequency can speed regulation of the non-commutating motor.

       From the point of view of energy consumption during speed regulation, there are two kinds of efficient speed regulation methods and inefficient speed regulation methods: efficient speed regulation means that the slip rate is unchanged, so there is no slip loss, such as multi-speed motors, frequency conversion speed regulation and speed regulation methods that can recover the slip loss (such as cascade speed regulation, etc.).

       The speed regulation method with slip loss belongs to low efficiency speed regulation, such as the rotor series resistance speed regulation method, the energy is lost in the rotor loop; Speed regulation method of electromagnetic clutch, energy loss in the clutch coil; Hydraulic coupler speed regulation, energy loss in the hydraulic coupler oil. Generally speaking, slip loss increases with the expansion of speed regulation range, if the speed regulation range is not large, the energy loss is very small.

       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.