Electromagnetic speed regulationAsynchronous motorBy the cage motor, electromagnetic slip clutch and DC excitation power supply(controller)Three parts. Dc excitation power is small, usually composed of single-phase half-wave or full-wave thyristor rectifier, changing the conduction Angle of the thyristor, can change the size of the excitation current.

       The electromagnetic slip clutch is composed of armature, magnetic pole and field winding. The armature has no mechanical connection to the latter, and both rotate freely. The armature is coaxial connected with the motor rotor, which is called the active part and driven by the motor;The magnetic pole is connected with the load shaft by a coupling, which is called the driven part. When the armature and the magnetic pole are both stationary, if the field winding passes DC, several pairs will be formed along the surface of the air gap circumferenceN,S An alternate magnetic pole whose magnetic flux passes through an armature.

       When the armature rotates with the drag motor, due to the relative motion between the armature and the magnetic pole, the armature induction generates eddy current, which interacts with the magnetic flux to produce torque, driving the rotor with the magnetic pole to rotate in the same direction, but its speed is always lower than the armature speed N1This is a slip speed regulation mode, changing the DC excitation current of the slip clutch can change the output torque and speed of the clutch.

       Speed control characteristics of electromagnetic speed control motor:

①Smooth speed regulation, stepless speed regulation;

②Speed loss, low efficiency;

③No harmonic impact on the power grid;

④The device structure and control line are simple, reliable and easy to maintain.

       This method is suitable for medium and low power production machinery which requires smooth movement and short time low speed operation.

       The above content is composed ofShengzhou Senli MotorProvided. Available if needed1688Search "Shengzhou Chaoli Electric Appliance Factory", or contact us directly0575-8378-1127.