Ac Synchronou Motor 3 Phase Wiring Diagram

Synchronous motors contain multiphase ac electromagnets on the stator of the motor that create a magnetic field which rotates in time with the oscillations of the line.

Ac synchronou motor 3 phase wiring diagram. The stator is the stationary part and the rotor is the rotating part of the machine. As the name suggests this motor runs at a constant speed from no load to full load in synchronism with line frequency. Commutator motors such motors have shunt speed characteristics ie. The three phase synchronous motor is a unique and specialized motor.

A synchronous electric motor is an ac motor in which at steady state the rotation of the shaft is synchronized with the frequency of the supply current. 1 introduction 2 synchronous machine structures 3 rotating magnetic field 4 equivalent circuit model 5 performance as a generator 6 performance as a motor introduction a synchronous machine is an ac rotating machine whose speed under steady state. Hence they find wide use in high speed lifts fans. They are ideally suited for drives requiring a uniform accelerating torque and continuously variable speed characteristics over a wide range.

For obtaining the high speed cylindrical rotor is used in the motor. The three phase ac supply is given to the stator of the motor. As in squirrel cage induction motors the speed of a synchronous motor is determined by the number of pairs of poles and the line frequency. In small motors this phase splitting is often done by use of a shaded magnetic pole or a capacitor.

A single phase motor in order to be self starting needs to internally split the phase in order to get the rotor started turning. Its stator winding which consists of a we provide three phase supply to three phase stator winding and dc to the rotor winding. The 3 phase stator winding carrying 3 phase currents produces 3 phase rotating. Synchronous motor and induction motor are the most widely used types of ac motor.

A three phase induction motor is basically a constant speed motor so its somewhat difficult to control its speed. Synchronous motors are a doubly excited machine ie two electrical inputs are provided to it. The speed control of induction motor is done at the cost of decrease in efficiency and low electrical power factorbefore discussing the methods to control the speed of three phase induction motor one should know the basic formulas of speed and torque of three phase induction. The rotation period is exactly equal to an integral number of ac cycles.

If the coils are energized one at a time in the sequence f 1 f 2 f 3 the rotor should point to the corresponding poles in turn. The 3 phase 4 pole per phase synchronous motor will rotate at 1800 rpm with 60 hz power or 1500 rpm with 50 hz power. The stator and rotor are the two main parts of the synchronous motor. Synchronous machines topics to cover.

Principle of operation synchronous motor.