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<p><a href="https://www.pm-<a href="https://www.pm-motor.com/direct-drive-permanent-magnet-motor" target="_blank">motor</a>.com/products" rel="noopener noreferrer" target="_blank">Synchronous motor</a> is the most important type of <a href="https://www.pm-motor.com/direct-drive-permanent-magnet-motor" rel="noopener noreferrer" target="_blank">motor</a>. </p><p>Generators in all power stations are <a href="https://www.pm-motor.com/direct-drive-permanent-magnet-motor" target="_blank">synchronous</a> motors, commonly referred to as <a href="https://www.pm-motor.com/products" rel="noopener noreferrer" target="_blank">synchronous generators</a> or AC generators. </p><p>Synchronous motor is known for its constant speed operation and is widely used in industry. </p><p>Whenever the change of flux is associated with mechanical motion, mechanical and electrical energy conversion occurs. </p><p>In the synchronous <a href="https://www.pm-motor.com/direct-drive-permanent-magnet-motor" rel="noopener noreferrer" target="_blank">motor</a>, the magnetic field winding is the main source of the magnetic flux. </p><p>Field windings and windings are placed on a common circuit consisting of two parts, the stator and the rotor stator. The stator is a static element. </p><p>It is the ring potion of the cylinder rotating the rotor. </p><p>Provide enough air clearance between the stator and the rotor. </p><p>The stator winding is located in a slot cut on the stator rotor. The synchronous motor adopts two rotor structures. </p><p>They are cylindrical and convex or convex rotors. </p><p>The DC field winding is embedded in the cylindrical polar rotor. </p><p>The cylindrical rotor provides greater mechanical strength and allows for more accurate dynamic balancing. </p><p>Especially used in high speed turbine generators. </p><p>The second type of synchronous motor I. e. </p><p>There are convex poles in the convex rotor. </p><p>These outstanding rods reduce the mechanical strength. </p><p>This rotor structure is used for low-speed applications such as hydropower. </p><p>The number of Poles in the rotor is large, making the rotor diameter larger and the length smaller. </p><p>The rotor shaft is carried on two bearings, which are located on two end caps connected by bolts on both sides of the rotor. </p><p>The stator and rotor are composed of silicon steel with high magnetic material. </p><p>The field winding provides a separate DC power supply from the exciter machine through a pair of carbon brushes. </p><p>The Exciter machine can be an external DC power supply or a DC generator coupled to the shaft of the synchronous motor. </p><p>How it works when the DC excitation provided to the rotor generates a fixed Arctic and South Pole in it. </p><p>The rotor generates a fixed flux in the air gap connected to the stator winding. </p><p>A synchronous generator is a device that converts mechanical energy into electrical energy. </p><p>When the rotor rotates with the help of the original motive, it generates a sine flux distribution in the air gap, which connects the stator winding and generates a sine alternating potential in it. </p><p>The frequency of the induced potential can be calculated using the following formula. </p><p>WhereP = number of stator poles. </p><p>Ns = rotor speed (rpm ). </p><p><a href="https://www.pm-motor.com/" rel="noopener noreferrer" target="_blank">Synchronous motor</a> is a device that converts electric energy. </p><p>Let the three-phase winding of the stator B connect to the three-phase power supply with fixed voltage and frequency. </p><p>As a result,</p><p>The phase current flowing through the stator winding produces a synchronous rotating magnetic field at a synchronous speed Ns. </p><p>Considering that the rotor operates in an auxiliary manner close to the synchronous speed in the direction of rotation of the stator magnetic field. </p><p>Now the rotor is in line with the synchronous rotating stator magnetic field step and operates precisely at the synchronous speed. </p><p>The mechanical and electrical torque is developed in the direction of rotation of the rotor, and the load torque is balanced. </p><p>It can be noted that the rotor falls back to an angle for a given load torque TL. </p><p>This angle is called a torque angle or a work angle. </p><p>The torque generated by the synchronous motor is given by the following expression. </p><p>Looking in the synchronous machine when the synchronous machine is running under stable load, the electrical and mechanical parts of the machine will inevitably have certain limited amplitude disturbances. </p><p>These disturbances are sudden changes in load, sudden changes in magnetic field current, harmonic changes in load and prime mover torque. </p><p>This disturbance produces oscillation in the machine. </p><p>This oscillating behavior is called hunting. </p><p>Hunting can be controlled by providing additional damper windings in the rotor.</p>
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