A Synchronous Motor is a type of AC motor in which the speed of rotation of the shaft is the same as the frequency of the applied current. In other words, a synchronous motor works in the same way as an AC motor, with the difference that the total number of revolutions of a synchronous-type shaft is equal to an integer multiple of the frequency of the applied current.
The operation of a synchronous motor does not depend on the induction current. In this type of motor, unlike induction motors, there are multi-phase AC electromagnets on the stator that generate a rotating magnetic field. In synchronous, the rotor consists of permanent magnets that are synchronized with the rotating magnetic field and rotate synchronously with the frequency of the current applied to it.
Synchronous Motor
Due to their characteristics, synchronous motors are favored in applications that require precise speed control or high efficiency:
Industrial Equipment: In large-scale industrial applications, synchronous motors are used for equipment such as compressors, pumps, and fans. Their stable speed operation is essential for maintaining process consistency.
Generators: Synchronous motors are as integral in electric power generation as alternators or generators, where synchronized rotation is necessary for stable energy production.
Precision Machines: In CNC machines, robotics, and conveyor systems, synchronous motors provide accurate positioning and speed control.
Power Factor Correction: In power systems, synchronous motors can be used to improve power factor by reducing reactive power, thereby stabilizing the electrical network.
The advantage of using synchronous motors is that the power factor can be controlled. Over-excited synchronous motors have an over-excited power factor and operate in parallel with induction motors, thereby increasing the system power factor.
The speed remains constant regardless of the load in the synchronous motor. This quality helps industrial machines, which require constant speed regardless of load.
Synchronous motors have a wider air gap than Induction Motors, which makes them more mechanically stable.
The electromagnetic power varies linearly with the voltage in a synchronous motor.
Synchronous motors typically operate at higher efficiency than induction motors, especially at lower speeds.
Synchronous motors require DC excitation from an external power source.
These motors are not self-starting and require some external device to start and synchronize them.
The cost per kilowatt output is typically higher than that of induction motors.
The speed cannot be adjusted unless the input power frequency is adjusted.
They cannot be started with a load because it has zero starting torque.
Collector rings and brushes are required, which results in high maintenance costs.
Synchronous motors are not suitable for applications that require frequent starting of the machine.
We also offer Explosion-Proof Motors, please feel free to contact us if you need them.
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