What is a Synchronous Motor?
Synchronous motor is a type of AC motor. A rotating machine that transforms electrical energy into mechanical energy using an AC source is known as an AC motor. Two varieties of AC motors exist:
- Synchronous motor
- Asynchronous motor(induction motor)
Synchronous motors are AC motors that spin at synchronous speed. A flexible rotor and a fixed stator make up a synchronous motor. Synchronous motors, like induction motors, use stator technology to produce a rotating magnetic field (RMF).
Synchronous Motor
A DC supply powers the rotor’s permanent-magnetic coils for synchronous motors. When an AC source delivers power to the stator, it generates a rotating magnetic field, or RMF. The rotor’s poles are polarity-different. Due to their differing polarities, the rotor magnetic field and stator RMF lock when they interact, causing the rotor to begin rotating at a synchronous speed while the RMF continues to move at a synchronous speed. Thus, they are also known as constant speed motors or synchronous motors.
The foundation of synchronous motors is the magnetic interlocking principle. Synchronous motors are started in the same way as induction motors, with the stator receiving an initial three-phase AC supply. A DC source is supplied to the rotor if the machine has reached its maximum speed, which is 90% of its speed.
When the armature winding is connected to a three-phase source, the armature generates a rotating magnetic field that rotates at a synchronous speed of 120 f/P. In order to attract the opposite pole of the rotating magnetic poles, we must first excite the permanent poles of the field winding produced by the DC source. The rotor will continue to rotate at synchronous speed if the magnetic poles are drawn to one another and locked.
Synchronous speed =[Tex]\frac{120f}{p} [/Tex]
Where , f= frequency
and p = no. of poles
Synchronous Motors
An electric motor that operates at a constant speed is known as a synchronous motor as the frequency of the AC voltage that is used and the rotor rotation are synchronized. The fixed connection between the stator and rotor magnetic fields is maintained by it. Imagine a world free of electricity, where every job is carried out by hand. Let us imagine for a moment a device that both is simple and moves in time with the electrical beat: a synchronous motor.
A Synchronous motor is fundamentally a fascinating electrical device that synchronizes with the rise and fall of electric currents. It synchronizes its rotation with the frequency of the alternating current, like a partner in dance following each step, forming a smooth transition between the electrical world and the physical world we live in. Its synchronous dance style separates it from its asynchronous equivalents, offering an accurate symphony in performance.
Imagine your daily ritual, the soft sound of your blender, and the grinding sound of your coffee grinder. The appealing mechanisms of synchronous motors, which silently power these appliances with a precision similar to a well-choreographed dance, are hidden behind these accepted sounds. Synchronous motors, in contrast to their asynchronous counterparts, are able to keep a firm hold on time, which enables them to rotate in perfect sync with electrical beats for dependable and efficient efficiency.
Table of Content
- What is a synchronous motor?
- Construction of synchronous motor
- Operations of synchronous motor
- Methods of starting Synchronous Motor
- Applications of synchronous motor
- Bringing synchronous Motors Up to Speed
- Types of Synchronous Motors
- Difference between Synchronous motor and Induction motor