What is cold rolled grain oriented silicon steel?

CRGO is the abbreviation for Cold Rolled Grain Oriented Steel, which is used in particular to laminate any heavy transformer as a core. CRGO steel has exceptionally high mechanical elasticity and magnetic properties in the rolling direction.

Which material is used for construction of stator core?

The stator core is built up of segments of electrical sheet steel, usually 2–3\% silicon, 0.35 mm thick, cold rolled and non-oriented.

Why are the stator and rotor cores laminated?

Lamination is necessary since a voltage is induced along the axial length of the steel as well as in the stator conductors. The laminations are insulated from each other usually by a varnish layer. This breaks up the conducting path in the steel and limits the losses (known as eddy current losses) in the steel.

What is a stator of synchronous machine made of?

The stator core is made of silicon steel material. It is made from many stamps which are insulated from each other. Its function is to provide an easy path for the magnetic lines of force and accommodate the stator winding.

What is non oriented electrical steel?

Non-oriented electrical steels (NOES) are the most widely used core material for electric motors, generators and alternators, due to their high magnetic permeability, high magnetization saturation, low core loss, and relatively low cost [1], [2], [3], [4], [5].

What is non grain oriented electrical steel?

Electrical steel made without special processing to control crystal orientation, non-oriented steel, usually has a silicon level of 2 to 3.5\% and has similar magnetic properties in all directions, i.e., it is isotropic. Cold-rolled non-grain-oriented steel is often abbreviated to CRNGO.

What does a stator do in an alternator?

What is an main stator in an AC alternator? The main stator is the main component part an AC generator (or alternator). It is where the electrical energy is created to supply a load. The alternators excitation system attempts to control the voltage generated in the main stator to a preset point.

What material is a stator made of?

The stator frame consists of laminations of silicon steel, usually with a thickness of about 0.5 millimetre. Lamination is necessary since a voltage is induced along the axial length of the steel as well as in the stator conductors.

Why stator is laminated?

What is a three-phase alternator?

The three-phase alternator, as the name implies, has three single-phase windings spaced such that the voltage induced in any one phase is displaced by 120º from the other two.

Why are the teeth of a stator core slits?

To accommodate stray flux impinging on the ends of the core, the ends of the teeth are commonly slit to reduce eddy currents that are produced in the end punchings. It is common to cool the stator core with gas (air or hydrogen), and radial ducts are generally provided in the core for this purpose. Water cooling is used by some manufacturers.

What is the working principle of a three phase generator?

The three-phase windings of the inner stator are spaced 120° electrical degrees apart. In addition, the conductor of each winding is distributed such as a sinusoidal wave. Therefore, when the current flows into the three-phase windings, the magneto motive force (MMF) of the sinusoidal waveform is produced by the current.

How does the rotor of a stator work?

As the rotor assembly rotateswithin the stator winding. The alternating magnetic fieldfrom the spinning rotor inducesan alternating voltage into thestator winding. The strength of the magneticfield and the speed of the rotoraffect the amount of voltageinduced into the stator.