Which part of DC generator is known as mechanical rectifier?

commutator
The best-known type is the commutator, which is an integral part of a DC dynamo, but before solid-state devices became available, independent mechanical rectifiers were used for certain applications. Before the invention of semiconductors, rectification at high currents involved serious losses.

What is the mechanical rectifier in a DC motor called?

Commutator
Commutator: built on the shaft of the rotor at one end of the core. Made of copper bars insulated by mica. The commutator serves as a “mechanical rectifier”. Its main function, in a DC generator, is to collect the current generated in armature conductors and change it from internal AC to DC output.

What is a rectifier on a generator?

A rectifier is an electrical device that converts alternating current (AC), which periodically reverses direction, to direct current (DC), which flows in only one direction. The reverse operation is performed by the inverter. The process is known as rectification, since it “straightens” the direction of current.

Which part of DC generator is stationary?

A direct-current (DC) generator consists of two main parts, a rotating section and a fixed one. Stator is the stationary part of this system that includes a core, stator winding, and the outer frame and houses the rotor (the rotating part) in its core.

What are the main parts of a DC generator?

Parts of a DC Generator

• Stator. The main function of the stator is to provide magnetic fields where the coil spins.
• Rotor. A rotor in a DC machine includes slotted iron laminations with slots that are stacked to shape a cylindrical armature core.
• Armature Windings.
• Yoke.
• Poles.
• Pole Shoe.
• Commutator.
• Brushes.

What is the name of DC generator field DC?

There are three methods of excitation, and thus three main types of DC generators: Permanent Magnet DC Generators – Field coils excited by permanent magnets. Separately Excited DC Generators – Field coils excited by some external source. Self Excited DC Generators – Field coils excited by the generator itself.

What is the outer part of DC machine?

Yoke: The outer frame of a dc machine is called as yoke. It is made up of cast iron or steel. It not only provides mechanical strength to the whole assembly but also carries the magnetic flux produced by the field winding. Poles and pole shoes: Poles are joined to the yoke with the help of bolts or welding.

Why commutator is called a mechanical rectifier?

In a generator the commutator picks off the current generated in the windings, reversing the direction of the current with each half turn, serving as a mechanical rectifier to convert the alternating current from the windings to unidirectional direct current in the external load circuit.

Which is used as rectifier?

We know that the core use of rectifier is to convert AC current into DC current. The rectifier consists of semiconductor diodes to do this function….RELATED ARTICLES:

Power Of Alternating Current	Alternating Current (AC) and Direct Current (DC)
Full Wave Rectifier	Half Wave Rectifier

What is rectifier and types of rectifier?

Comparison of Different Types of Rectifiers

Properties	Half wave rectifier	Full-wave center-tap rectifier
Number of Diodes	1	2
D.C Current	Im / π	2 Im / π
Transformer Necessary	No	Yes
Max Value of Current	Vm / (rf + RL)	Vm / (rf + RL)

What are the parts of DC generator?

What is the rotating part of a generator called?

In most generators, the field magnet is rotating, and is part of the rotor, while the armature is stationary, and is part of the stator. Both motors and generators can be built either with a stationary armature and a rotating field or a rotating armature and a stationary field.