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Difference Between Dc Motor And Dc Generator Pdf

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Since our motors are very efficient, this is also true when operated as generators.

Electric motors play an essential role in almost every industry. Using the right type of motor with high-quality parts and regular servicing keeps your facility running smoothly and prevents damage to the endpoint equipment due to wear or power surges. Gainesville Industrial Electric can help your company select the right industrial electric motors and parts for your applications. Electric motors are machines that convert electrical energy—from either stored power or a direct electrical connection—into mechanical energy through the production of rotational force. The two major types of electric motors are:.

Brushed DC electric motor

The initial electromagnetic generator Faraday disk was invented by British scientist namely Michael Faraday in the year A DC generator is an electrical device used for generating electrical energy. The main function of this device is to change mechanical energy into electrical energy. There are several types of mechanical energy sources available such as hand cranks, internal combustion engines, water turbines, gas and steam turbines.

The generator provides power to all the electrical power grids. The reverse function of the generator can be done by an electric motor. The main function of the motor is to convert electrical energy to mechanical. Motors, as well as generators, have similar features. This article discusses an overview of DC generators.

A DC generator or direct current generator is one kind of electrical machine, and the main function of this machine is to convert mechanical energy into DC direct current electricity. The energy alteration process uses the principle of energetically induced electromotive force. This electromotive force can cause a flow of current when the conductor circuit is not opened. A DC generator is also used as a DC motor without changing its construction.

The construction of a 4-pole DC generator is shown below. But the two essential parts of this device are the stator as well as the rotor. The stator is an essential part of the DC generator, and the main function of this is to provide the magnetic fields where the coils spin.

This includes stable magnets, where two of them are with reverse poles facing. These magnets are located to fit in the region of the rotor. Rotor or armature core is the second essential part of the DC generator, and it includes slotted iron laminations with slots that are stacked to shape a cylindrical armature core.

Generally, these laminations are offered to decrease the loss because of the eddy current. The armature core slots are mainly used for holding the armature windings. These are in a closed circuit winding form, and it is connected in series to parallel for enhancing the sum of produced current. The external structure of the DC generator is Yoke, and it is made with cast iron otherwise steel. It gives the necessary mechanical power for carrying the magnetic-flux given through the poles.

These are mainly used to hold the field windings. In addition, the poles will give joint toward the yoke with the welding method otherwise by using screws. The pole shoe is mainly utilized for spreading the magnetic flux as well as to avoid the field coil from falling.

The working of the commutator is like a rectifier for changing AC voltage to the DC voltage within the armature winding to across the brushes. It is designed with a copper segment, and each copper segment is protected from each other with the help of mica sheets.

It is located on the shaft of the machine. The main function of the commutator in the dc generator is to change the AC to DC.

It acts like a reversing switch and its role in the generator is discussed below. The emf which is induced within the armature coil of the generator is alternating. So, the flow of current within the armature coil can also be alternating current. This current can be reversed through the commutator at the accurate moment once the armature coil crosses the magnetic unbiased axis. Thus, the load attains a DC or uni-directional current. The commutator guarantees that the flow of current from the generator will flow forever in a single direction.

The electrical connections can be ensured between the commutator as well as the exterior load circuit with the help of brushes. When a conductor is located in an unstable magnetic field, an electromotive force gets induced within the conductor. The induced e. If the conductor is present with a closed lane, the current which is induced will flow in the lane.

In this generator, field coils will generate an electromagnetic field as well as the armature conductors are turned into the field. Therefore, an electromagnetically induced electromotive force e. The classification of DC generators can be done in two most important categories namely separately excited as well as self-excited. In separately excited type, the field coils are strengthened from an autonomous exterior DC source.

In the self-excited type, the field coils are strengthened from the generated current with the generator. The generation of the first electromotive force will occur because of its outstanding magnetism within field poles. The produced electromotive force will cause a fraction of current to supply in the field coils, therefore which will increase the field flux as well as electromotive force generation. Further, these types of dc generators can be classified into three types namely series wound, shunt-wound, and compound wound.

There are different kinds of machines available in the market where the total input energy cannot be changed into output due to the loss in the input energy. So different losses can occur in this type of generator. For generators like shunt-wound, the field copper loss is equivalent to Ish2Rsh which is almost stable. For generators like a series wound, the field copper loss is equivalent to Ise2 Rse which is also almost stable.

For generators like compound-wound, the filed copper loss is similar to Icomp2 Rcomp which is also nearly stable. This loss mainly occurs because of the reversal of the armature core. Whenever the core supplies below one set of poles, then the core will finish one series of frequency reversal. This huge current is known as eddy current whereas the loss is called the eddy current loss. Stray losses mainly occur by combining the losses like core as well as mechanical.

These losses are also called rotational losses. Generally, generators are classified into two types like AC and DC. The main function of these generators is to change the power from mechanical to electrical.

An AC generator generates an alternating current whereas the DC generator generates direct power. This law tells that once a conductor shifts within a magnetic field then it slashes magnetic lines of force to stimulate an EMF or electromagnetic force within the conductor. Once the circuit of the conductor is closed then the emf can cause flow of current. These differences can assist students to study about this topic but before that, one should know about the AC generators as well as dc generators in every detail so that differences are very simple to understand.

The characteristic of the DC generator can be defined as the graphical representation among the two separate quantities. The most essential characteristics of this generator are discussed below.

The magnetization characteristics provide the difference of producing voltage otherwise no-load voltage through field current at a stable speed. This kind of characteristic is also known as an open circuit otherwise no-load characteristic. The load or external type characteristics provide the main relationships among the load current as well as terminal voltage at a stable speed.

The applications of different types of DC generators include the following. Thus, this is all about the DC generator.

Here is a question for you, what are the disadvantages of DC generators? What is a DC Generator? Share This Post: Facebook.

Classifications of DC machines : (DC Motors and DC Generators)

A brushed DC electric motor is an internally commutated electric motor designed to be run from a direct current power source. Brushed motors were the first commercially important application of electric power to driving mechanical energy, and DC distribution systems were used for more than years to operate motors in commercial and industrial buildings. Brushed DC motors can be varied in speed by changing the operating voltage or the strength of the magnetic field. Depending on the connections of the field to the power supply, the speed and torque characteristics of a brushed motor can be altered to provide steady speed or speed inversely proportional to the mechanical load. Brushed motors continue to be used for electrical propulsion, cranes, paper machines and steel rolling mills. Since the brushes wear down and require replacement, brushless DC motors using power electronic devices have displaced brushed motors from many applications.

General Information: Emergency Contact: Email: contactus powerplus. Is your business in need of an AC generator or a DC backup generator? Can you tell the difference between the types of generators available on the market and which one best fits your needs? Here is what you need to know so you can invest in the right generator for your business. In order to determine which generator you need, you should understand a few things first. For example, how do they work?

A dc generator is an electrical machine which converts mechanical energy into direct current electricity. This energy conversion is based on the principle of production of dynamically induced emf. This article outlines basic construction and working of a DC generator. Note: Theoretically, a DC generator can be used as a DC motor without any constructional changes and vice versa is also possible. These basic constructional details are also valid for the construction of a DC motor. Hence, let's call this point as construction of a DC machine instead of just 'construction of a dc generator'.


The most significant.


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The Electric Motor and Generator are differentiated on various factors like the main principle of working or function of the motor and generator. Consumption or production of electricity, its driven element, the existence of the current in the winding. The Difference Between the Motor and the Generator are explained below in the tabulated form. The motor and the generator are almost similar from the construction point of view, as both have stator and rotor.

Electro-Mechanical Systems DC MOTORS AND GENERATORS

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What is a DC Generator : Construction and Its Working

The initial electromagnetic generator Faraday disk was invented by British scientist namely Michael Faraday in the year A DC generator is an electrical device used for generating electrical energy. The main function of this device is to change mechanical energy into electrical energy. There are several types of mechanical energy sources available such as hand cranks, internal combustion engines, water turbines, gas and steam turbines. The generator provides power to all the electrical power grids.

Electricity has become an integral part of our daily lives. Most of the things we do and the devices that we use are dependent on electricity. For using power, there are different tools which help in making it favorable for personal use.

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DC motors as Generators

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Difference Between Motor and Generator

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