What are DC machines?
A direct current (DC) motor is a type of electric machine that converts electrical energy into mechanical energy. DC motors take electrical power through direct current, and convert this energy into mechanical rotation.
What are types of DC machines?
Types of DC Motor
- Series DC Motor.
- Shunt/Parallel DC Motor.
- Compound DC Motors.
- Permanent Magnet DC Motor.
How many types of DC machines are there?
There are 3 main types of DC motor that are available: Series, Shunt and Compound. These terms relate to the type of connection of the field windings with respect to the armature circuit.
What is DC machine and transformer?
The working principle of a DC machine is when electric current flows through a coil within a magnetic field, and then the magnetic force generates a torque which rotates the dc motor whereas a transformer is an electrical equipment used to transfer electrical energy from one electrical circuit to another, or multiple …
What is the use of DC machine?
Generally, the DC machines are used in supplying excitation of an alternator and it is also used in many applications like welding process, variable-speed motor drives and electrolytic and electroplating process. Small DC machines are used as a control device such as speed sensing, positioning, and tracking.
What is DC machine diagram?
EMF Equation of DC Machine
| AC Motor | DC Motor |
|---|---|
| It has three input terminals like RYB. | It has two input terminals like positive and negative |
| The AC motor speed control can be done by changing the frequency. | The DC motor speed control can be done by changing the current of the armature winding |
What is the principle of DC machine?
The working principle of a DC machine is when electric current flows through a coil within a magnetic field, and then the magnetic force generates a torque that rotates the dc motor.
What is main part of DC machine?
Basic Components of a DC Machine
There are two main parts, the stator and the rotor. The stator contains parts such as brushes, magnets and housing for the whole motor. The rotor contains the windings, the communicator and the output shaft. The two parts work together when voltage is applied to create a moving motor.
What are the applications of DC machines?
The various applications of DC shunt motor are in Lathe Machines, Centrifugal Pumps, Fans, Blowers, Conveyors, Lifts, Weaving Machine, Spinning machines, etc.
What is the importance of DC machines?
DC motors offer highly controllable speed. By changing the armature or field voltage it’s possible to achieve wide speed variation and with this level of controllability, DC motors offer the precision required by a wide range of industry applications.
What are the components of DC?
These components are: a stator, a rotor, a yoke, poles, armature windings, field windings, commutator, and brushes. Many of its parts are the same as parts of AC motor, but with a little change.
What is DC motor principle?
The DC motor is the motor which converts the direct current into the mechanical work. It works on the principle of Lorentz Law, which states that “the current carrying conductor placed in a magnetic and electric field experience a force”.
What is the application of DC machine?
What is the importance of DC machine?
The main function of the DC generator is to convert mechanical power to DC electrical power, whereas a DC motor converts DC power to mechanical power. The AC motor is frequently used in industrial applications for altering electrical energy to mechanical energy.
What are the applications of DC machine?
What is DC motor working principle?
When kept in a magnetic field, a current-carrying conductor gains torque and develops a tendency to move. In short, when electric fields and magnetic fields interact, a mechanical force arises. This is the principle on which the DC motors work.
What are applications of DC machine?
Why is DC motor used?
Many applications require a high starting torque. The D.C. motor, by its very nature, has a high torque vs. speed characteristic, enabling it to deal with high resistive torques and absorb sudden rises in load effortlessly; the motor speed adapts to the load.
Where is DC motor used?
Owing to the fairly constant speed and medium starting torque of shunt DC motors, they are used in the following applications: Centrifugal and reciprocating pumps. Lathe machines. Blowers and Fans.
What is the advantages of DC machine?
What are the applications of dc machines?
What is the disadvantage of DC machine?
DC Motor Advantages & Disadvantages
| Advantages | Disadvantages |
|---|---|
| Inexpensive controls for speed regulation | Cogging at speeds of less than 300 rpm |
| Generally a low-cost motor option | Significant power loss on full wave rectified voltage |
| Easily pairs with gear reducers | High starting torque can damage reducers |
What is the advantage of DC machine?
DC motors have the advantage of: higher starting torque, quick starting and stopping, reversing, variable speeds with voltage input and they are easier and cheaper to control than AC. AC motor advantages include: lower power demand on start and minimal maintenance.
Where are DC machines used?
Owing to the high starting torque and variable speed of series DC motors, they are used in the following applications:
- Conveyors.
- Hoists, Elevators.
- Cranes.
- Electric Locomotives.