The working principle of a DC Shunt Motor is, whenever a DC motor is turned ON, then DC flows throughout stator as well as the rotor. This current flow will generate two fields namely pole as well as the armature. … The commutator overturns the armature current flow direction at ordinary gaps.
Why is DC shunt motor used?
Since torque is proportional to armature current, torque also increases. Finally, this increased torque allows the motor to increase its speed and compensate for the slowdown due to loading. Hence, a DC shunt motor is able to self-regulate its speed, and can be referred to as a constant speed motor.
How does a DC motor work simple explanation?
Electric motors turn electricity into motion by exploiting electromagnetic induction. The motor features a permanent horseshoe magnet (called the stator because it’s fixed in place) and an turning coil of wire called an armature (or rotor, because it rotates). …
What are the characteristics of DC shunt motor?
Characteristics of a DC Shunt Motor:
- Speed-Armature Current Characteristic: …
- Torque-Armature Current Characteristic: …
- Speed-Torque Characteristic: …
- Break in Field Circuit of a DC Motor:
What are the advantages of DC motors?
Below are some advantages of DC motors that you should consider:
- Good speed control. DC motors offer highly controllable speed. …
- High torque. …
- Seamless operation. …
- Free from harmonics.
What are the applications of DC motor?
DC machines are also used in applications where high starting torque and accurate speed control over a wide range are important. Major applications for DC motors are: elevators, steel mills, rolling mills, locomotives, and excavators. Like other rotating machines, DC motors result from the interaction of two magnets.
What are the 3 types of DC motors?
Main Types of DC Motors
- Permanent Magnet DC Motors. The permanent magnet motor uses a permanent magnet to create field flux. …
- Series DC Motors. In a series DC motor, the field is wound with a few turns of a large wire carrying the full armature current. …
- Shunt DC Motors. …
- Compound DC Motors.
What are the parts of a DC motor?
These components are: a stator, a rotor, a yoke, poles, armature windings, field windings, commutator, and brushes.
What is shunt current in dc motor?
A DC shunt motor (also known as a shunt wound DC motor) is a type of self-excited DC motor where the field windings are shunted to or are connected in parallel to the armature winding of the motor. … Though there are separate branches for the flow of armature current and field current – as shown in the figure of below.
Why DC shunt motor is constant speed?
If the load on the motor increases armature speed reduces and thereby cause a reduction in the back emf. … Hence, a DC shunt motor always maintains a constant speed. Under no load condition, the back emf becomes nearly equal to the applied voltage.
What is mean by DC shunt motor?
A shunt DC motor connects the armature and field windings in parallel or shunt with a common D.C. power source. This type of motor has good speed regulation even as the load varies, but does not have the starting torque of a series DC motor.
What is disadvantage of DC motor?
Disadvantages of DC Shunt Motors
Installation of DC machines is expensive compare with other types of machines. Since Shunt motors are constant speed motor, it would be a disadvantage where it’s necessary to operate under variable speed. DC motors are unreliable at low speeds operations.
Why is AC motor preferred over DC?
The main advantage of Ac motor over Dc motor is that the speed – torque characteristic of AC motor is very close to the ideal characteristic. Torque of Ac motor is constant upto certain speed and then decreases, but in case of Dc motor torque linearly decreases as speed increases.
Which motor is more powerful AC or DC?
AC motors are generally considered to be more powerful than DC motors because they can generate higher torque by using a more powerful current. However, DC motors are typically more efficient and make better use of their input energy.