- Armature core & winding.
- Pole core & pole shoe.
- Yoke.
- Commutator.
- Field winding.
- Shaft.
- Main poles.
- Brushes.
Similarly, it is asked, what is main part of DC machine?
Construction wise there are four Main parts of DC machine namely field magnet, armature, commutator and brush. Actually a DC machine means a DC motor or a DC generator constructionally both are same. If rotor of a DC machine is rotated through means of a prime mover.
Additionally, what are ac and dc machines? A.C. motors are powered from alternating current (A.C.) while D.C. motors are powered from direct current (D.C.), such as batteries, D.C. power supplies or an AC-to-DC power converter.
Secondly, what are the different components of a DC machine?
Different Parts of DC Machine
- Yoke or Frame or Magnetic frame.
- Poles and Pole shoe.
- Armature.
- Armature winding and Field winding.
- Commutator.
- Brushes.
- Shaft.
What are the 3 types of DC motors?
There are three types of electrical connections between the stator and rotor possible for DC electric motors: series, shunt/parallel and compound (various blends of series and shunt/parallel) and each has unique speed/torque characteristics appropriate for different loading torque profiles/signatures.
17 Related Question Answers Found
What is the importance of DC machine?
Importance of D.C machines *Good speed regulation. *Torque speed characteristics of DC motors can be varied over a wide range while retaining high efficiency. Because of these reasons DC motors are used to drive devices such as fans, pumps, hoists, punch presses etc .
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. The compound motors are used where higher starting torque and fairly constant speed is required.
What does a DC motor consist of?
Every DC motor has 6 parts. Axle, Rotor, Commutator, Field magnets, and Brushes. The basic component of a DC motor is a current carrying armature which is connected to the supply end through the commutator segment and brushes. The armature is placed between two permanent magnets which produce a magnetic field.
What are the basic parts of a motor?
Electric motor designs can vary quite a lot, though in general they have three main parts: a rotor, a stator and a commutator. These three parts use the attractive and repulsive forces of electromagnetism, causing the motor to spin continually as long as it receives a steady flow of electric current.
How many types of DC current are there?
Types of DC Circuit The DC electric circuit is mainly classified into three groups. They are the series DC circuit, parallel DC circuit, and series and parallel DC circuit.
How many types of machines are there?
There are basically six types of machine: – used for raising a load by means of a smaller applied force. The lever. – involves a load, a fulcrum and an applied force. The pulley.
What is the purpose of commutator?
Function of commutator: To keep the torque on a DC motor from reversing every time the coil moves through the plane perpendicular to the magnetic field, a split-ring device called a commutator is used to reverse the current at that point.
What is the working principle of electric generator?
Principle: Electric generator works on the principle of electromagnetic induction. It converts mechanical energy into electrical energy. Construction: A loop ABCD is rotated in a permanent magnetic field. Its ends are connected with two semi-circular rings as shown in the figure below.
What is DC?
Washington, D.C. (also known as simply Washington or D.C., and officially as the District of Columbia) is the capital of the United States. It is a federal district. The President of the United States and many major national government offices are in the territory. “D.C.” stands for “District of Columbia”.
What is meant by DC machine?
A DC Machine is an electro-mechanical energy conversion device. The AC motor is invariably applied in the industry for conversion of electrical power into mechanical power, but at the places where the wide range of speeds and good speed regulation is required, like in electric traction system, a DC motor is used.
What is back EMF How is it created?
A motor has coils turning inside magnetic fields, and a coil turning inside a magnetic field induces an emf. This emf, known as the back emf, acts against the applied voltage that’s causing the motor to spin in the first place, and reduces the current flowing through the coils of the motor.
What is the current?
Current is a flow of electrical charge carriers, usually electrons or electron-deficient atoms. Physicists consider current to flow from relatively positive points to relatively negative points; this is called conventional current or Franklin current. Electrons, the most common charge carriers, are negatively charged.
What is armature reaction?
Armature reaction is effect of armature flux on main field flux. This causes an emf and hence a current in the armature. This current in armature produces another flux which lags the main flux. This is referred to as armature reaction.
How is AC converted to DC?
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 process is known as rectification, since it “straightens” the direction of current.
Which motor is better AC or DC?
AC induction motors use a series of coils powered and controlled by AC input voltage. Consequently, AC motors are less efficient than DC motors. In fact, the DC motor is 30% more efficient than AC motors due to the secondary magnetic field being generated from the permanent magnets rather than copper windings.
Can you run a DC motor on AC?
Yes. A DC series motor is capable of running when supplied with a single phase AC supply. This is because the torque, which varies as the product of the armature and field current, is always positive. Thus, a positive average torque causes the motor to rotate.
Which is best AC or DC?
DC is more efficient than AC power and has lower line losses than AC lines. With AC, the current travels on the skin of the conductor while with DC, the current flows throughout the entire conductor and not just the conductor skin. DC therefore has lower skin losses in the line.