What is the principle of DC generator and motor?
Working Principle of a DC Generator A DC generator operates on the principle of Faraday’s laws of electromagnetic induction. According to Faraday’s law, whenever a conductor is placed in a fluctuating magnetic field (or when a conductor is moved in a magnetic field) an EMF is induced in the conductor.
What is the principle of DC generator?
A DC generator operates on the principle of electromagnetic induction i.e. when the magnetic flux linking a conductor changes, an EMF is induced in the conductor. A DC generator has a field winding and an armature winding.
What is the principle of direct current motor?
The basic working principle of a DC motor is: “whenever a current carrying conductor is placed in a magnetic field, it experiences a mechanical force”. The direction of this force is given by Fleming’s left-hand rule and its magnitude is given by F = BIL.
What is a direct current generator?
A direct-current (DC) generator is a rotating machine that supplies an electrical output with unidirectional voltage and current. The basic principles of operation are the same as those for synchronous generators.
What is the difference between DC generator and DC motor?
A DC motor has an input of direct current and gives an output of mechanical current. A DC generator has an input of mechanical current and gives an output of direct current. In a DC motor the current supplies from armature windings. In a DC Generator, the current is produced from armature windings.
What is a DC motor used for?
Small DC motors are used in tools, toys, and appliances. The universal motor can operate on direct current but is a lightweight brushed motor used for portable power tools and appliances. Larger DC motors are currently used in propulsion of electric vehicles, elevator and hoists, and in drives for steel rolling mills.
What are the uses of DC generator?
They are used as portable generators where low power supply is required. They are used in motorcycles as dynamos, in toys such as remote control cars and in appliances such as electric shavers. These generators find uses in arc welding in which huge drop in voltage and constant current are required.
What is the working principle of a generator?
Electric generators work on the principle of electromagnetic induction. A conductor coil (a copper coil tightly wound onto a metal core) is rotated rapidly between the poles of a horseshoe type magnet. The conductor coil along with its core is known as an armature.
Whats the difference between a motor and a generator?
An electric motor converts electricity into mechanical energy, providing a power source for machinery. A generator does the opposite of this, converting mechanical energy into electricity.
What are some applications of a DC motor and generator?
Hence, the use of DC machines, i.e., DC generators and motors are very limited. They are mainly used in supplying excitation of small and medium-range alternators. The Industrial Applications of DC Machines are in Electrolytic Processes, Welding processes and Variable speed motor drives.
What are the types of DC generator?
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 principle of direct current generator?
The direct current generator produces electric current (or voltage) base on the principle of electromagnetic induction. The figure below shows the change of the induced voltage when the coil is at different positions. Initially, the armature is vertical. No cutting of magnetic flux occurs and hence induced current does not exist.
What are the basic principles of operation of a magnetic generator?
The basic principles of operation are the same as those for synchronous generators. Voltage is induced in coils by the rate of change of the magnetic field through the coils as the machine rotates. This induced voltage is inherently alternating in form since the coil flux increases and then decreases, with a zero average value.
What is the working principle of a DC generator?
This EMF will cause a current to flow if the conductor circuit is closed. Hence the most basic two essential parts of a generator are: Conductors which move inside that magnetic field. Now that we understand the basics, we can discuss the working principle of a DC generator. You may also find it useful to learn about the types of DC generators.
What is the principle of DC motor?
The direct current (DC) motor – Principle of operation. Permanent magnet, where the magnetic flux in the motor is created by permanent magnets which have a curved face to create a constant air-gap to the conven-tional armature, located on the rotor. These are commonly used at powers up to approximately 3 kW.
