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What component causes a generator to produce dc voltage rather than ac voltage at its output terminals?
"...The main difference between a DC generator and an AC generator lies in the manner in which the rotating coil is connected to the external circuit containing the load..." Excerpt from: http://farside.ph.utexas.edu/teaching/316/lectures/node91.html In other words, the commutator that the brushes contact makes the difference between AC/ (semi) DC output. You can also use electronic switching these days to get DC from AC generators.
How is a DC waveform produced from the output terminals of a DC generator?
A DC waveform is produced from the output terminals of a DC generator through the action of a commutator, which converts the alternating current induced in the armature windings into direct current by reversing the direction of current flow at the appropriate times. As the armature rotates within the magnetic field, the commutator ensures that the output current remains unidirectional, resulting in a DC waveform at the generator terminals.
What is a device that produces direct current by means of magnetism?
A dynamo. It is hard to produce pure direct current using the induction of a magnet on a coil. In a rotating coil the north and south poles of a magnet will normally cause the current to flow the opposite way, every half turn. In a dynamo, the spinning electromagnet in the centre of the field coils, has many separate windings. The current is switched to each coil make sure the magnetism only has one polarity, at each fraction of a turn. This switch is called a commutator.
What is the basic difference between dc current and ac current?
DC (direct current) flows in one direction only, while AC (alternating current) changes direction periodically. DC is commonly used in batteries and electronic circuits, while AC is used in household electrical systems because it can easily be converted to different voltages using transformers.
What is the SI unit for direct current?
The SI unit of EMF (electromotive force) in a direct current circuit is Volts. The circuits current is measured in ampere's
What is the definition of commutator?
A commutator is an electrical switch that periodically reverses the current direction in an electric motor or electrical generator. A commutator is a common feature of direct current rotating machines.
Can a commutator obtain a alternating emf from a generator?
Yes, a commutator can convert the alternating current (AC) generated in a generator into direct current (DC). In a generator, when the coil rotates in a magnetic field, it produces alternating emf due to electromagnetic induction. The commutator acts as a switch that reverses the connection of the coil to the external circuit at the right moments, allowing for a unidirectional flow of current, thus providing a direct current output.
What are the parts of a direct current generator?
there are many parts of a dc generator armature, field coil, yoke, body, rotor and commutator.
What component causes a generator to produce dc voltage rather than ac voltage at its output terminals?
"...The main difference between a DC generator and an AC generator lies in the manner in which the rotating coil is connected to the external circuit containing the load..." Excerpt from: http://farside.ph.utexas.edu/teaching/316/lectures/node91.html In other words, the commutator that the brushes contact makes the difference between AC/ (semi) DC output. You can also use electronic switching these days to get DC from AC generators.
What is difference between output current and pulse current?
It is a language in electronics describing whether the output is a pulse or direct current for any output.
What is the role of a commutator in an electric generator?
The purpose is to counteract the feld distorsion that is caused by the armature current. If this is left as is , the commutation properties of the gnerator will be disturbed, the commutation will not take place in the neutral zone and brush sparking occurs. With correctly sized commutating poles the commutation at the brushes will be in the neutral zone regarless of armature current, no sparking occurs, and a anual adjustment of the brushgear position at different loads is not needed
What is the function of brushes and a split ring commutator and where are these items used?
Brushes and a split-ring commutator are key components in DC electric motors and generators. The brushes, typically made of carbon, maintain electrical contact with the rotating commutator, which reverses the direction of current flow in the windings as the rotor spins. This action ensures that the torque generated by the motor remains in the same direction, allowing for continuous rotation. In generators, the commutator converts the alternating current produced in the windings into direct current for output.
What is the use of brushes in an electric motor?
Brushes transfer electricity to the commutator which is connected to the winding on the armature. The brushes and commutator form a electrical connection that is good when the brushes are stationary and the commutator is spinning. The commutator on a DC motor is sectioned to power different windings at different times, creating moving field necessairy to pull the armature off a direct current.
What is the difference between ac voltage and dc voltage?
access current ( like plugs in your house ) direct current (like batteries)
What is the difference when selecting a cable between AC and DC current?
AC. is alternating current and Dc is direct current. alternating equivalant to pulsating electricity while direct is a constant draw with little fluxuation.
What is the difference between ac and dc grounding?
The difference AC and DC grounding is that AC is alternate current and DC is direct current. Grounding for both AC and DC is the same.
What is the difference between commutator and rectifier?
commutator also acts as an mechanical rectifier in the case of dc machines.by deviding the commutator into two parts that will accept the +ve cycle & ignore the -ve cycle.so it act as a rectifier.
