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A.C. (alternating current) is typically generated by converting mechanical, rotational energy, into electrical energy, with an alternator. The alternator has a rotating electrical field (rotor) which has two or more magnetic poles. The magnetic field of the rotor is produced by d.c. current through coils wound on the rotating iron core of the rotor. At minimum, the rotor has two magnetic poles, positive and negative.
The rotating magnetic field is magnetically coupled to coils that are wound inside the outer case of the alternator. These coils are called the stator, and they too are wound on an iron core that is built up of many thin laminations. There are two stator coils in a single-phase alternator and three in a three phase alternator. When the positive and negative poles of the rotor sweep past the stator coils, they cause electrical current in the stator coils to move in a particular direction through each coil and connected electrical circuit. The direction in each coil reverses when it becomes magnetically coupled to the opposite magnetic pole of the stator.
To produce a generated waveform of the proper frequency (60 Hz for the U.S. power grid), the alternator has to be rotated at a precise speed, 3600 rpm for an alternator with two poles, and 1800 rpm for an alternator with four poles. Alternators have been built with 20 or more poles for very low rpm machines.
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∙ 14y ago
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∙ 11y agorapidly intersecting changing magnetic fields and induction of current in the wire
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Can you generate direct current?
Direct current can be generated by a generator. Generators are not as efficient as alternators ( that generated AC power ). Vehicles use direct current but come equipped with alternators. The AC power is rectified ( changed to DC ) for use.
What are the reasons for generating energy as alternating current?
ENERGY CAN BE GENERATED ONLY AS A ALTERNATIG CURRENT.THERE IS NO WAYS OF GENERATING ENERGY AS A DC DIRECTY.IN CASE OF DC GENERATION ,AC IS GENERATED FIRST AND THEN RECTIFIED INTO DC. TO UNDERSTAND THIS CLEARLY YOU NEED TO KNOW THE WORKING OF GENERATORS. THE REASONS FOR GENERATING ENERGY AS AC IS ENERGY CANNOT BE GENERATED AS DC.
How can you block ac current?
You can block AC current by using a filter with a pass-band that is outside the frequency of the AC current.
What device converts dc current to ac current?
A "Rectifier" converts AC current to pulsating DC current.
What current flows in one direction then the opposite direction?
AC, Alternating Current.
What is the procedure of storing the ac current?
AC current cannot be stored, it must be used as it is generated.
How is AC current generated?
AC voltage, making AC current available, may be generated in several ways: * AC generator driven by * Steam turbine * Diesel motor * Petrol motor * Water turbine * Inverter from a DC source
How current is generated?
AC voltage, making AC current available, may be generated in several ways: * AC generator driven by * Steam turbine * Diesel motor * Petrol motor * Water turbine * Inverter from a DC source
Can you generate direct current?
Direct current can be generated by a generator. Generators are not as efficient as alternators ( that generated AC power ). Vehicles use direct current but come equipped with alternators. The AC power is rectified ( changed to DC ) for use.
What type of current is generated by the local electrical system?
The electrical grid distributes alternating current(AC).
Can solar energy be used to power AC electric motor?
Yes, but the DC current generated needs to be turned into AC first.
Is electricity generated by rotating magnets around copper coils AC or DC?
It is AC, alternating current. To create DC the generated power needs to go through a full wave rectifier.
What is generated when a permanent magnet is moved in front of a coiled wire and the magnet's magnetic field pushes and pulls electrons in the coiled wire?
an AC, or alternating current
What condition will sinusoidal voltage be generated in a coil of wire that rotates in a magnetic field?
a generator or alternator,if the magnetic is permanent the current produced from the coil will be alternating current ac.
What is the purpose of the inverter In a photovoltaic solar power plant?
Ernie Ramhoff
Why moving iron or hot wire type meters can be used for measuring both ac and dc quantities?
yes we can measure the ac and dc because current passes through certain resistance then heat generate. heat is square of current. so chang in direction of current does not effect on heat generated.
What are the reasons for generating energy as alternating current?
ENERGY CAN BE GENERATED ONLY AS A ALTERNATIG CURRENT.THERE IS NO WAYS OF GENERATING ENERGY AS A DC DIRECTY.IN CASE OF DC GENERATION ,AC IS GENERATED FIRST AND THEN RECTIFIED INTO DC. TO UNDERSTAND THIS CLEARLY YOU NEED TO KNOW THE WORKING OF GENERATORS. THE REASONS FOR GENERATING ENERGY AS AC IS ENERGY CANNOT BE GENERATED AS DC.
