It is also called alternator or AC generator depending on their construction. It is also called Dynamo. The current is induced in either the rotor of AC generator or the stator of Alternator depending on its construction. The current is induced in the rotor. It generates an alternating current that reverses direction periodically. It generates a direct current that remains in only one direction. There are no commutators in AC generator.
It has commutators to supply unidirectional current. It uses a slip ring to transfer the induced current smoothly to the circuit. The generated output voltage amplitude is relatively higher. The output voltage amplitude is relatively lower. There are low energy losses in the slip rings of AC generator.
There are higher energy losses in the split rings of the DC generators due to sparks. There is no limitation of the voltage generated by the AC generator. The commutator can be damaged by increasing the voltage due to sparks between them. So DC generators have a voltage limit. The smooth operation of the slip ring increases the brushes life-time. The split ring wears out the brushes due to sparks between them. There is no issue of short circuit between the rings.
The brushes sliding across the split ring may cause a short circuit between them. It has relatively higher efficiency due to smooth operation of slip ring than DC generator.
It has relatively lower efficiency due to the inefficient operation of the split ring. It has a simple design. It has a complex design. The overall cost is low in the long run. Although the initial cost is higher than the DC generator. The overall cost is expensive due to costly maintenance, but the initial cost is lower than the AC generator.
But in a DC generator, a direct current flows in one direction. In an AC generator, the coil through which current flows is fixed, and the magnet usually moves. The south and north poles of the magnet make the current flow in opposite directions, thereby creating an alternating current. In contrast, the coil in a DC generator is not fixed; rather, it rotates in a fixed field. The two ends of the coil are attached to the commutator, which balances the charges to and from the generator , thus resulting in a current that does not alter direction.
The two backup generators are used for different purposes. An AC generator is used to power smaller electrical items in your business — such as coffee machines, computers, etc. On the other hand, a DC generator is used to power larger electric motors, even as big as those used in subway systems. The frequency in an AC generator is determined by the number of magnetic poles and the rotational speed.
Typically, AC generators have a frequency of 60 cycles per second. Overall, AC generators are the most common backup generators. But the decision for your power solutions will ultimately come down to what you need to be powered. That is why it is important to consider the differences between DC and AC to know whether you should be investing in an AC vs. Did you find apk for android? You can find new Free Android Games and apps.
Slip-rings have smooth and uninterrupted surfaces, which allow the brushes to remain in contact uninterruptedly with the slip ring surfaces. Hence, the brushes do not wear as quickly as in case of a DC generator and there is almost no possibility of a short circuit.
0コメント