Operation of the alternator

Update:22 Sep 2021

First, let’s take a look at the operation of a simple alternator. The simple alternator consists of a single coil, which is supported and rotated between the two poles of a permanent magnet. Each end of the loop is connected to a conductive metal or alloy. The annular slip ring, the ring and the slip ring constitute the rotor. Two spring-loaded graphite brushes are installed on the fixed part of the motor, called the stator. Each brush is attached to a slip ring. When the rotor rotates, the slip ring and the brush make current flow into the loop. To make it easier for us to follow the rotation, one side of the conductive loop is black and the other side is white.

To understand the commutation operation of a DC motor, it is understood from the literal meaning that commutation means that the current of the motor through the commutator conductor reverses; when it is close to the north pole, tell the direction of the current inner conductor; in the conductor, The direction of the current is off the paper, so we say that the direction of the current in the conductor is the opposite.

Now, if we directly connect a load to a conductor, the current will be sinusoidal, so to obtain a unidirectional current, use a fixed part {commutator} and a moving coil; on any wire at the north pole, the direction of rotation will be counterclockwise Electricity flows to the surface of the paper. Therefore, the commutator contacts the conductor and connects the load to the commutator, from which we get a unidirectional current.

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