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It's the bit that spins in the middle, turned by the the drive belt.

The rotor contains coils of wire, which are connected via slip rings to the control circuitry.

Dc power applied to the rotor, turns it into an electromagnet. This will then induce an AC current in the stator windings, as the rotor turns within it.

The strength of the 'rotor' electromagnet, can be varied by the control circuitry, to maintain the voltage and control the current demand.

The AC outputs from the stator coils are rectifed (ususally three phase) back into DC, for use in the cars electrical system and battery charging.

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How does ac electric motor convert in to an alternator?

a motor is a generator and a generator is a motor, if you are applying a voltage to turn the rotor its a motor and if you are turning the rotor and taking the voltage off the terminals its a generator or alternator.


Why the field windings are placed in rotor of alternator?

In an alternator, field windings are placed on the rotor to create a rotating magnetic field necessary for inducing electrical current in the stator windings. This configuration allows for a more compact design and enables the use of higher magnetic flux densities, improving the alternator's efficiency. By placing the field windings on the rotor, the alternator can generate a strong magnetic field while keeping the stator stationary, which simplifies the design and minimizes wear on the components. Additionally, this arrangement allows for easier cooling of the rotor and better control of the magnetic field strength.


How do you couple DC motor to alternator?

Shaft(rotor) of DC motor and Alternator(AC Generator) are alligned axially and radially to each other and connected.


Where does the voltage that is necessary for field excitation on the rotor originates from?

The excitation current is provided by a small self-excited pilot generator, attached to the same shaft as the alternator's rotor.


What is brushless excitation system?

3 phase synchronous generator or motor require DC current in the rotor. Conventional way of supplying DC requires use of commutators, which requires timely maintenance. To overcome this Brush less Excitation systems is used. Brushless Escitation system consists of one pilot excitor - DC generator with rotating PM as the field and the armature as the stator. The armature of the pilot excitor is connected to the stator of main excitor which is a 3-phase synchronous generator (please do not get confused, this is not our alternator but the exciter for the alternator). The rotor of the main exciter is connected to a diode bridge to get DC. This is connected to the rotor of our alternator.

Related Questions

Is there an alternator on a Yamaha Warrior 350?

Not in the same way as there is an external alternator in a car but there is a rotor and a stator inside the engine that serves a similar purpose.


What is the purpose of slip rings on an alternator?

Slip rings in an alternator serve the purpose of providing a continuous electrical connection between the rotating rotor and the stationary stator. They allow the alternating current generated by the rotor's magnetic field to be transferred to the external circuit while maintaining electrical isolation. This design enables the rotor to spin freely without tangling wires, ensuring efficient energy generation in the alternator.


What is the purpose of a stator in an alternator?

The stator in an alternator serves as the stationary component that houses the winding coils. Its primary purpose is to generate alternating current (AC) when the rotor, which is driven by the engine, spins within it. As the magnetic field from the rotor passes through the stator windings, it induces voltage, allowing the alternator to produce electrical power for the vehicle's electrical systems and recharge the battery.


What is the name of the rotating electromagnet in an alternator?

The rotating electromagnet in an alternator is called the rotor.


What is rotor in ac alternator?

A Rotor is a mechanism in the alternator that is driven by the pulley belt from the engine.which creates a magnetic field which causes voltage.Answer.The rotor does not 'create' a magnetic field. The emf induced in the stator winding is due to the residual magnetic flux of the rotor which cuts the stator windings as the rotor rotates.


If an alternator is being driven by a gasoline engine how is the speed of the alternator's rotor controlled?

by an amortisseur coil


What does a stator do on motorcycles?

If we are talking about a dynamo or an alternator, a stator has a rotor inside it. When the rotor turns, electricity is generated.


What is the purpose of an alternator?

The purpose of an Alternator is to periodically recharge the battery while the engine is on.


How does ac electric motor convert in to an alternator?

a motor is a generator and a generator is a motor, if you are applying a voltage to turn the rotor its a motor and if you are turning the rotor and taking the voltage off the terminals its a generator or alternator.


What are the main parts inside the alternator?

*stator *rotor *regulater *rectifier


What does the rotor on an alternator do?

The rotor on an alternator is a rotating component that creates a magnetic field. As it spins, this magnetic field interacts with the stator, which is fixed and contains coils of wire. This interaction induces an alternating current (AC) in the stator windings through electromagnetic induction, allowing the alternator to convert mechanical energy into electrical energy. The rotor's motion is typically driven by the engine's crankshaft.


What are the four main parts of a car's alternator?

The four main parts of a car's alternator are the regulator, rotor, stator, and diode bridge.