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  • ABCD ABCD

    Member • Nov 25, 2013

    engine and alternators are two different stuffs.
    It produces emf and not current, which is dependent on the magnetic flux no of coils anf the frequency. EMF drives the electron to produce Current.
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  • ogundele kehinde samuel

    Member • Nov 27, 2013

    Pls, am so much intrested about dz topic.
    Pls, contribute...
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  • ABCD ABCD

    Member • Nov 30, 2013

    In what way are you interested?
    I already said the answer.
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  • Sarathkumar Chandrasekaran

    Member • Nov 30, 2013

    The current produced in Alternator is directly proportional to the Engine rpm.Higher the RPM higher the current output.You should note that there is a minimum speed of engine that should be attained to produce current which can power a 12V or 24V battery.
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  • Ramani Aswath

    Member • Dec 1, 2013

    An alternator is a machine that converts mechanical energy supplied into electrical energy. The grid operating frequency varies at different locations. There is a relation between the RPM, number of poles and the frequency. An alternator produces a specified voltage. When a load is applied the current increases. This will increase the torque on the shaft. The accelerator on the attached IC engine (Diesel engine for example) will increase the fuel input so that more power is generated.

    Please note: The speed has to be constant. Otherwise the frequency will change.

    A governor attached to the set automatically adjusts this.

    Here is some information on alternators:
    <a href="https://en.wikipedia.org/wiki/Alternator" target="_blank" rel="nofollow noopener noreferrer">Alternator</a>

    Here is some on diesel gensets:
    <a href="https://en.wikipedia.org/wiki/Diesel_generator" target="_blank" rel="nofollow noopener noreferrer">Diesel Generator</a>
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  • ABCD ABCD

    Member • Dec 1, 2013

    Agreed.
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  • vamsi kancharla

    Member • Jan 2, 2014

    sam76
    sir, I have a doubt that " How much current can alternator produce depending on the engines RPM ?
    for an alternator the RPM must be kept constant in order to maintain constant frequency and the emf induced depends up on the no of coils and amount of flux linked by the conductor and if we increase the field flux emf can be increased
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  • vamsi kancharla

    Member • Jan 2, 2014

    SarathKumar Chandrasekaran
    The current produced in Alternator is directly proportional to the Engine rpm.Higher the RPM higher the current output.You should note that there is a minimum speed of engine that should be attained to produce current which can power a 12V or 24V battery.
    the alternator mentioned by you belongs to automobiles where it is a dc generator if speed varies emf also varies but we should not say it as a alternator an alterantor is machine used to produce ac power supply generally these were seen in functions /domestic purposes in these machines rpm must be constant it should not be varied
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