International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 04 | Apr 2024
p-ISSN: 2395-0072
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Air Core Generator Ms. Sneha Baliram Tambe1, Mr. Gopal Chaudhari 2 Ms. Sneha Baliram Tambe, Dept. of Electrical Engineering, YTIET ,Karjat, Maharashtra, India. Mr. Gopal Chaudhari, Dept. of Electrical Engineering, YTIET , Karjat, Maharashtra, India. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract – Due to environmental concerns arising from the
the rotor. The field cuts across the conductors and generates electricity, while the mechanical input causes the rotor to rotate. The rotor magnetic field can be generated by induction (in "brushless" generators), permanent magnets, or rotor windings with direct current through slip ring brushes automotive alternators uses brushes and sliprings. Which is used to regulate the voltage produced by the alternator by varying the current in the rotor field windings. Permanent magnet devices avoid losses due to magnetizing current in the rotor but are restricted in size due to due to the cost of the magnet material. Brushless AC generators are generally larger devices than those used in automotive applications.
frequent overuse of resources, attention has now shifted to non-renewable sources, especially solar and wind as these are environmentally cleaner and not environmentally friendly. Modern technologies incorporated in wind turbines have increased the limits of wind power generation to a greater extent in wind turbines. Thus, wind energy penetration has become increasingly important and requires robust, sophisticated and reliable networks. This paper presents the design and construction of a permanent magnet machine with an air core stator. Key Words: Air-cored stator, PM machines, Radial Flux Permanent Magnet (RFPM), neodymium magnet. Faraday’s law of electromagnetic induction.
1.3 Automotive alternators 1.3.1 Alternators are used in vehicles to charge batteries and power all electrical systems when the vehicle engine is running. A major advantage of alternators over directcurrent generators is that they do not use commuters, making them simpler, lighter and more robust than DC generators. The stronger construction of the alternator to turn at higher speed, allowing the automotive alternator to turn at twice the engine speed, improve when the engine is idling .Since about 1960, the availability of inexpensive solidstate diodes has enabled automakers to replace generators with alternators. Automotive alternators use a set of rectifiers (diode bridges) to convert AC to DC. Automotive alternators have three-phase windings which provide direct current with a low ripple.
1. INTRODUCTION GENERATION OF ELECTRICITY: In 1831-1832 Michael Faraday discovered that a potential difference is produced between the ends of an electrical conductor which moves perpendicular to a magnetic field. The first electromagnetic generator based on this effect, using a copper disc rotating between the poles of a horseshoe magnet which produces a small direct current. It is based on the principle that when a current carrying conductor coil or conductor is rotated in the permanent magnetic field, the e.m.f. is generated. However, due to the low power intensity, we provide a low voltage that can be increased if larger drives are used.
1.
1.3.2 Very large automotive alternators used in heavy equipment or emergency vehicles are capable of delivering 150 amps. Old automobiles with minimal lighting and electronics may only have a 30 amp alternator. Hybrid automobiles use a motor/generator combination that replaces the separate alternator and starter motor, running the internal combustion engine during start-up, providing additional mechanical energy for acceleration, bounce large battery storage when driving at constant speeds. A rotating magnetic field is a magnetic field that periodically changes direction. This is the basic principle of alternating current motors.
ALTERNATOR
1.1 An Alternator: An alternator is a generator that converts mechanical energy into electricity to produce alternating current. In theory any AC generator can be called an alternator, but the term generally refers to small rotating machines powered by internal combustion engines and other automotive.
1.2 Theory of operation Alternators produce electricity on the same principle as DC generators. When magnetic field lines cross a conductor, a current is induced in the conductor. An alternator generally has a stationary (stator) and a rotating (rotor). The stator has a winding of conductors and a rotting magnetic field in
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