Select network Within a historical situation in which cars are necessary for many Americans, but in which there is growing awareness that oil is a limited and diminishing resource, the electric car would seem to be a highly promising invention. This technology, though, has been surrounded with controversy and debate over the past several years.
Resources An electric motor is a machine used to convert electrical energy to mechanical energy.
Electric motors are important to modern-day life, being used in vacuum cleaners, dishwashers, computer printers, fax machines, water pumps, manufacturing, cars both conventional and hybridmachine tools, printing presses, subway systems, and more.
The first states that an electrical conductor sitting in a magnetic field will experience a force if any current flowing through the conductor has a component at right angles to Electric motor research paper field.
Reversal of either the current or the magnetic field will produce a force acting in the opposite direction. The second principle states that if a conductor is moved Electric motor research paper a magnetic field, then any component of motion perpendicular to that field will generate a potential difference between the ends of the conductor.
An electric motor consists of two essential elements. The first, a static component which consists of magnetic materials and electrical conductors to generate magnetic fields of a desired shape, is known as the stator.
The second, which also is made from magnetic and electrical conductors to generate shaped magnetic fields which interact with the fields generated by the stator, is known as the rotor. The rotor comprises the moving component of the motor, having a rotating shaft to connect to the machine being driven and some means of maintaining an electrical contact between the rotor and the motor housing typically, carbon brushes pushed against slip rings.
In operation, the electrical current supplied to the motor is used to generate magnetic fields in both the rotor and the stator.
These fields push against each other with the result that the rotor experiences a torque and consequently rotates. Electrical motors fall into two broad categories, depending on the type of electrical power applied- direct current DC and alternating current AC motors. Since the only available electrical sources were DC, the first commercially available motors were of the DC type, becoming popular in the s.
These motors were used for both low power and high power applications, such as electric street railways. It was not until the s, with the availability of AC electrical power that the AC motor was developed, primarily by the Westinghouse and General Electric corporations.
Throughout this decade, most of the problems concerned with single and multi-phase AC motors were solved. Consequently, the principal features of electric motors were all developed by DC motor The operation of a DC motor is dependent on the interaction of the poles of the stator with a part of the rotor, or armature.
The stator contains an even number of poles of alternating magnetic polarity, each pole consisting of an electromagnet formed from a pole winding wrapped around a pole core.
When a DC current flows through the winding, a magnetic field is formed. The armature also contains a winding, in which the current flows in the direction illustrated. If the armature windings were to rotate round to the next pole piece of opposite polarity, the torque would operate in the opposite direction, thus stopping the armature.
In order to prevent this, the rotor contains a commutator which changes the direction of the armature current for each pole piece that the armature rotates past, thus ensuring that the windings passing, for example, a pole of north polarity will all have current flowing in the same direction, while the windings passing south poles will have oppositely flowing current to produce a torque in the same direction as that produced by the north poles.
The commutator generally consists of a split contact ring against which the brushes applying the DC current ride. The rotation of the armature windings through the stator field generates a voltage across the armature which is known as the counter EMF electromotive force since it opposes the applied voltage: The magnitude of the counter EMF is dependent on the magnetic field strength and the speed of the rotation of the armature.
The counter EMF increases with the rotation. The effective voltage across the armature windings is the applied voltage minus the counter EMF. Types of DC motor DC motors are more common than we may think.
A car may have as many as 20 DC motors to drive fans, seats, and windows.electric motor-engineering research paper recent free engineering research monstermanfilm.com RESEARCH & DEVELOPMENT: The This is a photo of a Gemini Electric Motor & Generator using the transformed induction system of wiring.
It works but is getting to complicated. This is a photo of a Gemini Electric Motor & Generator using the transformed induction system of wiring. The picture is obtained by spraying the paper . This paper shows the design criteria of ferrite permanent magnet assisted synchronous reluctance motors for a Formula SAE electric vehicle.
The electromechanical performance have been evaluated. Electric motor is an electric machine (electromechanical transducer), in which electrical energy is converted into mechanical energy, producing heat as the side-effect (Hughes 45). Universal collector motors are used in industrial and household electrical equipment (electric tools, fans, refrigerators, juicers, meat grinders, vacuum cleaners, etc.).
A Technical Research Report: The Electric Vehicle Prepared for Ann Holms The paper begins with a history of the electric vehicle, specifically the lows and highs of The electric vehicle (EV) is propelled by an electric motor, powered by rechargeable battery packs, rather than a gasoline engine.
From the outside, the vehicle does not .
|Research_and_Development||WBG high-voltage up to 20 kV device evaluation including maximum voltage and current without transformer: Electric, hybrid, and fuel cell vehicles need electric drive system components that are lightweight, compact, durable, and efficient.|
Background Research A simple electric motor makes electric energy. They work due to electromagnetic interactions, An electric motor is an electric machine that converts electrical energy into mechanical energy.