A DC electromagnetic generator produces direct power and also, electrical power (just like the AC generator). It is also produced based on same fundamental principle of Faraday’s Law of Electromagnetic induction where whenever a conductor cuts magnetic flux, dynamically induced electromotive force is produced, and this causes current to flow if the conductor/conductors is closed. The direction of induced current is given by Fleming’s right hand rule.…
* What is the function of a generator in a power plant? Convert mechanical energy to electrical…
The armature of a contactor is connected by a mechanical linkage to a set of contacts that causes a completed circuit when the armature is pulled into the magnetic field produced by the coil. The coil characteristics depend on the type of wire and the manner in which it is wound. Coils are designed to operated on 24volts, 120 volts, 208/240 volts, and 480 volts. Contactors are rated by the ampere draw they can carry. There are two types of loads that contactors can control: and inductive load which has a higher ampere draw on startup than while running; and a resistive load which has a constant ampere draw such as a resistance heater. Contacts are made of silver and cadmium (is a chemical element with the symbol Cd and atomic number 48. The soft, bluish-white metal is chemically similar to the two other metals in group 12, zinc and mercury), which resists sticking. The contacts are…
What part of a motor produces an inductive magnetic field within itself to facilitate the rotating motion? Rotor and stator.…
The contacts conduct electricity to the copper ring. The copper ring rotates rapidly but does not…
Batteries store energy in chemical form. They release energy by pumping electrons’ through wires from the minus pole to the plus pole. Devices inbetween convert this energy to another form, Efficieny- e.motor=85%, combustion= 20%…
9. What part of a motor produces an inductive magnetic field within itself to facilitate the rotating motion?…
During October 2, 2002 a series of murders started to happen around Washington D.C area, as well as in the Baltimore area. Five shootings attacks occurred in a fifteen hours period, which continued on for another three weeks. People were surrounded by fear and authorities did not have any clues of what or why these shootings were happening. Different messages and signs were left at the scene of the crime by the killer, but still nothing solid enough to have any suspects. The shootings took places in different establishments like, gas stations, restaurants, super markets, and even near schools. Victims were selected at random, and there was not a specific gender, age group, or even an ethnicity background that was being targeted. It was determined by investigators that the killings always occurred near highways in order for the shooter to have an easy access to an escape route. The weapon of choice used by D.C Sniper was a Bushmaster XM-15 semiautomatic .223 caliber rifle. There were not any witnesses that could offer any solid description or any information. The police set up hotlines so citizens could report any suspicious activity, as well as a mailbox to receive any tips via mail. However, not enough information was gathered ( FBI, 2007).…
LeBron James, who has been called "the best high school player ever," is a creative dunker with the explosiveness of Jordan and the passing ability of Magic Johnson. Not since Kareem Abdul-Jabbar was a high schooler in the '60s has a high school sensation gotten so much exposure and generated so much excitement. He is known as a call showstopper" who has, during his tenure at St. Vincent-St. Mary High School in Akron, Ohio, exhibited the kind of fan-pleasing ability that will likely make him the NBA's No. 1 draft pick on June 26.…
Third, ATV 's need some type of power plant to propel them. The types of…
A rotating magnetic field in the stator is the first part of operation. To produce a torque and thus rotate, the rotors must be carrying some current. In induction motors, this current comes from the rotor conductors. The revolving magnetic field produced in the stator cuts across the conductive bars of the rotor and induces an e.m.f.…
Squirrel-Cage Induction Machines. The rotor windings of a three-phase induction machine can take two forms. The simplest, least expensive, and most rugged is known as a squirrel-cage rotor. It consists simply of bars of aluminum with shorting rings at the ends. The squirrel cage is embedded in the laminated iron rotor by casting molten aluminum into slots cut into the rotor. In the squirrel-cage induction machine, there are no external electrical connections to the rotor. The other type of rotor construction is known as a wound rotor. Torque is produced in an induction motor assuming purely resistive impedances for the rotor conductors. However, the impedances of the conductors are not purely resistive. Because the conductors are embedded in iron, there is significant series inductance associated with each conductor.…
Many modern devices, such as the electric motor or the steam engine, are used today to convert mechanical energy into other forms of energy, e.g. electrical energy, or to convert other forms of energy, like heat, into mechanical energy.…
Most students of electricity begin their study with what is known as direct current (DC), which is electricity flowing in a constant direction, and/or possessing a voltage with constant polarity. DC is the kind of electricity made by a battery (with definite positive and negative terminals), or the kind of charge generated by rubbing certain types of materials against each other.…
Above is the basic construction of an AC motor. It consists of a couple of magnets with opposite polarities from each other. The purpose of these magnets is to create a magnetic field in between them whose direction is such that it will remain perpendicular to the coil at every point of rotation. For this purpose the poles of the magnets are made concave to concentrate the magnetic field towards the centre. A rectangular coil of soft iron core wounded with copper wire is placed freely in between the magnets which are connected with the AC terminals through a pair of slip rings known as carbon brushes to prevent wear and tear of the coil and to minimize the frictional…