7.1 INTRODUCTION TO MOTORS Electric motor is a machine used to convert electrical energy to mechanical energy. In this project we used one DC motor, which is used as a fan that can controlled using android application. Electric motors are extremely important to modern-day life, being used in many different places, e.g., vacuum cleaners, dishwashers, computer printers, fax machines, video cassette recorders, machine tools, printing presses, automobiles, subway systems, sewage treatment plants and water pumping stations. The principles behind the operation of an electric motor are known as Ampere’s law and Faraday's law. The first states that when an electrical conductor is placed in a magnetic field, experience a …show more content…
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 …show more content…
A motor consists of a rotor and a permanent magnetic field stator. The magnetic field is maintained using either permanent magnets or electromagnetic windings . In any electric motor, operation is based on simple electromagnetism. A current-carrying conductor generates a magnetic field; when this is then placed in an external magnetic field, it will experience a force proportional to the current in the conductor, and to the strength of the external magnetic field. The internal configuration of a DC motor is designed to harness the magnetic interaction between a current-carrying conductor and an external magnetic field to generate rotational motion. Let's start by looking at a simple 2-pole DC electric motor (here red represents a magnet or winding with a "North" polarization, while green represents a magnet or winding with a "South"
The motor is turned on, the lower part begins turning its belt. The belt is made of rubber so it attracts more electricity than a regular belt would. The lower part builds to have a negative charge and the belt makes a positive charge. The reason this happens is because in the belt there is a silicon part that is built in the belt making it more negative than rubber, the lower part is taking electrons from the belt as it goes over the roller. Causing the electricity to go up into the sphere and flowing through it.
According to James Trefil (2015), the author of Electric Motor, “Anyos Jedlik (1800–1895) used one coil of wire on a rotating rotor and another coil as a stator, analogous to a rotor except that it stays put.” This is how use their idea to created a motor.
There are three types of magnets. Permanent, temporary, and electromagnets. Permanent magnets are the most common ones. Once they are magnetized they stay so (although they can lose much of their magnetic force). They can be metals found in nature. Temporary magnets hold the properties of a magnet while in a magnetic field, but lost these properties once the field goes away. An example of this would be a paper clip that is charged and can act like a magnet for a short while. Electromagnets are wires wrapped around a metal center(usually iron).
nacelle, which contains the gearbox and other power mechanical components.” (Scottish executive, 2007). Wind turbines can be determined in two styles that based on the direction of the rotating shaft (axis). One is horizontal axis, and the other is vertical axis. (Figure 1).
Anybody and everybody can become an industrial machinery mechanic; especially, those who are passionate about getting their hands plastered in motor oil, grease, and other mechanical lubricants. These people will more than likely be ecstatic about getting into industrial machinery mechanics. They need to be able to put in one hundred ten percent of their effort into becoming an industrial machinery mechanic. An industrial machinery mechanic’s overall objective on the job is to stop a mechanical error before it happens. An industrial machinery mechanics are often caught repairing, maintaining, and fabricating machinery. They will be required to have certain education and training as well as some on the job training or complete an apprenticeship program. They will receive many benefits for working in this particular field.
* Stator - This is the part that doesn't move. The rotor spins in the magnetic field contained in the stator.
Energy efficient motors use more copper and iron than regular motors. They also consume less energy than regular motors.
To understand how this motor works, we must understand the relationship between electricity, and magnetism, or simply put, electromagnetism. Direct electric current in a simple description: There are two requirements for current flow. The first is a source of electrical potential energy or EMF (electro motive force). The second is a conductor that provides a complete loop to carry the current. The reason a conductor will conduct is found at the atomic level.
The torque developed by the motor is proportional to the product of the armature of the current and air gap flux i.e.
electricity as the “fuel” instead of gasoline or some other combustible fuel. The electric motor in
A magnetic disk is a flat, circular, rigid sheet of aluminum coated with a layer of magnetic material (can be double sided). The material usually is a form of iron oxide with various other elements added. The disk rotates upon a central axis and a movable read/write head writes information along concentric tracks (circular paths traced out by motion of the disk) on it. Multiple disks can be stacked to store more information. Typically (1985) 11 disks with 22 surfaces, of which 20 are used (minus top/bottom), are manipulated to read/write data.
The necessity of motion to produce a current is due to the fact that electromagnetic induction involves a time-varying magnetic field. The same effects can be produced by moving the coil toward and away from a motionless magnetic source. In either case, the key to producing the current is certainly the motion of the magnet or the wire. The magnetic lines of the magnetic field must pass through a loop of the coiled wire.
In 1831, using his "induction ring", Faraday made one of his greatest discoveries - electromagnetic induction: the "induction" or generation of electricity in a wire by means of the electromagnetic effect of a current in another wire. The induction ring was the first electric transformer. In a second series of experiments in September he discovered magneto-electric induction: the production of a steady electric current. To do this, Faraday attached two wires through a sliding contact to a copper disc. By rotating the disc between the poles of a horseshoe magnet he obtained a continuous direct current. This was the first generator. From his experiments came devices that led to the modern electric motor, generator and transformer.
The stator is the stationary component while the rotor is the rotational component of the motor. Usually magnetic fields are created when an electric current is applied to a set of conductive wires wound together (Dixon, 2001). Magnetic fields can also be created using Permanent Magnets (PM). Electrical motors can also work as electrical generators (Correla, 1986). Electrical generators are devices capable of converting mechanical energy into electrical energy. An example would be a wind turbine which works as an electrical generator. It converts the mechanical energy of the rotating shaft caused by wind into electrical energy (Correla, 1986). The focus of this research will ...
A magnet is a solid object, usually made of metal iron, which has the ability to attract other materials (e.g., iron, steel, cobalt and nickel) within a magnetic field.