The three phase induction motor is the most widely used electrical motor. Almost 80% of the mechanical power used by industries is provided by three phase induction motors because of its simple and rugged construction, low cost, good operating characteristics, absence of comutator and good speed regulation. In three phase induction motor the power is transferred from stator to rotor winding through induction. The Induction motor is also called asynchronous motor as it runs at a speed other than the synchronous speed. Induction motor is also called as asynchronous motor because it runs at a speed less than synchronous speed. Synchronous speed is the speed of rotation of the magnetic field in a rotary machine and it depends upon the frequency and number poles of the machine. An induction motor always runs at a speed less than …show more content…
It is very simple, from the name itself we can understand that there is induction process occurred. Actually when we are giving the supply to the stator winding, flux will generate in the coil due to flow of current in the coil. Now the rotor winding is arranged in such a way that it becomes short circuited in the rotor itself. The flux from the stator will cut the coil in the rotor and since the rotor coils are short circuited, according to Faraday's law of electromagnetic induction, current will start flowing in the coil of the rotor. When the current will flow, another flux will get generated in the rotor. Now there will be two flux, one is stator flux and another is rotor flux and the rotor flux will be lagging to the stator flux. Due to this, the rotor will feel a torque which will make the rotor to rotate in the direction of rotating magnetic flux. So the speed of the rotor will be depending upon the ac supply and the speed can be controlled by varying the input supply. This is the working principle of an induction motor of either
The force that that turns the armature comes from the magnetic field of the armature trying to line up with the external magnetic field of the stator. This force is called torque. This torque will cause the armature to turn until its magnetic field is aligned with the external field, but no further. How does the armature continue to spin? One of the magnetic fields must be changed so that the armature has to turn again. The armature will spin so long as there is always a torque acting on it. How this is accomplished is what sets each type of electric motor apart.
Tesla’s career as an inventor started when he was in his late twenties. He displayed his incredible understanding of electricity and physics when he created his first invention, the induction motor. The induction motor is a small, electric motor that has become a very useful machine. In fact, most household appliances run using Tesla’s induction motor (Vujovic 1). Score one for Tesla. Soon after he invented the induction motor, Tesla moved to America to try his luck at living the American dream. While in New York City, Tesla got the amazing opportunity to work for his hero, Thomas Edison. However, Tesla soon quit working for Edison due to some disagreements between the two inventors. And so with Edison and his men biting at Tesla’s heels, Nikola set out on his own to make a name for himself (Vujovic 1). Tesla soon became Edison’s greatest competitor. While tinkering in his lab with one of his inventions called the Tesla Coil, Tesla discovered that he could send and receive radio signals when his coils were tuned to the exact same frequency...
...late 17th century, and beginning of the 18th century, transportation was favored by American society so much, the wealthier would hire chauffer’s to take people places. So not only did the motor produce a better and more efficient life style, it also created a huge business industry, as we know it today called, “valeting”. The actual motor worked like this. “Two cups filled with mercury would contain a magnet and a wire with one being fixed and the other free to move. Whenever a current was passed through the wire, the free moving magnet or wire would revolve around its fixed partner due to the electromagnet forces being produced.” (History of Innovation). This first motor was a prime example of the fact that movement could be created by electricity and electricity could be created by friction. This motor was the most useful and applicable invention in the 1800’s.
Energy efficient motors use more copper and iron than regular motors. They also consume less energy than regular motors.
Today linear generators/motors have more widespread, not to mention less destructive, uses such as magnetically levitated trains, and renewable power generation.
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.
The idea of such a machine tantalized Tesla for years until one day at the age of 24 when he was living in Budapest working for the Central Telephone Exchange he had an epiphany and began making sketches that would soon develop into the world's first induction motor.
Just about 80% of the mechanical power utilized by businesses is given by three stage enlistment engines in view of its basic and tough development, ease, great working attributes, nonappearance of commutator and great speed direction. In three stage enlistment engine the power is exchanged from stator to rotor twisting through acceptance. The Enlistment engine is likewise called offbeat engine as it keeps running at a speed other than the synchronous speed. Like some other electrical engine enlistment engine additionally have two primary parts to be specific rotor and stator. A 3-stage enlistment engine has two principle parts (I) stator and (ii) rotor. The rotor is isolated from the stator by a little air-crevice which ranges from 0.4 mm to 4 mm, contingent upon the force of the engine. The primary body of the Enlistment Engine involves two noteworthy parts as shows in Figure
Starting Motor (starter)- This is a special type of an electrical motor designed to crank the engine at a speed high enough to permit it to start. It is capable of operating under heavy overload and creates great power, but only for a short time. When the starter is engaged, the driving pinion gear, which is attached to its shaft, is thrust forward to engage the teeth of the flywheel. The flywheel rotates the crankshaft to which is mounted, thus cranking the engine. As soon as the engine starts up, the driving pinion is automatically disengaged from the flywheel.
... that conversion device; converting linear electric current into a series of alternating pulses that caused the rotor to rotate. Because these conversion devices always used some energy in the process of linear to rotary motion, Tesla’s idea of a commutator-less motor seemed to Poschl that Tesla would be cheating Nature.” (TESLA) Poschl intended that what he said to Tesla would change his resolve from what would be Alternating Current (AC). Instead Tesla is fired up to this as if he were accepting a challenge.
So in this case, a DC motor, two sorts of magnetic(attractive) fluxes are available, ‘armature flux’ and ‘primary
An electric motor is a device used to convert electric energy into rotational kinetic energy. There are two different types of electric motors, and each has there own use. The different types are direct current and alternating current motors. Each of these motors will be analyzed in the following.
The basic Operation of turning is also one of the most important machining process that can produce a wide variety of parts. It can be defined as the removal of metal from the outer diameter of a rotating cylindrical workpiece. This Process requires a turning machine or lathe, work piece, fixture, and cutting tool. Turning operation is used to reduce the diameter of the work piece, based upon the specified dimension, and to produce a smooth surface finish on the metal. The material used in turning operation is generally a work piece generated by other processes like casting, forging, drawing, or extruding. Common materials like Aluminium, Brass, Magnesium, and Nickel, etc. used as a workpiece material in turning
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.
There are hundreds of occupation around the world, few of which anyone would want to do. Being an electrician is one of them. Electrician keep lighting, electrical system around a building and generator working. Being an electrician can also be dangerous. You can die if you get Electrocuted by touching cables that have running current through them.