The Operation of Electric Motors :: essays research papers

I have written this science research paper to help lot understand more about the electric motors and their operation. The electric motor transforms electric energy into mechanical energy, which in turn makes motion possible. To better understand electric motors, one should first understand the basics of electric motors operation, electro attracterics. bingle mess create an electromagnet by running an electric watercourse through a wire which in turn leave create a magnetised subject area. An electromagnet may only be a temporary magnet but it has the same magnetic properties as a permanent magnet. some(prenominal) magnet creates a magnetic heavens and this magnetic cranial orbit will contain two closures or polls, one North and one South. The complete law of magnets states that ?Opposites attract and likes repel? and the same holds true with an electromagnet. A aboveboard electromagnet can be created by the use of a major power ancestor and a piece of wire as sho wn in Figure 1. The magnetic domain of a function created will be stronger then the magnetic field of the earth, effecting the celestial orbit and will cause the needle to move in the direction of this pertly created magnetic field. As current flows through the wire, a magnetic field is created almost the wire. Figure 2 shows the circular shape of the magnetic field around the wire as if you were able to look down the end of the wire. The magnetic field itself is invisible, but the magnetic field strength can be measured through the use of special equipment. The magnetic field weakens the further you move away from the wire and will always be perpendicular to the wire and the fields direction depends on the which direction the current if flowing. Since the magnetic field is always circular and perpendicular to the wire, the magnetic field can be increased simply by creating a draw in of wire. Figure 3 shows an example of a simple electromagnet by coil a wire around a n ail and connecting it to a power source. The magnetic field is amplified by each loop of wire around the nail. An electric motor depends upon magnetism to function, to be more specific, electromagnetism. By unceasingly changing the direction of the electromagnetic field in a motor, we charter advantage of the basic magnet principle that ?Opposites attract and likes repel?. This allows an electric motor to rotate.