# Essay on The Physics of an Electric Motor

1627 Words 7 Pages
The Physics of an Electric Motor

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.

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
Magnetic fields are generated by current loops. Naturally occurring magnetism originates in the current loops at the atomic level. In short moving electric charges create magnetic fields. That is the principal that makes electromagnetism exist. When a coil of wire is passed through a magnetic field current is created in the wire. This shows the relationship between electric and magnetic fields.

“…a current-carrying wire in a magnetic field does experience a force. Because and electric current is a stream of charged particles, motion of the charge must be important. As bizarre as it seems, the magnetic force on a charged particle is zero unless the charge is moving!

In addition, the direction of the magnetic force is probably not the direction you would predict…the wire experiences a force in a direction perpendicular to the wire and perpendicular to the magnetic field. Thus, we expect a charged particle moving in a magnetic field to experience a force that is a right angle to its velocity and to the magnetic field.

The strength of the force depends on the charge q, the strength of the magnetic field B, the velocity v, and the angle between the field and the velocity. The magnetic force is maximum when the field and velocity are perpendicular, Fmax=qvB “ (Kirkpatrick\Wheeler Pg. 528) The direction of the magnetic field is determined by the direction of current flow. If you were to grab a current carrying wire, with your thumb

## Related Documents

• ###### Essay The Electric Vehicle

The electric vehicle is no longer something exotic and futuristic to become a present need. The massive purchase of cars in emerging economies imposes a solution to avoid the irreversible deterioration of atmosphere , and the rising oil price, dwindling We Aboca an economy totally unsustainable. It is time to change the supplier by the plug. The figures are staggering. Today there are nearly one million cars circulating in the world, and in less than 40 years, the fleet will have doubled . Exponential…

Words: 1825 - Pages:
• ###### Essay on Electric Motors

Discover the leader in advanced electric motor technologies Remy Electric Motors A New Breed of High Performance Technology A century of experience and innovation has spawned an electric motor with unbridled power density and torque. Innovative HVHTM technology has revolutionized the market. It provides customers with a high-performance motor in a small package that is easily integrated into nearly all hybrid and electric applications. The Remy HVH has proven to be a versatile and reliable workhorse…

Words: 631 - Pages: 3
• ###### Essay Physics : Physics Of Science

Physics in football When you toss a football to one of your companions out in the back yard, you are applying material science ideas. You need to make changes for various variables, similar to wind, separation and weight of the ball. The more distant away the harder you need to toss it with the end goal it should get to him. These computations that happen in your mind is every one of the piece of material science, you simply don 't have…

Words: 1058 - Pages: 5
• ###### Essay The Physics Of Physics And Physics

The reason people can see through windows and not concrete is because glass is transparent to visible light while concrete is not transparent to visible light. Today, physics can explain how transparency works and allows people to apply the physics to everyday applications that make life better. Light reacts differently with different materials. Three things can occur when light encounters a medium. First, the light ray can be absorbed by the material. According to William Harris, absorption occurs…

Words: 1197 - Pages:
• ###### Essay Electric Cars : A Electric Car

most uncommon and unique are electric cars. The first electric car was invented many years ago, but it didn’t meet the required inspections and didn’t prove the efficiency on the roads until today. Nowadays, it’s possible to see more people driving the electric cars, however, most of them still prefer to drive older gasoline and hybrid vehicles. The main question is whether people and government must accept the idea of replacing older gasoline vehicles by the electric cars. This is a vexed question…

Words: 1197 - Pages:
• ###### Physics Essay

PHYSICS 205L – S.Y. 2014-2015 * TOPIC 6 * Ohms Law * Kirchhoff's Law * Direct Current Circuit * Current * A current (I) of electricity exists in region when a net electric charge is transported from one point to another in that region. * If a charge is transported through a given cross section of the wire in a time, then the current through the wire is I = q/t. * Where: q is in COULOMBS, t is in SECONDS and I is in AMPERES (1A = 1C/s). * BATTERY * A battery…

Words: 957 - Pages: 4
• ###### Electric Motor Essay

com/Read/25199/methods-optimize-electric-motor http://www.wisegeek.com/what-are-the-different-types-of-electric-motors.htm http://www.sciencebuddies.org/science-fair-projects/project_ideas/Elec_p009.shtml http://www.engrcs.com/club/SHEP/Motor_Overview.pdf for acceleration time n power rating http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/elemot.html http://www.oddparts.com/acsi/motortut.htm http://www.freescale.com/webapp/sps/site/overview.jsp?code=DRMTRELECTMTR Understanding Induction Motor Nameplate…

Words: 2556 - Pages: 11
• ###### Essay The Electric Vehicle Of Electric Vehicles

The idea of the electric vehicle has long captured the imagination of intelligent minds, including Henry Ford and Thomas Edison more than a century ago. As pollution and population increase, we turn to technology for a helping hand in the automotive industry. The idea of Electric Vehicles that require no fuel, no oil, minimal maintenance and can be charged in the comfort of your home is very appealing to the public. Not having to visit a gas pump would clearly grab the attention of anyone who has…

Words: 1380 - Pages: 6
• ###### Electric Car and Tesla Motors Essay

entrants is very high. Entering the electric automotive industry in 2003, Tesla itself faced the challenges of being the new entrant into the market having numerous financial troubles that required high capital investments, building the brand and distributions channels. However, for established manufacturers with considerable economic power to enter this market is relatively low due to their capabilities and governmental program support for developing electric vehicle (Shirouzu, 2011). There is a…

Words: 785 - Pages: 4
• ###### Essay on Physics

M11/4/PHYSI/SP2/ENG/TZ1/XX 22116511 PHYSICS STANDARD LEVEL PAPER 2 Candidate session number 0 0 Wednesday 11 May 2011 (afternoon) Examination code 2 1 hour 15 minutes 2 1 1 – 6 5 1 1 INSTRUCTIONS TO CANDIDATES • • • • • Write your session number in the boxes above. Do not open this examination paper until instructed to do so. Section A: answer all questions. Section B: answer one questions. Write your answers in the boxes provided…

Words: 2748 - Pages: 11