Wednesday, January 25, 2017

My Motor

 

Materials:

  • 24 gage metal wire
  • two nails
  • pice of coat hanger
  • various metal strips
  • lamp wire
  • base board (wood)
  • screws
  • gator clips
  • 6 volt battery
  • electrical tape
  • strap iron
  • vise

Building the Armature

When I built the armature, I used two nails, tape, a pice of coat hanger (for the shaft), and 24 gage metal wire. First, I taped two nails together with the heads on opposite ends. Then, I measured where the middle was, and pierced the tape and put the coat hanger through, leaving 2" sticking out on one side. 
After doing this, it was time to wrap the wire. I started from the middle, wrapped it to one side, went back to the middle, crossed over, and did the same to the other side. I left about 2" of wire left over and sanded off the varnish. 




 Building the Field Magnet

For the field magnet, I used a vise and bent strap iron in two places. I used multiple pieces to make the magnet stronger. I made sure that it was wider that the armature so that it could spin freely without interferences. 


 I used metal wire and wrapped it around the base of the field magnet about 400 times. I left about 5" of wire hanging out. After this, I wrapped it with electrical tape to protect it and I sanded off the varnish at the ends of the wire.

Building the Commutator

To build the commutator, I used electrical tape and aluminum foil. I wrapped the tape around the shaft, about 3/4" from the armature. I kept wrapping the tape until the cylinder it created was about 1/2" in diameter. For the terminals, I used aluminum foil. I cut out two pieces and folded them until they fit around about a quarter of the cylinder. I then taped the terminals running lengthwise on the cylinder with one end of the metal wire under each one. 

Making the Supports

I used different sized pieces of metal strips to make the supports for the shaft, brushes, and field magnet. 
  
Shaft support:
I cut two congruent pieces of metal. I then folded them in half length wise to make it stronger. Then, I left about 1/2 inch left at the bottom and folded it 90º. Then near the top, I drilled a hole in each. I made sure these holes were the same height. These holes would hold the shaft over the field magnet. 
I also drilled holes in the bottom so that I could eventually screw them into the wood. 

Brush support:
For the brush supports, I cut out two equal-sized strips of metal. I then left about 1/2" at the bottom and bent them at about 120º. I drilled a hole into the bottoms so that I could later screw them into the base. 
 

Field Magnet support:
To secure the field magnet to the base, I cut out a large strip of metal. I bent it over the base of the magnet to shape it and make sure it was the right size. Then I drilled holes on each side. I positioned the magnet on the wood and secured it by screwing on the support. 
 

Making the Brushes

To make the brushes, I used copper-strand lamp wire. I cut two pieces that were about 1 1/2" each. I then stripped the wire. Using electrical tape, I taped the brushes to the supports. 

 Assembling the Motor

To assemble the motor, I screwed in the shaft supports on either side of the field magnet. I also put the shaft in their supports and made sure the armature was positioned correctly in the field magnet. I then screwed in the brushes on either side of the commutator and made sure the brushes made contact with the terminals. I also taped one of the wires from the field magnet to one of the brush supports. To make the motor run, I connected one gator clip to the other brush support and the other to the other field magnet wire. 

MY MOTOR WORKING!!!!!😀

Lol, jk the video wouldn't work😁. Here's a link to the video instead: CLICK ON THIS!!!
Isn't it beautiful?





Electromagnetic Motors

Magnets

A magnet has a north and south pole. Two like poles repel each other and two unlike poles attract each other. A magnet produces a magnetic field. This is the space around a magnet. When another magnet enters the magnetic field of another, it can be attracted or repelled based on the poles. A magnet can be created by wrapping wire around a ferromagnetic material such as iron. Sending an electric current through this will turn the metal into a magnet. This technique is used when making motors. 


What is an Electromagnetic Motor?


An electromagnetic motor is a machine that converts electrical energy into mechanical energy. It can also be called an electric motor. The basis of any electric motor is an electromagnet. An electromagnet is created by wrapping loops of wire around a nail and connecting it to a battery. The nail then becomes a magnet with north and south poles. The nail spins when the poles of the magnet and the nail repel each other.

DC Motor

A DC motor is powered by a direct current. This means that the motor is powered by something like a battery. A DC motor always has an armature, field circuit, and commutator. 

AC Motor

An AC motor is powered by an alternating current. This means the motor is powered by generators, power grids, etc. 

Parts of a Motor

A motor is comprised of many different parts that work together. 

Rotor

The rotor is then moving part of the motor. It turns the shaft which then delivers mechanical power. There are conductors in the rotor to carry currents and interact with the magnetic field. This is sometimes called the armature (DC Motors). 

Stator

The stator is the electromagnetic circuit. This is also called the the field magnet. This magnet interacts with the rotor and the poles repelling each other results in it spinning. 


Commutator

The commutator switches the input. They are in contact with the brushes and are connected to the armature with wire. This keeps the motor spinning. It connects everything electrically and completes the circuit. 

History of Electric Motors

The first electric motors were created by Andrew Gordon who was a Scottish monk. Many other people contributed to this with principles, theories, and ideas. The first DC motor was constructed by William Sturgeon. He was a British scientist. AC motors came later than the DC motors. Walter Baily was the first person to build an AC motor. The first AC motors (without commutators) were created by Galileo Ferraris and Nikola Tesla. 

What are they used for?

Electric motors are used everywhere. They are used in fans, blowers, pumps, watches, and cars. They are found in many other tools and appliances because of their simple yet important function. Many things need a type of force to work, and a motor easily supplies that. 

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