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Copy of Untitled Prezi

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by

Alex To

on 13 June 2013

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Transcript of Copy of Untitled Prezi

HOMOPOLAR MOTOR

GENERAL
Q
UESTION
How does the type of magnet effect the RPM of the copper wire?
SAFETY
Because the homopolar motor has moving parts, you should wear safety goggles at all times.
Because the battery is short-circuited by a piece of copper wire, this motor should only be run for very short times: it not only uses the battery very quickly, but also could heat it up, which is a potential safety hazard.
WHAT IS A HOMOPOLAR
MOTOR?
Neodymium
Hematite Magnet
DATA TABLE
Neodymium magnet
1
2
3
4
5
Hematite magnet
RPM
Type of Magnet
72
75
75
78
75
1
2
3
4
5
0
0
0
0
0
STEPS
The homopolar motor was first formed by a Frenchman during 1820, with the concept developed further in by a British scientist a year later in 1821. He demonstrated this first electric motor, known as a Homopolar motor.
A homopolar motor is a direct current electric motor with two magnetic poles. The magnets poles are constantly attracting and pushing the wires which are magnetized because of the electricity running through it. This makes the wires turn but only in one direction.
How it Works
How it is used today...
Turbines
Homopolar motors have been used in high-torque wind turbines. The mechanics of the motors provide a low-cost means of converting wind into electricity because of the reduced need for multidirectional gears. These motors also require less maintenance than bipolar motors.

Toys
Small engines, such as those in toy cars, can be built using homopolar motors. The spinning wheels create force, which causes the magnet to spin and create a magnetic field. This electricity flowing in one direction is used to power the engine.

Step 1
Step 2
Step 3
Step 4
By : Zachary Teh
and Alex To

Step 5 and 6
The End
Thanks for listening!
Hypothesis

If the type of magnet being used is weaker, then the rpm will be decreased.
Variables
The Independent variable is the magnet
The Dependent variable is the rpm
The Controlled variable is the copper wire
Full transcript