woensdag 15 december 2010
woensdag 8 december 2010
The motor
The motor in the hair dryer is a direct current motor. The motor consists of a stator and a rotor and has the following principle of working:
- Contradictory poles attract each other
- Identical poles reject each other
That resulted in a rotating movement
- Contradictory poles attract each other
- Identical poles reject each other
That resulted in a rotating movement
We also need a AC-DC converter to convert a alternating current to a direct current. That happens with a bridge rectifier, which consists of 4 diodes.
Motor: Commutator
A direct current motor needs a commutator, which can change the direction of the current through the coils.
Here you see the principle of the the commutator:
When it rotates, it changes the direction of the current
woensdag 24 november 2010
dinsdag 16 november 2010
dinsdag 2 november 2010
zondag 31 oktober 2010
Parts: Insulation element
The insulation elements are around the heating element and protect the housing to overheating:
Parts: Switches
The hair dryer has two switches: one to control heat and one to control the air speed:
Parts: Elements to protect against dust
The hair dryer has 3 elements to protect against dust, filth,...
1. A gauze, between the two following elements
2.
3.
1. A gauze, between the two following elements
2.
3.
donderdag 21 oktober 2010
How hair dryers work
Interresting video that makes the working of a hair dryer clear:
"How hairdryers work":
http://science.discovery.com/videos/deconstructed-how-hair-dryers-work.html
"How hairdryers work":
http://science.discovery.com/videos/deconstructed-how-hair-dryers-work.html
woensdag 20 oktober 2010
Introduction
The sense of this task is to have a clear insight into the working of that hairdryer, to look what kind of materials they have used and to declare why they've used this materials.
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