For example, you have a stand-alone room fan with three speeds - low, medium, high. It seems that often the fan switch will go from "off" to "high", then "medium", then "low". This seems counter-intuitive, and also a waste of energy if you just want the fan to be on the low setting.
In a car, you never see this design on the blower knob for the air conditioner. That always goes from low to medium to high, as one would expect.
2006-12-14 06:34:56 · 6 answers · asked by cmsb705 5 in Science & Mathematics ➔ Engineering
There are many kinds of motors, classified on the basis of how they operate. Some of them are step down motors, step up motors,AC motors, DC motors etc...(These depend on the type of supply given to the rotors / stators of the motors)
Fans run with step down motors. They start with high speed and then they can slowed down if necessary.
Whereas the air conditioer work on step up motor which requires very less power to switch on and from there you can rise it.
Hope you will understand.
2006-12-14 09:26:17 · answer #1 · answered by Malu 2 · 2⤊ 1⤋
That is a very good question, and I bet there is an answer to it.
It could be that when you turn on a fan you almost always want it to be on the highest setting, so they put it first.
It could be that electrically it starts faster since you are using an electromagnetic motor to get the fan started you need a big burst of energy to get it moving, then once it is moving you can turn it down. I bet it helps with reliably and quickly starting the fan turning.
2006-12-14 07:00:21 · answer #2 · answered by themountainviewguy 4 · 1⤊ 0⤋
Probably because most people buy the cheapest (smallest) fan that will blow strong enough for what they want... So most of the time they run it on high...
As a long shot answer... I have seen fans where if you try to start it on low, it doesn't have enough power to overcome the initial static friction... maybe its needs the high power to kick it on...
2006-12-14 06:39:44 · answer #3 · answered by Leonardo D 3 · 0⤊ 0⤋
The bigger fans need more power to get started and setting it to high first allowes them to get that power before you set it to medium or low.
2006-12-14 06:43:33 · answer #4 · answered by funwithfantasy2000 3 · 0⤊ 0⤋
it must be overheating. Google for a application suggested as center Temp. it relatively is going to inform you the temps of your CPU. in the event that they are severe (around one hundred thirty and up) whilst idle, then it particularly is beneficial to back off of the OC. in the event that they are wonderful, then you certainly would desire to the two strengthen your vcore voltage so as that your CPU isn't ravenous of electricity at your modern overclock. or you need to in simple terms disable your OC and run inventory :).
2016-10-14 22:54:21 · answer #5 · answered by Anonymous · 0⤊ 0⤋
it's just the way that they are wired and programmed
2006-12-14 06:49:22 · answer #6 · answered by Anonymous · 0⤊ 1⤋