Hong Kong E60 sub-Forum
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Hope the result will not be too cold and too MK la.....
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Electric king, I got a stupid electric question (cos I return all my phys knowledge to teacher long time ago!)
I got an electric fan which is rated 56W, so the working current should be about 0.25A at full load (max speed), right?
Recently, I found that the fan motor is a bit hot after using for a short period of time. Then I tried to measure the current it has been drawing using a multimeter. I found that when the fan is running at the lowest speed(motor is cold and just started), the current is already 0.22A, then I turn the speed to highest, the current is about 0.45A. Oh..one more information, I measured it both with the blade putting on and also putting off but the result is similar.
Does it mean that the motor bearing is almost died so that it draws more current then normal?
Sorry guys,
I got an electric fan which is rated 56W, so the working current should be about 0.25A at full load (max speed), right?
Recently, I found that the fan motor is a bit hot after using for a short period of time. Then I tried to measure the current it has been drawing using a multimeter. I found that when the fan is running at the lowest speed(motor is cold and just started), the current is already 0.22A, then I turn the speed to highest, the current is about 0.45A. Oh..one more information, I measured it both with the blade putting on and also putting off but the result is similar.
Does it mean that the motor bearing is almost died so that it draws more current then normal?
Sorry guys,
![Offtopic](https://5series.net/forums/images/smilies/imported/offtopic.gif)
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Electric king, I got a stupid electric question (cos I return all my phys knowledge to teacher long time ago!)
I got an electric fan which is rated 56W, so the working current should be about 0.25A at full load (max speed), right?
Recently, I found that the fan motor is a bit hot after using for a short period of time. Then I tried to measure the current it has been drawing using a multimeter. I found that when the fan is running at the lowest speed(motor is cold and just started), the current is already 0.22A, then I turn the speed to highest, the current is about 0.45A. Oh..one more information, I measured it both with the blade putting on and also putting off but the result is similar.
Does it mean that the motor bearing is almost died so that it draws more current then normal?
Sorry guys,![Offtopic](https://5series.net/forums/images/smilies/imported/offtopic.gif)
I got an electric fan which is rated 56W, so the working current should be about 0.25A at full load (max speed), right?
Recently, I found that the fan motor is a bit hot after using for a short period of time. Then I tried to measure the current it has been drawing using a multimeter. I found that when the fan is running at the lowest speed(motor is cold and just started), the current is already 0.22A, then I turn the speed to highest, the current is about 0.45A. Oh..one more information, I measured it both with the blade putting on and also putting off but the result is similar.
Does it mean that the motor bearing is almost died so that it draws more current then normal?
Sorry guys,
![Offtopic](https://5series.net/forums/images/smilies/imported/offtopic.gif)
Contributors
Join Date: Sep 2007
Location: Hong Kong
Posts: 3,019
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Received 0 Likes
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My Ride: 530i
Mods: M5 sporty package, M5 Steering wheel, Sprint Booster
![Default](https://5series.net/forums/images/icons/icon1.gif)
Electric king, I got a stupid electric question (cos I return all my phys knowledge to teacher long time ago!)
I got an electric fan which is rated 56W, so the working current should be about 0.25A at full load (max speed), right?
Recently, I found that the fan motor is a bit hot after using for a short period of time. Then I tried to measure the current it has been drawing using a multimeter. I found that when the fan is running at the lowest speed(motor is cold and just started), the current is already 0.22A, then I turn the speed to highest, the current is about 0.45A. Oh..one more information, I measured it both with the blade putting on and also putting off but the result is similar.
Does it mean that the motor bearing is almost died so that it draws more current then normal?
Sorry guys,![Offtopic](https://5series.net/forums/images/smilies/imported/offtopic.gif)
I got an electric fan which is rated 56W, so the working current should be about 0.25A at full load (max speed), right?
Recently, I found that the fan motor is a bit hot after using for a short period of time. Then I tried to measure the current it has been drawing using a multimeter. I found that when the fan is running at the lowest speed(motor is cold and just started), the current is already 0.22A, then I turn the speed to highest, the current is about 0.45A. Oh..one more information, I measured it both with the blade putting on and also putting off but the result is similar.
Does it mean that the motor bearing is almost died so that it draws more current then normal?
Sorry guys,
![Offtopic](https://5series.net/forums/images/smilies/imported/offtopic.gif)
Power = current x voltage
56 = current x 220v
current = 0.255A
I don't know why you can measure the current? Since it need to connect in series with the motor or diver parts.
Does it mean that the motor bearing is almost died so that it draws more current then normal? Refill some lubricant may help but better throw away for any doubt. They are just few hundred dollars and not worth to repair anymore.
I found the Dyson copycat at taobao just less than HK$ 200.
![Wacko](https://5series.net/forums/images/smilies/imported/wacko.gif)
![Laughing](https://5series.net/forums/images/smilies/imported/laughing.gif)
http://item.taobao.com/item.htm?id=14389378901
![Default](https://5series.net/forums/images/icons/icon1.gif)
I got an electric fan which is rated 56W, so the working current should be about 0.25A at full load (max speed), right? Correct!
Power = current x voltage
56 = current x 220v
current = 0.255A
I don't know why you can measure the current? Since it need to connect in series with the motor or diver parts.
Does it mean that the motor bearing is almost died so that it draws more current then normal? Refill some lubricant may help but better throw away for any doubt. They are just few hundred dollars and not worth to repair anymore.
I found the Dyson copycat at taobao just less than HK$ 200.
Even can use few months still not cost too much.
http://item.taobao.com/item.htm?id=14389378901
Power = current x voltage
56 = current x 220v
current = 0.255A
I don't know why you can measure the current? Since it need to connect in series with the motor or diver parts.
Does it mean that the motor bearing is almost died so that it draws more current then normal? Refill some lubricant may help but better throw away for any doubt. They are just few hundred dollars and not worth to repair anymore.
I found the Dyson copycat at taobao just less than HK$ 200.
![Wacko](https://5series.net/forums/images/smilies/imported/wacko.gif)
![Laughing](https://5series.net/forums/images/smilies/imported/laughing.gif)
http://item.taobao.com/item.htm?id=14389378901
Not a money issue to throw it away, just the desire to know and learn from Electric King
Contributors
Join Date: Sep 2007
Location: Hong Kong
Posts: 3,019
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My Ride: 530i
Mods: M5 sporty package, M5 Steering wheel, Sprint Booster
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Contributors
Join Date: Sep 2006
Location: Hong Kong
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My Ride: Mini Cooper
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Oh....really....should talk more with you tonight. Haha, I am brave on electric, I remember I disassemble the AC cassette player for investigation since 6 years old...
Is a clampmeter more safe because there is no direct contact with the current.
Attachment 133263
![Hyper](https://5series.net/forums/images/smilies/imported/hyper.gif)
Is a clampmeter more safe because there is no direct contact with the current.
Attachment 133263
![Twoup](https://5series.net/forums/images/smilies/imported/twoup.gif)