speed control method of pedestal fan.

Reply

  #1  
Old 06-29-14, 12:57 PM
Member
Thread Starter
Join Date: May 2014
Posts: 24
Received 0 Votes on 0 Posts
speed control method of pedestal fan.

Hi.

I see in the stores a lot of pedestal fans that have lcd screen and remote control.
They have digital timer,4 speed and the possiblity of choose the behavior of the wind(besides the 4 speed):normal wind,natural wind,and night wind.
I know that the speed of the motor on most REGULAR fans is controled by resistor or capacitors.
From my description,what can be the speed control of those pedestal fans?

I read,also,that there are method that use triac or PWM to control the speed but i don't know if it is used on pedestal fans.

Thanks in advance.
 
Sponsored Links
  #2  
Old 06-29-14, 03:16 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 53,599
Received 417 Votes on 390 Posts
Those pedestal fans use motors with multiple tapped windings. A PWM or variable speed drive will also work but is too expensive.
 
  #3  
Old 06-30-14, 07:06 AM
Member
Thread Starter
Join Date: May 2014
Posts: 24
Received 0 Votes on 0 Posts
Hi PJmax.

I have ceiling fan and it changes its speed by changing a capacitor value(a small closed box,that has inside 2 capacitor).But it is not,of course,pedestal fan and i thought that there are also pedestal fan with that method.
So,can i understand from your answer that all the pedestal fans are using only the multiple tapped winding?
I especially refer to the new pedestal fans,which came with digital remote control and several type of wind flow possibilities(as i mention before).
Here is one example of one of the pedestal fan that i refer to.
★ authentic licensed Gree FD-4001B Remote Stand Fan fourth gear head wind flatback - HeroGate.com - A Professional Taobao Agent & More.
Is it also tapped winding speed control?
Are there any characteristics that can indicate what kind of speed control the fan uses?without openning it?
 
  #4  
Old 06-30-14, 10:38 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 53,599
Received 417 Votes on 390 Posts
So,can i understand from your answer that all the pedestal fans are using only the multiple tapped winding?
No..... I can't say all pedestal fans use multitap motors. Every one I have serviced has but they also have a distinct speed selection control like low, medium, high and max.

I have seen some expensive units use variable speed DC motors with a variable speed control.

If the remote control can variably control the fan speed then it is an electronic fan speed control.
If the remote has buttons on it... low, med, hi, etc. then it's probably a multitap setup.
 
  #5  
Old 07-01-14, 05:35 AM
Member
Thread Starter
Join Date: May 2014
Posts: 24
Received 0 Votes on 0 Posts
I didn't,exactly, understand your answer.
What do you mean when you said" If the remote control can variably control the fan speed ..."you mean that the remote control have only one button for changing the speed of the motor,when each press on it,changed the motor speed?
And then you said"...then it is an electronic fan speed control."
What do you mean electronic fan speed control?
do you mean to the method that changes the frequency to the motor(inverters)?
and if the remote control have 4 button: one to each speed is it mean that it is probably multitap winding method?

For example:the pedestal fun that i mentioned before have 1 button on the fan which each press changing the speed,and another button that each press changing the behavior of the wind blow and the same idea is also on the remote control(one button for all speed+other button for changing wind pattern).
Is it mean that this fan is using pwm method,inverters?
 
  #6  
Old 07-01-14, 10:35 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 53,599
Received 417 Votes on 390 Posts
If every push of a button changes the speed then I would assume that it is multitap motor.

I have seen controls that have an up and down fan speed rocker. Hold the up button and the fan speeds up. Hold the speed down button and the fan slows down. That would be a variable control.


Are you looking for something specific ?
 
  #7  
Old 07-02-14, 06:43 AM
Member
Thread Starter
Join Date: May 2014
Posts: 24
Received 0 Votes on 0 Posts
I try to understand if the pedestal fans that come with remote control and have lcd screens are using inverters(ac drivers)to control the speed(by changing the frequency to the motor or they are the same as the regular one(mechanic ones),only that instead pressing manually(mechanicaly)on the button the electronic board changing the speed by moving the current flow to the other wind tap.(without using any triac,chopoing,pwm,etc).

You said now:
"If every push of a button changes the speed then I would assume that it is multitap motor..."

I assume you mean one button,that change all speeds.
before you said:

"If the remote has buttons on it... low, med, hi, etc. then it's probably a multitap setup."

I assume each button refer to one speed.one button to low,one button to medium,etc.
Maybe i lost something here and i am very confused.
Could you clarify this.
 

Last edited by xchcui; 07-02-14 at 09:00 AM.
  #8  
Old 07-02-14, 11:59 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 53,599
Received 417 Votes on 390 Posts
I try to understand if the pedestal fans that come with remote control and have lcd screens are using inverters(ac drivers)to control the speed
Why..... curiosity ? Trying to build your own.

I have a remote for my fan here. It has four buttons on. Max, high, med, and low. You push the button for the speed you want.

Then there is another type of remote that just has one button. You push it once and it's max, a second push is high, a third push is medium and a fourth push is low.
 
  #9  
Old 07-02-14, 12:34 PM
Member
Thread Starter
Join Date: May 2014
Posts: 24
Received 0 Votes on 0 Posts
Why..... curiosity ? Trying to build your own.
No,i,just, try to recognize the difference between them.
and multi tap motor without the ac driver(triac,pwm,choping...)seems to me more reliable.
I have a remote for my fan here. It has four buttons on. Max, high, med, and low. You push the button for the speed you want.

Then there is another type of remote that just has one button. You push it once and it's max, a second push is high, a third push is medium and a fourth push is low.
So,do them both multitap motor without ac driver(triac,pwm...)?
I mean does the press on the remote control only changing the tap(the current to the stator) as the regular fan without another process that change frequency(ac drivers...)and etc.?
 
  #10  
Old 07-06-14, 07:19 AM
Member
Thread Starter
Join Date: May 2014
Posts: 24
Received 0 Votes on 0 Posts
Hi,PJmax.

what happened?
Because i told you that i try to recognize the difference between them and not to build one ,you decided not to answer my questions.
I asked you several times the same question and you answer something else.why?
I asked you to clarify why you said that" If the remote has buttons on it... low, med, hi, etc. then it's probably a multitap setup."
and also"If every push of a button changes the speed then I would assume that it is multitap motor.."
so....???
Them both examples of multitap fans,while i asked you how to identify multi tap to ac driver ones.
Later i asked you again the same question,but you didn't answer it again.
I very apreciate the fact that you try to help,but i don't understand why there isn't any connection between my question and your answer.

Thanks
 

Last edited by xchcui; 07-06-14 at 09:31 AM.
  #11  
Old 07-07-14, 12:30 PM
Member
Thread Starter
Join Date: May 2014
Posts: 24
Received 0 Votes on 0 Posts
OK.PJmax.

The issue is not clear enough,but you,after all, answered to my main question.

Thanks.
 
  #12  
Old 07-07-14, 12:50 PM
Gunguy45's Avatar
Super Moderator
Join Date: Dec 2007
Location: USA
Posts: 21,119
Received 2 Votes on 2 Posts
Here in the US (where most members live) it was a major holiday weekend (4 days for many people) with picnics, cookouts, fireworks and family gatherings. The site was much slower than a normal weekend, so don't hold lack of response as a personal thing.
 
  #13  
Old 07-08-14, 12:19 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 53,599
Received 417 Votes on 390 Posts
Because i told you that i try to recognize the difference between them and not to build one ,you decided not to answer my questions
I respond to over a hundred questions a day. I've tried answering your questions several times but it doesn't seem like we are getting anywhere. You know the technical terms for varying motor speeds.

I read,also,that there are method that use triac or PWM to control the speed but i don't know if it is used on pedestal fans.
I have not seen any electronically controlled pedestal fans.
 
  #14  
Old 07-09-14, 07:01 AM
Member
Thread Starter
Join Date: May 2014
Posts: 24
Received 0 Votes on 0 Posts
Thank,again,for your help.
I am not angry about anyone,the opposite is true,you also helped me in the past and i appreciate any assistance.
By the way(slightly late)Happy 4th of july
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: