(206) 949-5683, Top Rated Plumber, Seattle
Page 1 of 2 12 LastLast
Results 1 to 15 of 20

Thread: Blower Motor Control

  1. #1
    Retired tool & Die and Mechanic Giles's Avatar
    Join Date
    Aug 2007
    Location
    N.W. Alabama--Florence--
    Posts
    110

    Question Blower Motor Control

    Can I use a variable speed switch with this type motor?
    http://www.surpluscenter.com/item.as...tname=electric

  2. #2
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,676

    Default

    I would ask the folks at Fasco. mailto:fascohelp@RegalBeloit.com

    I have a variable speed control on my wood burning fireplace and have been trying to find one that produces less hum. It has been trial and error and my failures are now speed controls for ceiling fans.

  3. #3
    Electrical Contractor/Instructor jwelectric's Avatar
    Join Date
    Jun 2007
    Location
    North Carolina
    Posts
    2,523

    Default

    Quote Originally Posted by Giles View Post
    Can I use a variable speed switch with this type motor?
    http://www.surpluscenter.com/item.as...tname=electric
    no .

  4. #4
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,642

    Default

    Quote Originally Posted by Giles View Post
    Can I use a variable speed switch with this type motor?
    http://www.surpluscenter.com/item.as...tname=electric
    What type of switch was you going to use ?

    It can be operated at a lower speed but you would have to use the correct controller.


    DonL
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  5. #5
    Electrical Contractor/Instructor jwelectric's Avatar
    Join Date
    Jun 2007
    Location
    North Carolina
    Posts
    2,523

    Default

    Quote Originally Posted by DonL View Post
    What type of switch was you going to use ?

    It can be operated at a lower speed but you would have to use the correct controller.


    DonL
    If one used the correct controller would it be a switch?
    Would it be a VFD controller?

  6. #6
    DIYer, not in the trades LLigetfa's Avatar
    Join Date
    Feb 2011
    Location
    NW Ontario, Canada
    Posts
    3,676

    Default

    There's JW taking things literal again. It must be a common OCD with teachers as I had a few teachers like that.

    All of my variable speed controllers also have a switch. Some motors are speed controlled by simple switches but I'm sure that is not what the OP had in mind.

  7. #7
    Jack of all trades DonL's Avatar
    Join Date
    Mar 2011
    Location
    Houston, TX
    Posts
    3,642

    Default

    Quote Originally Posted by jwelectric View Post
    If one used the correct controller would it be a switch?
    Would it be a VFD controller?
    That must be a trick question.

    Mostly any electronic device that controls anything electronic are an electron switch.

    That is why I ask , What type of switch. It may be a Mechanical switch.

    A lot of them blower motors can operate at different speeds just by connecting the voltage tap
    that the motors have built in.

    Restive or taped transformer can be used for a motor that requires 60 HZ. You have to control the voltage but keep the frequency at 50 - 60 or around.


    Tell me the answer JW, How would You do it ?

    The way that I would do it would depending on the application.


    But it can be done.


    DonL
    Theory only works perfect in a vacuum.

    Cyber Security Protection for Windows C:\ > WWW.WinForce.Net

  8. #8
    Electrical Contractor/Instructor jwelectric's Avatar
    Join Date
    Jun 2007
    Location
    North Carolina
    Posts
    2,523

    Default

    On an electric motor to control the speed one has to control both voltage and frequency thus no switch but a variable frequency drive is used to control the speed.

  9. #9
    General Engineering Contractor ballvalve's Avatar
    Join Date
    Dec 2009
    Location
    northfork, california
    Posts
    3,258

    Default

    You can vary the air output and reduce the amp draw by restricting the air inlet. Cardboard is cheaper than a VFD.

  10. #10
    DIY Senior Member BobL43's Avatar
    Join Date
    Mar 2011
    Location
    Long Island, NY
    Posts
    1,772

    Default

    Quote Originally Posted by ballvalve View Post
    You can vary the air output and reduce the amp draw by restricting the air inlet. Cardboard is cheaper than a VFD.
    I agree, but then you can use a linear actuator motor and its controls to operate the cardboard damper
    I am definitely not a pro plumber, but I am a pro crastinator

  11. #11
    General Engineering Contractor ballvalve's Avatar
    Join Date
    Dec 2009
    Location
    northfork, california
    Posts
    3,258

    Default

    And a VFD to control the linear actuator motor!

    JW:If one used the correct controller would it be a switch?
    Would it be a VFD controller?
    It would be a metal or cardboard restrictor. So says the smart a&% student.

    Lest anyone doubt my point, here is a Fasco rig that has ALREADY heard my idea and put it into production.

    http://www.surpluscenter.com/item.as...tname=electric

    Remember the first and second rule of design : KISS
    Last edited by ballvalve; 11-01-2011 at 01:37 AM.

  12. #12
    DIY Senior Member BobL43's Avatar
    Join Date
    Mar 2011
    Location
    Long Island, NY
    Posts
    1,772

    Default

    Quote Originally Posted by ballvalve View Post
    And a VFD to control the linear actuator motor!



    It would be a metal or cardboard restrictor. So says the smart a&% student.

    Lest anyone doubt my point, here is a Fasco rig that has ALREADY heard my idea and put it into production.

    http://www.surpluscenter.com/item.as...tname=electric

    Remember the first and second rule of design : KISS
    whoo hoo! suction throttling; no lips

    the linear actuator motors we use have digital positioning feedback to a counter module. gets interesting.
    I am definitely not a pro plumber, but I am a pro crastinator

  13. #13
    DIY Senior Member Rich B's Avatar
    Join Date
    Sep 2008
    Location
    New Jersey
    Posts
    282

    Default

    Quote Originally Posted by jwelectric View Post
    On an electric motor to control the speed one has to control both voltage and frequency thus no switch but a variable frequency drive is used to control the speed.

    I have a variable motor speed controller that I have used for 20+ years to change the speeds infinitely on a die grinder. Full speed is fine using a carbide cutter.....but switch to a paper roll with an extension and it's way to fast.....



    I will test it for you and see if your correct....I am somewhat skeptical as to the HZ being reduced with the voltage on the item I have due to it's small size....and the fact that is at least 20 years old and there are likely no "hi-tech" components in it....

    I have a Fluke meter that reads frequency.....or HZ as it is usually called these days. I use it all the time on generators.

    I'll report back tomorrow on what I see on my meter...

    The company that offered the speed controllers may not be still making them......Their business went down as almost all electric hand tools started to come with built in speed control.....Their products were advertised as being able to control speed without a loss of torque or drive power and they work very well.....I don't recall where I bought it but it might have been Grainger.....It is fused and has a rocker switch for full speed or variable and a dial for speed......It is small ...maybe twice the size of a pack of cigarettes.....I will have to look at it's current rating.....My guess is 10 @ 120volts.......I have used more than one and they were all the same in size and operation........and cost under $100.....
    Last edited by Rich B; 11-01-2011 at 04:53 PM.

  14. #14
    DIY Senior Member BobL43's Avatar
    Join Date
    Mar 2011
    Location
    Long Island, NY
    Posts
    1,772

    Default

    Quote Originally Posted by Rich B View Post
    I have a variable motor speed controller that I have used for 20+ years to change the speeds infinitely on a die grinder. Full speed is fine using a carbide cutter.....but switch to a paper roll with an extension and it's way to fast.....



    I will test it for you and see if your correct....I am somewhat skeptical as to the HZ being reduced with the voltage on the item I have due to it's small size....and the fact that is at least 20 years old and there are likely no "hi-tech" components in it....

    I have a Fluke meter that reads frequency.....or HZ as it is usually called these days. I use it all the time on generators.


    I'll report back tomorrow on what I see on my meter...

    The company that offered the speed controllers may not be still making them......Their business went down as almost all electric hand tools started to come with built in speed control.....Their products were advertised as being able to control speed without a loss of torque or drive power and they work very well.....I don't recall where I bought it but it might have been Grainger.....It is fused and has a rocker switch for full speed or variable and a dial for speed......It is small ...maybe twice the size of a pack of cigarettes.....I will have to look at it's current rating.....My guess is 10 @ 120volts.......I have used more than one and they were all the same in size and operation........and cost under $100.....
    There is more than just one type of speed controller design for AC motors. The Voltage/Frequency charactaristic is often a programmable parameter that is designed for the machine function. Years ago, the designs were more basic and brutal on motors. today, the drives and motors are designed to work well with each other and offer protection against overload damage. And then there is pulse width modulation speed control
    Last edited by BobL43; 11-01-2011 at 05:58 PM.
    I am definitely not a pro plumber, but I am a pro crastinator

  15. #15
    Electrician ActionDave's Avatar
    Join Date
    Feb 2009
    Location
    Colorado
    Posts
    326

    Default

    Quote Originally Posted by jwelectric View Post
    On an electric motor to control the speed one has to control both voltage and frequency thus no switch but a variable frequency drive is used to control the speed.
    I don't think so Tim.

Similar Threads

  1. blower motor size
    By mark floyd in forum HVAC Heating & Cooling
    Replies: 8
    Last Post: 02-03-2011, 11:32 AM
  2. Blower motor not kicking on???
    By walds11 in forum HVAC Heating & Cooling
    Replies: 10
    Last Post: 04-11-2010, 08:23 AM
  3. Control motor keeps kicking on and off
    By TXCarl in forum Pumps and Tanks Well Forum & Blog
    Replies: 1
    Last Post: 11-02-2008, 12:46 PM
  4. Replies: 0
    Last Post: 08-10-2008, 09:05 AM
  5. Is a GE 5-wire blower motor speed-controlled?
    By leejosepho in forum HVAC Heating & Cooling
    Replies: 9
    Last Post: 02-23-2007, 02:46 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •