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InvisibleElSeta
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Registered: 06/26/09
Posts: 127
Loc: Atlantida.
Were to get Variable Frequency Drive speed controller online?
    #12550522 - 05/12/10 06:05 PM (14 years, 8 months ago)

I have a 5.5 Amp blower for my hood and I haven't found any VFD speed controller for it. I purchased a speedster controller (Chinese) but it overheats the blower's capacitor and causes the blower to shut off after 10 minutes of running. I tried getting one from littlegreenhouse.com recommended by RR, but they don't ship international. Any idea?


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InvisibleElSeta
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Registered: 06/26/09
Posts: 127
Loc: Atlantida.
Re: Were to get Variable Frequency Drive speed controller online? [Re: ElSeta]
    #12570871 - 05/16/10 12:59 AM (14 years, 8 months ago)

Just to bumpy-update this thread, I asked to littlegreenhouse.com if those speed controllers they sell are indeed rheostats and they affirmed they are rheostats. I checked a post where RR said that rheostats are not made for AC motors, only for DC. So it's kind of confusing. Does anyone know if getting rid of the blower's capacitor would make the motor suitable for a rheostat like the speedster controller? I know it would need manual start up though. But would it damage the motor?


--------------------
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Looking for Lion's Mane and Yellow Oyster culture. Will trade for: Shiitake/King Oyster/Blue Oyster/White Beech.
Me for info.



Yes, you can see the real reality through a little window. Now, build a door.

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OfflineRogerRabbitM
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Re: Were to get Variable Frequency Drive speed controller online? [Re: ElSeta]
    #12571813 - 05/16/10 07:34 AM (14 years, 8 months ago)

They're not rheostats.  It's common for sales people to not understand the difference.  They're garden and greenhouse people, not electricians.

Search for 'motor speed controllers' online and look for one that can handle the amperage of your motor.  You should be able to find one in your area.  If not, simply block part of the intake off with cardboard to accomplish nearly the same thing.

Never try to run a motor designed to operate with a capacitor without it.
RR


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OfflineCloneufc
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Re: Were to get Variable Frequency Drive speed controller online? [Re: RogerRabbit]
    #12571917 - 05/16/10 08:21 AM (14 years, 8 months ago)

That speedster controller you posted will work fine. You just want to make sure whatever your using can handle the amperage of the motor. A dimmer switch cant do that and will eventually overheat and melt.

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InvisibleElSeta
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Registered: 06/26/09
Posts: 127
Loc: Atlantida.
Re: Were to get Variable Frequency Drive speed controller online? [Re: Cloneufc]
    #12572305 - 05/16/10 10:32 AM (14 years, 8 months ago)

So you mean the speedster is not a rheostat? would it be, or work as a variable frequency controller that reduces it's supply of voltage instead of a simple variable resister that reduces current voltage?
speedster data link

BTW covering the intake of the blower won't work for me because it's a loud noisy one, with the controller I won't have neighbors complaining.


--------------------
-  -  -  -  -  -  -  -  -  -  -  -  -
Looking for Lion's Mane and Yellow Oyster culture. Will trade for: Shiitake/King Oyster/Blue Oyster/White Beech.
Me for info.



Yes, you can see the real reality through a little window. Now, build a door.

Edited by ElSeta (05/16/10 10:44 AM)

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