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#129373 - 02/09/05 08:27 PM Need Help with a 1ph 1 speed motor  
Pegitt  Offline
Junior Member
Joined: Feb 2005
Posts: 1
I have a Hydro-Air HA 430 single phase 1hp motor and would like to change it to 2 speed,
is there a way to run it at a slower speed as i need to run it as a circulation pump but when i flick a switch it comes on to full power.

How do i go about doing this?

Specs

Motor

Ip-X5 220/240v 50-hz AC-1

Amps 5.2 Watts 1000

H(max) 16 m3/h 23

Capacitor

WB40200 MK SH

20uf +- 5% PO

AC400v B
AC450v C

40/085/21

50=60Hz

Any advice appreciated.

Pegitt


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#129374 - 02/10/05 01:29 PM Re: Need Help with a 1ph 1 speed motor  
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
A single speed capacitor start motor can not be "speed controlled".

Well, okay maybe in some very rare cases, but only if the low speed is still fast enough to operate the centrifugal cutout switch or some other means of removing the capacitor is provided.


#129375 - 02/16/05 10:19 AM Re: Need Help with a 1ph 1 speed motor  
Trumpy  Offline


Member
Joined: Jul 2002
Posts: 8,223
SI,New Zealand
JBD,
I agree with you mate. [Linked Image]
A Cap Start Motor needs to run up to 75% of Full Load Speed to open the C/Switch.
If it doesn't, the start winding will burn out.



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