All About Circuits Forum  

Go Back   All About Circuits Forum > Electronics Forums > The Projects Forum

Notices

The Projects Forum Working on an electronics project and would like some suggestions, help or critiques? If you would like to comment or assist others with their projects, this is the place to do it.

Reply   Post New Thread
 
Thread Tools Display Modes
  #1  
Old 07-19-2010, 05:33 PM
Dabu13 Dabu13 is offline
New Member
 
Join Date: Jul 2010
Posts: 1
Default Permanent Split Capacitor (PSC) Motor Modified for Speed Control?

I am trying to mod. a permanent split-capacitor motor so I can have variable speed control. my friend suggested that I could probably try using a junction box and PWM light-dimmer switch, but I don't really know how the motor would like that. This is a 3.5 Amp rated motor used in a squirrel cage type blower. I know that there are specialized Variable Frequency Drives used in HVAC, but don't want to spend that kind of money. Does anyone know of a way I can add a cheap (less than $30 USD) control system? If i could get two or even three speed settings I would be golden.
Reply With Quote
  #2  
Old 09-16-2010, 04:55 AM
Patman Patman is offline
New Member
 
Join Date: Sep 2010
Posts: 4
Default

I'd love to find a solution to this problem, I'm restoring a 20-year old Bodine Electric PSC motor for use on a vibraphone, to which I don't have the controller circuit. I need to rebuild it, speed control and all. Huh boy...

Please help us, anybody?
Reply With Quote
  #3  
Old 09-16-2010, 06:42 PM
Dyslexicbloke Dyslexicbloke is offline
Senior Member
 
Join Date: Sep 2010
Location: Cheddleton, Staffordshire
Posts: 352
Send a message via Skype™ to Dyslexicbloke
Default

With a PSC blower you can just drop the voltage, autotransformers and variacs are comonplace in older HVAC installations. You can still get the 3 speed autotransformer type new.

Given that your current is so low a speed control board , 0-10V input typically, would not cost too much and would be doing the same jod as a high current dimmer board, which would probably be even cheaper.
(I think velleman do a kit, but you'd have to check the specs.)
Al
__________________
What I THINK I know is based on years of playing .. not academic education
Feel free to tell me when Im wrong, I may get it right one day
Reply With Quote
  #4  
Old 09-17-2010, 01:12 AM
marshallf3's Avatar
marshallf3 marshallf3 is offline
Senior Member
 
Join Date: Jul 2010
Location: Oklahoma City, OK. Large enough to be modern but plenty of country left around it.
Posts: 2,358
Default

Quote:
Originally Posted by Dyslexicbloke View Post
With a PSC blower you can just drop the voltage, autotransformers and variacs are comonplace in older HVAC installations. You can still get the 3 speed autotransformer type new.

Given that your current is so low a speed control board , 0-10V input typically, would not cost too much and would be doing the same jod as a high current dimmer board, which would probably be even cheaper.
(I think velleman do a kit, but you'd have to check the specs.)
Al
Whatever you use, if it's a light dimmer type circuit be sure it's rated for inductive loads such as fan motors.
__________________
-
The very first course in engineering school should be how to use Google and Wikipedia
-
I very often misspell or miss things while making posts so come back and double check a few times.
I also have a full time job and often 10 projects going on at the same time so I'm not always online.
Reply With Quote
  #5  
Old 09-18-2010, 11:58 AM
Dyslexicbloke Dyslexicbloke is offline
Senior Member
 
Join Date: Sep 2010
Location: Cheddleton, Staffordshire
Posts: 352
Send a message via Skype™ to Dyslexicbloke
Default

Good point ..... Sorry, I should have specified what specs.
__________________
What I THINK I know is based on years of playing .. not academic education
Feel free to tell me when Im wrong, I may get it right one day
Reply With Quote
Reply   Post New Thread

Tags
, , , , , , , , , ,


Similar Threads
Thread Thread Starter Forum Replies Last Post
permanent split capacitor/motor the brain General Electronics Chat 0 06-20-2009 02:57 PM
Need help for a dawn/dusk LED circuit malaybiswas The Projects Forum 24 03-04-2009 04:19 PM

Thread Tools
Display Modes

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

Forum Jump


All times are GMT. The time now is 06:48 AM.


User-posted content, unless source quoted, is licensed under a Creative Commons Public Domain License.
Powered by vBulletin
Copyright ©2000 - 2014, vBulletin Solutions, Inc.