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cpowell243 10-10-2011 09:18 PM

capacitor problem
 
I am building a halloween decoration with a dishwasher motor that requires a capacitor start. Have capacitor and motor starts running when capacitor receives current. Since item is motion-activated, I need a relay of some kind to give the capacitor a brief (about 1 sec.) 110 current, then re-open circuit since capacitor cannot be charging while motor is running. Make any sense? Th

a7ecorsair 10-11-2011 08:09 AM

Quote:

Originally Posted by cpowell243 (Post 746243)
I am building a halloween decoration with a dishwasher motor that requires a capacitor start. Have capacitor and motor starts running when capacitor receives current. Since item is motion-activated, I need a relay of some kind to give the capacitor a brief (about 1 sec.) 110 current, then re-open circuit since capacitor cannot be charging while motor is running. Make any sense? Th

No.
Without worrying about the application, does the motor run correctly? In other words, when you plug it in, the motor runs.

J. V. 10-11-2011 10:30 AM

Sure. You need to know what mfd and voltage the motor capacitor needs to be. Then you need to know how to connect it and to connect a timing device or centrifugal switch on the motor. Then the most important part. How to do this safely. Do you know how to do these things?

cpowell243 10-11-2011 08:42 PM

reply
 
in response to corsair Q - the motor runs but only after a brief manual connection from capacitor to one of the motor leads. Motor does not start when connected directly to A/C
in response to JV - your suspicions are correct - I barely know which end of a cord goes in the wall socket. However, the motor is now wired so that it will start when the capacitor is manually activated by closing the circuit (between capacitor and motor lead). Can a centrifugal switch be added to a motor - thought that was only a built-in feature? Is there such a thing as a timer that is triggered by the closing of 110 circuit?

Thank you both.

Missouri Bound 10-11-2011 09:05 PM

If you have the motor, and the capacitor, what is missing that took the capacitor out of the circuit in the first place?

cpowell243 10-11-2011 09:56 PM

reply
 
Missouri Bound,
Long story. Bought motor from appliance shop, repair guy lent me a shop tool he used to start motors, worked well all through Halloween last year, had to return the tool, found a capacitor, now have what I described.

Missouri Bound 10-11-2011 09:58 PM

Got it. Got a model number? You may be able to find some information by googling it...maybe find the proper controls to do what you want. How many wires to the motor?


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