Conference 44.392::eng_in_miniature

    Does anyone have a good (cheap) source of capacitors to use in the 
    circuit shown in .20.
    
    Also will .20 work for a delta wired motor?
    
    Thanks
    
    Stewart
    

    Try any electric motor shop,or an industrial supplier like Grangers.
    Motor caps are rather cheap- I think the one in my 3 phase box was $5.
    
    I have been told there are major internal differences in caps labeled as
    'start' vs those for 'run'. Apparenly using a start cap in a circuit
    for full time, not just for a few seconds of starting, will blow it. I
    guess they are made with poor insulation and thus to much internal
    resistance and they overheat.

    Take a look at http://tbr.state.tn.us/~wgray/howto/ph-conv/ph-conv.html
    for information about phase converter circuits.  (There may already
    be a pointer to this in a previous note, I didn't check.)
    
    If you're anywhere near Clinton, Mass, go visit Clinton Electric
    Motor Repair, or some such name, at 140 Brooks St.  They have used
    3-phase motors of all sizes, from cheap to not-so-cheap depending
    on how much investment they have in them.  They'll also sell you
    capacitors.  It's a little hole-in-the-wall place, but I've found
    them to be quite good.
    
    

...and in the UK, I would probably start with Yellow Pages and "Electric Motors".

No personal experience of this, I'm afraid.

- Brian