Gallery, Projects and General > How do I??

Coolant pump alternative?

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Pete.:
415v motors run just fine on 240v if they are lightly loaded (which a suds pump is).

I pulled one from an automatic barrier closer that was 415v wired with two separate capacitors for up and down and running off 240v single phase which has years of use on it. The barrier was nearly perfectly balanced so th emotor just turned a screw to operate it up and down.

Stick a capacitor on it and try it. It's not a kludge - it's exactly how rotary phase converters work.

3 phase suds pump on single phase with capacitor

AdeV:

--- Quote --- it's exactly how rotary phase converters work.
--- End quote ---

:scratch: Don't you mean a static phase converter?

I thought a rotary phase converter was a 240v motor close-coupled with a 415v 3ph alternator.

PekkaNF:
In it's most basic form Pete is right. In practical circuits three phase rotary converters (idler motor) have some additional capcitors and circuit, something like this:
http://www.waterfront-woods.com/graphics/rotaryconverter.gif

Pekka

graham:
I use a 240 volt central heating pump on my Harrison L6 been on 10 years, works a treat.  :clap:

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