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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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I've just purchased a Phase a Matic static converter, which is really just
an automatic start cap set up. It has no run caps. What is the benefit of adding run caps, given that I don't plan to initially add an idler motor? My feeling is that I will shunt some current to the third leg, balancing things a bit better and gain some power from the motor, but I don't know how to quantify this. Any advice? Brian |
#2
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In article ,
Brian wrote: I've just purchased a Phase a Matic static converter, which is really just an automatic start cap set up. It has no run caps. What is the benefit of adding run caps, given that I don't plan to initially add an idler motor? My feeling is that I will shunt some current to the third leg, balancing things a bit better and gain some power from the motor, but I don't know how to quantify this. Any advice? I've never done this, but I suspect that it would add some improvement to the behavior for forward running, at the cost of making reverse operation less powerful -- though it would not add *nearly* as much benefit as you would get with a larger motor as an idler -- and it *might* confuse the Phase-O-Matic enough so that it might not start properly. At a minimum, I would consider a power-factor tuning capacitor might reduce nuisance circuit-breaker trips, if you are close to the capacity of the existing circuit breaker. Good Luck, DoN. -- Email: | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- |
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