nadogail
Well-known member
Regarding the relative efficiencies of different types of phase inverters, I am not in a position to comment with any real degree of competence.
For that reason I offer a full money back guarantee on any advice I offer. My advice is worth exactly what you pay for it. Send a self addressed stamped envelope and your full refund will be enclosed.
Rotary phase converters can be made at home from boneyard parts. I once sent someone $5 for the following information.
Basically you need to get a three phase motor that is rated at 150% of the horsepower of the three phase motor you intend to run. A little larger would not be bad.
You hook up 2 of the 240 supply leads to your Three Phase Converter, using an appropriate disconnect. For purpose of illustration we will call them the A and B leads.
That leaves you a third converter input, we will call the C lead, that will be connected to either the A or B input through a momentary contact and an appropriately sized series connected starting capacitor . The capacitor should an AC Capacitor and rated for full AC line voltage and be about 12 mfd per converter horsepower.
Converter output will be connected to the A, B, and C terminals of the phase converter, and run through a three phase disconnect to your intended load.
To start the converter, close the supply contacts and close the momentary contact. The converter should start to rotate. After about 3/4 of a second open the momentary contact and the converter will come up to speed.
After the three phase converter comes up to speed, close the output switch to your 3 phase load.
I realize that this is a third world solution and the three phase motor may not develope full facet rated horsepower, but most machining operations do not require full motor output. but if you have more time and desire than money we can learn from those less fortunate.
For that reason I offer a full money back guarantee on any advice I offer. My advice is worth exactly what you pay for it. Send a self addressed stamped envelope and your full refund will be enclosed.
Rotary phase converters can be made at home from boneyard parts. I once sent someone $5 for the following information.
Basically you need to get a three phase motor that is rated at 150% of the horsepower of the three phase motor you intend to run. A little larger would not be bad.
You hook up 2 of the 240 supply leads to your Three Phase Converter, using an appropriate disconnect. For purpose of illustration we will call them the A and B leads.
That leaves you a third converter input, we will call the C lead, that will be connected to either the A or B input through a momentary contact and an appropriately sized series connected starting capacitor . The capacitor should an AC Capacitor and rated for full AC line voltage and be about 12 mfd per converter horsepower.
Converter output will be connected to the A, B, and C terminals of the phase converter, and run through a three phase disconnect to your intended load.
To start the converter, close the supply contacts and close the momentary contact. The converter should start to rotate. After about 3/4 of a second open the momentary contact and the converter will come up to speed.
After the three phase converter comes up to speed, close the output switch to your 3 phase load.
I realize that this is a third world solution and the three phase motor may not develope full facet rated horsepower, but most machining operations do not require full motor output. but if you have more time and desire than money we can learn from those less fortunate.
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