Chief Delphi - AC motor?

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Quote:

Originally Posted by pmahoney14 (Post 1338482)

Would it be simpler to use a DC motor and convert AC to DC? I really need a motor to plug into a standard household outlet.

You could use a computer power supply to generate the 12VDC at decent enough wattage's for your application. 15lbs from a lead screw is not demanding very much.

You can use a Variable Frequency Drive and a 3 phase motor - that will do exactly what you want, including braking.

Of course, it will set you back $200 ...

Examples:

VFD

Motor

Depending on what you have available, you _could_ use a three-phase AC motor with a starter.
I'm not sure of the cost, but I'm sure there is a threshold at which the extra cost of that would outweigh the cost of the needed DC converter (Reason #1 why we don't have DC motors on our farm, only AC)... and that for 15 pounds, you are much under that threshold.

I've hiijacked a UPS as a highish-amp testing DC power supply right now. You could do something simalar: just wire into the battery of it to power a CIM, so you have a high amount of juice in reserve but it is constantly recharging- this would work if you don't need continuous use. You wouldn't need to use a UPS; a simple battery charger should work.

For control of DC you should be able to do something as simple as the pseudo H-bridge in a Spike Relay... And with two or one switch instead of relays and signals.