Three phase converter or new motors

A

AC\DC

Senior Member
Location
Florence,Oregon,Lane
Occupation
EC
I done several motors with phase converter and I have a situation where it might be a option or maybe a VFD customer told me it was a 240 V motor but then I went to hook it up and I thought it was three phase - they put wrong nema cord on it ……I gotta take a five horse two horse and three horse motor and either replace them with 240 V single phase or a rotary space converter or possibly a VFD. What’s the best option for that?
 
Yaskawa dealer here: Go with a drive for the conversion. Use line reactors and upsize the drive when converting single phase to three phase. Go to the next highest HP rating in Amps.
 
yes. You need three VFDs. I can size them for you and get you the part numbers, order them for you if you want. Drop ship them to you.
 
Replacing the motors with single phase would be my first choice. Motors that size won't be hard to find. Sure drives will work, but you have to order them, find a place to mount them, wire them, program them, none of which is hard. It's just not any easier than swapping the motor.
 
I’ll ask him that—— I don’t know it’s for wood working equipment and it was pulled from his shop- it use to be just full throttle- I see no reason why it would need to be ramped down.
 
A rotary converter and a 3Φ loadcenter may be beneficial if he has more small equipment to import from the shop, or exchange for different equipment in the future. You may find a decent used one in your area.
 
If I replace the motor the Rpm’s I should match the motor from reading I should take to the next size up so the 5hp do a 7.5 or does it not matter——

Cost of motor and vfd is same so rather just have one less part to go bad
 
Seems for the cost 500-800 motors better option one less thing to go bad—-

Were the best site to buy Baldor motors online- my supply house is going to stick me



Thank you guys very much
 
GALCO is pretty good. Drives get cheaper every day. The GA series from Yaskawa are really competitive. Automation Direct has some Chinese drives that seem to work well. They sell the "Iron Horse" brand motor as well.
 
I like freq drives, I just wish the programming manuals were better. I was at a live chicken shipping facility this week, both of their pressure washers were down, found the high leg was burnt at the motor pecker head. They think they got struck by lightning. They had just put new starters on both of them. They say they have lightning run along the conduits in the shop all the time. I ordered a SPD, and will look over everything next week when I go back. Building is wood with metal roof and siding. Two grain bins next door on a different service, but they say they never have problems there.
 
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