90 volt DC motor plug... What wire goes to

anvilring

anvilring

Joined
Nov 29, 2000
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the broad (widest) plug prong?? Ya know... one plug "prong" is wider than the other one so does it get the hot (white) wire or the black (neutral) one?? Or, does it make any difference at all?? In 90v (110 that is...) This motor of course has a Minerik VFD running it.

regards, mitch
 
are you using a GFI plug? (3 prong)

hopefully you are....:(
 
were there instructions with the plug end?

What color are the screws? I think silver gets the white cord.
 
Generally it's white wire to silver screw, black wire to gold screw, and green wire to green screw(ground). The wider blade on the plug is nothing more than polarity.........which in most areas is a "code" thing that means they can charge you more for the plug. :D
 
You say it is a 90 v DC motor with a variable frequency drive. The two don't go. White to silver and black to gold is household AC wiring. Find out what you have before you smoke it.

RL
 
it's a 90v dc Lesson motor wired into a Minirik VFD that in turn is "plugged" into a 110v socket in the wall.... that's what I was wondering about wireing. My problem is the motor seems to have no power at all really; easily stopped when grinding. The VFD is new. The motor "pulses" a lot and I'm told I should adjust the "IRQ" pot. Haven't tried that yet and I'm cooking homemade pizza for my girlfriend's family tonight so I'll not be in the shop for a few hours! I'm on the lookout for a 2hp dc motor with at least 2800 rpm used of course if you know of one...

regards, mitch
 
VFD = variable frequency drive, for AC motors.

Chances are you have a variable speed drive/controller.

Surplus Center sells 2 HP DC motors, but you can't run 2 HP on 110V. You'll need a 220V controller.
 
If it is true that your controller (the drive) is a VFD (variable frequency drive) I am suprised the motor is still functional. A VFD is for AC motor use. You will need to varify that your drive is indeed a VFD and if so either replace the drive with an appropriate DC drive or replace the motor with an appropriate AC motor. If replacing the drive match the drive HP to the motor. or get an AC motor matched to the VFD HP.

For the AC outlet (I presume it is 115 volt operation): white to silver lug or screw, black to gold or dark, green to center or green. The black input wire is for AC potential (many call that 'HOT'), the white is return/neutral and the green is earth ground (the green is attached to any enclosure material that may be contacted by the operator - you. As with water, electricity seeks the path of least resistance. With the earth ground attached to any conductive enclosure you may come in contact with a greater percentage of current will flow to ground instead of through you should a short to encloser occur.

RL
 
it's a speed controler not a VFD I guess. I just thought they were all called that. I've got it working ok for now but I need a 1.5 or 2 horse DC motor....

thanks, mitch
 
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