Motor Load vs HP vs Current

Bobby Joe · 2010-07-24T16:18:14+00:00

If I have a motor that is being overloaded ~2x it's rated willdoubling the HP improve this?I have a 1/2HP Direct drive 1P, 120V, 1075RPM blower motor that isdrawing 12A while it is rated at 6.5A Full load, 9A max and onlyspinning at about 700RPM. [No load it draws 3A]The problem I was having is any time the AC kicked in I would loseconnection to the net and the power would sag. I went to the attic andmeasured the AC and found it was drawing 2x the rated current at fullload. I thought the motor was bad so I got an identical replacementbut almost exactly the same measured specs and same problem.I figured I could replace it with a 3/4 or 1HP motor and get betterresults but I'm not sure how much. I want to save power and possiblyincrease the rpm's,The main thing I would like to know is how HP, current, and load arerelated. If I double the HP I should effectively be doubling the maxload and probably the current at max load? Basically, if I have an xHP motor using a certain load and I move to y HP motor then what can Iexpect the RPM's and current to be? [simple estimates are ok. Iunderstand that it depends on a lot of factors but there should begeneral principles involved]As I said, I would like to be able to determine if a 1HP iseffectively going to allow me to increase the RPM's and reduce thecurrent[since the motor shouldn't be overloaded].Motor used, replacements,?Pid=searchBTW, what is the difference between a Y and YZ frame?Thanks for the help,Bob

Jul 24, 2010 41 Replies

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Michael A. Terrell 15 years ago

My point is that not all news readers see it as a hot link, without the http:// prefix.

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Michael A. Terrell 15 years ago

Fine. I hope that you enjoy your glass belly button.

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