http://www.baldor.com/products/detail.asp?1=1&catalog=VM3539&product=AC+Motors&family=Ge neral+Purpose%7Cvw%5FACMotors%5FGeneralPurpose&winding=34WG5884&rating=40C+AMB%2DCONT
Will this motor be a good choice for my first wind turbine generator? I do not plan on rewinding the motor, mainly because I am not knowledgeable enough at this time to undertake that task. Any help /advice is appreciated. Thank you
Might be money ahead to try and find a permanent magnet motor and use it. Look up surpluscenter.com and look in electrical then dc motor.
I'm not sure of the amount of power output you might get without a rewind compared to a permanent magnet(PM) motor. I just think if you add the price of the motor, magnets and machine work (unless you can do that or know someone that could for cheap) and add them up, for the same money or probably even less you could have the same or more output from a PM motor, if you don't need more output you could buy a cheaper PM motor and save some money for wire, batteries, etc.....
I will have 4 dc servo motors of various size for sale soon, I just need to take some pic's of them and I want to post some rpm/ voltage numbers with them. I'm not looking to make alot of money on them so the price will definitely be reasonable. I was going to use them myself but I converted my 7.5 baldor since it will put out considerably more, and my wife says I'm not allowed to have more than 1 wind genny flying (we will see about that though, laughing, I am keeping one of the servo motors for a small vawt, I have 5 keeping 1) heck, may mount it on the same tower if I can find a way to. Besides they are in my way on the work bench and I got them cheap so why not help others out by selling them cheap as well. I'd like to see them all flying, it just won't be here.
not trying to change your mind, just my thoughts.[ Parent ]
that little Baldor sure would make a nice genny. you would have to make an L bracket to mount it, and also it is 1140 rpm (6 pole). my gut feeling is that those #29 skewed neo mags you can get on ebay would be just about perfect for the coil spans of that motor. the skewed mags will get rid of most or completely eliminate cogg. you will need 6 total, 3 south and 3 north. the mags are usually listed under wind generators, neo mags, or the dealer is tropical_son (i think).
with the 230/460 volt connection, you should be able to suit 12 or 24 volt batt bank charging. if you are a little daring, you can operate on the winding and bring out the star point as leads #'s 10, 11, and 12. you can then have 4 possible connections of 1 or 2 star or delta.
a 5-6 foot 3 blade, trs-7 prop would be close.
that unit is a little honey actually for a first conversion.
good luck! zubbly
Say, zubbly: What's (the right / a good) way to make the connection and bring out the leads?
- Kind of wire/insulation. - Kind of splice or solder(?) joint. (Is solder a bad idea in the hot environment of a motor?) - Insulation to add to the joint after the fact. - Tiedown lacing.
etc.
(I think this is also the general question of how to transition from the wire of windings to the wire of leads.)[ Parent ]
Cogging is about the magnets attracting the stator poles, so you have to work to pull them away, then they yank the rotor further to get near the next pole. It's like driving on a road that goes over a series of bumps or little rolling hills. Turning the shaft feels kind of like the detents on a rotary switch. Too much and it makes problems for getting the mill started: You have to have enough torque to "get the wagon up the first hill" before it spins. After it's started it keeps going, because you get enough momentum from going down one hill to get you up the next.
Solution is to skew the stator poles and/or the magnet poles so some of the magnet(s) is getting to the next pole as an equivalent amount is leaving the previous one (or variations on that theme). This "smooths out the hills" of the potential energy function. It's like driving on a flat road, or one with only very low bumps.
It's OK to have a little cogging. Mills in a battery-charging arrangement won't generate until the speed is up to "cutin", where the mill is generating the battery voltage plus the rectifier voltage drop. So if the cogging is low enough that a wind almost up to that speed will start the mill you're fine. If there's more cogging than that a rising wind will leave your mill stalled for a while when it could be generating useful power, until it gets really strong or a gust finally kicks the rotor forward enough to get things going.[ Parent ]
