why is a neu better than a feigao?

[_paralyzed_]

simply, a neu is more efficient. But why?

don't give me the "4 pole" answer, I know that, so let's then compare a lehner and a feigao.

Both are basically the same. Winds in the can, a rotor with magnets in the middle. And feigaos actually perform well if you follow all the rules.

So, technically, what makes a good motor better?

[BrianG]

Efficiency, which is the result of better materials, construction techniques, etc. And even a couple percentage points in efficiency can make a huge difference in motor temperatures at the power levels we run.

[brushlessboy16]

Castle creations explains it well

The efficiency of a motor determines its quality. Higher efficiency means better design and high quality components. The higher the efficiency of the motor the more power it can produce before it overheats. Here’s a little math, we promise it won’t hurt. Say you are laying down 1,000 watts, (about 1 ¼ horsepower), and your motor is 70% efficient. That means you are turning 300 watts into heat. Ever grab a 300 watt light bulb? If the motor is 85% efficient it only burns 150 watts as heat. More power goes to the wheels and the motor runs cooler and able to put out even more power when needed.

Mamba Monster systems typically pull 4,000-5,000 watts (5 to 6 horsepower) under acceleration. The Neu-Castle motors are some of the highest efficiency motors that we have ever tested; they are up to 85%+ efficient on our test rig. The more common Asian motors tend to show in the mid to high 70’s. At those power levels, one single point equals about 50 watts of heat! You know that soldering iron on your workbench? It’s maxed out at 50 watts. That’s a lot of heat; now consider wasting several times that much heat inside your vehicle. Neu-Castle motors can therefore put out significantly more power for longer periods than less efficient motors. Go ahead, run the motor you have on the shelf, we have a feeling you will find its heat limits quickly.

It’s always better to reduce the heat generated in an electric power system is by better engineering than to try and cool things with fans and other gimmicks. Sure, a fan can get you a few degrees, but it is much better to have a superior design to begin with.

[_paralyzed_]

thanks guys. can anyone elaborate on the construction techniques?

[magman]

It costs more so therefore it MUST be better

[lincpimp]

Neu is better cause it costs more, DUH!!!

You're just mad cause I have been chatting with hot babes on the internet all day!

[lincpimp]

Originally Posted by _paralyzed_

thanks guys. can anyone elaborate on the construction techniques?

Well, neu uses higher quality laminations, as well as better magnets. Plus the neu design just seems to be superior for the applications we use. I have owned the best 2 pole motors (hacker c50 and lehner) and the added torque that the 4 pole makes along with the larger diameter rotor seems to be the ticket for the various rpm load demands we place on the motor.

Properly cooled the feigao seems to be decent, but with the cc neu motors you really can get a good deal on a well built 4 pole motor. Not sure if the cc neu is as good as the reg neu, but it is close.

[_paralyzed_]

makes sense. I learn so much here.

[magman]

Originally Posted by lincpimp

You're just mad cause I have been chatting with hot babes on the internet all day!

Yes, Yes I am!

[lincpimp]

Originally Posted by _paralyzed_

makes sense. I learn so much here.

Just about everythig I know about rc has come from here and experimenting. This really is a great forum!

Originally Posted by magman

Yes, Yes I am!

Thought so. Don't be mad, I told them that you and your "partner" would be happy to go shopping with them!

[zeropointbug]

Just to elaborate on the laminations a bit more... the laminations play a large role in the efficiency of there small motors because when you have a magnetic field at a decent frequency on a piece of iron, it will heat up, it heats up because it causes 'micro turbulence's' within the field and causes little whirls of current, or 'Eddy currents', these currents are basically micro shorts, which are doing NO work, and making only heat as the biproduct (also affects magnetic strength a small amount). The higher frequency you go, the more heat is created in this manner, basically a linear curve, that's why when you add enough cells to a setup the rpm's increase, and this causes lot's of heat buildup, in particular a feaiaiago motor is cursed with this symptom. This happens because iron is conductive... NOW, if we were to make very thin sections of this iron and electrically insulate each lamination with a resin/bonding agent, then the Eddy currents are much smaller, and thus less heat is created, and less energy wasted equals more energy to make motive power, hence a more efficient motor.

Just plain tolerances/quality control make a better, more efficient motor as well, which the feiaiaiaieiegao's are missing.

Shouldn't there be a sticky post on this kind of stuff here? This is RCM!

[brushlessboy16]

So if you were to use very small guage winds wire for windings the motor would become more efficient compared to the same motor with larger guage winds?

[_paralyzed_]

thanks zeropointbug, that's more of what I was looking for

Originally Posted by lincpimp

Just about everythig I know about rc has come from here and experimenting. This really is a great forum!

i thought you only "experimented in college", I knew you were still curious!

[lincpimp]

Originally Posted by _paralyzed_

i thought you only "experimented in college", I knew you were still curious!

Yeah, still curious, but not bi-curious like you Harold... I still to women, singles or multiples if at all possible. I even try to make sure the camera-person is female, but that is not always possible.

[aqwut]

also if you look at the inside can/windings of the higher quality motors.. You will notice that the windings are "tight" and "even".. Whereas if you were to look inside a cheap motor, you would find all kinds of spaces/gaps.. and after a while.. lots of corrosion on the windings itself... Some of the KB45 windings are just plain awful.. and some are good. The worst one I've seen had a gap where my pinky would fit into it, can't beleive it still ran ok...