mabuchi 540 sf motor

[KEV THE REV]

Anyone know of the Mabuchi 540 SF motor ,I have one and it has a fan built into it - anybody else got one?

[alfagta]

hi,

they are very common , kyosho silver cans tend to be fan motors , ansmann clash and many others .

[KEV THE REV]

Thanks for the info , never noticed it before

[alfagta]

no worries, the kyosho variant always seemed faster than any other , we used to use them in the M-chassis cars as they went quite a bit quicker and cooler than the kit supplied motors ,

[Gruntfuggly]

Chuck it in the bin Kev - it's a wannabe Conrad 240826....

[KEV THE REV]

I thought I had found a vintage gem , something to exceed the Conrad !! -

[GregM]

Kev, could you please post a pic of that 540-SF motor? I found several datasheets on the web, but they all show different specs.

This list shows what motors Mabuchi has available at the time, there do not seem to be a 540-SF (anymore?):

http://www.mabuchi-motor.co.jp/en_US/product/p_0304.html

[KEV THE REV]

Hi Greg

Photos here :-

http://jpegbay.com/gallery/003931210-.html#1

The wires are not the originals

[nodtec]

Wouldn't the 'drag' of the fan, out weigh any heat/cooling advantage?

Do those clip on cooling work better?

Sorry for the pun but it does look like a 'cool' idea.

[oz-trash-cowboy]

I think the fan ( centrifugal rotor ) motor concept was born of enclosed space type installations like battery drills, polishers etc. The units ability to dump heat being hindered by insulating properties of the plastic / polymer enclosures and type of operational profile ie prolonged running ( masonary drilling etc ). Solution, increase the airflow. I guess the designers' theory of keeping the armature windings cooller, reduces the resistance ( ohm ), in turn keeps the current flowing at design spec over wider spectrum of usage. Whould i want one in a car?? Probably depends on where the "suck" was being produced, and if any dirt / grit was being blown through the motor / brushes etc. The "Clip-on" type of motor heat sink and fan cooled heat sinks do dump heat from the motor can. The heat is mostly radiated and air transfer from the armature windings. So its not the most effective / direct method. Parma had, many moons ago some ally bits to attach to the brush contractors, which were suppose to sink some heat from them, dont know if they were any good???

[Grastens]

I have a motor with a built-in fan sitting in my Striker - the motor does stay cooler, but not noticeably so. It was apparently pulled out of an HSP car, so I am unsure if it is the Mabuchi 540 SF you are referring to. The fan may have been more effective if the blades had any pitch to them to draw hot air out of the motor and out of the vent holes, but the assembly is just a paddle wheel attached to the rotor shaft.

Of course, I may not have noticed an advantage because I was driving it flat-out most of the time