[aotsukisho]

I have kept kind of quiet about the in-progress electric motor article I have mentioned here and there, but it has finally reached a point where I think it would be good to crowdsource suggestions and have more sets of eyes to critique my admittedly long-winded technical style (and of course fact-check me).

I am going for a technical guide for those experienced in working with them but interested in how and why they behave the way they do. After this is completed I am thinking of doing a simpler layman's guide for those uninterested in electrical theory but still want to know what effect different adjustments will have.

https://docs.google.com/document/d/1nLFCnwCfKcBs6AK8YB4Ax2R0kTGSdlkhRb8BFN5XZzI/edit?usp=sharing

Keep in mind this is still pre-alpha, I am still working on adding more information and there are no photos yet. I intend to take all of my own photos and draw my own diagrams for this article in the future, but if anyone is willing to submit their personal pics under Creative Commons Attribution-ShareAlike licensing I will be happy to take submissions and will use them in the article should they fulfill my requirements.

Thanks for the read.

 

[Guges Mk3]

Wow...this is like a read from my old days on local Airsoft Forums.

Unlike now days with Kids and their superficial reasoning on what is bestest, just because I read it some where or someone told me...very nice beginning.

One thing you may mention that will take you into the weeds a bit more is the Magnet Strength. Example NEO Magnet motors have varying magnet strength. Tienly uses N52 to N28 for their motors between 25K-45K. Their 50K is a Ferrite though...

 

[Lefse]

That's interesting, I guess neo magnets would make it difficult to reach such high RPM without getting too high power consumption?

 

[aotsukisho]

One thing you may mention that will take you into the weeds a bit more is the Magnet Strength. Example NEO Magnet motors have varying magnet strength. Tienly uses N52 to N28 for their motors between 25K-45K. Their 50K is a Ferrite though...

Yes that is good, I will expand on that in the stator/magnets section. I do not know too much off the top of my head so I will have to research further, I prefer not replacing magnets in motor cans as in my experience higher quality magnets tend to come in higher quality cans.

That's interesting, I guess neo magnets would make it difficult to reach such high RPM without getting too high power consumption?

Maximum RPM is inversely proportional to magnetic field strength. Usually this is controlled by turn count, as lower turns = lower inductance/electromagnetic field. A lot easier than manipulating the exact flux of your magnets. Lower turn count can also use thicker wire to fill the available wind space on the armature cure, which has the side effect of having higher operating current due to decreased resistance.

I've worked with 130 size motors with hot winds leading to 20+A stall current

I've also worked with 540 size motors with high turn count meaning only 2.5A stall current

 

[cetane]

Just something to add, I believe the airsoft motor size is 480

 

[aotsukisho]

Just something to add, I believe the airsoft motor size is 480

I will look into that, last I checked Mabuchi does not advertise a motor can specifically for AEGs and I've only recently gotten Marui motors but there does not appear to be identifying information or stamping on them. 480 size brushless motors are used on a size class of RC helicopter, but I am not aware of any 480 flat-can brushed motors.

Also, someone left a bunch of comments on the article regarding grammatical improvement suggestions - I appreciate the effort but I'm not too sure how Google Docs comments work and cannot see where in the document they are trying to point to. I've only shared this link on places where I am active (here, and the Airsoft Heaven discord channel), please contact me if you were the one who contributed. Thanks

 

[cetane]

I’m just going on my own gathered info. If you google “480 dc motor” you find boat loads of motors that could be used in aeg applications. I believe their original source was a printer or photocopier of some sort.

 

[aotsukisho]

I'm just going on my own gathered info. If you google "480 dc motor" you find boat loads of motors that could be used in aeg applications. I believe their original source was a printer or photocopier of some sort.

Yep you are right, I should not have limited my searches to Mabuchi motors.