Endless Sphere

Most with fried hall sensors or mangled phases

Sounds like a lack of adequate torque-arms by the customer...

I have had some success with sensorless controllers, just need three fat motor phase wires. Just a thought...

Not useful for ebikes, E-moto or EV cars, but...for grid storage?...this is sounding like the future, by a large margin. There are now solar panels that emphasize electrical generation in the UV range, so they can harvest energy even on a cloudy day. Unusually affordable, and incredibly long-lasting...

The title says it all. The link indicates they are sold at Lowes hardware stores. The EGO brand cordless tools advertise themselves as 56V and they are definitely 14S of Lithium 18650 cells. If the posted numbers are accurate, the battery is approximately 26-Ah (the link posted below lists it at 30-...

This one? (N19BW)

SHUTTLE SERVICE https://www.interbike.com/hotel_travel/shuttle-schedule/ Interbike offers a variety of complimentary shuttle service options for our attendees. Shuttles will be running on a continuous loop to and from hotels at the below times. Shuttles from hotels to Convention Center Route 1 – GS...

Hello, lesh. Whether you are reading about RC motors and controller, or hubmotors...don't believe the advertised power levels. One issue with RC motors is that...in their designed uses, they accelerate fast under a light load. Using them on an ebike can easily burn out the expensive ESC Hubmotors re...

I have been searching for details, simply because this has interested me for a long time. I found one small obscure reference to the auxiliary engine being a gas turbine. It is definitely small, and aircraft designers are very familiar with centrifugal-compressor "Auxiliary Power Unit" (APU). It has...

What I most need is a list of hotels within walking distance of the convention center. I suspect that there will be a shuttle bus running between the convention center and Northstar Resort, but...I haven't been able to verify that yet...

Sacko, did you buy the kit from me?

"Very good magnet bonding epoxy" (bigmoose, Doctorbass)
viewtopic.php?t=27270

If someone is curious about these, but are hesitant to purchase a full kit before you can test them in your application, I have some I can send anyone here for free to test. Just pay shipping. Four cell pairs can provide 12V, and that should be enough to test this style.

"Very good magnet bonding epoxy" (bigmoose, Doctorbass)
viewtopic.php?t=27270

Whether we are talking about Europe or the USA, it appears the most dynamic and "fun" developments are happening in the off-road arena...

Those TA's may not be pretty, but...you have two of them, and they look STRONG!

I approve...

When you have spare time, just start watching the Telenovelas (TV novels, soap operas)...

https://www.youtube.com/watch?v=ULoo3LsOgqg

https://spectrum.ieee.org/aerospace/aviation/zunum-aeros-hybrid-electric-airplane-aims-to-rejuvenate-regional-travel https://zunum.aero/technology/ ...Our series hybrid powertrain was designed for an eventual transition to fully electric, without requiring any mechanical retrofitting. Designing wit...

Just to be clear, I DO recommend using a BMS, and pay extra for a good one. If you charge to 4.0V per cell, then most BMS's will not balance them. However, you can do a full 4.2V balance charge once a week when you are at home and awake, that way you can catch any issues before it becomes a fire.

Sounds like oxidation on the connectors. Just plugging and unplugging them a few times will scrape the pins down to clean metal...

The three phrases I was told to learn when I was in the Navy and we were approaching a foreign country. Donde esta el bano? Yo quiero dos cervezas, por favor. Perdone me, solo entiendo un poco de espanol. (where is the restroom, I'd like two beers please, pardon me but I only speak a little Spanish)

I have read about quite a few battery builders who have run a pack with no BMS. It is vital to use cells from a respected name-brand manufacturer who is known for a consistent product (Samsung, Panasonic, Sony, LG, etc). Then, only charge to 4.0V per cell, instead of 4.2V. Limiting your top charge t...

The biggest benefit of a mid drive is the ability to shift gears that the motor is using, when you are climbing a steep hill. On flat land, the ability to have 3 gears means you can get "adequate" performance from a smaller and lighter motor. There are many scenarios where a hubmotor is a good choice.

I see QS motors with fried stators on a regular basis, so...this is a very good deal. What city and country are you in?

It's true I was drunk when I wrote that, but...when you have a few moments to spare, this might be interesting: "Lebowski DIY triple-stator dual-rotor axial-flux motor" https://endless-sphere.com/forums/viewtopic.php?f=30&t=46476 I't's not the "biggest" axial flux (designed to be 1,000W?), but the d...

beefcake_groundPidgeon...that Motor PDF is is good read. I noticed an interesting link in the index of references... Endless Sphere: Electric Vehicle Technology Forums 2009. Mounting Hall sensors to R/C brushless motors. Available from: <http://endless-sphere.com/forums/viewtopic. php?f=28&t=9061>. ...

An axial flux should be the first configuration that should be considered when pondering a motor design where size is a concern. It provides the maximum copper and steel-lam density per motor volume. That being said...in any application where there is a little room to play with, a radial-flux has a ...