Endless Sphere

Any updates?

Wisconsin title in my name

The bike is now mostly disassembled from me taking parts off to transfer to a new build. I'm lowering the price to $300 for all of it, but I am also now parting it out. If anyone has an e-grom and wants spare parts, let me know.

Does the alternator use bearings or bushings?

Looking fantastic. Maybe a cheap Chinese BMS but instead of driving the real load, only let it drive the DC/DC and through that a high current contactor for the motor driver. That way you lose current sense from the BMS. But at least you allow the BMS to cut off the load if it needs to. Should work...

Maybe the 66t sprocket depending on the chain type.

Prices are required though: viewtopic.php?f=9&t=28651

Prices?

How does the motor look in this setup with the fan blades installed on the shell? I just pulled apart my hubmonster for ventilation and I'm trying to get an idea for fan blade spacing and how they create enough vacuum to pull air out through the holes. Also, regarding the close fitting intake cover,...

Ok haha you did your homework, nevermind. That motor is going to be a hoot.

A precharge of some sort would be a good idea at 72v, both to avoid damage to the controller and the contactor. Use ohm's law (Voltage = current x resistance) to properly size a resistor. For example, if you want to limit the precharge current to 2 amps, then a ~36 ohm resistor should be used (72v/2...

Hi all, For sale is a mostly complete chinese egrom. Not parting out yet, hoping someone will grab it for an egrom build. The bike has everything, minus the following parts: Batteries and battery box Stock controller (kinda shit anyways) There may be a couple of other things but that's most of it. T...

I would highly recommend thickening the metal on the extension where the axle is going. Better yet, thicken it and make it clamp on the axle. That motor is probably capable of at least 30kw bursts, and the torque at those levels may shred those holes. I know some qs motors come with small torque arm...

I have the keyswitch pin wired directly to B+ on the controller, just another ring terminal on top of B+. The controller turns on when the contactor closes.

The 12v system is turned on by a switch on my handlebars. Then when I turn the key switch the smart precharger prechargers the controller caps and closes the contactor automatically after they are charged. This is the website with the wiring diagram: https://www.evwest.com/catalog/product_info.php?p...

Top row in that last pic above is for the YGB set of phases. many thanks John. thats sorted another hurdle for getting my hubmonster project going! next will be figuring out how to stuff the motor into/underneath the frame i want to use, or re-fab the whole rear section.. :) If not in wheel I hope ...

In theory, it should work. Over CAN, the motors are synced with understanding that they are on different axles with ability to control traction. I think it would be best, however, to implement the exact logic that would be needed to keep two pairs of phases in a single motor in sync. You mention be...

You mention being able to connect controllers via CAN, do you think there would be any issues running a dual 3-phase/6-phase motor like a hubmonster using two controllers connected by CAN?

From what I've read, some motors' designs make field weakening less efficient than others, sometimes so much so that field weakening is not the best way to go about reaching higher speeds. It depends on the motor

Starting my own e-grom build. I'm worried about top speed not being enough to keep up with traffic as stock these things top out around 40-45mph. I note your battery voltage didn't go up that much, was the ASI controller enough to bring that top speed up into the 60-70mph range? Hey, I'm the guy fr...

You mentioned 10kW continuous, what is the peak power? The controller is rated for 340A peak, which works out to about 25kw I found your thread on ElMoto, keep in mind that peak power can't be calculated from motor current, only battery current. So your peak power would be 72V * peak battery current

You mentioned 10kW continuous, what is the peak power?

The 6.x and 5.x controllers use different chipsets, so the firmware is incompatible. Not sure about what that means for your controller though.

I'd say get some Turnigy lipo's from hobbyking

Thanks!

I found the DC/DC on eBay:
https://www.ebay.com/itm/222860367230
It's non-isolated, but hasn't given me any issues

I made a cycle analyst adapter for my egrom, bought from the same website. It's been working pretty well for me, let me know if you want the STL files for 3d printing or the original cad files.