Search found 147 matches

by kingjamez
Jan 12 2017 4:23pm
Forum: E-Bike Technical
Topic: Recommend a 48v (+) 1500W controller.
Replies: 8
Views: 866

Recommend a 48v (+) 1500W controller.

I am building a rear hub motor bike from a cheap ebay kit. I'm happy with the quality of the motor, but the controller is lacking. I'd like a controller that has the following features: 1. 1500W of continuous output. My commute has long flat stretches where I can go fast. Minimum voltage is 48V, I'd...
by kingjamez
Dec 11 2016 1:05am
Forum: Battery Technology
Topic: Time based charging / computer controlled charger?
Replies: 18
Views: 1406

Re: Time based charging / computer controlled charger?

Ok,, we never know if we are talking to a 14 year old, who shares the bedroom with a baby, and wants to charge next to the crib. No doubt you have no intentions of keeping a dinged pack in service either. That's the mistake so many newbies make. I'm not afraid at all to bulk charge, when I'm underc...
by kingjamez
Dec 10 2016 9:51pm
Forum: Battery Technology
Topic: Please delete thread
Replies: 21
Views: 1966

Re: Diy 20s 10ah graphene lipo with 80A BMS and charger $340

I bought 6 of the Turnigy Graphene 4S 10000mah packs. Of those six one had a bad cell, but Hobbyking's customer service came through and replaced the pack. I plan to build a 12S2P 48V 20000mah pack for my BBSHD and really test these packs out. I'll be comparing them with the 16000mah multistars and ...
by kingjamez
Dec 09 2016 10:30am
Forum: Battery Technology
Topic: Time based charging / computer controlled charger?
Replies: 18
Views: 1406

Re: Time based charging / computer controlled charger?

Thanks for the suggestions, I'll take a look. As to the charging at night. I charge on a concrete floor in "fireproof" ventilated bags. I've been using RC LiPo's for almost 20 years, I was one of the first to use them in RC airplanes and used to be considered and expert in their use for RC's. I've h...
by kingjamez
Dec 08 2016 2:14pm
Forum: Battery Technology
Topic: Time based charging / computer controlled charger?
Replies: 18
Views: 1406

Time based charging / computer controlled charger?

Hi, I'm nearly done building a bike that I plan to use for commuting 5 days a week. I'm using LiPoly packs and would like to treat them nicely to extend their lifespan. My goal is to hook the battery up to the charger when I return home at nigh then I want to have something smart that says something...
by kingjamez
Dec 06 2016 2:24pm
Forum: Items for Sale - Used
Topic: Luna 52V Panasonic Shark Panasonic 13.5AH - NEW.
Replies: 0
Views: 520

Luna 52V Panasonic Shark Panasonic 13.5AH - NEW.

I bought this as a kit but it doesn't fit in my frame well. I've never charged it, I did power up my BBSHD but I never rode it. It's still very close to it's original storage voltage. The original box got shaken up in shipping, but the battery and mount is in excellent condition. Here is the link fr...
by kingjamez
Dec 04 2016 8:44pm
Forum: Battery Technology
Topic: Charging 18S LIPO 3x6S serial balanced w/o disconnect them ?
Replies: 5
Views: 1066

Re: Charging 18S LIPO 3x6S serial balanced w/o disconnect th

I didn't get a chance to try it tonight... got stuck trying to figure out the connector. Hopefully, I'll do it in the morning.

-Jim
by kingjamez
Dec 04 2016 2:18pm
Forum: Battery Technology
Topic: Charging 18S LIPO 3x6S serial balanced w/o disconnect them ?
Replies: 5
Views: 1066

Re: Charging 18S LIPO 3x6S serial balanced w/o disconnect th

It looks like it should work, I'd try it on smaller lipo's first.... in fact I may beat you to it. I've got 2 isolated server power supplies that I currently use for making 24V's. If I have opportunity this afternoon, I'll try this out with some little 800mah packs to see if it works.

-Jim
by kingjamez
Dec 01 2016 11:58pm
Forum: E-Bike General Discussion
Topic: Recommend dual motors and frame setup for 80mm rims.
Replies: 5
Views: 503

Re: Recommend dual motors and frame setup for 80mm rims.

The porter should have 36 hole rims. You might build up the FR80 rims for your Iron Horse, and then use the cheaper rims for your 2wd project. Great idea! That is exactly what I'm going to do. Thank you. Ok, so if I now assume this project will have the 100mm 36 spoke Porter rims, that changes thin...
by kingjamez
Dec 01 2016 9:40pm
Forum: E-Bike General Discussion
Topic: Recommend dual motors and frame setup for 80mm rims.
Replies: 5
Views: 503

Recommend dual motors and frame setup for 80mm rims.

I have a spare set of Turnagain FR80 rims, and they just can't sit around idle. I'm going to build a new e-bike around them. My current e-bike is a BBSHD powered Iron Horse Porter (similar to a Dolomite). For this build I'm in no hurry to finish it so I'd like to have something to "tinker with". To ...
by kingjamez
Nov 28 2016 9:05am
Forum: Battery Technology
Topic: Multistar High Capacity 6S 16000mAh
Replies: 170
Views: 36151

Re: Multistar High Capacity 6S 16000mAh

These packs appear to be on sale right now for $72.00. https://hobbyking.com/en_us/multistar-h ... -pack.html


-Jim
by kingjamez
Apr 29 2009 8:01am
Forum: E-Vehicles General Discussion
Topic: Electric Reverse Trikes. Ideas, Rants, Collaboration?
Replies: 122
Views: 43343

Re: Electric Reverse Trikes. Ideas, Rants, Collaboration?

Interesting read Tom. I'd go the composite route, if I thought it would be as safe as a chromoly space frame. If we are going to be driving these things at 60mph then I want to be sure that if something (someone) goes wrong, that I've got a strong frame around me. Plus I can't get it through my head...
by kingjamez
Apr 27 2009 6:42pm
Forum: E-Vehicles General Discussion
Topic: Electric Reverse Trikes. Ideas, Rants, Collaboration?
Replies: 122
Views: 43343

Re: Electric Reverse Trikes. Ideas, Rants, Collaboration?

I found this today: www.zwheelz.com the ZW2-C is almost exactly what I've had rolling around in my head.

-Jim
by kingjamez
Apr 23 2009 6:09am
Forum: E-Vehicles General Discussion
Topic: Electric Reverse Trikes. Ideas, Rants, Collaboration?
Replies: 122
Views: 43343

Re: Electric Reverse Trikes. Ideas, Rants, Collaboration?

Very nice website! I too am wanting to build a 2 seat electric reverse trike. I really like your diesel electric hybrid, that is very similar to the design I have been working out thus far. My goal was to build an aluminum space frame and cover it like Robert Riley does. However, I found this websit...
by kingjamez
Apr 21 2009 9:29pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Motorcycle class Hub Motor
Replies: 713
Views: 112745

Re: Motorcycle class Hub Motor

Wow, those Li-FePO4 cells are getting very cheap. This project is looking better every day.

-Jim
by kingjamez
Apr 20 2009 9:04pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Motorcycle class Hub Motor
Replies: 713
Views: 112745

Re: Motorcycle class Hub Motor

So is there any possibility of mounting these in a car like vehicle? I'd really like to do something like a DIY Aptera, and these motors would work really well for a simplified build.

-Jim
by kingjamez
Apr 12 2009 3:44pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Motorcycle class Hub Motor
Replies: 713
Views: 112745

Re: Motorcycle class Hub Motor

What's the point of doing wye/delta switching on a motor that can already do 60+MPH?

-Jim
by kingjamez
Apr 05 2009 2:24pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Motorcycle class Hub Motor
Replies: 713
Views: 112745

Re: Motorcycle class Hub Motor

Having also built Hobby Brushless DC motors, I too believe that the angle of the stators on that prototype motor is off considerably. It makes zero sense to have one stator overlapping 2 others! If it the video has a stator like that one, then we're going to have one high performance motor once the ...
by kingjamez
Apr 02 2009 4:38pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Motorcycle class Hub Motor
Replies: 713
Views: 112745

Re: Motorcycle class Hub Motor

John, You'll be FAR better off going with 2 controllers. 2 Brushless (sensorless I presume) DC motors are near impossible to run off of one controller. The timing of the advancing field is not likely to be the same for each motor and the differing back emf's will just confuse the controller. Mark, a...
by kingjamez
Mar 24 2009 2:27pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Motorcycle class Hub Motor
Replies: 713
Views: 112745

Re: Motorcycle class Hub Motor

Ouch. I've wound my fair share of motors and it HURTS after pulling all that wire. I wound a motor 1/100th the size of this one and hated it. I can't imagine handwinding that thing.

That said, I'm glad they do it, I want one!

-Jim
by kingjamez
Mar 23 2009 7:53pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Motorcycle class Hub Motor
Replies: 713
Views: 112745

Re: Motorcycle class Hub Motor

I would love to see the winding machine that can wind that stator. That's VERY impressive!

-Jim
by kingjamez
Mar 22 2009 9:52pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Motorcycle class Hub Motor
Replies: 713
Views: 112745

Re: Motorcycle class Hub Motor

Just wanted to put my name in as someone who will likely buy one of these motors. If it can do 50+MPH on an average "crotch rocket" and the price is reasonable, I'll certainly buy at least one.