Search found 16 matches

by njloof
Mar 21, 2013 9:30 am
Forum: E-Bike Technical
Topic: How to reverse brushless motor, even if it wont.
Replies: 43
Views: 11384

Re: How to reverse brushless motor, even if it wont.

Tyro65 wrote:I see that the motor I'm considering can be reversed. But what kind of switch would I need? A double-pole, double-throw switch?
Triple pole, no?
by njloof
Mar 19, 2013 7:45 pm
Forum: E-Bike Technical
Topic: How to reverse brushless motor, even if it wont.
Replies: 43
Views: 11384

Re: How to reverse brushless motor, even if it wont.

I'm trying to find out if this motor can be reversed. But to tell you the truth I don't even know if it is sensorless or has hall effect sensors. Help! http://www.czbrushlessmotors.com/750w-48v-electric-trike-conversion-kit-p-60.html Just judging by the 6 wires coming from the motor, it has Hall ef...
by njloof
Aug 20, 2012 10:34 am
Forum: Battery Technology
Topic: A123 AMP20M1HD-A Battery pack kit
Replies: 712
Views: 84710

Re: A123 AMP20M1HD-A Battery pack kit

Adding to my list of places to visit before I die :) Might want to trim back that tree branch!
by njloof
May 14, 2012 12:38 am
Forum: Large EV General Discussion
Topic: JD's VW Bus Conversion EV project (2 of 2)
Replies: 168
Views: 38618

Re: JD's VW Bus Conversion EV project (2 of 2)

Great to see those modules working well without too much hassle. What's your long term balancing/BMS plan for them?
by njloof
May 13, 2012 2:34 pm
Forum: Battery Technology
Topic: Dr.Bass Steveo found 7s3p Module! Awesome Price!!
Replies: 592
Views: 56350

Re: Group Buy? Dr.Bass Steveo found 7s3p Module! Awesome Pri

totinen wrote:Or then there should be someone checking modules prior shipment.
We agree now that this is salvage/junkyard stuff. It should be priced accordingly.
by njloof
May 07, 2012 7:59 pm
Forum: Battery Technology
Topic: Dr.Bass Steveo found 7s3p Module! Awesome Price!!
Replies: 592
Views: 56350

Re: Group Buy? Dr.Bass Steveo found 7s3p Module! Awesome Pri

deVries wrote: That one picture is very strange with all the layers of wood? :?: What was the purpose of all the layers of wood? :?: :lol:
If I recall, they used those as shims to keep the battery from sliding around inside the box (for whatever that's worth).
by njloof
May 03, 2012 3:26 pm
Forum: Battery Technology
Topic: Dr.Bass Steveo found 7s3p Module! Awesome Price!!
Replies: 592
Views: 56350

Re: Group Buy? Dr.Bass Steveo found 7s3p Module! Awesome Pri

If anyone's interested, I just received my 7s3p pack; it seems normal and tests OK on the voltmeter but I think overall it's more of a R&D effort than I'm up for to build a full size car pack. If you're in the US and want to buy it from me I'm happy to send pics; I promise to ship in a much bigger b...
by njloof
Apr 30, 2012 1:49 pm
Forum: Battery Technology
Topic: Dr.Bass Steveo found 7s3p Module! Awesome Price!!
Replies: 592
Views: 56350

Re: Group Buy? Dr.Bass Steveo found 7s3p Module! Awesome Pri

zEEz wrote:I'm putting a HUGE effort in NOT trying to order at least a single 7s3p pack to
rewire as a 18s1p for my e-pocketbike that would really shine with 20Ah and 68v. :mrgreen:
I'll let you know how it goes ;) I figure it's the best way to get to know these batteries on a small scale first.
by njloof
Apr 29, 2012 5:41 pm
Forum: Battery Technology
Topic: Dr.Bass Steveo found 7s3p Module! Awesome Price!!
Replies: 592
Views: 56350

Re: Group Buy? Dr.Bass Steveo found 7s3p Module! Awesome Pri

keno wrote: Suspect a 'Gold Rush' phenomenon will occur once the revisions are confirmed :mrgreen:
After watching "Deadwood", I wonder who really makes money in the 'Gold Rush'.
by njloof
Dec 04, 2011 1:13 am
Forum: General Discussion
Topic: Re: How to Determine the Wiring for a Brushless Motor
Replies: 11
Views: 1595

Re: How to Determine the Wiring for a Brushless Motor

That sounds much more like the process I went through.
by njloof
Oct 30, 2011 5:34 pm
Forum: General Discussion
Topic: Re: How to Determine the Wiring for a Brushless Motor
Replies: 11
Views: 1595

Re: How to Determine the Wiring for a Brushless Motor

Well, then the job was easier than I thought.

Regardless, the discussion set me on the right path, since I would otherwise have wondered why swapping the same two colored wires for motor and sensor didn't work.
by njloof
Oct 30, 2011 3:33 pm
Forum: General Discussion
Topic: Re: How to Determine the Wiring for a Brushless Motor
Replies: 11
Views: 1595

Re: How to Determine the Wiring for a Brushless Motor

Does that imply that the spreadsheet is incorrect? Your version would suggest there should be 3 valid forward-running combinations and 3 backward-running, since they are just rotations of one another.
by njloof
Oct 30, 2011 12:18 pm
Forum: General Discussion
Topic: Re: How to Determine the Wiring for a Brushless Motor
Replies: 11
Views: 1595

Re: How to Determine the Wiring for a Brushless Motor

Hrm, his original post is now missing, which doesn't help here. If you look at his truth table (attached), you see that certain motor combinations will *never* produce smooth running in either direction. "Runs good" motor wirings produce either good running or "NR" -- no rotation -- across all of th...
by njloof
Oct 30, 2011 12:08 pm
Forum: E-Bike Technical
Topic: How to reverse brushless motor, even if it wont.
Replies: 43
Views: 11384

Re: How to reverse brushless motor, even if it wont.

This thread was awesome. The spreadsheet in particular helped me find the reversal combination much faster -- if you use it as a "truth table", and cross out the rows and columns that won't get you to the right solution based on the results you get, you can reason your way to the right combination i...
by njloof
Oct 02, 2011 5:10 pm
Forum: General Discussion
Topic: Re: How to Determine the Wiring for a Brushless Motor
Replies: 11
Views: 1595

Re: How to Determine the Wiring for a Brushless Motor

My undying thanks to Fechter for his awesome post; finding it turned my Schwinn Sting-Ray Spoiler e-bike conversion from a mechanical nightmare (who the heck designs a bike with the front brake rotor on the RIGHT side?) to an easy electrical hack (flop the hub and run it backwards!) As a bonus, his ...