Search found 2113 matches

by justin_le
Jul 30 2008 4:07pm
Forum: E-pic Topics
Topic: Cross-Canada by Ebike
Replies: 615
Views: 112577

The Batteries, LiFe

In addition to the lithium polymer pack, I've also got a prototype Lithium Iron Phosphate battery that is made up of cylindrical cells in triangular arrangement similar in layout to the triangular 36V NiCad and NiMH packs we've been getting made for the past couple years. It also fits nicely inside ...
by justin_le
Jul 30 2008 3:58pm
Forum: E-Bike Technical
Topic: Cross-Canada by Ebike
Replies: 606
Views: 133614

The Batteries, LiPoly

I wanted to be able to do about 100-120 km per charge, and with a heavy setup like this that meant at least 1.4 KWh of battery capacity, figuring about 12 Wh/km, assuming a cruising speed of some 35-40 kph. So with a 36V system that meant getting on the order of 40 amp-hours of battery capacity, and...
by justin_le
Jul 30 2008 3:58pm
Forum: E-pic Topics
Topic: Cross-Canada by Ebike
Replies: 615
Views: 112577

The Batteries, LiPoly

I wanted to be able to do about 100-120 km per charge, and with a heavy setup like this that meant at least 1.4 KWh of battery capacity, figuring about 12 Wh/km, assuming a cruising speed of some 35-40 kph. So with a 36V system that meant getting on the order of 40 amp-hours of battery capacity, and...
by justin_le
Jul 30 2008 3:32pm
Forum: E-Bike Technical
Topic: Cross-Canada by Ebike
Replies: 606
Views: 133614

The Bicycle

The bike itself is an Xtracycle conversion that has a recumbent bike seat secured to the free radical, so it rides in a semi-recumbent position with a very comfortable posture and still has most of the storage capability of an Xtracycle. In place of the regular seat tube I've stuck another set of ha...
by justin_le
Jul 30 2008 3:32pm
Forum: E-pic Topics
Topic: Cross-Canada by Ebike
Replies: 615
Views: 112577

The Bicycle

The bike itself is an Xtracycle conversion that has a recumbent bike seat secured to the free radical, so it rides in a semi-recumbent position with a very comfortable posture and still has most of the storage capability of an Xtracycle. In place of the regular seat tube I've stuck another set of ha...
by justin_le
Jul 30 2008 3:01pm
Forum: E-Bike Technical
Topic: Cross-Canada by Ebike
Replies: 606
Views: 133614

Cross-Canada by Ebike

Hey guys, as mentioned on our homepage last week I'm planning to ride an electric bicycle right across Canada from Vancouver all the way to Halifax now, about 6500+ km, and want to meet up with as many of you along the way as possible. I actually left last Tuesday for a trial run along Vancouver Isl...
by justin_le
Jul 30 2008 3:01pm
Forum: E-pic Topics
Topic: Cross-Canada by Ebike
Replies: 615
Views: 112577

Cross-Canada by Ebike

Hey guys, as mentioned on our homepage last week I'm planning to ride an electric bicycle right across Canada from Vancouver all the way to Halifax now, about 6500+ km, and want to meet up with as many of you along the way as possible. I actually left last Tuesday for a trial run along Vancouver Isl...
by justin_le
Jul 30 2008 2:47pm
Forum: E-Bike Technical
Topic: Anybody have the I/O spec for CA-DP Cycle Analyst
Replies: 18
Views: 1885

Re: Anybody have the I/O spec for CA-DP Cycle Analyst

Hi Wayne, the accuracy of the resistive shunt current sensing is quite good in most EV applications. However, in cases where it is used with a power supply that has large switching noise then this seems to get coupled to the output in the form of a DC offset, so if the CA is used for instance for mo...
by justin_le
Apr 11 2008 4:43am
Forum: Battery Technology
Topic: New 16-cell Battery Management System (BMS)
Replies: 445
Views: 86950

Re: New 16-cell Battery Management System (BMS)

I am a bit confused as to what is being deduced here. The BMS circuits that are presently on these battery packs will dissipate a small amount of current (<20mA) from the cells that have reached their full charge voltage, Actually, this is not how the clamps work, Not in a digital on-off fashion. W...
by justin_le
Apr 10 2008 6:21am
Forum: Battery Technology
Topic: New 16-cell Battery Management System (BMS)
Replies: 445
Views: 86950

Re: New 16-cell Battery Management System (BMS)

That discharge part sounds odd? Charging all cells to their maximum would seem the best approach. Discharge `balancing' is a technique used with matched, small cell-count R/C packs to try to get by without a BMS. The intent is to cause all cells to deplete simultaneously to keep from damaging them....
by justin_le
Mar 05 2008 11:15pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27181

Re: Cycle Analyst V2.1 sneak preview, and call for beta testers

Hi all everyone has been talking about linking the throttle to the CA, only the hall throttles have been mentioned, I use a 50k lin pot as my throttle, it has caused no problem with my xtlyte controller, will this pot throttle work with the CA 2.1beta? For sure. The full scale input range is 3V, an...
by justin_le
Mar 03 2008 7:53pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27181

Re: Cycle Analyst V2.1 sneak preview, and call for beta testers

I just got my Beta CA. Justin I sent you an email with a few questions. With that info I hope to be up and running soon. I don't have a good way to measure milliohms for the shunt. I was in at an electronics surplus place today and the largest shunt they had was for 30 amps. I need something that g...
by justin_le
Mar 03 2008 5:05pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27181

Re: Cycle Analyst V2.1 sneak preview, and call for beta testers

An additional idea, is it possable to run the throttle from the C.A.? That would eliminate the extra cable being run from the controller to the handlebars. Yes but with some consequences. The hall effect throttles draw about 5mA, so if you power them from the 5V bus on the CycleAnalyst that nearly ...
by justin_le
Feb 26 2008 4:58pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27181

Re: Cycle Analyst V2.1 sneak preview, and call for beta testers

Just along with the rest of use here I'd like to say thanks for your contribution to us ebikers here :) .. Hey well you guys have all made this a fun ride from my end too! I had a few question about the 10k potentometer modification. Can this be done if i'm using version 2.0? Nope, there isn't any ...
by justin_le
Feb 25 2008 11:55am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27181

Re: Cycle Analyst V2.1 sneak preview, and call for beta testers

Data logging is what I need right about now, and the speed feature would realy help as well. had you considered being able to store several speed and current profiles in the CA? I've found many instances where it would be nice to be able to change both on the fly, then change them back only minutes...
by justin_le
Feb 25 2008 11:44am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27181

Re: Cycle Analyst V2.1 sneak preview, and call for beta testers

Excellent! Now I don't have to build my own from scratch. On-the-fly current limit adjusting is a nice feature. Will it be possible to adjust the maximum current limit with a pot and use the current feedback throttle at the same time? Well Fechter, I think you have enough circuit trickery up your s...
by justin_le
Feb 25 2008 3:12am
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27181

Re: Cycle Analyst V2.1 sneak preview, the call for beta testers

I'm looking for people who want to be beta testers, and who are very explicitly interested in trying out and using either the data logging or on-the-fly speed/current limiting features above. If this is you and you already have a Cycle Analyst, then that can simply be shipped back here and I will re...
by justin_le
Feb 24 2008 11:53pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27181

Re: Cycle Analyst V2.1 sneak preview, other changes

In addition to the above things, there were some upgrades to the base code base as well: Presetting the Odometer and Lifetime Ahr Accumulator It is now possible to preload the life-cycle values into the unit, so people replacing original bicycle computers or similar devices can transfer that informa...
by justin_le
Feb 24 2008 11:47pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27181

Re: Cycle Analyst V2.1 sneak preview, On-the-fly Limit Adjustmen

The additional pad labelled 'Vi' is an auxiliary voltage input. This input can be configured to scale either the speed limit or the current limit, from 0 up to the max value that has been programmed into the CA. Aux Off.jpg Aux Amps.jpg Aux Speed.jpg One obvious use for this is to use to wire a pote...
by justin_le
Feb 24 2008 11:36pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27181

Re: Cycle Analyst V2.1 sneak preview, Serial Data Output

Serial Data Output The extra small pad labeled TX is now enabled for serial data transmission, at 9600 baud, ascii formatted, tab seperated values which look like the following: Ah V A S D 0.031 37.31 17.85 21.2 0.413 0.042 38.22 7.45 21.2 0.452 0.048 38.25 5.85 21.2 0.487 You can select whether the...
by justin_le
Feb 24 2008 11:23pm
Forum: E-Bike Reviews & Testing
Topic: Cycle Analyst V2.1 sneak preview, and call for beta testers
Replies: 63
Views: 27181

Cycle Analyst V2.1 sneak preview, and call for beta testers

So I'm pretty much ready to release a new version of the Cycle Analyst firmware, at least in a beta phase. The original plan was to incrementally add various new features over the year for V2.1, 2.2, 2.3 etc. but when I got into upgrading the code a couple weeks ago, well I couldn't stop myself unti...
by justin_le
Feb 12 2008 5:56am
Forum: E-Bike Technical
Topic: Delay of Cycle Analyst Limiting Functions
Replies: 19
Views: 2105

Re: Delay of Cycle Analyst Limiting Functions

Hey Doc, Did you look at the readings on the CA while that was happening? It sounfds like it might be something I saw as well. When there is a high diffrence in tempeture between the CA and the controller, it reads wildly. if I reset it, the readings normalize for a while, or they normalize on ther...
by justin_le
Feb 12 2008 5:44am
Forum: E-Bike Technical
Topic: Delay of Cycle Analyst Limiting Functions
Replies: 19
Views: 2105

Re: Delay of Cycle Analyst Limiting Functions

I observed that ONLY in COLD temperature outside, when i increase the throttle to run with my bike, it only respond by pulsating the power to the motor :| these pulse seems to be short and not perfectly regular.. maybe around 0.4hz maybe 100ms per pulse and that is insufisent to run my bike. After ...
by justin_le
Feb 10 2008 7:24pm
Forum: E-Bike Technical
Topic: Delay of Cycle Analyst Limiting Functions
Replies: 19
Views: 2105

Re: Delay of Cycle Analyst Limiting Functions

Is it normal that my Cycle Analyst shows that my speed and (more importantly) my amps are peaking way above the limits that I've set in the basic setup? I've read that the way it works is to just inhibit the throttle when the limits are exceeded, but it seems like there is a significant delay befor...
by justin_le
Sep 21 2007 4:20pm
Forum: E-Bike Technical
Topic: Opened My 35a controller and... SIX! x irfb4310 Fets STOCK
Replies: 38
Views: 8079

What is ABS in the circuit? It seems it could either pull-up (by R24) or pull down (by R25) as you like for the ABS!? Only one of these two res is used at one time!? Unfortunately I don't have one of these controllers physically on hand to see what components are and aren't actually soldered on the...