Search found 38 matches

by John500
May 21 2010 2:28am
Forum: E-Bike General Discussion
Topic: Suppliers that sit on your orders
Replies: 6
Views: 586

Re: Suppliers that sit on your orders

@Kingfish: You had me laughing half way thru, and practically rolling on the floor by the end of it. It is all too true, though like dogman I also remember the two or three month long wait to get anything. By the time it arrived it was like getting unexpected presents, because I'd always forgotten ...
by John500
May 11 2010 12:14am
Forum: E-Bike Reviews & Testing
Topic: BMSBattery/ECityPower Experience
Replies: 391
Views: 17874

Re: BMSBattery/ECityPower Experience

Without a BMS, how will you monitor and balance that battery? Can you get at each cell?
by John500
May 09 2010 5:38pm
Forum: Motor Technology
Topic: e-Buggy: Alternator Conversion
Replies: 145
Views: 48776

Re: e-Buggy: Alternator Conversion

At 48V, field connected to separate 12V bat, my setup draws 3.05A. Axle braked with pliers over leather glove (to protect surface) draws not more than 8A, I can't stop it no matter how hard I press. Well, it's on bare axle, 17mm, I know that torque is directly proportional to radius. I have to find...
by John500
May 09 2010 10:40am
Forum: E-Bike General Discussion
Topic: Ping BMS: One LED never comes on while charging (SOLVED)
Replies: 32
Views: 1921

Re: Ping BMS: One LED never comes on while charging (SOLVED)

Not having looked at the BMS circuit, I made the incorrect assumption that the 70mA was shunted to ground. WRONG, the current is shunted across the cell to the next, to the next etc. NOW I get it, but I have a real stupid question? Why don't we parallel charge with a 3.9V (or other precisely control...
by John500
May 08 2010 2:16pm
Forum: E-Bike General Discussion
Topic: Ping BMS: One LED never comes on while charging (SOLVED)
Replies: 32
Views: 1921

Re: Ping BMS: One LED never comes on while charging (SOLVED)

the final shunt current on that v2.5 signalab BMS is about 70mA. if there is more current than that going through your ammeter during charging it is being stored in the pack. Is this 70mA per cell or total current? I have found 3 cells .3V low so I am balancing the pack right now. Thanks; John
by John500
May 03 2010 4:00pm
Forum: E-Bike Technical
Topic: 220-250VAC outlet wiring (OT-ish)
Replies: 14
Views: 1407

Re: 220-250VAC outlet wiring (OT-ish)

[quote="liveforphysics"]Just wire it up with a leg from each hot side out of the breaker box, tie ground to the outlet ground/neutral. No need for fancy plugs. :)[/quote This the same advice as I was going to post as a specific answer to your question "if one of the hots gets to the box?", you won't...
by John500
May 01 2010 11:32pm
Forum: Motor Technology
Topic: e-Buggy: Alternator Conversion
Replies: 145
Views: 48776

Re: e-Buggy: Alternator Conversion

The stator I showed is junk and has been replaced. My camera batteries went dead so I did not get a picture of the repaired alternator, which was sitting beside it. I am just checking around for an inexpensive source of large alternators for other fellows. After I complete my current project of a co...
by John500
Apr 30 2010 2:57pm
Forum: Motor Technology
Topic: e-Buggy: Alternator Conversion
Replies: 145
Views: 48776

Re: e-Buggy: Alternator Conversion

Widodo;
I took my camera this morning, but only got one shot before the batteries were flat. Spare set of batteries were for wife's camera and did not fit.
Overall length is 46cm. Weight @ 55KGs. Sorry for the imperial tape. Could not find metric tape this morning.
by John500
Apr 28 2010 7:48pm
Forum: E-Bike Technical
Topic: Cyclone 500w + LiPo+SLA ?
Replies: 11
Views: 1661

Re: Cyclone 500w + LiPo+SLA ?

If a relay is used to connect the controller, it will only require a tiny bit of power when on. When off, no drain will happen.
by John500
Apr 28 2010 7:22pm
Forum: Motor Technology
Topic: e-Buggy: Alternator Conversion
Replies: 145
Views: 48776

Re: e-Buggy: Alternator Conversion

I wrap a rag around the fan and clamp the rag with vise grips. Then use an air impact wrench to rattle the nut off. Put a few drops of penetrating oil on the night before? NOT WD-40, real penetrating oil. 50-50 mix of Acetone and Automatic transmission fluid works better than most expensive P-oil. I...
by John500
Apr 28 2010 5:40pm
Forum: Motor Technology
Topic: e-Buggy: Alternator Conversion
Replies: 145
Views: 48776

Re: e-Buggy: Alternator Conversion

@dajsinjo: congratulation, seems the 200A controller works flawlessly, perhaps we should list down all the controller that has been proved to be working. Do you have any problem in starting it up ?, what is the lowest rotor supply for a reliable start up ? I am still waiting for 200A controller thi...
by John500
Apr 28 2010 5:33pm
Forum: Motor Technology
Topic: e-Buggy: Alternator Conversion
Replies: 145
Views: 48776

Re: e-Buggy: Alternator Conversion

That noise from your video is sooo familiar. I think you need a washer behind the fan to keep it from hitting the case?
by John500
Apr 28 2010 1:49pm
Forum: Motor Technology
Topic: e-Buggy: Alternator Conversion
Replies: 145
Views: 48776

Re: e-Buggy: Alternator Conversion

You are 100% correct. I am a newbee and as I live on a steep hill, I was interested in the max torque of a Star to get me home on my first build. I was hoping to not have to change to 20" wheels from 26" if I could figure out how to get the torque and gearing correct for my application. If there is ...
by John500
Apr 28 2010 1:42pm
Forum: E-Bike General Discussion
Topic: Manufacturers and dealers to avoid
Replies: 365
Views: 63462

Re: *** WARNING *** Hi-Power Cycles - Avoid at all costs

[quote="Electro"]I wanted to post here so that others could avoid the grief I had to go through when dealing with Hi-Power Cycles. My recommendation would be for the buyer to beware when it comes to Hi Power Cycles. When you posted this on Tuesday, I immediately phoned and emailed them, expressing i...
by John500
Apr 28 2010 1:27pm
Forum: Motor Technology
Topic: e-Buggy: Alternator Conversion
Replies: 145
Views: 48776

Re: e-Buggy: Alternator Conversion

I'm planning to wired it as Delta for bigger power I think delta gives higher rpm and less torque, power is the same IIRC Star (WYE) 1.6 X torque of Delta? Edit; I found many references by searching "delta, star, torque" Here is one; "To get a suitable gear ratio, I think you would have to either d...
by John500
Apr 26 2010 11:46pm
Forum: E-Bike General Discussion
Topic: Ping BMS: One LED never comes on while charging (SOLVED)
Replies: 32
Views: 1921

Re: Ping BMS: One LED never comes on while charging (SOLVED)

John, I am glad to hear that cycling the pack through a few charge/discharge cycles solved your problems too. I find the discussions and advice on this forum help me a lot. Even though this is not my first battery or even my first LiFePO4 pack, I still found the information in this topic relevant, ...
by John500
Apr 26 2010 10:46pm
Forum: E-Bike General Discussion
Topic: Ping BMS: One LED never comes on while charging (SOLVED)
Replies: 32
Views: 1921

Re: Ping BMS: One LED never comes on while charging (SOLVED)

Sorry for the bad choice of words. The note was to "myself" and I was not suggesting the post was without merit. It is just one I don't need to file for reference. The thought I was trying to convey is to relax and enjoy, not to worry too much on a new battery. I'm happy not to have a BMS to worry m...
by John500
Apr 26 2010 3:25pm
Forum: E-Bike General Discussion
Topic: Manufacturers and dealers to avoid
Replies: 365
Views: 63462

Re: Manufacturers to avoid

"My Paypal Account is in USD and my Bank Account is in USD but according to Paypal there was a Policy change and Revenue Canada are the ones to blame here. Seems American money being transferred across the Border has to enter as Canadian currency." This is a totally false statement. Revenue Canada h...
by John500
Apr 26 2010 2:41pm
Forum: E-Bike General Discussion
Topic: Ping BMS: One LED never comes on while charging (SOLVED)
Replies: 32
Views: 1921

Re: Ping BMS: One LED never comes on while charging (SOLVED)

I was trying to summarize this thread for my notes. I see the various points made of faulty charger, faulty BMS, low cell, lazy cell, bad cell. In the end, the solution appears to be to do nothing. There was no fault. (Note to self, forget this post) After the first use of my 20 LiFePO's (no BMS), I...
by John500
Apr 22 2010 7:23pm
Forum: E-Bike General Discussion
Topic: SMACK!! CRUNCH
Replies: 18
Views: 939

Re: SMACK!! CRUNCH

That's why the rider sometimes needs to just take the lane, rather than sit there in the blind spot. But then, I get the same thing every day at one intersection I can't eliminate from my route. I just take the lane now. Jackasses in cars sit there looking at me in my yellow coat for 90 seconds or ...
by John500
Apr 17 2010 11:30am
Forum: Motor Technology
Topic: e-Buggy: Alternator Conversion
Replies: 145
Views: 48776

Re: e-Buggy: Alternator Conversion

We used automotive alternators for years to put out 117V to run small power tools. They will produce 1Kw but they will get hot in continuous use. With additional cooling, who knows what they will live with? I'm in Vancouver for a few days next week and will look around the e-bike shops for some parts.
by John500
Apr 16 2010 12:42pm
Forum: Motor Technology
Topic: e-Buggy: Alternator Conversion
Replies: 145
Views: 48776

Re: e-Buggy: Alternator Conversion

Hi Widodo, Thanks for sharing, I've been interested in the alternator conversion because of possible power output ,simplicity , robust , and cost effective. I have lots of extra BL controller, so time for me to go to the auto wrecking and find the biggest used alternator I could find for conversion...
by John500
Apr 14 2010 10:05am
Forum: Motor Technology
Topic: e-Buggy: Alternator Conversion
Replies: 145
Views: 48776

Re: e-Buggy: Alternator Conversion

"Small in power, not in gabarites." Does "gabarites" mean physical size? A large alternator for low power?
Thanks :D
by John500
Apr 07 2010 7:35pm
Forum: E-Bike General Discussion
Topic: Epic Fail!
Replies: 29
Views: 2011

Re: Epic Fail!

Hopefully anyone attempting to mount a hubmotor can figure out how to grind off the 45* cone :roll:
by John500
Apr 07 2010 11:07am
Forum: E-Bike General Discussion
Topic: Epic Fail!
Replies: 29
Views: 2011

Re: Epic Fail!

mr.electric;
My local auto wrecker has a "help your self" drum of them.