Search found 1125 matches

by Jozzer
Oct 18 2018 5:28am
Forum: Items for Sale - New
Topic: Accelerated Systems ASI BAC 4000 & BAC 8000 FOC BT Controllers
Replies: 62
Views: 3762

Re: Accelerated Systems ASI BAC 4000 & BAC 8000 FOC BT Controllers

A note on ASI warranty - their 1 year offer starts when a DEALER buys from them, not when the dealer sells on to the end user. I know this from personal experience of trying to sell their products and not getting support for controller failures (of which there were more than one).
by Jozzer
Jun 07 2016 5:43am
Forum: Motor Technology
Topic: 75-5 & 75-7 Motors - Looking for Test Engineers
Replies: 57
Views: 6843

Re: 75-5 & 75-7 Motors - Looking for Test Engineers

My Ducati is waiting for a new motor ;) ...
by Jozzer
Dec 18 2015 6:13pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: how to program a sevcon gen4
Replies: 179
Views: 52551

Re: how to program a sevcon gen4

Good work Arlo.
Interesting you mention grounding problems resulting in encoder faults, it might explain some of the problems I've been having.
by Jozzer
Nov 10 2015 9:49am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1169
Views: 179608

Re: Compact Field Oriented Controller, ASI + Grin, limited r

Yes indeed - well worthwhile considering it turns regen braking from a bit of a gimmick to a useable brake system IMO.
With a feature like this it becomes viable to have a variable regen setup linked to the physical brakes too..
by Jozzer
Nov 07 2015 11:28am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1169
Views: 179608

Re: Compact Field Oriented Controller, ASI + Grin, limited r

Robbie here has been (somewhat recklessly I dare say!) running with only regen and no mechanical brakes on his commuter bike How does this work? I thought that the BEMF at low speed was too weak to allow enough braking torque to bring the bike to a stop. Does this controller actively supply current...
by Jozzer
Oct 24 2015 6:34am
Forum: E-Bike General Discussion
Topic: Agni 111rdr
Replies: 10
Views: 959

Re: Agni 111rdr

Batteries - depends how well you understand the risks - but assuming you need a small light pack, Lipoly is probably best/easiest/cheapest.
Bike - lightweight and with easy battery storage space, and with an easy clean driveline to fit motor/chain/large sprockets.
by Jozzer
Oct 23 2015 3:00pm
Forum: E-Bike Non-hub Motor Drives
Topic: Revolt new motor RV 160 Pro
Replies: 88
Views: 18289

Re: Revolt new motor RV 160 Pro

Hi Miles, all good here thanks, I'm always happy when playing with a dyno, especially when it starts to get cold outside! Hope you're well and happy. We must catch up soon.. Do you want no load current measured motorside or batteryside? My RCL meter said that phase to phase resistance was 8 Ohms - I...
by Jozzer
Oct 23 2015 5:29am
Forum: E-Bike Non-hub Motor Drives
Topic: Revolt new motor RV 160 Pro
Replies: 88
Views: 18289

Re: Revolt new motor RV 160 Pro

I was told - "The KT of he 45KV motor is about 30(oz-in/amp)."

I've got one here for testing (53kv), it might take me a couple of weeks to get my dyno set up properly (and dial in the Sevcon controller) but I'll post some results when I can..

-Steve
by Jozzer
Oct 20 2015 4:46am
Forum: E-Bike General Discussion
Topic: Agni 111rdr
Replies: 10
Views: 959

Re: Agni 111rdr

Simulator won't work for Agni motors ;)
But yes - 60RPM per volt, 400A max, 220A continuous. Max temp at brushholder sensor 100C.
by Jozzer
Oct 15 2015 6:54am
Forum: E-Bike General Discussion
Topic: Agni 111rdr
Replies: 10
Views: 959

Re: Agni 111rdr

According to Justins simulator, 10kW would get you 70MPH - so a 5kW/h pack to do it for half an hour. And, 600A would melt your brushes in 3 seconds, continuous current is more like 220A. My advice, is if you want to use this much power and travel at these speeds - then convert a motorcycle not a pu...
by Jozzer
Oct 13 2015 7:20am
Forum: E-Bike General Discussion
Topic: Agni 111rdr
Replies: 10
Views: 959

Re: Agni 111rdr

The 111RDR makes 60RPM/V, and can safely run at 6000RPM max - so something close to a 100V battery pack is required to hit full power. You'd certainly reach 75mph on a mongoose frame - though traction/wheelies would be a problem in something that light!
by Jozzer
Oct 03 2015 9:05am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1169
Views: 179608

Re: Compact Field Oriented Controller, ASI + Grin, limited r

I'm not sure if you'll ever get sensorless mode to run on a geared hubmotor, though I confess I haven't tried very hard..
by Jozzer
Oct 03 2015 4:40am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1169
Views: 179608

Re: Compact Field Oriented Controller, ASI + Grin, limited r

Are you following procedures from this manual? http://www.ebikes.ca/downloads/BAC500_Controller_Manual_Rev%201.0.pdf Particularly page 42/43? Do you have it set to run on sensors - not the default setting to start with sensors then go to sensorless once the motor spins up? Are you saving the setting...
by Jozzer
Sep 28 2015 10:19am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Register bicycle as moped?
Replies: 14
Views: 1214

Re: Register bicycle as moped?

I've got a couple of customers in UK with road legal bikes - but it most definitely is NOT the same in all EU countries - where exactly are you based?
by Jozzer
Sep 23 2015 11:32am
Forum: Battery Technology
Topic: Potting Batteries, Thoughts and Experiments
Replies: 129
Views: 20019

Re: Potting Batteries, Thoughts and Experiments

Interesting experiments Justin. I bet that garage still smells bad now? :D Several years ago I potted a small pack of A123 M1 cells so they could be inserted into the frame of a trike - I've used the pack sporadically ever since with no problems (just cells potted with BMS pigtails and power cables ...
by Jozzer
Sep 14 2015 4:28am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1169
Views: 179608

Re: Compact Field Oriented Controller, ASI + Grin, limited r

I believe the large gauge red and black wires are actually for a charger connection, so that charge current is "counted" by the CA..
by Jozzer
May 05 2015 3:34am
Forum: Large EV General Discussion
Topic: Electric Miata/MX5.
Replies: 61
Views: 13296

Re: Electric Miata/MX5.

Yup charged to 4.2V, most often discharged less than 75% though a few full cycles. Probably around 180 cycles in the 9000 miles it did. Daily use at 14C, 1000A of torque was hard to resist :twisted:
by Jozzer
Apr 22 2015 3:20am
Forum: Motor Technology
Topic: Agni motor tuning and racing
Replies: 123
Views: 21369

Re: Agni motor tuning and racing

Some people are better at holding Agni's together than others ;)

Agni's are fine and reliable inside their rated power range, the problems start when people push them to double that and still expect them to be reliable - just like most other motors we use and abuse in our EV's..
by Jozzer
Apr 06 2015 4:55am
Forum: Large EV General Discussion
Topic: Electric Miata/MX5.
Replies: 61
Views: 13296

Re: Electric Miata/MX5.

The car performed great - just I have limited use for a 300HP+ car that can only fit 2 people. I also moved home and business - so decided to free up the resources and build a bigger car next year! I have as much fun building EV's as I do using them, so it wasn't a huge loss.. Sorry no video, we did...
by Jozzer
Mar 29 2015 4:26am
Forum: Motor Technology
Topic: Agni motor tuning and racing
Replies: 123
Views: 21369

Re: Agni motor tuning and racing

I've dyno'd both brushholders (the other one is made by LMC), and I got more or less equal power from both, BUT with significantly more arcing from the LMC holder. THe thick wedge shape means that timing is not as precise, and the trailing edge makes lots of fireworks. I destroyed 2 sets of their br...
by Jozzer
Mar 29 2015 4:20am
Forum: Large EV General Discussion
Topic: Electric Miata/MX5.
Replies: 61
Views: 13296

Re: Electric Miata/MX5.

The car was dismantled last summer and parts sold - but all the Lipo live on. Some was refitted to another electric car (the owner had killed half his pack by overcharging it with a homemade charger!), the rest is boxed up here to be refitted to one of my motorcycles later this year.. Motor and cont...
by Jozzer
Jul 15 2013 2:43pm
Forum: Motor Technology
Topic: Agni motor tuning and racing
Replies: 123
Views: 21369

Re: Agni motor tuning and racing

Hope that brush set arrived OK for you doc! We've just got our first of the new 155r motors in - 230mm diameter, 18kg, 135mm wide - the BIG Agni is here at last! Hello Jozzer, Thanks The brush arrived fine last week. I have confirmed that to Leslie. :wink: Lol - she always say's I don't talk to her...
by Jozzer
Jul 15 2013 2:36pm
Forum: Motor Technology
Topic: Agni motor tuning and racing
Replies: 123
Views: 21369

Re: Agni motor tuning and racing

I'll get on it this week Luke/Brock - the motor's just arrived and I'm not at the workshop for a couple of days. I've not been in the loop on testing/development of this motor particularly, but the early prototypes were very promising. One of these fatties on the back end/load of my dyno easily outl...
by Jozzer
Jul 15 2013 1:43pm
Forum: Motor Technology
Topic: Agni motor tuning and racing
Replies: 123
Views: 21369

Re: Agni motor tuning and racing

Hope that brush set arrived OK for you doc!

We've just got our first of the new 155r motors in - 230mm diameter, 18kg, 135mm wide - the BIG Agni is here at last!
by Jozzer
May 21 2013 7:34am
Forum: Motor Technology
Topic: Agni motor tuning and racing
Replies: 123
Views: 21369

Re: Agni motor tuning and racing

Well, seems to me that the extra springs would increase drag on the brushes reqired direction of travel in an unpredictable manner, possibly creating new problems - but like I say, I've not tried one myself! Of course the added springs would do nothing to correct a poor commutation surface, which is...