Johnbear wrote:Maybe part of my problem is my riding style. I am so used to the more powerful motors that maybe I am pushing the motor a bit. (I do pedal) Still though, the controller cutting out on a cool day seems a bit odd. I have only tried the motor twice so far. It is laced to a 26 inch rim. Do you find your controller gets really hot? Can you check? Thanks!
Well, I read this this morning & didn't have time to reply before setting off to work. I was going to respond by saying that the EV controller is housed in a kind of mesh pocket at front of the battery pannier & therefore seemed to stay pretty cool most of the time as it always had access to ambient airflow. I've riden to work on plenty of 30'C+ days this summer & even some 40'C+ without any problems.
As far as I know the controller does stay cool with this setup, however I did run in to some trouble today. About 1/3 of the way into my 10km commute the motor gave a fairly loud click and from that point on I only had pedal power!
I sure worked up a sweat lugging the extra weight.
. So, I guess I'm off to EV on Saturday morning to have them check it out .......I'm pretty sure it will be the controller that's the problem. Here's what Scott at EV had to say about the setup when I inquired before purchasing: (Tongxin=EVO3 in discussion below)Geared motors are significantly more efficient and have no resistance when freewheeling. No comparrision to non geared motors. We test our bikes/motor on a dyno simulating real time usage conditions and test them to destruction point. Have yet to kill a motor, only controllers and connectors under extreme load.
We also run each motor through a course on a bike using a computer battery monitor called a Brain Drain to review efficiencies etc. This course follows the bike path from the Knoxfield store through Ferntree Gully then up the tourist rd to Olinda and involves a 12% grade throught the devils elbow. Both motors perform very well. Best time from Burwood HWY up the elbow to the servo at ferny creek is 7 min 13 sec's on the evo 3 Li on a dual suspension MTB with slick tyres.
Nylon and friction bearings. We have never had a motor strip a gear.
The motors are very different in weght. 2.3 kg v's 4 kg. The SLA motor
has more torque. On a light weight bicycle the EVO 3 is the way to go.
We don't offer the EVO 2 motor with Lithium Batteries. We found the EVO2 motor to be a little hard on batteries.
We use a computerised dyno to test our motors. Over a standard
undulating course. The results are similar. Start up torque on the EVO
2 motor is better however both motors perform around the same level.
The EVO 3 is around 10% more efficient.
Motors no longer assist after 35 km/h infact most assitance is given
between 25 - 30 km/h
I'll quizz the guys about your intermitant problem and see what they have to say.
With regard to riding style I try to get the bike moving a little with the pedals, especially if starting out on an uphill grade, but once I've got a little momentum I pretty much always have the throttle to the stops if road surface/traffic permit. I weigh in at about 55kg so I may have an advantage there....