I'd like to share my test results with this BMC V3 Motor & 50A Controller too.
After a full year of recovering from a broken shoulder I'm sure glad to be getting out riding my ebike again. I did some upgrading and installed the BMC V3 1000W Motor & 50A Controller last month. I also constructed more powerful battery packs (Headway 36v 40Ah). I've been riding this setup for the past 2 weeks now and I've been very pleased with it. I started out with a short 6 mile ride but have been increasing my distance each time out and my last ride this past Sunday was a very long 86 miles. So I thought IÃ¢â‚¬â„¢d share some my results running the BMC V3 Motor & 50A Controller at 36 volts.
CONTROLLER FEATURES Ã¢â‚¬â€œ The controller has colored jumper wires that IÃ¢â‚¬â„¢ve extended up to the front handle bars where I have switches mounted. Closing or Opening these Jumper Wires on the controller gives the following:
- Hi/Lo Speed Control
- Cruise Control
- Soft/Hard Start
At 36 volts this motor/controller combination has MORE THAN ENOUGH speed for my commuting purposes. Full throttle on LOW Speed gets me up to 24mph. Full throttle on HI Speed gets me topping out at 32mph. I consider this pretty good because I'm a pretty heavy guy (weighing 280 pounds) plus I've got 40 pounds of batteries. Most of the time I ride on LOW Speed since my comfortable riding speed is between 17mph and 25mph anyway. So I really have no need to run at 48v to go any faster.
IÃ¢â‚¬â„¢m pleased to say that BMCÃ¢â‚¬â„¢s cruise control acts more like a Ã¢â‚¬Å“real cruise controlÃ¢â‚¬Â than CrystallyteÃ¢â‚¬â„¢s does. Once the cruise control is set, the speed stays pretty constant even when riding thru moderate (5%) grade changes in slope. As I transition from flat to a 5% uphill grade I can actually see amperage and wattage on the Cycle Analyst increase to more than double to maintain constant speed. Likewise, power drops down when going downhill. In contrast, the Ã¢â‚¬Å“fakeÃ¢â‚¬Â cruise control on the Crystallyte acts more like a Ã¢â‚¬Å“throttle latchÃ¢â‚¬Â rather than a cruise control. It doesnÃ¢â‚¬â„¢t maintain speed at all.
I really like riding with this feature turned on. IÃ¢â‚¬â„¢ve noticed that throttle response on regular Ã¢â‚¬Å“Hard StartÃ¢â‚¬Â is very twitchy when using these BMC V3 and V2T motors. You have to be easy on the throttle when you accelerate from a dead stop otherwise the bike lurches forward violently. The motor also lets out an unpleasant Ã¢â‚¬Å“moan & groanÃ¢â‚¬Â noise until your speed increases above 5mph then the sound quickly tapers down. With the Soft Start turned on the bike doesnÃ¢â‚¬â„¢t lurch forward and I donÃ¢â‚¬â„¢t hear the awful moaning noise when accelerating hard from a dead stop. Just smooth, steady and strong acceleration. There is, however, a short Â½ second delay between applying full throttle and the bike actually accelerating, but I got used to that short delay quickly.
I canÃ¢â‚¬â„¢t give a thorough evaluation about this yet. I really need to do more testing with this setup on more hills. I have tried climbing a fairly Ã¢â‚¬Å“monster hillÃ¢â‚¬Â on my commute that varies between 10% and 16% (according to MapMyRide.com) for a good Â¾ mile. My system is capable of 1,950 watts (39V x 50A), but I was taking it easy and not giving full throttle. I was confident to only give enough throttle to sustain 1,200 watts during that test climb because I was many miles away from home and last thing I wanted to do was fry more phase wires or burn up my motor and controller and be stuck so far away from home. But at 1,200 watts I was still able to steadily climb that hill at 12mph with some mild pedaling. I can also say that this V3 motor climbs hills very similar to my V2T motor (the one I melted phase wires in last year). As I get more confidence with this system IÃ¢â‚¬â„¢ll try steeper, longer hills with more throttle and let you guys know what I find.