Two electric motors one Bike
06-09-08, 01:33 AM
#1
newelectricbike
Thread Starter
Join Date: May 2008
Location: Aldover Catalunya Spain
Posts: 33
Bikes: Mountain Bike, Electric Mountain Bike, Guzzino Moped
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Two electric motors one Bike
Has any one tried putting two electric hub motors one on the front wheel and one on the rear of 200watts each with separate batteries and controllers?
06-09-08, 07:20 AM
#2
Junior Member
Join Date: Jun 2008
Location: Montreal, Quebec
Posts: 6
Bikes: A normal Norco 700C thing, my slow bike, that I use during the day in traffic. My first e-bike, with 2 50W goldenwheels hub motors, I call it my tractor. A different e-bike built 2008 winter, front/back suspension, 3 sets of chains. New/old set-up.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
You actually don't need two batteries but two controllers are in order. I did this with 2 X 500W golden motors and the bike turned out to be very heavy. It was very interesting nevertheless since the front wheel by itself had a little trouble accelerating but went faster than the rear wheel by about 5km/h. It's like having two speeds. After a while, my way of doing things was to start with the rear wheel and hold it full open and manage my real speed with the left throttle connected to the front wheel (open terrain, out of corners,...). Opening both throttles at the start also made the bike accelerate faster but after a short while, one of the wheel takes over the other and you end up saving current (not bad). Low speed (25km/h) / high speed (30km/h). The batteries have to hold on: 36V 7AH weren't enough even for one wheel, NiHm 36V 13AH were good for 20 minutes, Lithium 36V 20AH (same weight) made things real good.
Does this help?
Does this help?
06-09-08, 11:00 AM
#3
building a E-velo
Join Date: May 2008
Location: Moline, IL, USA
Posts: 110
Bikes: ActionBent Trident
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
you would need two throttles? Sounds like a complete waste of money to purchase another kit.
06-09-08, 12:13 PM
#4
Not A Senior Member
Join Date: May 2008
Location: Northern California
Posts: 66
Bikes: 2007 Jamis Dakar
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
also dont forget that the 2 motors are not perfectly in synch. One will be slower than the other causing inefficiencies that may negate the "benefit" of 2 motors.
I dont see a real reason to have 2 motors.
I dont see a real reason to have 2 motors.
06-09-08, 06:41 PM
#6
put our Heads Together
Join Date: Jun 2003
Location: southeast pennsylvania
Posts: 3,155
Bikes: a mountain bike with a cargo box on the back and aero bars on the front. an old well-worn dahon folding bike
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
2 wheel drive. Great for offroading.
For on-road, I'd definitely go with a stronger rear wheel motor over two weaker motors just to keep things simpler and maybe lighter. With a big hubmotor the amount of power you can put through one motor is really ridiculous - people are running some of those crystalytes at 5000 watts.
06-11-08, 07:19 AM
#7
Junior Member
Join Date: Jun 2008
Location: Montreal, Quebec
Posts: 6
Bikes: A normal Norco 700C thing, my slow bike, that I use during the day in traffic. My first e-bike, with 2 50W goldenwheels hub motors, I call it my tractor. A different e-bike built 2008 winter, front/back suspension, 3 sets of chains. New/old set-up.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 1 Time
in
1 Post
Good for doughnuts!
I shouldn't have ridden that stormy night after a little too much partying but I ended-up on a football field, all wet grass and started doing doughnuts and leaning the bike as much as I could until the rear wheel lost traction. That's hard, because the Golden Motors are strong but not that much. What was amazing was using the front wheel to keep me going. Front wheel drive has its advantages. Yeah! two throttles, but a lot of fun. Also works quite well with upward trails that are full of roots. You don't get stuck. Takes a lot of power from the battery and some pedal assist is in order, but the moment when by-passers realise that you're going uphill and pedaling backyard is priceless.
H.
H.
