magudaman
10 kW
Since I have none of my other builds here:
This thread represents my couple years of trying out different aspects of the small electric vehicle industry and what has resulted in my latest project. First I going to give some history that has lead up to this moment:
First electric vehicle is Go Motorboard x1500 which of course was only limited to road since it use solid wheels. This scooter is great, lightweight and foldable! But the drive system is friction biased and is terrible. It burns up tires quickly, especially if you use the regen system. But this was the one that started it all.
The next scooter is Shwinn Missile FS scooter. This scooter was pretty cool for some time and was my first attempt at trying to get something that had some off road characteristics.
The full suspension and ability to have a standing position made it fun for some the simple gravel trails around my area. The scooter failed to have any real hill climbing ability since it was geared for 20mph tops and was only running around 1000w peak. So this was the first build I installed a 3 speed hub into the rear wheel of the scooter which gave me 3 speeds and better torque for hill climbing.
After using this for about 4 months I had several failures in the 3 speed hub which required rebuilding and I finally got completely fed up and called it quits. The soft steel frame had been bent over time and I sold off what I could and cut up the rest of the frame and threw it away.
The next scooter was purchased purely because of cost. I ended up buying the Shwinn S1000 gear driven scooter.
This scooter actually was really well build and re-instated my faith in Currie tech stuff. The motor was very powerful and surprisingly robust. They finally got the clue and were running neodymium magnets in their motor keeping it light and powerful.
The only real weak point with this scooter was it direct gear drive. After send back one for tranny failure the new one I received was doomed from the start. With a controller upgrade and running newly acquired a123 batteries, I was running 140 amps peak at 32v.
The amazing wheely poppin torque got my fixed and was a real blast off road with the ability to climb up anyhill.
The tranny held up great, until I stripped the pinion gear which was also the motor shaft. If that scooter could have been #35 chain driven it would have been great.
My most recent (and still running) has been created from my fear of failing drivetrains over the years. I am now running a Crystalye 409 at 85v with around a 25 amp peak. It is mounted in a 26in wheel and on mountain bike frame. Peak wattage I usually see is about 1700 watts with a top speed of about 35 mph. This bike has held up well and is great for all my on road needs. But the bug has bit me again and I crave off road.
SO my newest creation has some requirements.
1. I really want to use either a full suspension or downhill bike frame. I think the downhill would be best because it is strengthened everywhere, especially the rims.
2. I want lots of hill and wheelie popping torque. I have this hill in my back yard that nothing has been able to climb so far so. The S1000 was the closest but could get enough traction.
3. Must be brushless. I hate dealing with brushed core heating, inefficiency, brush failure, ect. I have seen through crystalyte how indestructible and powerful brushless can be.
4. The setup need to be chain driven. I want to be able to take this on very rough stuff with out worrying about magnets falling off inside a hub motor.
5. I will add more when I think of them
So now we are where we are today. I just purchased the first part toward this new project, THE MOTOR. This motor was too good to pass up and I felt the price was right. Here it is:
This is a BMC 1500w motor I am hoping to run on something like 48v 80a. It has a 7/8in shaft with a nice keyway. It appears to have built in thermresistor along with hall sensors. There is also beautiful 10 gauge wire already going into the motor.
Here is a mock up of what I want to do, just not this bike. I really think it would be great if I could find something that has rim brakes but is disk ready. This way I can use the disk mount for a big sprocket.
This thread represents my couple years of trying out different aspects of the small electric vehicle industry and what has resulted in my latest project. First I going to give some history that has lead up to this moment:
First electric vehicle is Go Motorboard x1500 which of course was only limited to road since it use solid wheels. This scooter is great, lightweight and foldable! But the drive system is friction biased and is terrible. It burns up tires quickly, especially if you use the regen system. But this was the one that started it all.
The next scooter is Shwinn Missile FS scooter. This scooter was pretty cool for some time and was my first attempt at trying to get something that had some off road characteristics.
The full suspension and ability to have a standing position made it fun for some the simple gravel trails around my area. The scooter failed to have any real hill climbing ability since it was geared for 20mph tops and was only running around 1000w peak. So this was the first build I installed a 3 speed hub into the rear wheel of the scooter which gave me 3 speeds and better torque for hill climbing.
After using this for about 4 months I had several failures in the 3 speed hub which required rebuilding and I finally got completely fed up and called it quits. The soft steel frame had been bent over time and I sold off what I could and cut up the rest of the frame and threw it away.
The next scooter was purchased purely because of cost. I ended up buying the Shwinn S1000 gear driven scooter.
This scooter actually was really well build and re-instated my faith in Currie tech stuff. The motor was very powerful and surprisingly robust. They finally got the clue and were running neodymium magnets in their motor keeping it light and powerful.
The only real weak point with this scooter was it direct gear drive. After send back one for tranny failure the new one I received was doomed from the start. With a controller upgrade and running newly acquired a123 batteries, I was running 140 amps peak at 32v.
The amazing wheely poppin torque got my fixed and was a real blast off road with the ability to climb up anyhill.
The tranny held up great, until I stripped the pinion gear which was also the motor shaft. If that scooter could have been #35 chain driven it would have been great.
My most recent (and still running) has been created from my fear of failing drivetrains over the years. I am now running a Crystalye 409 at 85v with around a 25 amp peak. It is mounted in a 26in wheel and on mountain bike frame. Peak wattage I usually see is about 1700 watts with a top speed of about 35 mph. This bike has held up well and is great for all my on road needs. But the bug has bit me again and I crave off road.
SO my newest creation has some requirements.
1. I really want to use either a full suspension or downhill bike frame. I think the downhill would be best because it is strengthened everywhere, especially the rims.
2. I want lots of hill and wheelie popping torque. I have this hill in my back yard that nothing has been able to climb so far so. The S1000 was the closest but could get enough traction.
3. Must be brushless. I hate dealing with brushed core heating, inefficiency, brush failure, ect. I have seen through crystalyte how indestructible and powerful brushless can be.
4. The setup need to be chain driven. I want to be able to take this on very rough stuff with out worrying about magnets falling off inside a hub motor.
5. I will add more when I think of them
So now we are where we are today. I just purchased the first part toward this new project, THE MOTOR. This motor was too good to pass up and I felt the price was right. Here it is:
This is a BMC 1500w motor I am hoping to run on something like 48v 80a. It has a 7/8in shaft with a nice keyway. It appears to have built in thermresistor along with hall sensors. There is also beautiful 10 gauge wire already going into the motor.
Here is a mock up of what I want to do, just not this bike. I really think it would be great if I could find something that has rim brakes but is disk ready. This way I can use the disk mount for a big sprocket.
. I like that idea of using two sets, and I do remember seeing that on the blade's design; In fact I think the original blade had a rubber timming belt thing and then went to chain. I have to see if I can find a picture. This would also help keep my rear sprocket size down some. The motor doesn't have internal controller, it has three heavy leads running in and ran great on my sensorless motor controller from my RC. It does have two extra wire coming out of the hall sensor cluster but I think they are just a thermoresistor.
