CNCAddict wrote:The quality of my motors is pretty good, it may not have quite the fit and finish of the Plett, but as for reliability in a dirty E-bike environment it will be way better since I'll use sealed bearings and plan on making it fairly corrosion proof. Also, while there may be no squeal from the PWM frequency, it'll probably groan a little during hard acceleration. But that will go away when up to speed.
recumpence wrote:That is the way I feel about my Plettenberg. I am absolutely in love with it! The motor is smooth, powerful, tractable, cool running, VERY high quality, and just plain sweet! The down side is............. gulp, $1,100!
Terminator 30-8 US$ 929.00
CNCAddict wrote:I can offer low rpm versions of the motor for people who want lower power. Even at 1000rpm the motor should still be able to push a bike pretty well, but then the motor would need to be derated to about 600W power. This motor's power output is pretty linear with RPM, double the RPM doubles the output power.
recumpence wrote:#2 I just spoke with Castle Creations. The SHV200 is being released soon, however, the entire first production run is sold out. Second run is scheduled for 3 to 4 months from now. That stinks. But, I have found the HV110 to be fantastically stable if added capacitors are used on the input side. So, for anyone looking for up to 4,000 watts at 50 volts or less, an HV110 (with input caps added) is the most cost effective choice anyway. It is 1/3 the price of an SHV200. However, I am getting an SHV200 as soon as I can get my grubby hands on one.
Terminator 30-8 US$ 929.00
recumpence wrote:Yup, the heli version has an output shaft and an aluminum fan on the end of the bell. That motor is $1079. I actually bartered them down to $1000. Aparently they liked my project.
CNCAddict wrote:Haha, yeah I guess I'll officially be CNCaddict here and not Dave, lol. Anywho, I personally am going to stick a gates carbon 12mm on my bike to see how it goes. These belts are ridiculously strong, but I only have a reinforced plastic pulley right now borrowed from the ixi bike. It is designed for the poly chain belt, but I worry it will explode when I put over 100ftlbs of torque on it. Anyway, I got 3 8mm polychain pulleys for $125 with some haggling which isn't too bad. You can check them out here. http://www.ixibike.com/
Miles wrote:Hi David,
Looks like the ixi uses components from the C-Drive system....
So, now we have a choice of 60t, 80t and 100t pulleys....
CNCAddict wrote:Miles...I thought I would be the first to use that setup...aargh
Miles wrote:CNCAddict wrote:I thought you were going to make an adapter for the disc brake mount?
CNCAddict wrote:Miles wrote:CNCAddict wrote:I thought you were going to make an adapter for the disc brake mount?
My personal EV won't have any pedals. Just the belt going to the right side...I just want to make the setup pretty standard so I can use any top quality freewheel hub since I expect they won't last long with the huge amount of torque going to it. I've ordered most of the motor parts...and will begin carving up metal next week Still tweaking the stator and magnets....and I'm afraid this thing is gonna have HUGE cogging torque on the order of 1Nm. Prolly gonna make it a lowsy low speed EV motor. Everything I do to decrease cogging also screws up the motor performance. We'll see if that turns into a big problem, but I suspect it will be ok.
CNCAddict wrote:P.S. Castle is still having problems with the SHV250 so now the ETA is a big question mark once again. I'm seriously thinking of starting an open brushless design group to get this going. OSMC has never really warmed up to the brushless idea, and there is a giant hole in the market for a reliable, tweakable controller that is adaptable to a range of voltages and currents. I'm developing some nice motors...but they won't be worth much without getting some serious current and voltage to them
've just found this forum and would like to introduce myself in my first post.
I work for a company in Exeter, UK called Green Energy Technologies Ltd
We are just getting into the electric vehicle market with some brand new technologies. Our first product is a high efficiency Power/Motor Controller that we call Split-Pi. It converts up and down, so you can have 0 to 2 times battery voltage supplied to your motor and it is bidirectional allowing current to flow from battery to motor to accellerate your vehicle or from motor to battery for regenerative braking. It also has a nominal efficiency of 95% and peak efficiency of 99% at full load. The output voltage is PURE DC, not PWM like most other controllers. PWM controllers also loose power in motor heating, but with pure DC, motor heating is dramatically reduced. Quick specs are 0-60V +-25A (1.5kW)
We have found many applications for this particular product, I wanted to know what you all thought of it for electric vehicle applications and stir up some interest. We were currently thinking of small bike scale for this particular product. We have higher power (10kW) products in development for large bike and small car scale EVs and are also planning to produce a complete electric/full-series hybrid drive train solution using some new and novel technologies
The prices you see (Â£695) are for our current model of Split-Pi which is over engineered for a bike controller, we are making a smaller, lighter and cheaper version specifically for the bike market around the Â£250 price. I know this is still much more expensive than controllers currently on the market, but it has several key features that make it better than other things out there:
* Up and Down voltage conversion.
You could have a 36V battery pack and Split-Pi will supply 0 to 60V to the motor.
When it is down converting, Split-Pi will supply 0-36V to the motor and more current for torque
When it is up converting, Split-Pi will supply 36V-60V to the motor for extra speed
The output can be controlled smoothly from 0 - 60V
* Bidirectional for regenerative braking
Split-Pi allows the motor to recharge the batteries when braking
It will continue regenerative braking until the motor comes to a complete stop
* 95-99% Efficiency even under regenerative braking
* Pure DC output (not chopped up PWM with varying time-space ration)
keeps motors cooler and results in higher efficiencies overall
Split-Pi currently works directly with brushed DC motors, an additional commutator is required for Brushless DC multiphase motors.
Split-Pi completely replaces the PWM controllers you use at the moment. It supplies a variable DC output that can be digitally controlled using a 2wire communication protocol or it can be controlled with a variable voltage input, i.e. from a twist grip on a bike handle bar
We envisage this product occupying the high spec end of the bike market where people spend over Â£1000 ($1500) on a bike, the sort of people that like to have the very best in new technology.