Outrider high speed run.....

[yawstick]

Cool run. I think you need a bigger front ring on that thing.

I've ridden one of their trikes in normal configuration. Their trikes have the Schlumpf 2 speed crankset... very effective at 40 mph. maybe not so effective at 80 mph.

 

[MitchJi]

Hi Matt,

Its cool... But why did he have to peddle then ease into the throttle? Is this a controller problem? Someone build this guy a lebowski controller.

It starts fine from a standstill. They did that to prove it was pedalable.

Arlin is trying to diplomatically say that the lebowski controller brain is much better than an HV160 (which is irrelevant unless you need a project to complete your PHD as an EE ):
http://endless-sphere.com/forums/viewtopic.php?f=30&t=51342&start=400#p883305

It took me a while to get started, then it took me almost a year to get to this point. I told you I was going to build a controller, I just didn't do it very fast since I needed to learn how to design a gate driver and a power stage. Now its much easier. It's a heck of an experience to go through. I too feel ratified that I am able to ride around on a controller I designed, built. It's a bonus that this first design works so well.

I got up and running on one of the regular Cromotors tonight. Got it working the best I could in normal sensorless mode, then learned the FOC parameters and took it out for a spin. It rips pretty good with 200 phase amps, but it would feel much better at 300A phase. Now I need to hurry up and start building my 2nd controller so I can experience higher phase current.

I also tested out sensorless push start. It works very well. The motor tends to pulse at idle before I start, not sure how to stop this behavior.

Need to wire up the 2nd throttle so I have variable regen next.

[youtube]ISMXZWT1VBY[/youtube]
[youtube]2f4Asgt1gjY[/youtube]

This is the same controller but now I'm using a 100V pack trying to stress the components even more. Almost all the noise you hear from the bike is coming from the freewheel clicking and air moving around the bike. The motor is virtually silent with this controller.

That is awesomely smooth and controlled and silent in your video.

People don't realize how much better it is to ride. I want to see Lebowski brains in every motor controller for every bicycle or EV or RC model or whatever. This is next generation motor control.

It is very good. When I got the YSR running properly it was amazing! People don't realize how all the little features are so very cool like variable regen and smooth torque throttle the transition from sensored to sensorless and the list goes on. Then there is the VERY important things like the phase current sensing and how It all works which makes it 1000s of times better and more reliable then a china controller!

I now have 5 sevcons to program and compare to which I don't think will transition to sensorless do they? They are just stuck in sensored or sensorless all the time and this is likely why Zero spends the time with a fancy Sine/cosine setup..... Anyways I will be able to report against one of the best off the shelf's controllers we can get for a reasonable price to a properly build controller running lebowski's brain soon enough.

This is more advanced than a sevcon or any commercial EV control I've ever seen a plethora of ways.

If it can be made high enough speed, this could conceivably make the most epic RC controllers, all the and scale all the way up the massive hubmotor dump-trucks or giant ship drive etc.

This is the closest thing out there for being the theoritical 'ideal' controller that it would require to make FEMA simulations actually realistic.

It is like the optimization of motor control. All motor controllers that don't run this method of control will be called '1st gen motor control'.

This is the control strategy that electric vehicle motors will be powered in future vehicles.

If you have a motor that has perfect sinus BEMF, than this would offer you no performance advantage over say a sevcon gen4. However, no motor is perfect, and many quite far from it, it is not optimized to drive them with trap or sinus drive. That reduces one entire harmonic EM loss component from your drive, as well as makes any motor output previously impossibly smooth torque. (Unless your motor had nearly perfect sinus BEMF, then you could have had the same level of smoothness).