KillaCycle 7.82 @168 MPH !!!!!!!!

[sweetgyy]

wow that's great! advanced battery technology so that way we can be more retarded and wasteful . bravo!

[toilit]

Eco dragster! with zero emissions!except for burning rubber! nice one! i am impressed!

[normellow]

Killacycle is God!!

[Dante1969]

An electric engine has a monster torque.

I read of a car with 90 kgm ( 900 nm) or similar

[panzerkw]

They are the ones pushing the envelope and setting records, they obviously know what they are doing, if you bookworms out than can beat them, walk the walk, not talk the talk.

[EETechs]

I have posted a message to you tsport100. Lutach, go to Amazon and order "Modern Industrial Electronics" ISBN 0-13-048741-4. It goes into detail of the different motor types and their torque characteristics. Btw, What you are referring to is a universal motor which is somewhat similar but designed efficiently to work with AC (can run on DC also) by reducing the eddy currents using iron insulated laminates instead of solid iron as in series-wound motors for the field poles.

[lutach]

So why don't we see more of this Series-wound DC motors in trains, ships and other heavy duty machines. The US Goverment knows something about 3 phase Induction motors (or 3 phase brushless motor as some might call them) as some of their most sophisticated war machines use them. My guess is that book is outdated and you need some knew information on the subject. I'm sorry but the motors used in the Killacycle is just outdated.

[gerfriedc]

more literature citations? Chikkam- PERFORMANCE OF DISC BRUSHLESS DC

MOTOR APPLIED AS GEARLESS DRIVE FOR

WHEELCHAIR - quite advanced toroidal axial design- I guess power per weight ist they key issue and best would be to burn the motor at the end of the run....

[gerfriedc]

just a quick benchmark - how man Nm per kg you have guys- I think 7,5 is the best value we may find amongst hub motors...

[tsport100]

I have private messages blocked, you'll have to answer in public.

[gentoodaemon]

I agree with EETechs. DC series wound motors produce massive amounts of torque at 0 and low rpms. They are favorites when it comes to moving heavy inertial loads. But in modern transportation AC motors have caught up due to advancements in high power semiconductors (insulated gate bipolar transistors) and variable frequency drives/inverters.

[EETechs]

Series-wound DC motors provide the most torque of all the other motor types. Not only that but DC motor's speed is easily controlled by varying the voltage by todays means of using Pulse width modulation control which is exactly what the Zilla controller on the Killacycle does.

[tsport100]

How do you back up your claim about series-wound motors having the most torque of any type? A typical Diesel Electric locomotive runs 10,000 Nm of torque per axle and they're fairly typical 3 phase AC Induction motors!

[lutach]

My point exactly. There are also the DC versions and some have the ability to put out 700HP+, but the only problem is or was the battery. Series-Wound motors also have an RPM limit of I think 6000RPM (I'm not sre on this one, but any input would help), while the motor I mentioned that makes 700HP+ (Depending on the voltage and AMPs used) can spins at 20,000RPM.

[lutach]

I still think they can go faster. If they are going to put this technology into real world, they need to step up to the technology.I know there is a lithium battery that puts out as much as 1500A. It weighs more then a sigle A123, but you wouldn't need as many to accomplish the AMPs recquired.

[lutach]

Nice. The bike could be faster though.

[killacycle]

Speed costs. Write the check and we will get the rest of the bike to catch up with the batteries.

[lutach]

The technology is out already. You guys are just playing with old school technology.

[hempev]

There is nothing faster now, either designed or built...everything else is "out there". It may run on old-fashioned series motors, but AC is a long way from this much torque in this small a package, and no-one is spending the bucks to do so. This bike can go faster than 7.82 seconds in the quarter - you know that because it keeps breaking its own records!

[mtu1983]

Unfortunately the DC motors are the best thing out there for this application. AC motors require alot more control hardware and software and the IGBTs required to handle that kind of current in an AC application would require decent size caps to run with, those all take up space and weight. And not everything is old school, they are using top of the line tech in the battery market.