Electric dirt bikes?

[oldskool]

Hey Oldschool, you work in electronics too???

Not exactly, I build 3D simulators. Mechatronics is a passion of mine, especially motor controllers and electronic actuators. I once designed a simple 555 PWM controller for my daughters Escooter and rebuilt a 200W electric bicycle (had plans to hop it up to 1000W). I've almost completed both a 2 and 3 DOF motion simulator so I can simulate extreme rides...once I've got some good quality footage...that's the next thing I need..a good helmut cam to grab some footage. I've often toyed with the idea of a dirt bike electric conversion, it wouldn't be hard, just those damn expensive batteries to try and source from a sponsor.

[takitimu]

i still think that you guys will see a big change for sure. Who would compalain about getting a 50hp electric bike that was under 80kg?

My issues will be battery life & reliability / heat, but if the battery cartridges are ~$500 & last 2 hours, I reckon it's all good, for me anyway I'd call 2 hours the minimum life required.

It'd be seriously cool being able to do a practise track in the garden & not upset the neighbours, not sure the g/friend would be so keen though .

[honda_power]

How friggin lame is that?! And the KTM... Ill never be seen on one of those.

[oldskool]

How friggin lame is that?! And the KTM... Ill never be seen on one of those.

LOL this conversation has started up before and ended up a homophobic bunn fight

[laserracer]

LOL this conversation has started up before and ended up a homophobic bunn fight

Just build one that takes 2 x everready d size batterys it should be a mean machine .. homaphobic buns are they anything like lesbian pavlovas..??

[oldskool]

Just build one that takes 2 x everready d size batterys it should be a mean machine .. homaphobic buns are they anything like lesbian pavlovas..??

yummy I love eating creamy pavlova pie, specially both at the same time!

[DELLORTO]

how can you see a trr90 or 110 as a motorcross bike???? they should of raced the electtric bike against a ktm 50sx or somtthing like that.....then you'd see the real side to electric bike.....


ive had several electric scooters...even though the power difference there is major i still think electric motors have a long way to go......electric motors do have issues with hill's and buying a new 200w motor is $300 imagine what it would be like buying a battery for a several thousand watt electric dirt bike....

[laserracer]

yummy I love eating creamy pavlova pie, specially both at the same time!

You can eat your creamy pie from both ends at the same time ????..Now that takes some doing

[cheese]

Not exactly, I build 3D simulators. Mechatronics is a passion of mine, especially motor controllers and electronic actuators. I once designed a simple 555 PWM controller for my daughters Escooter and rebuilt a 200W electric bicycle (had plans to hop it up to 1000W). I've almost completed both a 2 and 3 DOF motion simulator so I can simulate extreme rides...once I've got some good quality footage...that's the next thing I need..a good helmut cam to grab some footage. I've often toyed with the idea of a dirt bike electric conversion, it wouldn't be hard, just those damn expensive batteries to try and source from a sponsor.

yeah I've had ideas of electronic conversions too. I've had some ideas on how to better use a BLDC motor and I found some interesting articles on how better to control them at low speeds (rapid pulsing the on state) which is where you get alot of heat generated on the fets. Guys in the states are using basically a machine machine motor modified to power the huge scale RC planes that used to have 100cc engines in them.

You need also reasonable spec micro too as you have to control 3 phases. I've got access to as many M16 processors as i like (we use them at work) and have Altium on my PC so I was going to have crack at it. I need to work on PCB design a bit more though.

Batteries, cams etc well I'm meant to be going to Shenzen in China anytime soon. Let me know what you want and I can probably get it for you. We just got a pile of lithium batteries here for some 5w hand held paging gear we are making. 11.1v 1a (basically 3 cellphone batteries). Its amazing how miuch cheaper the gear is in China when you have a local buying it for you!!!

[cheese]

yummy I love eating creamy pavlova pie, specially both at the same time!

Hmm pav........ I made one in the weekend. If you ever have left over pav try putting it in pancakes as a filling....... YUM!

[barty5]

and now its a cooking class

[laserracer]

yeah I've had ideas of electronic conversions too. I've had some ideas on how to better use a BLDC motor and I found some interesting articles on how better to control them at low speeds (rapid pulsing the on state) which is where you get alot of heat generated on the fets. Guys in the states are using basically a machine machine motor modified to power the huge scale RC planes that used to have 100cc engines in them.

You need also reasonable spec micro too as you have to control 3 phases. I've got access to as many M16 processors as i like (we use them at work) and have Altium on my PC so I was going to have crack at it. I need to work on PCB design a bit more though.

Batteries, cams etc well I'm meant to be going to Shenzen in China anytime soon. Let me know what you want and I can probably get it for you. We just got a pile of lithium batteries here for some 5w hand held paging gear we are making. 11.1v 1a (basically 3 cellphone batteries). Its amazing how miuch cheaper the gear is in China when you have a local buying it for you!!!

Hell thats some techo shit you speak there cheese ... BLDC,fets,m16 processors,pcb,its like a whole new language..i still think 2 x size D eveready batterys is the go..but wait .. something more important ...mmm ..pavlova pie

[oldskool]

Batteries, cams etc well I'm meant to be going to Shenzen in China anytime soon. Let me know what you want and I can probably get it for you. Its amazing how miuch cheaper the gear is in China when you have a local buying it for you!!!

What I'd like is a portable SD recorder with RCA input. I've got enough ccd imaging sensors laying around to hook up, just need a solid state recording device to shove down my pants (for lazy racers benefit!).

[cheese]

I was going to be looking for those anyway. Have you looked at www.dealextreme.com ??

[krad_nz]

Not exactly, I build 3D simulators. Mechatronics is a passion of mine, especially motor controllers and electronic actuators. I once designed a simple 555 PWM controller for my daughters Escooter and rebuilt a 200W electric bicycle (had plans to hop it up to 1000W). I've almost completed both a 2 and 3 DOF motion simulator so I can simulate extreme rides...once I've got some good quality footage...that's the next thing I need..a good helmut cam to grab some footage. I've often toyed with the idea of a dirt bike electric conversion, it wouldn't be hard, just those damn expensive batteries to try and source from a sponsor.

Wow, I write motor control software for F&P Appliances. Its a small world huh. Brushless DC Induction motors to be precise, in an embedded environment.