Brushless razor e300

[x_doug_x]

I had the idea of putting a brushless motor on a e300 razor scooter. Decided to google it and see if I got any hits. In deed, I did!


So, I have a few questions for the people who have done this, what kv motors did you run?
What's the top speed of your scooter?
How many volts are you pushing to the motor?
Is there a conversion motor mount or can you buy regular 550 , 540 or any type of motors that bolt rite up?

I've searched and found threads describing the esc's esc... Nothing about speed, volts , etc... Picture of the original stock setup of the internals on a e300 would be awesome.


I personally would like to build a e300 that would run 40-50 mph with a hour run time.

 

[kfong]

The E300 is not a very stable scooter above 20-25 mph due to the steering geometry. You might look into this before putting a lot of effort into the project. Brakes are really crappy as well.

 

[x_doug_x]

Meh... I'd still like to try it. I already have this motor

1518/1Y 1,900 14.5 3.3 TBD TBD 60K 1,500 watts 3,000 watts TBD TBD $279.00 Build It

I also have this esc.
http://www.castlecreations.com/products/mamba_max_pro.html


I have another motor that is a 2600kv motor for speed. However, This motor would most likely overheat if I put too much too it. I am pretty sure the motor above would be a practical motor for this conversion.

 

[x_doug_x]

The E300 is not a very stable scooter above 20-25 mph due to the steering geometry. You might look into this before putting a lot of effort into the project. Brakes are really crappy as well.

There most likely won't be much effort. Just maybe 100 bucks.. I already have lipo's, already have the brushless motors, esc's, I just need to know if I can purchase a sprocket for the motor I already have. I think it's a 1mm shaft. I also need to know If the esc's I have will work and if there is a conversion that will allow me to bolt this motor up?

 

[x_doug_x]

Anyone know if this motor would be suitable? Spoke to be 2 or 3hp

 

[parabellum]

Stand up scooter and 50mph?
I will guess you need up to 6KW constant to overcome air resistance with this aerodynamic properties.
Then ~120lbs of LiPos to sustain it for 1 hour and motor + controller capable doing it without overheating.

This controller hopefully has enough room to withstand stall condition.
http://www.hobbyking.com/hobbyking/store/__17392__Turnigy_Fatboy_300A_ESC_5_15S_OPTO_.html
this motor is a powerhouse, but unfortunately not in sale anymore.
http://www.hobbyking.com/hobbyking/store/__5142__Turnigy_80_100_B_130Kv_Brushless_Outrunner_eq_70_55_.html
But a bigger version of this one will should come is sale soon
http://www.hobbyking.com/hobbyking/store/__17987__Turnigy_RotoMax_50cc_Size_Brushless_Outrunner_Motor.html

Your project is very ambitious!
Welcome to ES

 

[x_doug_x]

I see what you listed, I would like to see if there is a convesion mount out for the motor esc I already have. The esc I have will handle 120am continues. I dunno what the burst is. This should be enough to start with for a small project, even if it only runs 30mph. the esc I have will also hold it.


Is there a conversion mount available for this motor?

 

[parabellum]

Have no razor e300 but I imagine there will be brushed motor chain (or belt) connected to the wheel. First thing you need to do is figure out your motors rpm or desired rpm on top speed. Motor you listed has 1250kV which will be max a 25000rpm on 6s LiPo. Al that needs to be geared down to 3000-4000 rpm (depending on the wheel size I just took about 4" diameter) What is the size of your front and rear sprocket (tooth count)? If it halfway in 1:8 or 1:9 range, you could just see how to mount front sprocket on your motors. What is original motor shaft diameter, your new motors shaft diameter? I have not seen some of shelf kits for this conversion but it does not look very difficult if your components are right.

I dunno what the burst is.

I dunno what you mean with burst but stall condition is when you start rolling from 0. Usually it kills escs and controllers with no phase current limiting. It can be avoided if you have far over sized esc or first push and get in to movement and then accelerate slowly. After the motor spins, it is not so stressful to your esc.

Edit:Sorry I took wrong kV, yours is 1900kV which makes over 38000rpm on 6s, so you gear down will be between 1:10 and 1:13

 

[Erogo]

Did you say the motor has a 1mm shaft?

If so, that seems real small to me. I'm more used to bicycle loads, where I think 8 mm or so is needed. You can calculate the torque that the shaft would need to withstand to achieve the acceleration you're hoping for, then calculate the maximum torque a shaft of that diameter can tolerate, and compare the two. It might be that with your higher motor speeds and therefore higher gear ratio, the shaft has to handle less torque?

Eric

 

[parabellum]

Did you say the motor has a 1mm shaft?

If so, that seems real small to me. I'm more used to bicycle loads, where I think 8 mm or so is needed. You can calculate the torque that the shaft would need to withstand to achieve the acceleration you're hoping for, then calculate the maximum torque a shaft of that diameter can tolerate, and compare the two. It might be that with your higher motor speeds and therefore higher gear ratio, the shaft has to handle less torque?

Eric

I have noticed that to, but the shaft is actually 5mm in specs sheet. Not the best for side loads, but better then 1 mm. Type error maybe.

 

[vanilla ice]

Like they said you need to figure out the correct gearing (kv). Otherwise the motor will be outside of its happy place. I'm not sure what your goals are, but if you stick 15s of lipo in there with a new brushed controller, the stock motor goes pretty well. About as fast as I would want to go without swapping to a suspension/disc front end anyway.

 

[x_doug_x]

Bout the highest I can go on lipo rite now is 10s, I have 2 3s packs and 2 2s packs. those are going to be hard to monitor when mixxed being that 2 are 5,000mah and the other 1 are 4,000mah.... I have mixed them though. been pretty lucky running lipo's even without lipo cutoffs. Just turn them off when I realise the rc's are losing power. But yes, the motor is a 4 or 5mm shaft, Whatever was posted above. that was a error on my part. I don't think the conversion would be hard I just need to know how to mount this motor. I don't have a welder or cutting torch. No aluminum welder. Need something that might just bolt up. Was really hoping for a conversion.. Do they sell sprockets for a 4 or 5mm shaft?

 

[kfong]

I don't think that shaft will take the side load you will be putting it through. 8 or 10 mm is what I would go with.

Bout the highest I can go on lipo rite now is 10s, I have 2 3s packs and 2 2s packs. those are going to be hard to monitor when mixxed being that 2 are 5,000mah and the other 1 are 4,000mah.... I have mixed them though. been pretty lucky running lipo's even without lipo cutoffs. Just turn them off when I realise the rc's are losing power. But yes, the motor is a 4 or 5mm shaft, Whatever was posted above. that was a error on my part. I don't think the conversion would be hard I just need to know how to mount this motor. I don't have a welder or cutting torch. No aluminum welder. Need something that might just bolt up. Was really hoping for a conversion.. Do they sell sprockets for a 4 or 5mm shaft?

 

[x_doug_x]

I think that will all depend on gearing. Maybe the shaft won't hold it, I dunno. I do know that a powerwheels motor has a lot smaller shaft and about 1/10 of the hp as this motor makes. Powerwheels can push a kid 80-100 lbs around. I'm 180. I think this motor has enough power to move me, it just really depends on how much torque it makes and the gearing?

 

[vanilla ice]

Theres not much you can do to raise the ratio on an e300 because the wheels are too small.. unless you want to go 2 stage.

 

[x_doug_x]

There looks to be plenty of room for a really small and really large sprocket on the motor, From my experience the front sprocket makes the biggest difference? 1 tooth on the front is like 3 or 4 on the rear?

 

[vanilla ice]

Your front is going to be like 10 tooth minimum. The rear you cannot go to 90t or even 60t because the rear tire is too small. The sprocket will hit the ground. So realistically you're looking at 5:1... Which may not suit your motor. I think the stock sprocket is 33tooth, I've read you can fit up to like 50t. I would measure the tire OD and figure out the real rpm/v on the motor and start calcalatin from there.