Brushed hub motor

[Kurt]

Somebody shoot me and put me out of my misery

I went today and got myself a 16 tooth free-wheel the correct size to screw on my wife's hub.Got home screwed in on and started to feed the chain through and I see another problem the 7 speed derailer's chain is the same pitch but to thin to ride over the free-wheel sprocket.

I found a 6 foot length of wider chain that i had spare for my geared ebikes. This chain fits over both free wheel and front chain ring. I will need to tension it and the chain wont feed through a standard rear de railer so I will pull down an old de railer and make my own chain tensioner from it .

I realise I can get a single speed free-wheel that will fit the thinner chain but the bike shop said they would have to order it in. They kinda gave my she shits when I went in there today so not keen to go back. They tried telling me that all electric bikes were illegal in my state bla bla bla not sure what there problem is they don't seam to like electric bikes. I more or less told him he his full of **** in nicer words. When I got home I looked up the local road traffic laws for my state.there is a page about powered bicycles.I emailed the bike shop to correct them so they don't go misinforming other customers.

hopefully the bike will be running by the weekend and my wife daughter and I can all go e biking.Thinking of installing the cycle analyse to her bike for the weekend just to get some data.

Kurt.

[voicecoils]

the bike looks good to me

There is 1/8" bicycle chain (for single speeds and BMX bikes) and 3/32" chain for multi speed bikes.

3/32" chain sure does not fit on 1/8" sprockets, I've been there before!

Fortunately 1/8" chain is quite cheap, such as here: http://cgi.ebay.com.au/ws/eBayISAPI.dll ... 0326041542

Most bike shop operators will have never seen a decent electric bike before (just scooters with pedals etc..) It's just another facet of EV's not being taken seriously. I'm hoping my eBikes will change the minds of some of the bike shops I go to.

EDIT I just reread your post. If you want to keep the gears, let me know. I've got a 16T 3/32" freewheel that I can swap with your 1/8" one if you like. I've got a singlespeed bike that I use 1/8" track chain on with an 18T rear sprocket so it would be no inconvenience for me. PM me and let me know if so.

[vanilla ice]

Somebody shoot me and put me out of my misery.

Dont feel bad. I did the same thing last week. Was going to convert the schwinn 700c'er to a 3 speed, but the damn 16t bmx sprocket wont work with the multispeed chain! Should have checked first. I ended up relacing the rim to an old (k)rusty 5 speed hub from my junk pile instead.

Nice trade offer there..

Does anybody make multispeed 1/8" chain btw?

[voicecoils]

Does anybody make multispeed 1/8" chain btw?

Don't think so. searching sheldonbrown.com would be your best bet for finding an answer.

[vanilla ice]

I think I read on his site there were some 5 speeds before the first 3/32 chain in the 50's.

BTW BRUSHED MOTORS PWNZOR!!1

[Kurt]

My wifes bike is finished and has been taken for some longer test runs.The two things I dont like about it is that unless you a just riding on the flat section it gets hot.Seams to load up very easily beacuse if its lack of torque.I could relate it to driving your car around in top gear all the time.

The second thing that is prob related to the first is the motor gets hot.Even after a couple of km its not burning hot but very very warm.

I jumped back on my bike with 5304 and its like night and day to ride. Makes me appreciate just how good a motor the x5 is.The little brushed motor will be ok for a while but I don't think it will last very long due to the stress its under.The lack of torque in my books kinda defeats the propose of a e bike as the inclines is were you want assistance most.

Perhaps I can fins some one who lives on a salt lake to buy it

looking back on the experience I probably should have just got a 5304 for her bike from the start. I can see the change over happening soon.

kurt.

[lawsonuw]

The lack of torque in my books kinda defeats the propose of a e bike as the inclines is were you want assistance most.

And now you know the main reason I've hardly ridden my Trek (the other reason is I got hooked on recumbents...)

Marty

[chizno]

Brushless is definitely the way to go. Brushless motors will last a lifetime if taken care of (which basically requires you to not throw it into a lake )
Wattcycle.com carries a bunch of different brushless motors by Crystalyte. Some of the motors have really high end speed such as the Phoenix Racer. Others are VERY TORQUE-Y like the Phoenix Brute. They even have one that's a nice blend between the two such as the Phoenix Cruiser. As always, it really matters what kind of Voltage you're putting through the system. 48V 40A systems are really nice.

Below is a chart for the Phoenix systems I pulled from the wattcycle.com website -

chart_phoenix.gif

Chart showing acceleration of the different motors at different volts.

(17.47 KiB) Downloaded 105 times

Here's a kit that's sold by wattcycle, but you can also just get the motors themselves as well.

wattcycle_kit_800.jpg

This is a kit with an added battery rack.

(123.19 KiB) Downloaded 224 times

[ekline309]

does anyone have a diagram or pics of a disassembled brushed hub motor?? How are the wires from the commutator fed through the axle?? I don't get it...

[Microbatman]

2nd that

Where are the brushes and commutator?

I am having a hard time grasping inside the motor picture posted earlier and undestanding it.

The rotor looks like the stator and the stator looks like the rotor.

When it comes to a brushed type motor I am so use to seeing this maybe need to turn this inside out to understand the concept.

Looks like I figured it out.
The brushes are no the other side of that black disc and the commutator connections are on the other side also.
The wound copper part spins
The magnets stay stationary.
We are all just use to seeing brushless were the rotating part has magnets and stator has copper.
In this design its fliped. Rotor has copper Stator has magnets.

[TylerDurden]

does anyone have a diagram or pics of a disassembled brushed hub motor?? How are the wires from the commutator fed through the axle?? I don't get it...

Where are the brushes and commutator?

viewtopic.php?f=3&t=4102&p=184902&#p184902

[vanilla ice]

Silent motors that you can score for cheap... great for low power setups.

And like someone mentioned, controllers are commodity items. The one wired up to my hub was less than a twenty!

[Microbatman]

TylerDurden

Thanks for the pictures.

Thats about as good as a good answer can get.

Nice to see the innerwokings of an lower cost alternative to a brushless.