tag:blogger.com,1999:blog-6231841547435511043.post3842822646934779523..comments2023-06-13T01:05:30.996-07:00Comments on The Electricle™ : Bicycle Electric-Motor-Assist Project: Death To All Controllers....M.E.http://www.blogger.com/profile/15375034485988839284noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-6231841547435511043.post-31178809763624595262009-06-20T09:48:15.702-07:002009-06-20T09:48:15.702-07:00The ring gear should probably be made of nylon. I...The ring gear should probably be made of nylon. It's light and durable. It can be fastened at the nut of each bike spoke.<br /><br />I wonder if the Zeta friction drive was a failure. It spreads the contact area over a length of flat belt. Even though it might be better than a roller in contact with the wheel, it seems kind of hard to implement still. <br /><br />I wonder if a bike can even be ridden by steering balance alone or if the gyroscopic action makes it possible at all. That's really got me wondering about something that I've wondered about other times in the past. --Joehttp://tech.groups.yahoo.com/group/switchmode/noreply@blogger.comtag:blogger.com,1999:blog-6231841547435511043.post-37338794742737079252009-06-19T13:53:58.869-07:002009-06-19T13:53:58.869-07:00Even if the ring gear were something other than me...Even if the ring gear were something other than metal, there are still mass issues with most of the durable enough materials. Those that are light enough may have either durability or fastenability problems. <br /><br />Gyroscopic action is undesirable (to me) in a bike, as when you need to turn it can prevent you from doing so as quickly or easily as you might need to. It's one reason I don't much like hub motors in front wheels, especially large-diameter ones (though they're not as bad as it could be, since the mass isn't at the rim).<br /><br />Of course, if the rim is really so heavy that gyroscopic action is significantly more than typical, it's probably so heavy that power requirements for starting up and stopping are high enough to put my worries elsewhere. ;-)M.E.https://www.blogger.com/profile/15375034485988839284noreply@blogger.comtag:blogger.com,1999:blog-6231841547435511043.post-69590536950918924652009-06-18T07:25:04.227-07:002009-06-18T07:25:04.227-07:00Indeed about the ring gear. It would probably hav...Indeed about the ring gear. It would probably have to be a material other than metal. But even that could get a bit heavy. The upside is that it should keep the bike balanced better do to gyroscopic action.<br /><br />I have some flats that simply seemed resistant to the patch staying sealed. It seemed to be related to the particular rubber composition of the inner tube. The last flat that I fixed with the Slime brand patch kit seemed to stick really well, though the inner tube is not that problematic one. --JoeJoehttp://tech.groups.yahoo.com/group/switchmode/noreply@blogger.comtag:blogger.com,1999:blog-6231841547435511043.post-74781102632492652592009-06-17T23:00:08.946-07:002009-06-17T23:00:08.946-07:00Re: controller; I have a brushed controller chip (...Re: controller; I have a brushed controller chip (UC3637) I already started building into a controller prototype, based on it's appnote. I thought I would finish it today, but the flat tire problem came back again, so I just yanked all the motor and batteries off the bike (around 60 pounds) and repatched it, which took the rest of my time today.<br /><br /><br /><br />Re: ring gear on rim, I've got a post sometime back (probably 2007 or early 2008) that I thought of something like that, to have a kind of hub motor but with a planetary gear arrangement. After some discussion and thinking, it's simply too much mass to deal with in the wheel, as frequently as I'd be spinning it up and down in traffic. <br /><br />Braking the extra mass would wear the brakes more, and the rim, and might even require disc brakes instead of rim brakes to do it quickly enough. <br /><br />Accelerating the extra mass would use up extra power every time, and require higher currents during that time. <br /><br />Engineering the ring gear itself is also beyond my machining capabilites, and probably would be for some time.<br /><br />It's not necessarily a bad idea, but it has a lot of gotchas that have to be dealt with. It's probably why Neodymics didn't end up building their design of motor and batteries all inside a wheel, to be driven similarly. :-)M.E.https://www.blogger.com/profile/15375034485988839284noreply@blogger.comtag:blogger.com,1999:blog-6231841547435511043.post-70820665818906798972009-06-17T03:15:07.971-07:002009-06-17T03:15:07.971-07:00Mike, I thought of a possible way to make a drive ...Mike, I thought of a possible way to make a drive assy that uses a ring gear that attaches to the underside of the wheel rim. Then the motor has a meshing drive gear. The material of the ring gear could be a problem. --Joe<br /><br />PS. no need to post this Off Topic message.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6231841547435511043.post-23988252366155966042009-06-17T02:59:33.207-07:002009-06-17T02:59:33.207-07:00Hi Mike. Since you have a brushed system, you can...Hi Mike. Since you have a brushed system, you can go simpler than converting a brushless controller. I have a simpler one I constructed on the free simulator, LTspice, in the files of my group. Ah, post took!Anonymousnoreply@blogger.com