Search found 175 matches

by SpeedEBikes
Jul 22, 2015 11:57 pm
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1092
Views: 147165

Re: Compact Field Oriented Controller, ASI + Grin, limited r

justin_le wrote:Hey guys so this has been quite a riot. A handful of the name suggestions here were already on our whiteboard, but quite a few are quite new and made the cut.
Whatever it's named it will still be a "nice FOC".
by SpeedEBikes
Jan 09, 2015 9:21 am
Forum: General Discussion
Topic: Anyone done business with UUMotor?
Replies: 12
Views: 1496

Re: Anyone done business with UUMotor?

Tony has responded requesting photos and offering to make it right sending replacements if needed. If they replace the motor with the wires damaged in shipping I'll be happy. It also is the one that had options for tire choice and was sent with an oversized knobby tire when a smooth street tire was ...
by SpeedEBikes
Jan 09, 2015 6:42 am
Forum: General Discussion
Topic: Anyone done business with UUMotor?
Replies: 12
Views: 1496

Re: Anyone done business with UUMotor?

How did things go with uumotor? Tony answers my inquiries quickly and has an oddball motor and wheel for my E Scooter. It took them until 3 days ago to fill and ship the order, but due to the premium shipping via DHL air I received the order yesterday. Initial impression was not good. Some of the i...
by SpeedEBikes
Dec 21, 2014 12:01 am
Forum: General Discussion
Topic: Anyone done business with UUMotor?
Replies: 12
Views: 1496

Re: Anyone done business with UUMotor?

Some of those tiny wheel scooter hub motors could be fun to play with. Stuff like powering up a garden cart, or a lazy boy chair. I've been building motorized buckets, such as this one http://endless-sphere.com/forums/viewtopic.php?f=12&t=65345 I got a bit carried away in the pursuit of performance...
by SpeedEBikes
Dec 18, 2014 8:06 pm
Forum: General Discussion
Topic: Anyone done business with UUMotor?
Replies: 12
Views: 1496

Re: Anyone done business with UUMotor?

Against my better judgement I went ahead and did a sample order of 4 different motors. The prices are decent but everything else about the website and their approach to sales seems unprofessional and tacky. But they offer a greater variety of motors than I have seen from other vendors and in particu...
by SpeedEBikes
Dec 16, 2014 2:08 am
Forum: General Discussion
Topic: Anyone done business with UUMotor?
Replies: 12
Views: 1496

Re: Anyone done business with UUMotor?

UUMotor has answered my last email confirming the two different versions of the motor use the same magnets and windings but still did not say what if anything is actually different about them.
by SpeedEBikes
Dec 15, 2014 1:55 am
Forum: General Discussion
Topic: What can I use for a load to test a power supply?
Replies: 5
Views: 533

Re: What can I use for a load to test a power supply?

Many things will run on either AC or DC. Incandescent light bulbs are essentially just resistors. They actually run better on DC as the steady current doesn't stress the filament as much. Compact flourescents typically work too. And many other electronic devices. And many motors too. Many of the dev...
by SpeedEBikes
Dec 14, 2014 1:57 pm
Forum: General Discussion
Topic: Anyone done business with UUMotor?
Replies: 12
Views: 1496

Re: Anyone done business with UUMotor?

A voltage rating could avoid insulation breakdown of the wiring or protect voltage sensitive components such as an internal capacitor in a single phase ac motor. Or it could serve as an rpm limit. But in this case I'd expect such limits to be far higher. For a typical ebike motor limited by overheat...
by SpeedEBikes
Dec 13, 2014 6:10 pm
Forum: General Discussion
Topic: Anyone done business with UUMotor?
Replies: 12
Views: 1496

Re: Anyone done business with UUMotor?

They have separate pages for motors, controllers and kits, so I'm assuming the motor pages are for motors without a controller. Almost every motor they sell comes in multiple power versions but they only give a single performance chart per motor, not for each version. The motor I enquired about was ...
by SpeedEBikes
Dec 13, 2014 3:48 pm
Forum: Items Wanted
Topic: small DD motor
Replies: 14
Views: 1127

Re: small DD motor

A 9c or similar form clone is capable of higher power output then either the MAC or the Crystalyte 400 series. The typical weakness of 9c type motors is thin phase wires. It's possible to rewire with thicker phase wires or double up the thin ones and push the motor much harder but can be a pita as t...
by SpeedEBikes
Dec 13, 2014 3:46 pm
Forum: Items Wanted
Topic: small DD motor
Replies: 14
Views: 1127

Re: small DD motor

A 9c or similar form clone is capable of higher power output then either the MAC or the Crystalyte 400 series. The typical weakness of 9c type motors is thin phase wires. It's possible to rewire with thicker phase wires or double up the thin ones and push the motor much harder but can be a pita as t...
by SpeedEBikes
Dec 13, 2014 2:56 pm
Forum: General Discussion
Topic: What can I use for a load to test a power supply?
Replies: 5
Views: 533

Re: What can I use for a load to test a power supply?

amperage = voltage / resistance

A fixed resistance load will only pull about 1/4 the current at 33 volts as it does at 120.

I'd be surprised if the AC switch would fail on that much lower a DC voltage.
by SpeedEBikes
Dec 13, 2014 2:33 pm
Forum: Items for Sale - New
Topic: Turnigy Wattmeter Barmount - v1.0. Beta testers needed!
Replies: 27
Views: 2598

Re: Turnigy Wattmeter Barmount - v1.0. Beta testers needed!

Where are you getting throttles for larger diameter bars?
by SpeedEBikes
Dec 13, 2014 2:02 pm
Forum: General Discussion
Topic: Motor quieter at 120% throttle - Why?
Replies: 7
Views: 511

Re: Motor quieter at 120% throttle - Why?

How does this controller go beyond 100% throttle? Does it boost the voltage? If so, do you know how efficiently?
by SpeedEBikes
Dec 13, 2014 1:53 pm
Forum: General Discussion
Topic: Anyone done business with UUMotor?
Replies: 12
Views: 1496

Anyone done business with UUMotor?

I'm interested in some of the BLDC hub motors offered at http://www.uumotor.com/store. Each of their motors is offered in multiple versions listed by increasing voltage and increasing price. I sent them an enquiry asking what was different between two versions of a motor to give them different volta...
by SpeedEBikes
Dec 12, 2014 2:32 am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Badsey Cruiser rebuid/modification
Replies: 7
Views: 889

Re: Badsey Cruiser rebuid/modification

The wheels and tires are go kart parts. The body work they did themselves in fiberglass. Most of the other parts, motor, controller, batteries, etc. are off the shelf and if you can't find an exact replacement it shouldn't be too hard to find a decent substitute. Most of the aluminum and steel frame...
by SpeedEBikes
Dec 12, 2014 1:39 am
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My mobility scooter
Replies: 3
Views: 1191

Re: My mobility scooter

Icewrench, the disc brake side is laced single cross and the other side is zero cross. Wasn't planned just happened to be the only way I could lace it up reasonably centered with the spoke lengths I happened to have on hand. The scooter reponds great to body english. Leaning helps keep the wheels pl...
by SpeedEBikes
Dec 11, 2014 10:25 pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: My mobility scooter
Replies: 3
Views: 1191

My mobility scooter

I'm losing my ability to walk and wanted a scooter I could ride about the house and around town. Here's what I came up with. BS3 frame small.jpg BS3small.JPG Going for more welding gas bs3 gas.JPG motor, MAC 6T w/ 12 fet Infineon controller bought from cell_man/EM3EV with 16x3" tire battery, Turnigy...
by SpeedEBikes
Dec 11, 2014 9:18 pm
Forum: Items Wanted
Topic: small DD motor
Replies: 14
Views: 1127

Re: small DD motor

If you are killing MACs you'll be killing a Crystalyte 407 too. Just differently. Crystalyte 400 series burn easily at 2000 watts input. If you overheat it fast you'll burn the windings, typically near the junction to the external phase wires. If you overheat it gradually the epoxy holding the magne...
by SpeedEBikes
Dec 04, 2014 12:10 pm
Forum: Items Wanted
Topic: small DD motor
Replies: 14
Views: 1127

Re: small DD motor

My guess is you didn't wreck the MACs, just the plastic gears inside. The gears are fairly inexpensive and surprisingly easy to replace. One source for the gears is Paul at EM3ev. DD motors are more robust but you are unlikely to find one in the same size as a MAC that can match its performance. If ...
by SpeedEBikes
May 03, 2013 11:36 am
Forum: E-Bike Technical
Topic: GEAR MATERIAL
Replies: 18
Views: 1480

Re: GEAR MATERIAL

I've got a cute q100 (ananda) geared hub motor and the gears are starting to fail. Searching these forums and the rest of the net it appears that replacement gears aren't available and many people have stripped gears on these motors. I was considering trying to get a replacement set of gears made fr...
by SpeedEBikes
Sep 09, 2012 10:50 pm
Forum: Items Wanted
Topic: seeking high quality wheel bearings for hub motors
Replies: 2
Views: 418

Re: seeking high quality wheel bearings for hub motors

I opened up a Crystalyte 400 series motor and measured a bearing and it is indeed 12 mm thick.

Here's a reasonable priced bearing that I expect is a bit higher quality than the stock bearings.
http://www.vxb.com/page/bearings/PROD/N ... gs/Kit9679
by SpeedEBikes
Sep 07, 2012 7:01 pm
Forum: Items Wanted
Topic: seeking high quality wheel bearings for hub motors
Replies: 2
Views: 418

seeking high quality wheel bearings for hub motors

I built an electric bike for someone who uses it extremely hard and has gone through 2 sets of stock bearings in 2 years. Hoping to find bearings that will last longer. The bearings are for a Crystalyte 40x series motor (aka roadrunner). I know the bearing is 42 mm od, 20 mm bore but I don't know th...
by SpeedEBikes
Apr 19, 2012 1:23 pm
Forum: Items for Sale - New
Topic: Complete Hobby King Lipo Protection Kit
Replies: 358
Views: 38105

Re: Complete Hobby King Lipo Protection Kit

Thanks, I just finished reading 12 pages of this thread (been out of the sphere for a while) and didn't see it mentioned. I've been relying on cell log 8s to provide a programmable high cutoff and low alarm for per cell protection. The biggest downside is a bit of effort to rewire each unit with a m...
by SpeedEBikes
Apr 19, 2012 11:58 am
Forum: Items for Sale - New
Topic: Complete Hobby King Lipo Protection Kit
Replies: 358
Views: 38105

Re: Complete Hobby King Lipo Protection Kit

Can you explain the reasoning behind the cutoff threshholds of 3.0V LVC and 4.29V HVC? I'm guessing the device is intended as a last resort fail safe to prevent destruction of the pack rather than the regular means for terminating either charge or discharge, Are the cutoffs modifiable? I'd expect a ...