Search found 10576 matches

by spinningmagnets
Oct 15 2019 10:45am
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 41
Views: 841

Re: Why not comfort bikes?

My most-ridden ebike is an Electra cruiser. I trimmed an inch off of the top of the seat-tube, and then switched to a Suntour NCX, which is shorter than the Thudbuster by one inch. I liked the long-travel Thudbuster (LT), but it was a bit tall. I would have gladly kept it if there were no other opti...
by spinningmagnets
Oct 15 2019 10:38am
Forum: General Discussion
Topic: Active energy transfer balancing
Replies: 14
Views: 842

Re: Active energy transfer balancing

Bump, to mark this thread. I like this idea. Tesla, Chevy Volt, and Nissan Leaf charge to 4.05V per cell. Doing that helps the cells last longer, and also provides a safety margin. That leaves a need for some way to balance the cells. Equalizing seems like a reliable way that has no failure mode whe...
by spinningmagnets
Oct 14 2019 6:19am
Forum: E-Bike General Discussion
Topic: Why not comfort bikes?
Replies: 41
Views: 841

Re: Why not comfort bikes?

Why not both? I have a Cruiser frame with a BBSHD. It's what I ride most often. It has fat tires and a Suntour NCX seat-post which works well. It runs very quietly. I normally cruise around at around 20-MPH, but I want a 30-MPH capability for when I want to get away from traffic. If I was frequently...
by spinningmagnets
Oct 13 2019 6:01am
Forum: E-Vehicles General Discussion
Topic: Can EVs survive without subsidies ?
Replies: 11
Views: 218

Re: Can EVs survive without subsidies ?

When Tesla offered an 8-year warranty on their battery pack (the battery would retain at least 80% of its rated range during the 8 years), Many people expressed scepticism, because we all have used cordless drills and laptops where the battery did not last 8 years. Because of their battery research,...
by spinningmagnets
Oct 06 2019 7:06am
Forum: Items for Sale - New
Topic: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China
Replies: 1263
Views: 222624

Re: QS MOTOR,0.5-14kW Electric Hub Motor Manufacture China

What is the most powerful motor you make? Some of QS's earliest products were very fat and powerful hubmotors made to convert 2-stroke scooters into electric, and then they have supplied factory-electric scooters and motorcycles for many years. http://www.qs-motor.com/product-catagory/e-scooter-hub...
by spinningmagnets
Oct 04 2019 11:34am
Forum: General Discussion
Topic: White putty used in battery packs?
Replies: 11
Views: 297

Re: White putty used in battery packs?

Dow Silastic, or a cheap copy of that.

It's a "silicone" that stays "elastic" after it dries.
by spinningmagnets
Sep 30 2019 4:57pm
Forum: Battery Technology
Topic: What Electric Vehicles are using 18650's?
Replies: 6
Views: 337

Re: What Electric Vehicles are using 18650's?

Before Alta Motorcycles went out of business, they used 18650s. Sure Ron uses 18650s.

Zero motorcycles has been using flat pouch cells for several years now.

Index of EV battery packs
viewtopic.php?f=14&t=89680
by spinningmagnets
Sep 27 2019 9:57pm
Forum: Motor Technology
Topic: MagnaChip new 100V mosfet
Replies: 0
Views: 171

MagnaChip new 100V mosfet

"MagnaChip Targets Fast-Growing e-Bike Market with High-Performance MOSFET" https://www.semiconductor-digest.com/2019/09/24/magnachip-targets-fast-growing-e-bike-market-with-high-performance-mosfet/ ...a 100V Mid-Voltage MOSFET with a new thermal package (“M2PAK-7P”)...achieves a best-in-class therm...
by spinningmagnets
Sep 27 2019 7:28pm
Forum: Battery Technology
Topic: My excellent adventure through some battery builds
Replies: 181
Views: 25137

Re: My excellent adventure through some battery builds

Thanks for posting those details, EG. The kWeld can use an input of 3V-30V, but the max input for the kCap is 8.2V, which the designer determined in his humble opinion is the optimum balance between volts and the amps/timing. Of course the kWeld still works with a 12V car battery, or a high-amp 3S L...
by spinningmagnets
Sep 24 2019 4:09pm
Forum: Items for Sale - Used
Topic: Tesla Model 3 red color 2019
Replies: 12
Views: 536

Re: Tesla Model 3 red color 2019

The price in US dollars is $19.840 (at current USD=EU conversion)

I suspect that there is something very wrong with this vehicle, or...this is a scam.
by spinningmagnets
Sep 22 2019 7:55pm
Forum: E-Bike Technical
Topic: Edge 1,500 watt motor ( crap) !!!
Replies: 2
Views: 200

Re: Edge 1,500 watt motor ( crap) !!!

"Very good magnet bonding epoxy" (bigmoose, Doctorbass)
viewtopic.php?t=27270
by spinningmagnets
Sep 22 2019 4:33pm
Forum: Motor Technology
Topic: magnets held without glue?
Replies: 16
Views: 448

Re: magnets held without glue?

I would recommend that you do a quick search of Interior Permanent Magnet / IPM (compared to the common surface mounted magnets) Those designs are useful, especially for a motor with high RPMs...
by spinningmagnets
Sep 21 2019 12:24pm
Forum: EV Business World
Topic: Tesla Model 3
Replies: 1092
Views: 69197

Re: Tesla Model 3

“can achieve 7:20”...WTF does that mean?
This claim means that they believe the newest Model-S can run one full lap of the Nürburgring track in 7 minutes, 20 seconds.

https://en.wikipedia.org/wiki/N%C3%BCrburgring
by spinningmagnets
Sep 18 2019 11:16am
Forum: E-Vehicles General Discussion
Topic: Taycan video with some useful information
Replies: 31
Views: 881

Re: Taycan video with some useful information

When you double the amps, but only get 10% more power, I suspect the motor was at the point of saturation. After magnetic saturation is reached, I'm told that additional amps above that will add some power, but...it adds only a small amount of power, in exchange for a lot of waste-heat. I believe th...
by spinningmagnets
Sep 17 2019 4:48pm
Forum: General Discussion
Topic: Legends dropping like flies
Replies: 274
Views: 34862

Re: Legends dropping like flies

Eddie Money, dead at 70 on Sept 13, 2019. Esophageal cancer

https://youtu.be/5FtHhUDo-08, Two Tickets to Paradise

by spinningmagnets
Sep 16 2019 5:24pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: E-motorcycle conversion build index
Replies: 4
Views: 271

E-motorcycle conversion build index

This thread will be a place to provide a list of builds, so anyone who is curious about E-motorcycles can find out what motors, controllers, and batteries are most often used. In order to keep this thread concise, the rules are: Each post is allowed a title, one link to the build thread, and one pic...
by spinningmagnets
Sep 16 2019 8:25am
Forum: E-Bike General Discussion
Topic: eBikes seen on a road trip
Replies: 6
Views: 242

Re: eBikes seen on a road trip

Years ago, I was at a snow-skiing resort, and someone had a sports magazine from the 1920's. They had it out for anyone to read, and this particular issue had an article about how a few snow-ski resorts had installed lifts, and the controversy. I hadn't thought about it before, but...how did skiers ...
by spinningmagnets
Sep 15 2019 9:50pm
Forum: General Discussion
Topic: Legends dropping like flies
Replies: 274
Views: 34862

Re: Legends dropping like flies

Rick Ocasek, lead singer for "The Cars", dead at 75...

https://www.youtube.com/watch?v=Z5-rdr0qhWk
by spinningmagnets
Sep 15 2019 8:41pm
Forum: E-Vehicles General Discussion
Topic: Electric Dirtbike
Replies: 17
Views: 954

Re: Electric Dirtbike

I have not assembled the battery pack yet
I may be able to be helpful in this area. Lets chat in PM's and you can decide on the course of action you will go in.
by spinningmagnets
Sep 15 2019 3:39pm
Forum: General Discussion
Topic: Epic fail- tried to pull out a tree stump, dug it out in 45 min- pulse 144
Replies: 30
Views: 842

Re: Epic fail- tried to pull out a tree stump, tried using chain saw

First, google "Dakota fire pit", and read enough to thoroughly understand it. Next, drill a 1/2-inch hole down the center of the stump to form the "fire hole". Then, drill another hole off to the side at about a 45 degree angle in order to supply fresh air to the bottom of the fire-hole. Heat rises,...
by spinningmagnets
Sep 14 2019 1:50pm
Forum: E-Vehicles General Discussion
Topic: Electric Dirtbike
Replies: 17
Views: 954

Re: Electric Dirtbike

Have you assembled the battery pack yet?