Search found 2138 matches

by billvon
Jun 12 2019 1:36pm
Forum: Motor Technology
Topic: Will Statorade make a hub motor quieter?
Replies: 3
Views: 203

Re: Will Statorade make a hub motor quieter?

Granted, it's pretty quiet as it is, but of course we have to pursue perfection for some stupid reason, right? Why would that make it quieter? Statorade fills in a little bit of the area between stator and rotor, but those aren't structures that touch anyway. And there's not enough to damp resonanc...
by billvon
Jun 12 2019 11:16am
Forum: Battery Technology
Topic: Build a mini USV/UPS
Replies: 42
Views: 1002

Re: Build a mini USV/UPS

Use LiFePO4. They don't mind staying at close to full charge all the time.
by billvon
Jun 12 2019 11:00am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 4674
Views: 171770

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Some bad news this morning: ================= Scorching weather kicks off wildfire season JUN 9, 2019 CBS News A heatwave in the western US marked an early start to the wildfire season. Evacuations are already underway in some communities. ================== And some good news: ==================== ...
by billvon
Jun 11 2019 5:38pm
Forum: Alternative Energy
Topic: Build a 5m rotor diameter
Replies: 11
Views: 489

Re: Build a 5m rotor diameter

jlcortex wrote:
Jun 11 2019 4:16pm
My tower will not 50m so I estimate near 700w average, about 6MWh/year
I get 200w average, assuming 8mph wind average.

Tower minimum height is going to be 12.5 meters plus the height of the tallest object within 200 meters of the turbine.
by billvon
Jun 10 2019 9:36pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 4674
Views: 171770

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Summer is here and the air pollution in my town is getting bad the news channels warn about filling up ice machines and cutting grass because of the ozone is bad but they never talk about not driving the cars. Many cities and states are now using HOV lanes and congestion pricing as a way to reduce ...
by billvon
Jun 10 2019 9:33pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 4674
Views: 171770

Re: Wind and Solar vs Coal, Gasoline, Nuclear

I was comparing national Economic systems, not individual Company Management practices ! I was giving you examples of where the free market is NOT self regulating without external regulation. Fortunately, national economic systems adopt regulations as a result of abuses, and the abuses are thereby ...
by billvon
Jun 10 2019 4:18pm
Forum: Alternative Energy
Topic: Build a 5m rotor diameter
Replies: 11
Views: 489

Re: Build a 5m rotor diameter

A 5m rotor can get more than 5000W but I would like to optimize for slow wind, about 6m/s, I am calculating 2500W or so. I am thinking to build blades in wood and use a multiplied hub motor as generator. A 5m diameter rotor, in 6m/s wind, is going to get 2500 watts at 100% efficiency. At more reaso...
by billvon
Jun 10 2019 2:13pm
Forum: Motor Technology
Topic: Can Flux Weakening mess with the hall sensors?
Replies: 7
Views: 298

Re: Can Flux Weakening mess with the hall sensors?

I recently started to have a weird issue with my motorbike. Sometimes, when running at high speeds, the bike will suddently have what feels like a big burst of regen braking, then the controller would cutoff. . . . I'm pretty sure it is not a motor phase short, because it happens quite rarely and a...
by billvon
Jun 10 2019 1:28pm
Forum: E-Bike Technical
Topic: hybrid power w charging via regen brakes ?
Replies: 4
Views: 269

Re: hybrid power w charging via regen brakes ?

I'm thinking of increasing my range to more than my current 60km by building a bike with my 9C hub and one of those 2 stroke bike engine kits. I often travel to areas where it woudn't be prudent to use the noisy smelly gas engine so there I can use the electric. My idea is to be able to charge the ...
by billvon
Jun 10 2019 11:53am
Forum: Battery Technology
Topic: Tesla pack disassembly problem
Replies: 7
Views: 352

Re: Tesla pack disassembly problem

If you're just looking to dissolve any final bits, clean the cells up, methyl-ethyl-ketone (Butanone) will normally take it off but i think looking at time vs effort economy, as above, unless you're dead set on using those cells, your best option would be to use the pack for some kind of home/RV ba...
by billvon
Jun 10 2019 10:17am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 4674
Views: 171770

Re: Wind and Solar vs Coal, Gasoline, Nuclear

That is how the consumer society works, the more you consume, the more manufacturing flourishes and the economy grows. And the environment dies. Think East Germany, before unification, or China before they discovered their own “hybrid Capitalist/Dictatorship. The “free Market” is self regulating. N...
by billvon
Jun 09 2019 10:57pm
Forum: E-Vehicles General Discussion
Topic: Tesla expects global shortage of electric vehicle battery minerals
Replies: 25
Views: 986

Re: Tesla expects global shortage of electric vehicle battery minerals

People have been predicting that "the end is near" since they learned how to speak. Yep. I remember Paul Erlich claiming that "the battle to feed all of humanity is over. In the 1970s hundreds of millions of people will starve to death in spite of any crash programs embarked upon now. At this late ...
by billvon
Jun 09 2019 10:39pm
Forum: EV Business World
Topic: Tesla Model 3
Replies: 950
Views: 58562

Re: Tesla Model 3

I had this thing they call "L1" on a 2015 Chevy Volt By default it would draw less than 15A... To get it to draw more I would have to command it to... Yeah. 12A is standard for L1; that way you are drawing 80% of a 15 amp circuit (limit for long term draw.) You can futz with the pilot signal to "te...
by billvon
Jun 07 2019 1:53pm
Forum: E-Bike General Discussion
Topic: Illegal bike confiscation possibilities by police not up to date on newer laws
Replies: 67
Views: 1916

Re: Illegal bike confiscation possibilities by police not up to date on newer laws

While in jail a policeman brought me a paper to sign that I agreed to forfeit my Urb-E because it is the law for 3 DUI's in a lifetime in Michigan. To make a long story shorter, on January 22th or about then I was sentenced by the judge. I was given a light sentence as I was not driving an automobi...
by billvon
Jun 07 2019 1:15pm
Forum: General Discussion
Topic: EMI/RFI Dangerous?
Replies: 13
Views: 549

Re: EMI/RFI Dangerous?

What you could do to reduce the emissions is using shilded wires for the phases and twisting them. Those orange colored EV cables are normally shilded so i would use them. Routing all the wires through a metal tube will also reduce noise. Also add capacitance. That will cut down on higher frequency...
by billvon
Jun 06 2019 3:41pm
Forum: General Discussion
Topic: EMI/RFI Dangerous?
Replies: 13
Views: 549

Re: EMI/RFI Dangerous?

What if.. I told you... i have medical device such as pacemaker or other devices on my body. Would the sun etc give med more EMI/RFI/EMF/EMP radiaton than my gokart? The sun gives you more damaging radiation than anything else by orders of magnitude. (Unless you live in Chernobyl or something . . ....
by billvon
Jun 06 2019 2:30pm
Forum: E-Bike Build Threads / Photos & Video
Topic: GrayK's RC Mid-Drive (Deathbike)
Replies: 8
Views: 475

Re: GrayK's RC Mid-Drive (Deathbike)

GrayK wrote:
Jun 06 2019 3:11am
I put a torque curve on the motor controller for that reason. It ramps up the power from 10% to 100% in a given time independent from the position of the throttle.
That doesn't sound like it limits the torque, just reduces the ramp rate.
by billvon
Jun 05 2019 9:46pm
Forum: General Discussion
Topic: EMI/RFI Dangerous?
Replies: 13
Views: 549

Re: EMI/RFI Dangerous?

But none of that risk comes from EMI/RFI/EMF/EMP. While high EMF has a known vector for concern in small children, no causal link has ever been found. there is no vector of concern for older children or adults. In English, that means scientists think it might be possible that small children are at ...
by billvon
Jun 05 2019 5:48pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Around the world on a solar ebike
Replies: 222
Views: 14647

Re: Around the world on a solar ebike

fechter wrote:
May 21 2019 12:52pm
I remember the behemoth bike. Even with 105 gears, I can't imaging going up any kind of hill with that much weight.
Heck, Steve could barely imagine it. It's one of the reasons he retired it and moved on to sailboats (free energy.)
by billvon
Jun 04 2019 5:10pm
Forum: E-Bike General Discussion
Topic: Illegal bike confiscation possibilities by police not up to date on newer laws
Replies: 67
Views: 1916

Re: Illegal bike confiscation possibilities by police not up to date on newer laws

RunForTheHills wrote:
Jun 04 2019 4:53pm
Actually, if it did have a floorboard it would qualify as an electric skateboard
If it was designed to be stood on while riding. A Vespa style scooter with a floorboard and a seat would seem to not qualify.
by billvon
Jun 04 2019 4:43pm
Forum: E-Bike Build Threads / Photos & Video
Topic: High performance & durability Cannondale Semi Recumbent
Replies: 148
Views: 6436

Re: High performance & durability Cannondale Semi Recumbent

neptronix wrote:
Jun 04 2019 11:17am
Of course i'd rather have some giant high density 15-20AH prismatic cells so that one can just bolt together and/or service a pack easily.. but those don't exist..
If you can live with the weight, you could go to 45ah pouch cells:

https://www.ebay.com/i/223290104145?chn=ps
by billvon
Jun 04 2019 4:37pm
Forum: E-Bike General Discussion
Topic: Illegal bike confiscation possibilities by police not up to date on newer laws
Replies: 67
Views: 1916

Re: Illegal bike confiscation possibilities by police not up to date on newer laws

Talon wrote:
Jun 04 2019 4:33pm
Like I mentioned earlier. I don't have a valid driver's license. Almost every Moped that I see in Michigan has a "floor board". My URB-E does NOT have a floor board. Does that not make a Moped a "scooter"??
I don't think so. I didn't see any exceptions to the law for floorboards.
by billvon
Jun 04 2019 4:16pm
Forum: E-Bike General Discussion
Topic: Illegal bike confiscation possibilities by police not up to date on newer laws
Replies: 67
Views: 1916

Re: Illegal bike confiscation possibilities by police not up to date on newer laws

I think it's a moped in California. Good catch. In which case he'd need to register it (one time only) have a driver's license with a motorcycle endorsement and use a helmet to be legal. If it qualifies as a moped in Michigan, then he'd need a driver's license or a moped license, and a registration...
by billvon
Jun 04 2019 3:55pm
Forum: E-Bike General Discussion
Topic: Illegal bike confiscation possibilities by police not up to date on newer laws
Replies: 67
Views: 1916

Re: Illegal bike confiscation possibilities by police not up to date on newer laws

Interesting, but the URB-E doesn't even fit that definition of a low-speed electric bicycle as it also requires operable pedals. And that definition is meaningless for the purpose of determining driver's license, insurance, and registration requirements in each state. Agreed. Unfortunately, the res...
by billvon
Jun 04 2019 3:50pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 4674
Views: 171770

Re: Wind and Solar vs Coal, Gasoline, Nuclear

jimw1960 wrote:
Jun 04 2019 3:05pm
So, it's pretty clear these gas turbine generators come in different flavors and some a specifically designed to have a lot of starts and stops.
Yep. We have two of them. They've worked great for us over the years.