Search found 2305 matches

by billvon
Oct 21 2019 7:05pm
Forum: E-Vehicles General Discussion
Topic: Solar challenge lead car burns
Replies: 5
Views: 178

Re: Solar challenge lead car burns

Hummina Shadeeba wrote:
Oct 21 2019 3:54pm
These guys design the whole thing wonderfully but can’t figure how not to catch on fire? What causes the fires?
Rapidly designed (or missing) BMSes. Pushing charge voltages. Mechanical damage to the packs. Too-fast charges and discharges. The usual.
by billvon
Oct 17 2019 4:06pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5284
Views: 211849

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Toorbough ULL-Zeveigh wrote:
Oct 17 2019 2:13pm
TheBeastie wrote:
Oct 14 2019 3:05am

Sarah is like a mini version of Al Gore,
it's funny how great minds warp along the same curve.
because that's my nickname for Gal Gore Greta.
Great minds discuss ideas; average minds discuss events; small minds discuss people.
by billvon
Oct 17 2019 12:51pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5284
Views: 211849

Re: Wind and Solar vs Coal, Gasoline, Nuclear

This is a debate between those who believe that “tech-fixes” can solve the problems without radical change from a system committed to affluence and growth, and those who argue that only radical change to a very different, post consumer-capitalist society can solve the big problems. As always, the s...
by billvon
Oct 17 2019 9:28am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5284
Views: 211849

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Through out the thread I've heard some crazy comments and it's challenged me to learn the basics problem we have not all will use scientific sources to gather an understanding or the data is misinterpreted to 12 years till the end as we know it when it's more like we are not sure exactly the time s...
by billvon
Oct 15 2019 5:42pm
Forum: E-Vehicles General Discussion
Topic: Can EVs survive without subsidies ?
Replies: 12
Views: 263

Re: Can EVs survive without subsidies ?

The desired outcome is that we end up with the companies that produce the best vehicles at a price people are willing to pay. That's right. And as long as you capture all the of the actual cost of ownership in the sales price, that works. When you don't, you distort the market. Some examples here a...
by billvon
Oct 15 2019 4:53pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5284
Views: 211849

Re: Wind and Solar vs Coal, Gasoline, Nuclear

jimw1960 wrote:
Oct 15 2019 4:40pm
Save your effort, Bill. Nothing will convince this guy to move away from the denier blog-o-sphere and to consider actual peer-reviewed scientific data and studies.
I know; denial is his religion. But I figure other people are reading.
by billvon
Oct 15 2019 11:09am
Forum: General Discussion
Topic: Crash Thread - lucky
Replies: 31
Views: 1246

Re: Crash Thread - lucky

Sidwalks are the most dangerous place to ride. That's why they're called side walks not siderides. Not around here. Here it varies. On Mira Mesa Blvd, my most frequently used streed the bike lane is generally the safest place to ride, except for the half mile or so where it disappears. At that poin...
by billvon
Oct 15 2019 11:05am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5284
Views: 211849

Re: Wind and Solar vs Coal, Gasoline, Nuclear

What exactly are you whineing on about now jimmy ? Trends are “shyte” ? Are they. No. Your opinions, based on false claims, are shyte. Let's take one - lack of warming in the troposphere. That was disproven years ago. The upper troposphere IS warming due to greater energy transport in water vapor (...
by billvon
Oct 14 2019 10:54pm
Forum: Battery Technology
Topic: Safety of Charging Deeply Discharged Lithium Batteries.
Replies: 14
Views: 337

Re: Safety of Charging Deeply Discharged Lithium Batteries.

Here is a specific question: why it is common belief that a deeply discharged lithium battery is much more of a fire hazard than a brand new one? Because it is. That's why pretty much all consumer devices (think cellphones) have a trickle charge mode for when the cell is below about 3 volts - to re...
by billvon
Oct 14 2019 9:57pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5284
Views: 211849

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Says more about you than her. Great minds discuss ideas; average minds discuss events; small minds discuss people. I forget who said that. I use this as a metric when I am trying to decide at what level to discuss something. Is the guy I am talking to doubting the idea that climate change will make...
by billvon
Oct 14 2019 9:50pm
Forum: E-Bike Non-hub Motor Drives
Topic: Most quiet e-bike motor?
Replies: 21
Views: 738

Re: Most quiet e-bike motor?

By using a boost converter after the bridge rectifier, you're essentially lowering the forward voltage needed to get current flow through the rectifier diodes and thereby increasing the proportion of the generator's period during which current will flow. Yes. And I would add that since a boost conv...
by billvon
Oct 14 2019 4:24pm
Forum: E-Bike Non-hub Motor Drives
Topic: Most quiet e-bike motor?
Replies: 21
Views: 738

Re: Most quiet e-bike motor?

I'm a bit surprised the sides of my motor would amplify the harmonics that much, because they aren't that large. Right, but keep in mind that any membrane (even the side of a motor) is going to have a frequency it works best at. So you are hearing the frequencies that the structure is good at creat...
by billvon
Oct 13 2019 4:26pm
Forum: E-Bike Non-hub Motor Drives
Topic: Most quiet e-bike motor?
Replies: 21
Views: 738

Re: Most quiet e-bike motor?

watchdog_timer wrote:
Oct 10 2019 4:25am
I am simply rectifying the output using a full-wave bridge rectifier
That's your problem. The rectifiers provide a square wave "drive" (load) and cause harmonic noise. The noise is then amplified by the sides of the motor.
by billvon
Oct 13 2019 11:43am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5284
Views: 211849

Re: Wind and Solar vs Coal, Gasoline, Nuclear

jonescg wrote:
Oct 13 2019 8:51am
Yeah I'm all for innovation in renewable energy generation and dispatch, but solar thermal does not stack up.
I tend to agree. The only place it makes sense is as a booster to existing natural gas plants, where most of the physical plant is being built anyway.
by billvon
Oct 12 2019 11:54pm
Forum: E-Vehicles General Discussion
Topic: Can EVs survive without subsidies ?
Replies: 12
Views: 263

Re: Can EVs survive without subsidies ?

Advocates claim that EVs are far simpler machines than combustion engines. But the essential “engine” for both is similarly complicated. While the EV’s electric motor is simple, its battery is a half-a-ton electrochemical machine with thousands of parts and welds, along with wiring, electronics, an...
by billvon
Oct 12 2019 9:45pm
Forum: Battery Technology
Topic: Battery Selector 3-way Toggle Switch - Wiring Query
Replies: 3
Views: 82

Re: Battery Selector 3-way Toggle Switch - Wiring Query

OK, so all three negative wires all just glommed together? And that doesn't create a connection during the charge cycle? I really don't want to blow anything up. Any current flow needs a closed circuit. By opening the top of the circuit, no current can flow into the disconnected battery. Hmm, so tw...
by billvon
Oct 12 2019 9:05pm
Forum: Battery Technology
Topic: Battery Selector 3-way Toggle Switch - Wiring Query
Replies: 3
Views: 82

Re: Battery Selector 3-way Toggle Switch - Wiring Query

But what do I do with the negative wires? I've seen 'ground them to the bike frame' and I've seen 'connect them to each other' neither of which I am comfortable doing without one of you guys with the enormous brains explaining how it's safe/cool/functional. Just connect them together. BTW I'd go wi...
by billvon
Oct 11 2019 9:40pm
Forum: Battery Technology
Topic: Lithium variable voltage charger needed to 62v
Replies: 9
Views: 236

Re: Lithium variable voltage charger needed to 62v

This might not be what you are looking for, but i thought i would mention it. The cons are the fan is loud, its a boost converter so dc-dc only and power source must be a lower voltage than the battery, and it always defaults to setting 0. I have used this. It sucks. It's unstable and often will ra...
by billvon
Oct 11 2019 1:24pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5284
Views: 211849

Re: Wind and Solar vs Coal, Gasoline, Nuclear

TheBeastie wrote:
Oct 11 2019 8:06am
And while people are skiing in Australia on the longest snow season in history, on the other side of the world where it's supposed to be summer its now also getting the biggest earliest snowstorm in history.
How you know the climate is changing - snow in October is now big front page news.
by billvon
Oct 10 2019 10:29pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Pricing - 45mph cruise, 60mph top, 50 mile range (cruise speed)
Replies: 19
Views: 658

Re: Pricing - 45mph cruise, 60mph top, 50 mile range (cruise speed)

Or something like Meanwell HLG series LED PSUs, which autoswitch between those input voltages. Those are great, but they will not automatically cut back on power when 120 volts is present (as he wants.) You could use several in parallel and only connect all of them when 240V is available. You could...
by billvon
Oct 10 2019 10:04am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5284
Views: 211849

Re: Wind and Solar vs Coal, Gasoline, Nuclear

It does not matter where the words or thoughts came from.... It actually does. In the real world (not the Internet) the thoughts of a competent, experienced scientist on his field of study are actually more valid than similar thoughts from an angry Trump supporter who lives in his mom's basement. N...
by billvon
Oct 09 2019 10:28am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5284
Views: 211849

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Hillhater wrote:
Oct 09 2019 4:52am
CLIMATE MODELS ARE BASED ON FLAT EARTH ASSUMPTION !
You didn't read the article, did you. No wonder you remain ignorant of so much of the science - you don't even read it.
by billvon
Oct 09 2019 10:26am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 5284
Views: 211849

Re: Wind and Solar vs Coal, Gasoline, Nuclear

The dead simple stuff is also the low value stuff. Recycling lead batteries is 99% circular because of the very high value of lead, and the desire to keep toxic metals out of the environment. And because it's easy. You strip off the case and recycle the plastic. You remove the separators and recycl...
by billvon
Oct 07 2019 9:46pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Pricing - 45mph cruise, 60mph top, 50 mile range (cruise speed)
Replies: 19
Views: 658

Re: Pricing - 45mph cruise, 60mph top, 50 mile range (cruise speed)

yeah, I know its much lower specific energy density but that cycle life and high discharge/charge is enticing to make a bike from it To do a 60mph bike you are going to have to sacrifice pretty much every other spec. You'll be using li-ion of some form or another. only problem is where would you ev...
by billvon
Oct 07 2019 2:25pm
Forum: Alternative Energy
Topic: Need advice about cheap solar panels.
Replies: 2
Views: 147

Re: Need advice about cheap solar panels.

Martinel wrote:
Oct 07 2019 11:51am
What do residential solar panel systems typically cost?
About $3/watt.