Remote Living > Transportation
a few basic points about electric vehicles
dbcollen:
R/C has been brushless polyphase for quite some time now.
JW:
The reason I bring up the 3 phase on R/C cars is its the same for BEV and synergy drive. In these systems have an adjustable freq for speed control, example above 60HZ and much higher voltages. I am a ASE Master Tech(recertified) for over 22 years, also I am a ASE Advanced level Specialist. This technology is moving fast and as auto technicians were playing catch-up. I have a $2,000 course that I have to take just for hybrids...
SparWeb:
Jlsoaz,
Thank you for picking the subject back up. Agreed, it was time for a change of tone.
I'm not usually sure why such discussions bring up emotional reactions so easily. It's unlikely that one person driving one EV is any threat to anyone else in the world, therefore the emotions must be coming from somewhere else; just transferred to the discussion at hand, without rhyme or reason. OK Enough of that.
I'm looking forward to the day I can put a practical EV in my garage. My personal calculation of what is my best choice doesn't have much to do with the source of the electricity it uses. What I'm replacing - a fuel-burning ICE car - can easily be shown to pollute more. It hardly matters what information I selectively ignore - it always come out in the EV's favour. Actually, that car already exists - there are several to choose from - I just can't afford one yet, and my current vehicle is still purring along. In the past year I've tweaked my driving habits and use 10% less gasoline per day. Small victories...
There is no magic technology that will instantly transform the EV from the heavy metal machine it currently is into a fairy-dust driven chariot. We have chemical-electric storage cells, a thousand chemistries have been tried, and the lithium salts fit the bill. Those who think they know better can go into business for themselves and get rich if they can. Nobody is thrilled to see the salt lakes in South America produced by lithium mining, but I can point to just as many square miles of salted lakes and stripped forests north of me that produces my auto gasoline. To me it's NOT a good-vs-evil question. (Get off the emotional roller-coaster).
BTW, you may enjoy reading Paul Gipe's latest blog about his EV:
http://www.wind-works.org/cms/index.php?id=84&tx_ttnews%5Btt_news%5D=4917&cHash=b99978141ddae5f4dd82db42cc9bf1a2
JW,
Please forgive me for not following what you mean with R/C vehicles. I assume you don't mean hobby toys...
The DIY EV hobbyists have already given up on voltages below 100VDC, and DIY car conversions at 240VDC are common. Electric vehicles like the Tesla, Volt, Leaf etc are running traction batteries at 200-300 Volts and more, some reaching up to 500VDC! The polyphase drives are not necessarily 3-phase BLDC motors - some use induction motors. Some have very high motor pole counts corresponding to controller drive switching frequencies at 10-15 kHz. Battery packs are pretty much all Lithium based now, but there are still many choices of exact chemistry - Phosphates/Manganates/Iron - there are many out there. So the EV state of the art is still actually a very wide variety of technologies.
How specific will your courses get - are they manufacturer or vehicle model-specific courses, or general for "all hybrids"?
JW:
Hi Sparweb, yes the courses cover safety and potential fire. But also theory/practical of working operation.
When I was growing up we had remote control cars (high performance toys). I used to run mine on a carpet track and it was 12th scale. All the motors and NiCad batteries were purely DC.
Im going to post two links so that you can see how things have progressed since we were kids. Personally these type of power trains come from the same school of thought as full size EV's
https://www.banggood.com/Racerstar-4068-Brushless-Waterproof-Sensorless-Motor-2050KV-120A-ESC-For-18-Cars-RC-Car-Parts-p-1080770.html?gmcCountry=US¤cy=USD&createTmp=1&utm_source=googleshopping&utm_medium=cpc_ods&utm_content=heath&utm_campaign=pla-xu-us-pc&gclid=EAIaIQobChMIhKWyu56r2AIV1D2BCh3-EwRwEAQYAiABEgL7AvD_BwE&cur_warehouse=CN
https://www.amainhobbies.com/eflite-bl15-brushless-outrunner-motor-900kv-eflm4015c/p612348?utm_source=bing&utm_medium=cpc&utm_campaign=Shopping%20PLA%20-%20NEW%20STRUCTURE%20TEST&utm_term=1100008732089&utm_content=Brands
https://www.horizonhobby.com/KXSS0501?KPID=KXSS0501&CAWELAID=320011980000240607&CAGPSPN=pla&CAAGID=37619207031&CATCI=pla-382564220153&gclid=EAIaIQobChMIg9b1kKWr2AIViyWBCh37ygBcEAQYASABEgKfX_D_BwE
https://www.ebay.com/i/382228729806?chn=ps
george65:
--- Quote from: SparWeb on December 27, 2017, 05:17:38 PM ---
I'm not usually sure why such discussions bring up emotional reactions so easily.
--- End quote ---
The basis for starting this thread was an emotional one, and somewhat curious in the OP's attachment to the EV ideal.
It's just a technology, not someone's child or a person. When people start treatig it as such and feel they have to defend it's honour such as the motivation for this very thread, that's emotional.
There are BIG problems with EV's as a mainstream transport medium.
To deny or downplay every fact and aspect of that is about as emotional and biased as one can get and really turns a discussion into nothing more than a political rally to champion the chosen candidate.
Anyone want to make some bets that EV's in 20 years will still be a minor player in the personal and business transport market?
Going against the grain I know but there are a lot of factors that I believe are at play that will limit their popularity.
The current Hype being a fairly good indicator. Seen it with other things and the change that NEVER happened with those either.
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