# This would be a game-changer for EVs **URL:** \ **Category:** General Discussion\ **Created:** [February 3, 2022, 7:06pm UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267 "2022-02-03T19:06:53Z")\ **Posts on this page:** 17\ **Page:** 3
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [February 5, 2022, 3:35am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/41 "2022-02-05T03:35:03Z")
bumper cars anyone? ---
**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\ **Post date:** [February 5, 2022, 3:53am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/42 "2022-02-05T03:53:32Z")
![bc](https://global.discourse-cdn.com/cartalk/original/3X/4/3/43ebcdd50c7d9c7cc3145a28790522f1ff769d79.jpeg) ---
**Author:** ![Renegade](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@Renegade](https://community.cartalk.com/u/Renegade)\ **Post date:** [February 5, 2022, 3:58am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/43 "2022-02-05T03:58:25Z")
Looks like the bumper cars caught up with the modern times. 🙄 ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [February 5, 2022, 4:00am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/44 "2022-02-05T04:00:23Z")
this is his car on rails system. LOL ![image](https://global.discourse-cdn.com/cartalk/original/3X/c/a/ca3646f20448957f27c45363e333b7657fc99166.jpeg) ---
**Author:** ![Renegade](https://avatars.discourse-cdn.com/v4/letter/r/b4bc9f/32.png) [@Renegade](https://community.cartalk.com/u/Renegade)\ **Post date:** [February 5, 2022, 4:05am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/45 "2022-02-05T04:05:37Z")
> [@weekend-warrior](#): > > this is his car on rails system. LOL Good one. 😆 ---
**Author:** ![TheWonderful90s](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/thewonderful90s/32/29584_2.png) [@TheWonderful90s](https://community.cartalk.com/u/TheWonderful90s)\ **Post date:** [February 5, 2022, 4:42am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/46 "2022-02-05T04:42:38Z")
> [@VOLVO-V70](#): > > Me thinks the Snowman is off his meds or took too many of them Where were you when they got the idea to build the solar highway in France? The fact that you criticize my railroad track like power supply system, but not the outrageously expensive inductive power supply idea which probably couldn’t even be made to work, makes me think my idea could actually work! ---
**Author:** ![shadowfax](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/shadowfax/32/13026_2.png) [@shadowfax](https://community.cartalk.com/u/shadowfax)\ **Post date:** [February 5, 2022, 2:20pm UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/47 "2022-02-05T14:20:16Z")
Just because someone doesn’t criticize one unworkable thing doesn’t mean the other unworkable thing isn’t unworkable. 😉 As for government funding development of out-there ideas, I’m all for it. After all, if DARPA hadn’t funded the development of ARPAnet, it wouldn’t have evolved into the internet and we wouldn’t all be hanging out on a Saturday morning talking cars. Government funding led to the absurd idea of putting radio beacons in orbit and then using them to establish your location to within a few feet, and that enabled GPS which has been exceedingly handy to have. There are two major driving forces behind most of the modern convenience technology that we enjoy. Government, which funds wild projects like an interconnected network of computers and electronic space-beamed mapping, and porn, which funds an amazing number of technologies we enjoy. Government gave us the internet. Porn gave us _high speed_ internet. And VHS (one reason Betamax failed is that Sony didn’t allow smut on their format, whereas it was freely available on VHS), DVD players, streaming video, etc, because all the porn consumers wanted a way to consume it without having to go to a blue theater in the bad part of town, and then they wanted more convenient ways to consume it, and they wanted to consume it faster. And if you like being able to order things on Amazon and pay for them directly online rather than having to call a phone number or send in a check, you can thank porn for that too because people wanted an anonymized way to pay for their adult entertainment. Given the choice, I’d rather the government fund advanced development than the adult industry. 😉 ---
**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\ **Post date:** [February 5, 2022, 3:46pm UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/48 "2022-02-05T15:46:02Z")
I think you give a little too much credit to the porn industry. People complained that government should spend money on earth than space, space flight research gave us much of what we enjoy today. ---
**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\ **Post date:** [February 5, 2022, 9:49pm UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/49 "2022-02-05T21:49:42Z")
Just to clear up a couple of misconceptions here, the coils have to have an iron core or the excitation currents required would be way too high. A lot of the early wall warts (small plug in power supplies that power small electronic devices and chargers) had air cores and their efficiency was horrible. A 10 watt power supply would use an additional 7-12 watts when plugged in and nothing attached. When you did plug in something, say a 5 watt load, it would require an additional 5+ watts to deliver. So a 5 watt load would use 17+ watts when on, 7+ when off. China buys scrap core material from larger transformer manufacturers to make little core for these wall warts so they are more efficient now. Anytime a coil is energized, it needs excitation current even when there is no load attached. An induction stove top would use a lot more electricity if it didn’t have a variable voltage (temperature) and off switch like any electric stove top. When in off, no current is supplied to the core so it wont heat up any pan or pot no matter what it is made of. Once on, the current flow is minimal no matter the position of the temp control until a suitable pot is on top of he coil. To heat a pot, the pot or pan has to have a metal that can be magnetized. Non magnetic materials such as aluminum or stainless steel simply do not work. Cast Iron, Carbon Steel and pans or pots made with either disc of regular steel or iron in the bottom or are multi-ply with one layer of magnetic stainless steel. Magnetic stainless steel has chromium but no nickel in its composition, I.e. 18-0 SS vs 18-10 SS. Induction chargers are available to charge EV’s so the owner only has to park his vehicle over the coil, he or she does not have to plug it in. So in theory the charging roadway could work, but in practice, there are a LOT of obstacles in the way. It would probably cause a world wide shortage of copper. Then there are the issues like water intrusion, snow and ice, pothole damage just to start. But the biggest would be how would you meter the power consumed so the user could be charged for the power consumed. ---
**Author:** ![shadowfax](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/shadowfax/32/13026_2.png) [@shadowfax](https://community.cartalk.com/u/shadowfax)\ **Post date:** [February 5, 2022, 10:10pm UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/50 "2022-02-05T22:10:41Z")
> [@Purebred](#): > > I think you give a little too much credit to the ■■■■ industry. Well technically, it was the ■■■■ industry creating a product that people wanted to consume, anonymously and conveniently, that led to a greater societal demand for such things as on-demand video and high speed internet. ---
**Author:** ![TheWonderful90s](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/thewonderful90s/32/29584_2.png) [@TheWonderful90s](https://community.cartalk.com/u/TheWonderful90s)\ **Post date:** [February 6, 2022, 1:30am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/51 "2022-02-06T01:30:56Z")
> [@keith](#): > > To heat a pot, the pot or pan has to have a metal that can be magnetized. Non magnetic materials such as aluminum or stainless steel simply do not work. Thanks for commenting about this. I don’t know if you’re up for teaching me about transformer theory, but I don’t understand why an aluminum or copper pan won’t work on an induction stove top. I know that iron has good magnetic conductivity, and poor electrical conductivity, which makes it a good choice for use in a transformer core. It helps direct the magnetic field through the coils in the right way maximize efficiency. But the coils in a transformer are copper or aluminum. It is these coils that create the electricity on the secondary winding. Wouldn’t placing a coil of copper or aluminum wire on an induction cook top produce electricity? So wouldn’t a copper or aluminum pan induct electricity and since it is shorted out, create heat? A shorted winding in a transformer creates a lot of heat. Or is my understanding that the pan on an induction cook top acts like a transformer secondary winding incorrect? Does the induction cook top produce a magnetic field in such a way that it is not intended to induce Voltage, but rather create a changing magnetic field that heats iron the same way core loss creates heat in a transformer? ---
**Author:** ![MikeInNH](https://avatars.discourse-cdn.com/v4/letter/m/a587f6/32.png) [@MikeInNH](https://community.cartalk.com/u/MikeInNH)\ **Post date:** [February 6, 2022, 5:15am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/52 "2022-02-06T05:15:01Z")
> [@TheWonderful90s](#): > > I don’t know if you’re up for teaching me about transformer theory, but I don’t understand why an aluminum or copper pan won’t work on an induction stove top Because they don’t have magnetic properties. [What Cookware Works With Induction Cooktops? (thespruceeats.com)](https://www.thespruceeats.com/what-is-the-best-cookware-for-induction-cooktops-908920) ---
**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\ **Post date:** [February 6, 2022, 5:39am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/53 "2022-02-06T05:39:02Z")
I’m going to do my best to keep it simple here. Ferrous materials that conduct magnetic fields, attract magnetic fields and concentrate them. Neither copper, aluminum or 18-10 stainless steel will do that. Copper and aluminum do conduct electricity though. Because copper and aluminum are good conductors, meaning they have less resistance, not much heat is generated. Well some heat is generated but not like you see in ferrous metals. The ferrous metals concentrate the magnetic fields and moving magnetic fields cause current flow. But since iron is not the best conductor, having high resistance, the current generated causes a lot of heat. That is the short course, very short course. Core design in a transformer is far more complicated this isn’t the place to go into that. The trick in a transformer is to concentrate the fields but minimize the current generated and thus reduce the heat greatly. Heat is losses and losses are not good. Most residential transformers are 97% efficient or higher. Larger commercial transformers and sub station transformers run 99.5% efficient or higher. Those figures above are now required by law for transformers built after 2006 IIRC. ---
**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\ **Post date:** [February 6, 2022, 5:53am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/54 "2022-02-06T05:53:26Z")
> [@keith](#): > > Copper and aluminum do conduct electricity though. Have copper wiring in for electric, and even had a mobile home with aluminum wiring for electric. ---
**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\ **Post date:** [February 6, 2022, 1:40pm UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/55 "2022-02-06T13:40:49Z")
> [@MikeInNH](#): > > Because they don’t have magnetic properties. All materials have magnetic properties. Ones that work with inductive heating need strong, positive magnetic susceptibility. Iron is cheap and it would be the material of choice for this application. Paramagnetic materials develop weakly positive magnetic fields in the presence of an electric field and diamagnetic materials develop weak negative magnetic fields. ---
**Author:** ![Jerome-Silverman](https://avatars.discourse-cdn.com/v4/letter/j/71e660/32.png) [@Jerome-Silverman](https://community.cartalk.com/u/Jerome-Silverman)\ **Post date:** [February 10, 2022, 5:18am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/56 "2022-02-10T05:18:59Z")
Even better would be battery swap or truck or rail car ferries to major destinations. ---
**Author:** ![sheridanpaul](https://avatars.discourse-cdn.com/v4/letter/s/c2a13f/32.png) [@sheridanpaul](https://community.cartalk.com/u/sheridanpaul)\ **Post date:** [February 11, 2022, 1:56am UTC](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267/57 "2022-02-11T01:56:17Z")
> [@shadowfax](#): > > Hybrids need to be treated as the thing we use to consume less gasoline while waiting for EVs to become as practical as an ICE car. Yep, been driving one of those “bridge” cars for 15 years now. Expect to be driving it for at least another five… [Previous page](https://community.cartalk.com/t/this-would-be-a-game-changer-for-evs/182267.md?page=2)