This sounds like a technique that some cordless toothbrush products used to use in the 90s. From a reliability standpoint it helps to not have an opening in the product to avoid ESD failures. It’s nice not to have charging cords and the mechanical failures associated with plugging in a cord. The power jack is one of the highest failure mechanisms in a product. But, I think that the standard will evolve and in 5 years products will need more current or another charging standard.
I have to agree with Sparky_Watt. Waste due to the inefficiency of wireless transfer of energy is a big deal, even if we are just talking about charging millions of personal electronic devices this way. When you add electric vehicles -- thousands of amp-hours of battery capacity instead of just 2 or 3 amp-hours per user -- then this wasted energy has significant cost and environmental impact.
The burning of fossil fuels is still the #1 method of generating electricity worldwide, by a wide margin. How many megatons of additional greenhouse gases is it worth just to offer consumers the convenience of wirelessly charging their electric cars?
No way, wireless transfer is all around us, your radio harms u when u listen to it? its all about coils, and induction loaded. Nothing to do with flesh harm.
The idea of having wireless charge on car is cool, but too luxury & unnecessary in my view. Why not to focus on connected, more inteligent vehicles and safer vehicles.
Wireless charging in a special lane on highways (the HOV lane) could extend the range of PHEV and EV vehicles. The car's receiving coil could be lowered down to the road or attached to a fifth wheel. Coils embedded in the road in high traffic areas or parking lots could also help recharge vehicles.
When will the wireless people get it through their heads that wireless transmission is an energy sinkhole! It is only practical for applications where the power is low enough that the power efficiency is unimportant. If you put even a transformer in the path, you have a loss relative to direct wiring, and the bigger the gap the bigger the loss! In a time like ours when energy is scarce and getting scarcer, it is irresponsible to be talking about wireless power transmission. Bring it up again after fusion power has been solved!
To: T in Az -
Last I heard, there was no consistent correlation between E-M field exposure and any disease process, except burns. Because the results of the studies vary with study, you can get a negative result by cherry-picking studies, but that is unscientific. You must use all the credible data to come to a sound conclusion.
Charging the device has become a routine in every persons life today, given it is a Cell Phone, Media Player or Computing Device. It creates a mess in the domestic environment and offices including cars as well.
It is responsibility of device manufacturers compared to car manufacturers to bring wireless charging in application.
I agree with Duane, this is putting the cart before the horse, and induction can't be as efficient as a direct connect and who will be expected to pay for the losses between the primary and secondary. Then there's the issue that Pixie alluded to, the close proximity to a high strength E-M field, some studies have linked leukemia to E-M radiation. Just wondering without any specifics.
I don't know that I'd classify the need as a need for "wireless charging." I'd say the need is for easy and convenient charging. Wireless certainly could be an easy and convenient charging method, but not the only one.
I can see Toyota's point about it not being something consumers would pay for, even if they might want it. How long did we last with the charger for pretty much every single cell phone being different before agreeing on a standard?
The general public is rarely willing to pay for a specific technology (barring significant generated hype). They will, however, pay for a solution to their specific problem, phrased from their perspective. And the public will put up with a lot of peripheral inconvenience to get something they want.
Perhaps more important than wireless charging to the adoption of electric cars is the accessibility of charging stations in general and the charge time.
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