Momentum Dynamics, a wireless charging startup, sent out a press release this week claiming that they will deliver 200 kW wireless charging systems by the end of the year. In comparison, the company had previously only delivered 25 kW and 50 kW systems, and just recently, it was testing a very slow 1.5 kW wireless charger with Google for its self-driving car prototypes.
A 200 kW system would not only be faster than most charging stations, but it would also have higher output than the Tesla Supercharger’s 135 kW charge rate.
Momentum Dynamics CEO Andrew Daga on the announcement:
“These high power levels are causing a lot of excitement across targeted vertical markets, especially with municipal bus transit agencies where high power is required to keep a municipal bus in operation all day,”
Dada said the company is already planning to deliver the charging systems to municipal agencies this year in Maryland and Washington state.
The company describes its wireless charging technology in the press release:
“Wireless chargers use resonant magnetic induction to transfer power without the use of cables. They include the transmitter on the ground and a power receiver mounted to the underside of the vehicle. Despite an air gap of up to 12”, the efficiency of inductive charging is equivalent to plug-in charging.”
Charging efficiency and charge rate have always been the main problems with wireless charging technologies. While Momentum Dynamics seems to have solved the charge rate issue, if they can indeed deliver a 200 kW, we will have to wait for a demonstration to prove the claim of efficiency equivalent to plug-in charging stations.
Most plug-in systems can charge a vehicle at 90% efficiency with conversion from AC to DC charge. Although wireless suppliers have claimed similar results in the past, it would be particularly important here at a charge rate of 200 kW.
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I don’t believe it for a sec… Copper wire has something like 99-99.9% efficiency to transfer the power (depending on length and thickness/gauge). Energy is lost at AC/DC conversion. Wireless charging has the same loss in AC/DC, but adds another loss where copper wire would be.
Overall efficiency for WPT is 94% from grid to battery and therefore comparable to the effeciency by cable from grit to battery!
I’m always willing to change my mind regarding new stuff, but simply saying it is the same without explanation why is not enough to me! It is like saying god exists without proof. So how does it work that it has the same efficiency as direct copper wire? Or is the point in the whole system (grid to battery)? If so, why does have AC/DC conversion higher efficiency with wireless power transfer than with conductive power transfer?
cute girl pic unnecessary:… No Tesla is the video
Okay
but price, not only specs, is very important too.
If they really have a working product, I think it would be a sound decision for Tesla to buy them and make that a feature of the Model 3.
Then again… maybe it would freak people out about the possibility of getting cancer or whatever. Tesla already has enough misinformation they’re fighting against… I’m not sure the benefits of wireless charging really outweigh the cons of people spreading rumors like that.
There aren’t currently any cars that can charge at that rate (200 kW), but I suppose there may be some buses or trucks that can?
The argument with “no cars can charge at 200kW” are just dumb, could have been made in the past with 30kW, 60kW, 125kW.. If it realy are at 90% efficiency it sounds very promising and at 200kW!. No need to plug a cable into the car anymore or use/develope Tesla infamous autonomous snake/dildo charger.
While I may agree wi you, it’s not because you called me dumb.