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SAE J2954 és un estàndard per a la transfe … SAE J2954 és un estàndard per a la transferència d'energia sense fil (WPT) per a vehicles elèctrics liderat per SAE International. Defineix tres classes de velocitat de càrrega, WPT 1, 2 i 3, amb un màxim de 3,7 kW, 7,7 kW i 11 kW, respectivament. Això fa que sigui comparable als estàndards de càrrega per cable de velocitat mitjana com el sistema comú SAE J1772. S'està definint un WPT9 molt més potent a J2954/2 per a 500 kW per a vehicles pesants que tenen l'espai necessari per a muntar la placa d'inducció més gran. El sistema funciona seguint principis similars a la càrrega inductiva, però utilitza el concepte d' amb una eficiència demostrada al voltant del 85%. Això fa que sigui semblant als carregadors per cable, on la major eficiència teòrica es compensa una mica pels sistemes d'aïllament necessaris que impedeixen la retroalimentació d'alt corrent, sistemes que el J2954 amb buit d'aire no requereix. Els millors carregadors de velocitat mitjana de la seva classe són al voltant del 94%. El desenvolupament del concepte de transferència de ressonància subjacent va ser desenvolupat per a l' Institut Tecnològic de Massachusetts (MIT) i després es va escindir com a WiTricity el 2007. WiTricity ha liderat els esforços d'estandardització de SAE, que van començar el 2012 i s'han sotmès a dues reversions fins al 2019. L'estàndard final es va publicar el 2020. WiTricity prediu que els carregadors J2954 estaran disponibles com a una funcionalitat addicional a partir del 2022.uncionalitat addicional a partir del 2022.
, SAE J2954 is a standard for wireless power … SAE J2954 is a standard for wireless power transfer (WPT) for electric vehicles led by SAE International. It defines three classes of charging speed, WPT 1, 2 and 3, at a maximum of 3.7 kW, 7.7 kW and 11 kW, respectively. This makes it comparable to medium-speed wired charging standards like the common SAE J1772 system. A much more powerful WPT9 is being defined in J2954/2 for 500 kW charging for heavy-duty vehicles which have the room necessary to mount the larger induction plate. The system works along similar principles as inductive charging, but uses the resonant inductive coupling concept with a demonstrated efficiency of around 85%. This makes it similar to wired chargers, where the higher theoretical efficiency is offset somewhat by necessary isolation systems that prevent high-current back-feeding, systems that the air-gapped J2954 does not require. Best-in-class medium-speed chargers are around 94%. Development of the underlying resonance transfer concept was developed by Marin Soljačić at the Massachusetts Institute of Technology (MIT) and then spun-off as WiTricity in 2007. WiTricity has led the SAE standardization efforts, which began in 2012 and have undergone two Recommended Practice releases as of 2019. The final standard was published in 2020. WiTricity predicts that J2954 chargers will be available as add-on features beginning around 2022. as add-on features beginning around 2022.
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SAE J2954 is a standard for wireless power … SAE J2954 is a standard for wireless power transfer (WPT) for electric vehicles led by SAE International. It defines three classes of charging speed, WPT 1, 2 and 3, at a maximum of 3.7 kW, 7.7 kW and 11 kW, respectively. This makes it comparable to medium-speed wired charging standards like the common SAE J1772 system. A much more powerful WPT9 is being defined in J2954/2 for 500 kW charging for heavy-duty vehicles which have the room necessary to mount the larger induction plate.ssary to mount the larger induction plate.
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