How does AC (smart) charging actually work? PWM explained!

Development and discussion of fast charging systems eg Chademo , CCS etc
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Gregski
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How does AC (smart) charging actually work? PWM explained!

Post by Gregski »

very detailed explanation if you want to test your inner Geek


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Re: How does AC (smart) charging actually work? PWM explained!

Post by Gregski »

Video Takeaways With Direct Links Back To The Video


Two Different Types of Charging Plugs
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Re: How does AC (smart) charging actually work? PWM explained!

Post by Gregski »

The EVSE Can Show One Of Six Different States / or Statuseses


EVSE Status: A, B, C, D, E, F

Different EV charging states.jpg
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Re: How does AC (smart) charging actually work? PWM explained!

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Status A

Status A.jpg
Status A 2.jpg
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Re: How does AC (smart) charging actually work? PWM explained!

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Status B

Status B.jpg
Status B 2.jpg
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Re: How does AC (smart) charging actually work? PWM explained!

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Status C/D

C = Charging
D = in the old days of lead acid batteries meant Charging with Ventilation

Status CD.jpg
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Re: How does AC (smart) charging actually work? PWM explained!

Post by tom91 »

https://en.wikipedia.org/wiki/SAE_J1772 This has all the bits you are covering listed per topic.
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Re: How does AC (smart) charging actually work? PWM explained!

Post by xvyDFatih »

How can we detect that an ac or dc charger is plugged?
Gregski wrote: Wed Oct 04, 2023 2:32 pm very detailed explanation if you want to test your inner Geek


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Re: How does AC (smart) charging actually work? PWM explained!

Post by tom91 »

DC chargers go into 5% duty cycle, thus requesting digital communications instead of PWM.
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Re: How does AC (smart) charging actually work? PWM explained!

Post by uhi22 »

Yes, and AC chargers have two possibilities: Either use a higher PWM ratio, which defines the allowed current, or apply 5% and announce in the high level communication (IP, TCP, V2GTP, EXI) during the negotiation of the charge parameters that they support AC.
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