From what the installation guy told me, the chargepoint is clever enough to reduce the current available to the car (or tell the car to reduce demand? One of the two...) if there is a significant demand elsewhere in the house - for example if the washing machine and the power shower are on at the same time and I go out to the workshop and start using my lathe or whatever.The chargepoint also supplied 1kHz PWM signal that indicates to the charging system (in the car) his much current is available. The PWM signal goes negative and positive with respect to ground. I imagine this provides a bit more safety, being slightly more complex than a positive only waveform.
Well of course, but you said "for the EV to determine how much", which is not the same thing. Power line signalling is the EV being told how much power is available.By using power line communication, where you can use the mains to carry data by superimposing it onto the Ac.
Why not?There is also a safeguard against you driving off while plugged in, which a standard mains plug wouldn't provide.
Some are, some aren't. If they are, then they need to be able to measure that loading, usually with a current transformer.From what the installation guy told me, the chargepoint is clever enough to reduce the current available to the car if there is a significant demand elsewhere in the house - for example if the washing machine and the power shower are on at the same time and I go out to the workshop and switch my latge on.
There is also a safeguard against you driving off while plugged in, which a standard mains plug wouldn't provide.
Since you're actually addressing me, I'll temporarily un-shut up.I didn't go to EV Charging System Cable and Port Design school, but all of the EVs I've seen have doors that have to be opened to access the car's charging port. A sensor on the door should easily determine if the door is open, whether or not a cable of any type is attached. I think my friend's Audi had a warning lamp on the dash if she didn't close the fuel door.
Disclaimer - I've not rewound to find the start of the sub-discussion on charge point management.Interesting. How dou you think the EV might determine available current from a 3 wire mains feed?
Well you can go to 14.5kW with a single-phase supply (63A circuit).I think that for any serious fast charger you will need three phase, that can be a lot more than £900 and we must not forget that the electrical distribution system that supplies many housing estates will not have been designed to handle a large proportion of them charging electric vehicles. This issue will continue back up the grid with each supply point potentially being stretched to it's limits.
Disclaimer - I've not rewound to find the start of the sub-discussion on charge point management.
But surely an on-board charger designed to plug into a regular domestic socket wouldn't do any determination of "available" current. It would manage the back-end output to ensure the batteries were looked after, but the front would basically be a switch mode power supply, designed to draw at most 13A in the UK and 16A sur le continent? Probably less, actually, to avoid loading outlets at the max supported for extended periods.
If the response to my "Disclaimer" is "That's obvious. You should have.", apologies.
If what I heard once is true we should be seeing a skew towards more girls/fewer boys being born. Stress does that, because at a population level increasing stress coud be a sign of impending population-level catastrophe, and if a population is to recover from a massive de-populating situation you need more women than men.No it is not. Reproduction is the solution.
The greater the population the more likely the chance of survivors when things go pear shaped.
It's nature's way - individuals don't matter and are disposable, as long as there are survivors
It's common throughout the living world that stressed populations have strategies to survive. The first organism you learn about at school is the amoeba. When things are OK they reproduce steadily by budding, when the pond dries up they "encyst" and subdivide many times over. Come wetter weather and the cyst expands breaks up and there's millions of the little boogers.
Works similarly with homo sapiens, destabilised societies (e.g. war etc) tend to reproduce more. Stable societies even have falling populations causing them anxiety.
I have worked on projects where motor control panels were linked so contactors would be inhibited so you could not run all six 100Kw motors simultanously because a) there was no need and b) the supply was only 620 amps.this could be done with a simple electrical mechanical device.
Yes - I was forgetting that SMPSUs aren't resistive, but you ought to be able to get to a .95 power factor.Yes but a single load, you have to sum all loads, resistive loads can be larger but reactive are limited, hence why you cannot power larger machinery from an inverter and have to use a convertor. If upgrading a supply then you would go three phase, solves many issues and helps balance the grid.
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