Yes it was good to hear that Nissan got the message and are going all out to install these chargers in useful locations *for all EV drivers*. These will also be high power AC ready.
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Yes it was good to hear that Nissan got the message and are going all out to install these chargers in useful locations *for all EV drivers*. These will also be high power AC ready.
A side blow towards the Tesla DC charging network? Only fair.Originally Posted by dpeilow
High power AC = how many amps? 1 or 3 phase?
Actually I think that's referring more to the fact that some Nissan chargers were not open to the general public.
Because there are tons of crazy people in this world...
a few more tantalising details... Nissan_QC_2011.PDF
Kevin Sharpe - Founder and Patron for UK registered charity Zero Carbon World. Founder and Chairman Mainpine Group. http://about.me/kevinsharpe
Thanks!
Neat to see the electrical topologies of these big DC quick chargers. Looks like the DC output has to be electrically isolated from the mains AC supply for safety reasons (is this a CHAdeMO requirement?). So, you have to convert 3-phase 50-60Hz line AC to a high-frequency variable-voltage AC, use a transformer for electrical isolation (and fixed voltage conversion as needed), then a rectifier bridge and filtering components to generate the DC to send to the car. More complicated than most would initially assume.
Interesting that they are changing the AC/AC conversion internals. Going to an AC/AC direct matrix frequency converter front-end, instead of a more traditional AC/DC/AC converter. Eliminates a capacitor in that intermediate DC stage (large, bulky, limited lifespan), as well as some mains input filtering (large, heavy inductors). Also looks like they consider the output DC capacitor as optional or not as important now (dotted lines in second schematic). All of which results in a charger that's about half the size of the original.
Here's one of Nissan's new style quick chargers being installed at Abingdon, near Oxford. It was spied by one of the guys on Ampera Owners Club.
I managed to find which corner of the car park they'd hidden the charger in Abingdon Waitrose and the Polar post was in use charging a Nissan Leaf. There were also a couple of engineers fixing up the Nissan fast charger, I didn't ask but suspect maybe it was their Leaf.
As far as I know, this is the first of the new cheaper units to be installed in the wild (I've seen pictures of some at Nissan's UK HQ).
Given permission, I would have snagged some better shots of the internals.
Zoom:
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