The other stumbling block is that the EMI emissions from 36(or more) volt systems are sufficiently greater, that passing EMC tests is more a problem, just because of the extra voltage and the resulting transients produced. Some switchgear was also found to be wanting, not in insulation, but the extra arcing is a problem reducing the contact life.
In any case, most car makers are now going towards 12V bus systems, where one high(ish) current feed goes round the whole vehicle body, with either superimposed data, or a separate data bus to control all the lights, doors, windows, HVAC, accessories etc etc. With a corresponding weight and cost saving. Accessories are also becoming lower powered and more efficient, reducing the need for power, though you wouldn't know it from some of the sound systems the kids fit these days! If you want High Voltage vehicle electrics in a current production car, look at the (in)famous Prius. 440V 3 phase AC for the traction motor, fed from 200+V batteries! (Not so worried about 50 Volts now?) You could quite literally run a house of the car when you park up, and when the battery gets low, arrange for the engine to automatically start to re-charge it, unless like some you've hooked up an array of solar cells... http://aprs.org/APRS-SPHEV.html for example. Your own personal mobile UPS! (Have to say, some of the modifications you have to wonder about!) Me.... Having none of that, way too difficult and expensive to maintain, but I admire the ingenuity of it all... Regards to All.. Dave Baxter. > -----Original Message----- > 2. Re: Where does 28V come from? (Robert Atkinson) > 3. Re: Where does 28V come from? (Poul-Henning Kamp) > 4. Re: Where does 28V come from? (Lux, James P (337C)) > 5. Re: Where does 28V come from? (Poul-Henning Kamp) > 7. Re: Where does 28V come from? (Magnus Danielson) _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
