I have one of these step up units that has a input of 12 to 15 volts vdc and has a output of 120 vac 60 hz. At 12 vdc input the ampere is 100 amps while the 120 vac output is 10 amps which is 120 x 10 = 1200 watts. The dc input is also 12 x 100 = 1200 watts. This is call a inverter. You then can converted this to a DC voltage using a bridge.
I do not use a 12 volt battery to power the inverter, the ampere would be too high on the 12 volt side. I use a inverter alternator which can produce 7 kw at 110 vdc which is inverted to 120 vac 60 hz at 5 kw and at the same time charges a 12 volt deep cycle battery. This equipment is also used in ambulances and utility vehicles. The pilot shaft of the motor runs the inverter alternator which only powers the inverter under heavy load, when the main battery is disconnected from the motor. Uses only kinetic energy under heavy loads when I am rolling down hills or coasting to a stop. There is only a very light load to 120 vac 60 hz to coolant pumps and fans that only take 0.5 amp per device when the EV is moving on a level grade or up grade. It something like regenerative, except I save it a trip from going through the main batteries and send the current directly to the accessories units. Roland ----- Original Message ----- From: Peter Eckhoff<mailto:[email protected]> To: Electric Vehicle Discussion List<mailto:[email protected]> Sent: Monday, April 28, 2014 6:24 PM Subject: [EVDL] Converter Direction of flow The converters that I see for EV applications have the output voltage at 12 volts. What happens if you apply 12 volts to the output side, will that produce 120 to 140 volts on the input side? or do you need a converter specifically designed to go the other way? The idea is to take a 12 volt (or 24 volt) battery with high amphrs and use the electronics to produce 120 volts at a tenth of the battery's rated amphrs to run a 120 volt DC motor using lithium based batteries. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140428/6fac4950/attachment.htm<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140428/6fac4950/attachment.htm>> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub<http://www.evdl.org/help/index.html#usub> http://lists.evdl.org/listinfo.cgi/ev-evdl.org<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA<http://groups.yahoo.com/group/NEDRA>) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20140428/ede44170/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
