Re: [EVDL] DC2DC times 2
Hi Buddy, Why not run your heaters from the main pack voltage rather than changing the voltage twice. I use 2kW 220vac ceramic heater cores taken out of cheap fan heaters. They are about 4 square and supposedly very safe as the resistance rises with temperature so they never reach an unsafe temperature even if the fan stops.(Positive temperature coefficient) My cores are running on a 320v nominal voltage which can be over 340v when charged but have been working for years trouble free. I set them in the original heater matrix with the matrix cores cut out and fixed them with araldite. A simple air flow switch made from a float switch only allows heat when the fan is running for extra safety. You could string two 110v ones in series if 220v cores are not available in the US or Ebay from Europe. Use a high voltage relay to control them on and off. I use a high voltage DC semiconductor relay for temperature control using a cycling timer. It wasn't cheap but handles fast pulses better than a relay. Russ www.evalbum.com/1454 Lotus Elise EV Vortex GTEV Ride on lawnmower EV On Fri, 29/8/14, Buddy Mills via EV ev@lists.evdl.org wrote: Subject: [EVDL] DC2DC times 2 To: 'Electric Vehicle Discussion List' ev@lists.evdl.org Date: Friday, 29 August, 2014, 1:46 I need some help with spec(s) on a filter diode. I am attempting to hook up two DC to DC in my car along with a battery for my Aux 12volts. Yes, I know that seems excessive but I need the extra to run my 12dc to 110vac inverter that runs my heaters. It has been recommended here on the list serve that I place a diode on the output as to not give feedback to either of the DC2DC. My problem is I don't know what specifications I need to use. Plus if someone could also tell where I could purchase it I would be most appreciated. I know that there are quite a few of you on the list that would probably know this off the top of their head. Here is some info that I know. Battery is a Durcel AGM SL34M (20 amp hour rate - 55, Reserve Capacity:120 DC2DC #1 Zivan NG1 - 50amps DC2DC #2 Azure DC-DC750 - 56amps DC2AC inverter Cobra 2575 - 2500watts cont. - 5000watt peak 110vac - 1500 watt Heater Thanks for your assistance, Buddy Mills buddymi...@cox.net Look mom, no gas. http://www.evalbum.com/2887 Disclaimer: No animals were harmed or killed in the process of writing this email. Any stories to the contrary are, for the most part, either fictional or greatly exaggerated. ___ 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) ___ 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)
Re: [EVDL] DC2DC times 2
Thanks Cor, That is exactly what I needed. Buddy -Original Message- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Cor van de Water via EV Sent: Friday, August 29, 2014 1:48 AM To: Electric Vehicle Discussion List Subject: Re: [EVDL] DC2DC times 2 Buddy, You can use one of the Schottky diodes that is ideal for this architecture, typically they come in a block with 2 diodes integrated and ready to mount to a heatsink, the only thing you need to take care of is to insulate the diode housing from the chassis of your vehicle as the housing has the output to the + of your battery while the chassis of your vehicle is always connected to the aux battery negative. You can find these diodes searching Ebay with Schottky 200A or Schottky CNQ Examples are the IR 203CNQ100 (100V, 200A) or 301CNQ045 (45V, 300A) Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: cwa...@proxim.com Private: http://www.cvandewater.info Skype: cor_van_de_water Tel: +1 408 383 7626 -Original Message- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Buddy Mills via EV Sent: Thursday, August 28, 2014 5:47 PM To: 'Electric Vehicle Discussion List' Subject: [EVDL] DC2DC times 2 I need some help with spec(s) on a filter diode. I am attempting to hook up two DC to DC in my car along with a battery for my Aux 12volts. Yes, I know that seems excessive but I need the extra to run my 12dc to 110vac inverter that runs my heaters. It has been recommended here on the list serve that I place a diode on the output as to not give feedback to either of the DC2DC. My problem is I don't know what specifications I need to use. Plus if someone could also tell where I could purchase it I would be most appreciated. I know that there are quite a few of you on the list that would probably know this off the top of their head. Here is some info that I know. Battery is a Durcel AGM SL34M (20 amp hour rate - 55, Reserve Capacity:120 DC2DC #1 Zivan NG1 - 50amps DC2DC #2 Azure DC-DC750 - 56amps DC2AC inverter Cobra 2575 - 2500watts cont. - 5000watt peak 110vac - 1500 watt Heater Thanks for your assistance, Buddy Mills buddymi...@cox.net Look mom, no gas. http://www.evalbum.com/2887 Disclaimer: No animals were harmed or killed in the process of writing this email. Any stories to the contrary are, for the most part, either fictional or greatly exaggerated. ___ 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) ___ 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) ___ 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)
Re: [EVDL] DC2DC times 2
Seems like a very inefficienct system. If you want heat, just run resistance heat directly from the EV voltage. That is 100% efficient and costs nothing in complexity. Just series whatever number of 120v heater elements in series is needed to reach the pack voltage. And of course switch to DC fans. Or if you like the existing housings, just run a cheap $25 25W inverter to still run the fans on AC, but the elemetns on the DC. And of course bypass ALL switches, and contacts, and cutouts, and themrostates with RC sunbbers so they don't burn out on the first time they are used. Bob -Original Message- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Buddy Mills via EV Sent: Thursday, August 28, 2014 8:47 PM To: 'Electric Vehicle Discussion List' Subject: [EVDL] DC2DC times 2 I need some help with spec(s) on a filter diode. I am attempting to hook up two DC to DC in my car along with a battery for my Aux 12volts. Yes, I know that seems excessive but I need the extra to run my 12dc to 110vac inverter that runs my heaters. It has been recommended here on the list serve that I place a diode on the output as to not give feedback to either of the DC2DC. My problem is I don't know what specifications I need to use. Plus if someone could also tell where I could purchase it I would be most appreciated. I know that there are quite a few of you on the list that would probably know this off the top of their head. Here is some info that I know. Battery is a Durcel AGM SL34M (20 amp hour rate - 55, Reserve Capacity:120 DC2DC #1 Zivan NG1 - 50amps DC2DC #2 Azure DC-DC750 - 56amps DC2AC inverter Cobra 2575 - 2500watts cont. - 5000watt peak 110vac - 1500 watt Heater Thanks for your assistance, Buddy Mills buddymi...@cox.net Look mom, no gas. http://www.evalbum.com/2887 Disclaimer: No animals were harmed or killed in the process of writing this email. Any stories to the contrary are, for the most part, either fictional or greatly exaggerated. ___ 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) ___ 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)
Re: [EVDL] DC2DC times 2
Buddy, You can use one of the Schottky diodes that is ideal for this architecture, typically they come in a block with 2 diodes integrated and ready to mount to a heatsink, the only thing you need to take care of is to insulate the diode housing from the chassis of your vehicle as the housing has the output to the + of your battery while the chassis of your vehicle is always connected to the aux battery negative. You can find these diodes searching Ebay with Schottky 200A or Schottky CNQ Examples are the IR 203CNQ100 (100V, 200A) or 301CNQ045 (45V, 300A) Cor van de Water Chief Scientist Proxim Wireless Corporation http://www.proxim.com Email: cwa...@proxim.com Private: http://www.cvandewater.info Skype: cor_van_de_water Tel: +1 408 383 7626 -Original Message- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Buddy Mills via EV Sent: Thursday, August 28, 2014 5:47 PM To: 'Electric Vehicle Discussion List' Subject: [EVDL] DC2DC times 2 I need some help with spec(s) on a filter diode. I am attempting to hook up two DC to DC in my car along with a battery for my Aux 12volts. Yes, I know that seems excessive but I need the extra to run my 12dc to 110vac inverter that runs my heaters. It has been recommended here on the list serve that I place a diode on the output as to not give feedback to either of the DC2DC. My problem is I don't know what specifications I need to use. Plus if someone could also tell where I could purchase it I would be most appreciated. I know that there are quite a few of you on the list that would probably know this off the top of their head. Here is some info that I know. Battery is a Durcel AGM SL34M (20 amp hour rate - 55, Reserve Capacity:120 DC2DC #1 Zivan NG1 - 50amps DC2DC #2 Azure DC-DC750 - 56amps DC2AC inverter Cobra 2575 - 2500watts cont. - 5000watt peak 110vac - 1500 watt Heater Thanks for your assistance, Buddy Mills buddymi...@cox.net Look mom, no gas. http://www.evalbum.com/2887 Disclaimer: No animals were harmed or killed in the process of writing this email. Any stories to the contrary are, for the most part, either fictional or greatly exaggerated. ___ 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) ___ 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)
