adriftatsea
100 W
Hi.
I'm building another 72V AC powered ATV/UTV thing using Nissan Leaf packs and would like to avoid using a 12V battery.
Some setups I've seen use a DC-DC Converter with a switchable 'enable' wire (Sevcon's DC-DC, some Delta-Q chargers, etc) that will turn on the DC-DC converter when pack voltage is applied. The DC-DC converter would then be able to fed 12v to the contactor and thus the controller/motor.
The downside's I've seen is that if the converter dies, you could be stranded without aux power to drive emergency flashers and such. In my application this isn't a problem. The other is to use a toggle switch rated for >72v - I'll be using a properly spec'd sealed Honeywell switch.
Is there any other reason this config is not more prevalent (Grounding, etc)?
I'm building another 72V AC powered ATV/UTV thing using Nissan Leaf packs and would like to avoid using a 12V battery.
Some setups I've seen use a DC-DC Converter with a switchable 'enable' wire (Sevcon's DC-DC, some Delta-Q chargers, etc) that will turn on the DC-DC converter when pack voltage is applied. The DC-DC converter would then be able to fed 12v to the contactor and thus the controller/motor.
The downside's I've seen is that if the converter dies, you could be stranded without aux power to drive emergency flashers and such. In my application this isn't a problem. The other is to use a toggle switch rated for >72v - I'll be using a properly spec'd sealed Honeywell switch.
Is there any other reason this config is not more prevalent (Grounding, etc)?