Power Jack 10 kw inverter fan upgrade

[Keithholmez]

I'd like to upgrade the fans in my PJ 10kw inverter. I purchased a couple 4 wire delta fans and a control board that varies the fan speed depending upon the temperature  I'm looking for a good place to tap into the inverter input power. The idea is the circuit receives power when the inverter is switched on. The fans run continuously when the inverter is on. The temperature of the transformer and the inverter main board control the speed of the fans. 

 

I think I see a couple jumper plugs that are marked fan. I'd really like to connect that would work. Can you suggest a source of power that would fit my needs?  If the fan connector, do you know the part number the mating connector?

 

Thanks

 

KeithHolmes 

[Sid Genetry Solar]

14 minutes ago, Keithholmez said:

If the fan connector, do you know the part number the mating connector?

It's a Chinese variant of the JST XH connector.  Specifically, it's known as an XHB connector (with a latch), which you can only find in Chinese markets (i.e. Aliexpress, LCSC, etc.) as it isn't an official JST part.

 

16 minutes ago, Keithholmez said:

The idea is the circuit receives power when the inverter is switched on. The fans run continuously when the inverter is on. The temperature of the transformer and the inverter main board control the speed of the fans.

Umm...OK.  What voltage inverter do you have?  And what voltage Delta fans did you purchase?

You might be able to use the other side of the DPDT power switch to turn your fans on and off (running your own wire from the battery terminal to the switch, then to your fan controller).  Keep in mind, however, that the switch is not rated for 48vDC...arcing and lack of longevity may result from using it as a master power switch for fans on a 48v system.  (The switch runs a very low power signal for the PJ power on/off function.)

16 minutes ago, Keithholmez said:

I think I see a couple jumper plugs that are marked fan. I'd really like to connect that would work.

These connectors have a (low power, max 1-2A) regulated 12v on one lead, and a CPU-controlled FET-switched ground on the other.  Unfortunately, this "fan output" is only controlled by one of the 2 provided thermistors.  You might be able to use the 12v pin as a "inverter on" signal, though depending on your fan controller, this may or may not be easy to use.