Hi folks,
In have 5 deep cycle batteries in paralell
With my inverter running at 1.5kw the current is obviously quite high on each battery so I would need big low value shunts to measure it.
However I also want to know what is going on when the inverter is only drawing a couple of wats or when its off all together and I need to see any battery to battery current that could indicate a problem, this would need a much higher value shunt resistor.
It has occured to me recently that a FET or an IGBT might just do what I want.
The thought process ... If I were to measure the voltage across the channel and hold it stable by adjusting the gate, would the gate voltage be proportional to the current in the channel?
If that is even plausable, is there any field effect device that will control DC current in both directions?
Could I use a diode bridge to effectivly keep the fet the right way up or would that require a high side driver?
Its a bit off the wall I know but I'd apriciate anything you have to offer
Thanks folks
Al
In have 5 deep cycle batteries in paralell
With my inverter running at 1.5kw the current is obviously quite high on each battery so I would need big low value shunts to measure it.
However I also want to know what is going on when the inverter is only drawing a couple of wats or when its off all together and I need to see any battery to battery current that could indicate a problem, this would need a much higher value shunt resistor.
It has occured to me recently that a FET or an IGBT might just do what I want.
The thought process ... If I were to measure the voltage across the channel and hold it stable by adjusting the gate, would the gate voltage be proportional to the current in the channel?
If that is even plausable, is there any field effect device that will control DC current in both directions?
Could I use a diode bridge to effectivly keep the fet the right way up or would that require a high side driver?
Its a bit off the wall I know but I'd apriciate anything you have to offer
Thanks folks
Al