
If there is a slight incline, you might see 20 kW, but it soon drops to under 10 kW as you crest the hill.
So on net flat ground, the electric Prelude has a highway speed range of about 160 km! I am impressed.
It was new once
I had a look through the stock cupboard and unfortunately we only have a 24v contactor with the aux leads. Maybe a voltage booster board to power the contactor if you system is all 12v?jonescg wrote: ↑Sat, 09 Nov 2019, 13:49It was new onceBut yeah, this one has welded several times now. I wouldn't mind getting one of these GV350 units, but it looks like they need a separate economiser circuit? Otherwise a GV240 looks suitable. Main thing is the auxiliary leads for informing you of a stuck contactor.
I wonder if the hold voltage is 12v or below
Surely there is an arrangement with some diodes and a capacitor that could eliminate the relay. You do need a push-pull inverter capable of coil current however, and your drive signal also needs to be push-pull (and capable of driving the coil, obviously).
Yes, that's why I installed one, and it's own relay. But I also don't want to keep everything pre-charged when the car is off. Hence i need a 0.5 second delay between the master precharge relay and the master contactor closing, so it can manage any capacitance due to the charger, DC/DC converter and the aircon compressor.francisco.shi wrote: ↑Mon, 11 Nov 2019, 10:29 I think there must be some capacitor that needs to be precharged. The master contactor should only switch under load in a fault condition.
Have you tried to put a precharge resistor and checked that it is not trying to switched into a discharged capacitor?
I found a second one if anyone needs one.T1 Terry wrote: ↑Sun, 10 Nov 2019, 11:30I had a look through the stock cupboard and unfortunately we only have a 24v contactor with the aux leads. Maybe a voltage booster board to power the contactor if you system is all 12v?jonescg wrote: ↑Sat, 09 Nov 2019, 13:49It was new onceBut yeah, this one has welded several times now. I wouldn't mind getting one of these GV350 units, but it looks like they need a separate economiser circuit? Otherwise a GV240 looks suitable. Main thing is the auxiliary leads for informing you of a stuck contactor.
T1 Terry
The Gigavac has a part number of GX14CAB, so the 350 amp continuous model.
Is 0.5 seconds enough?
I had a problem when the precharge never reached a close enough voltage after the car sat and wouldn't close the main contacts. I tried adding more resistors but I just couldn't get the voltage to come up.antiscab wrote: ↑Mon, 11 Nov 2019, 12:32 a smart pre-charger that only closes the master contactor when the voltage gets within a pre-determined level would also prevent welding situations where say the dc-dc is drawing more than normal on start up.
Fixed time pre-charging doesn't guarantee pre-charge unless everything is okay