Wanted to share another update on my Zombie/GS450H investigations!
Well it spins! Thanks to Damien and those contributing to this thread
First time getting the GS450H inverter and drive running
There's a little caveat and a question I might need some help with
So I got hold of a third GS450H inverter. Connected it up and get the exact same result as the first two, InvStat stays Off, Invudc not reading HV, and no spin. So I wired back in the GS450H VCU to check if this new inverter could be run on that board like the other inverters and yes, all runs 100% forward and backward. I've been capturing the comms signals with a cheap saleae logic analyser, so hooked it up to the GS450H VCU comms pins. Look to get decent signals (although I wouldn't know what correct signals looked like!) and when blipping the throttle and spinning the motor, MTH signals pulsed away, so my conclusion was that the inverter can actually communicate as needed to run the system
Seeing Damien's posts about the latest 1.06 firmware, I reconnected the zombie and updated the firmware. Quick test but no change in result. I wanted to grab a saleae log for comparison to my previous logs, plugged the saleae into the laptop (running off its own battery power) and followed the same Ignition On and Start signal sequence. HV contactors did their thing, HV to inverter (4 x 12V batteries, 49V) and 13.5V to inverter,
and there it was! First time hearing the inverter whine with the Zombie.
This was accompanied by the Windows 10 USB disconnect and reconnect sound, so the laptop was dropping and reconnecting to the saleae analyser??? Strange. I plugged the analyser out and the inverter whine stopped immediately. Analyser was connected to the 8 comms lines and the zombie ground.
So I repeated this to see if I could get the gearbox to spin. Connected the analyser to the laptop again, ign on, start applied, system into run mode and inverter whine. Applied the forward signal and pressed the throttle pedal and away it span, class. Spent a few minutes spinning at different speeds, and checked the web interface to see Invstat was ON and Invudc was reading correctly. When I unplugged the analyser USB cable, inverter shut down again.
Unfortunately I'm not sure what this means, the analyser must be doing something to help the 12V ground plane maybe, or doing something to correct the resistance or separation of the comms signals. Would anyone have an idea what this means to maybe point me in the right direction? Thank you