Lexus GS450h Inverter DC DC Converter Delete

[Gregski]

hope some of you find this useful, I did not want to burry it in my truck build thread or any of the deep inverter support threads

please post your ideas of what you would use this empty cavity for

[Gregski]

Top Tip: Three keys to a successful EV conversion are:

• Networking

• Networking

• Networking

[Gregski]

these high voltage AC motor wires really do not have to be cut and with the right amount of WD-40 and handrolics they eventually do come right out

[MattsAwesomeStuff]

That doesn't look like networking. That looks like Artur doing the work for you while you hold the camera and distract him!

[Gregski]

That doesn't look like networking. That looks like Artur doing the work for you while you hold the camera and distract him!

hey, let's not split hairs here

[TongueTester]

Greg,

I thoroughly enjoyed the video, you have a way of making these topics accessible to us common folk. I have my fingers crossed that you do a tear down video of the gen 4 inverter.

Thanks Peter

[Gregski]

Greg,

I thoroughly enjoyed the video, you have a way of making these topics accessible to us common folk. I have my fingers crossed that you do a tear down video of the gen 4 inverter.

Thanks Peter

thank you for the kind words Peter, and ...

challenge-accepted.jpg (52.34 KiB) Viewed 3688 times

[marcexec]

Brilliant video, appreciate the "deep dive". Could you maybe add some subtitles/closed captions for the segment without audio? It felt important, at least at the time. Or add something to the description instead if that's easier?

[nino500]

please post your ideas of what you would use this empty cavity for

Do you think you could hide a Zombie in there?
Or maybe just a bunch of relays and fuses for new conversion related circuits like EPS and brake pump etc.?

[Gregski]

i do not recommend gutting the dc-dc as you loose an important spot value invudc aka inverter voltage reading

[maciek16c]

That's because the MTH data is being interpreted incorrectly. The "dc_bus_voltage", currently treated as the drive voltage, actually represents the DC-DC voltage (288V), while the inverter voltage (650V) is stored in the adjacent bytes.

[Bigpie]

I think the fix for that will be in the next release.

[nino500]

I have a question arising from this teardown:
As we're putting the battery connection directly into the inverter on the terminals behind the plastic cover, doesn't the existence of those thin busbars mean that the battery voltage is also applied to the DC-DC?
I thought, applying battery voltage there would blow the unit. Are we deleting the busbars or leaving them in?
Thanks.

[nino500]

I have a question arising from this teardown:
As we're putting the battery connection directly into the inverter on the terminals behind the plastic cover, doesn't the existence of those thin busbars mean that the battery voltage is also applied to the DC-DC?
I thought, applying battery voltage there would blow the unit. Are we deleting the busbars or leaving them in?
Thanks.

Ok. Just rewatched Damien's connection video again (must be 4 times now but it's like a good movie; you notice things you didn't get from the last watch every time).
I see now that the busbars remain in place and they're not a direct parallel connection to the boost converter input.