Tesla 70D Cabin Heater (PTC)

ECOENERGI1 said:

I bought this heater last year together with a few other parts, after doing a lot of reading and watching I decided to try and figure out some of the workings, I watched Damien's videos over and over again to get this far. thanks to open source

Please contribute freely

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Tomdb said:

Very nice, so a drop inboard should be super simple.

monitor the three temperature sensors to keep it in check, reading the onboard current sensor should be easy.

it is an ACS current sensor. https://www.allegromicro.com/en/Products/Current-Sensor-ICs/Fifty-To-Two-Hundred-Amp-Integrated-Conductor-Sensor-ICs.aspx

simple 0-5V output, only question is if it is offset (bidirectional) or starting from 0V (unidirectional).

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Tomdb said:

cool so it is the X050U version with 60mv/A scaling with a 0.6V offset.

Used plenty with arduinos, however I would advise against using an Atmega328p as the control chip does run into some issues.

What frequency you driving the igbts during test? Mind looking at the input voltage with the scope to see if it is noisy?

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Nuts&Volts said:

Any way you could measure the dimensions of the heater?

its approximately 8"x12" and 4 1/2 where the power stage is. Working on the inverter so no updates on the heater for now

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