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ZVW30 compressor interface?

Discussion in 'Gen 3 Prius Technical Discussion' started by bwilson4web, Jun 10, 2015.

  1. bwilson4web

    bwilson4web BMW i3 and Model 3

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    Has anyone measured or studied the electrical interface to the compressor?

    My review of the schematics suggest there may be an encoder and three phases. What I can't tell are:
    • power voltage
    • power current or load
    • control signals
    The reason I ask is that unit may be a couple of kW and possibly sine-wave like. I have an approach using miniVCI but before starting my investigation, I thought I'd look around and ask.

    Thanks,
    Bob Wilson
     
    #1 bwilson4web, Jun 10, 2015
  2. mrbigh

    mrbigh Prius Absolutum Dominium

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    Interesting topic, of witch I'm tagging alone for now..............
     
    #2 mrbigh, Jun 10, 2015
  3. ChapmanF

    ChapmanF Senior Member

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    One day on the interwebs I came across a fascinating PDF of "University of Toyota course 071 Toyota Hybrid System" and it has an extensive section on the air conditioning. It seems to show that Gen 2 had a simple 3-ph motor with all the drive circuitry living in the main inverter/converter assembly. (The compressor's power cable had a 3-pole plug on the end.)

    The ES14 compressor introduced in Gen 3 has a plain 2-conductor power connection going in, taking straight 201.6 VDC. All its motor drive circuitry is internal (and conveniently cooled by chilled refrigerant, I bet). As to how it's controlled, I can't find that detail in the UofT document, but I'm pretty sure I remember hearing somewhere that the new compressor just has its own CAN address and you send it commands to pick a speed.

    You'd think these changes might have made the compressor a bit more expensive and the main inverter assembly a bit less so (containing no A/C drive circuit any more, after all), [edit: and] it seems that [edit: is] what happened.

    -Chap
     
    #3 ChapmanF, Jun 10, 2015
    Last edited: Jun 10, 2015
    CR94 likes this.
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