Comments by "ke6gwf - Ben Blackburn" (@ke6gwf) on "Volkswagen ID.4: Electric Motor Teardown and Analysis" video.

  1. You look at this as an electronic tech, but this is an automotive part, and they get swapped out. The old one gets sent to a shop to get remanufactured, and they don't really care how easy it is, because they charge whatever it takes to take it apart and repair it. Just like no one rebuilds their own alternator or puts new seals and bearings in a water pump abymi, but you swap it out with a Reman with a warranty. And most independent shops don't want to touch component repair, because it takes specialized equipment to test and diagnose, and they don't want the liability if an inverter they repaired shorts out and the car burns up. Now, I like fixing things myself, so not being easy to take apart would annoy me, but it doesn't really make sense for the auto industry to worry about a tiny percentage of people when gluing something together can save millions.
    18
  2.  @mikeselectricstuff  you have to remember that Sandy simply hates screws/fasteners, because his focus is on eliminating parts and movements, and sometimes he takes this aversion a little bit too far lol If you remember this, you can filter out the hyperbole a bit better.
    9
  3. Sandy is more of the big picture guy, with a focus on screw count loly, and he has EEs etc on his team to take care of that side, but this video was not about the electrical design, this is not a Big Clive video, and so the exact purpose of the cap isn't important. I suspect he pulled it out starting to describe what it did, and then decided that he didn't need to give that long explanation, so he just gave an answer as of he was talking to a 5 year old lol
    5
  4.  @konasteph  or, mount it to the motor since that's efficient, and then use other means to deal with vibration rather than a bunch of screws. There ARE other options after all. The first thing I thought of, since it's a layered design, just clamp it all together. Put some ridges on the cover with cast in place spacers on each layer that all squeeze together when the cover is tightened down.
    3
  5. I disagree with one thing here, and that's the comments on the Tesla oil cooler. By pumping and cooling the oil, they cool the gears and bearings, not just the motor, and and can pressure lubricate the bearings as well, allowing better control and reliable oil flow, rather than relying on splash lubrication and gravity like this does. It probably also reduces windage, so the gears don't have to throw as much oil around, reducing heating as well as the power loss. I do appreciate the VW design, especially how the power and cooling lines are integrated, unlike the Ford that probably uses 12 hoses lol. The cooling method is good, but it looks like it's primarily for the motor, not the gears and oil, but they are not as high performance as Tesla so it's probably all right for them.
    1
  6. VW is smart, they want the Munro inspection report, but don't want to pay for it, so they send him a motor to do a video on, and take notes! Lol I also guess they were pretty proud of it, and thought it would be good PR.
    1