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I am currently in the early stages of a ground up project. The end result will be a home built road registered EV.
I got thinking about isolation between the drive train and the chassis. Being DC there is expected to be some leakage through the commutator. There are limits to the allowable leakage. So I was hoping to improve my chances of passing the test by maximising the chassis isolation. I am thinking through all the points of contact to understand where I can/can't isolate. Here is my thinking.
Does anyone have any experience/results from undertaking a similar exercise?
I got thinking about isolation between the drive train and the chassis. Being DC there is expected to be some leakage through the commutator. There are limits to the allowable leakage. So I was hoping to improve my chances of passing the test by maximising the chassis isolation. I am thinking through all the points of contact to understand where I can/can't isolate. Here is my thinking.
- The DC motor and gearbox will be mounted together so conductivity between the two will be high.
- The gearbox and motor mounts will be rubber mounted so the isolation there should be fairly good.
- There will be gear shift with cables. I need to double check but I think they have isolation at both ends.
- The Handbrake cable would be conductive. But maybe I can isolate at the handle end.
- The brake lines are rubber but I suspect the fluid will be somewhat conductive? Maybe I can isolate at the peddle end.
- The drive shafts are metallic and would conduct through to the hubs. But the hubs are isolated with bushings in the control arms.
- The shocks too are isolated with bushings at each end.
Does anyone have any experience/results from undertaking a similar exercise?