Hi,
Over at PriusChat, a couple of pioneers are testing the 2KW sine-wave inverter that connects to the traction battery. So far, there is one major problem that is being addressed by the vendor.
The traction battery B- connects directly to the case of the inverter. This causes a ground-fault error unless the inverter and its loads are completely isolated from the vehicle chassis. It is also not the type of engineering practice anyone wants to see.
The pioneers have also done good work on finding solid-state, fuses to handle a DC short on the traction battery leads. Ordinary AC fuses and circuit breakers are likely to just make a self-sustained, arc, that does not extinguish.
One pioneer measured the ground fault detection signal:
We haven't gotten an 'all clear' and 'problem fixed' from the vendor, yet. But the quality of power looks very good . . . except for the B- tied to the inverter case. The case-to-AC ground is external so that is a blessing. I don't know if AC neutral is tied to the case.
Bob Wilson
Today
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