Nubira IP Harness Current Distribution

Nubira IP Harness Analysed Power and Signal Distribution System Performance Verification Test Report Obtained mean currents for 77 out of 207 wires Max current 28A *(for currents less than fuse rating) Only 10% circuits above 10A 60% circuits below 1A

Estimate of FPC Width (Single Sided) Assumptions –All 207 tracks running parallel –1A per mm –1mm between tracks Result –1.16m required, but –Highest current 10% of tracks account for 90% of width

Circuits above 10A

Proposals for Prototype

Construction Option 2: A complex central core (PTH, double sided) Simpler arms Split space model up to represent this option Some surface mount on central core

Core 721mm1055mm

Tests Power up all tracks to rated current Measure T rise, V drops Chattering relay test

Features Operate components via harness, eg: –Meter set –Headlight –Radio and speakers –Windscreen wipers

Features 42V tracks CAN tracks Circuit requiring soft switch and surface mounted ICs eg: digital dimmer for headlight?

Issues How to achieve internal inter-panel connections?