Art,
Great questions (parallel controllers? serial controllers?)
One concern with serial-ing two or more motor controllers: grounding. The controller of the higher voltage band would not use the same Gnd, probably making the case "hot" in terms of being 36v or 48v above boat ground or traction battery ground or motor ground or dock ground or water ground. There are likely more concerns.
I thought parallel-ing would work until JamesCook? pointed out some balancing/feedback challenges.
Additionally, it is not just the Amperage rating of equipment that deserves heeding; higher voltage requires thicker insulation and greater clearance between circuits on Printed Circuit Boards and almost all their individual components. Higher voltage jumps gaps easier, regardless of the Amperage or width of the river of electrons. All those internal components are rated to maintain their integrity in both net speed (voltage) and volume (amperage) of electrons. Exceed those ratings to get a one-time peak at the magic smoke.
Mark Stafford
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Posted by: mstafford@natca.net
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