Dr. David J. Perreault, a research scientist at the Massachusetts Inst. of Technology (MIT), has come up with a technique offering solutions to problems facing the introduction of 42-volt vehicle electrical systems. The technique uses an alternator design in which the diodes are replaced by three active switches that can be used to optimize current flow to get the high power needed. Conventional alternators are designed to optimize current flow only at idle. At other speeds, they are ...

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