This article describes the effects of a future 42V automotive electrical system on the vehicle electronics, focusing mainly on the consequences for power semiconductors and their associated technologies. Taking the example of a door module, it then shows how Existing 14V loads can be operated on the 42V PowerNet And what advantages result for operation of adjusted 42V Loads. The following different problem-solving Approaches are presented for typical loads such as Power windows, electrically positioned and heated Outside mirrors, and central locking: · Power windows: A test motor specially developed for the 42V supply is continuously operated directly form the electrical system using suitable power semiconductors. · Central locking: A conventional 14V motor is operated at 42V, its operating point being set using pulse width modulation (PWM). · Remaining door module: Smaller 14V mirror motors and the control electronics are supplied form a second 14V system. This second supply can be taken from the current 14V system or generated locally by appropriate switching regulators, or even by a central DC/DC converter form 42V.
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