In 42 volt electrical systems, pulse width modulation, commonly known as PWM, will have a major role. PWM can be used in the lighting system to reduce the need for DC/DC voltage conversions. PWM can also be employed to reduce the destructive effect of arcing. In motor systems, PWM can be used to perform both voltage conversion and speed control. This paper will show the results of testing of PWM in these applications. As the automotive industry moves closer to a 42V system, solutions are needed in order for the transition to occur. As shown throughout this paper, PWM can be applied to lighting, EDS, and motors to provide solutions. Preliminary PWM testing results indicate that: Bulb life using 42V PWM exceeds bulb life at 14VDC; 42V PWM for lighting systems meets SAE J1113-41 class 1 limits for narrowband radiated emissions; for resistive loads, a PWM system at 100 Hz can reduce the duration and size of both series and parallel arcing by cutting off the flow of electrons that are needed to sustain an arc. However, different frequencies and inductive loads may yield different results, so future tests will be conducted using these other parameters; 12V DC motors powered by 42V PWM can work properly and the overall system performance at 42V PWM can meet or exceed that at 12V DC.
Summary of 42V PWM testing results
Zusammenfassung der Prüfergebnisse mit der 42V-Pulsbreitenmodulation
2002
13 Seiten, 8 Bilder, 8 Tabellen, 3 Quellen
Conference paper
English
Summary of 42V PWM Testing Results
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