Delta’s new PWM (pulse-width modulation) regulates the voltage signal between fully on and fully off, controlling the speed of a fan. The PWM function is commonly used in OEM cases. Delta also provides standard PWM through distribution channels. Delta’s internal PWM signal control fans deliver a variety of advantages over external PWM controlled devices, such as wide PWM frequency range input (30Hz- 30kHz), lower vibration at lower duty cycle, spike current on fan speed control prevention, better motor efficiency, and lower fan switching noise.
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Electronics Cooling magazine has been providing a technical data column since 1997 with the intent of providing you, the readers, with pertinent material properties for use in thermal analyses. We have largely covered the most common materials and their associated thermal properties used in electronics packaging.
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