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Forum Discussion
yoh-dah
Apr 19, 2007Guide
Service Action to Prevent PSU Failures in ReadyNAS NV/NV+
A Service Action notice has been posted in the Announcement forum to prevent ReadyNAS NV and NV+ systems from premature power supply failures at viewtopic.php?t=10259. If you own a NV or NV+ within t...
Milhouse
Apr 26, 2007Tutor
Clicking will be produced by the fan due to the PWM nature of speed control.
Some fans are designed to eliminate clicking by moving out of the human audible range of hearing.
"The stator motion is a square wave that is switched on and off before and after the peak torque position. This motion causes a small amount of undulation in motor torque, producing an audible noise caused by the lower frequency commutation operation. Each small torque causes a minute contracting of the entire fan structure and results in an audible clicking noise while the fan is operating."
Some fans are designed to eliminate clicking by moving out of the human audible range of hearing.
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