Fan buzz progressive dynamics 4645-
I've installed two of these converters (orig and replacement). Both exhibit buzzing variable speed fans. 1. Nothing wrong with the fans themselves-when they operate, they're quiet. 2. Occurs wh...
Forum Discussion
I'm interested in how it goes.
Mine has Sunon fans. Evidently these brushless fans have a small switching power supply to operate them built into the fan. Then whatever is driving the fans may not be well filtered power supply. Result is at fan startup clicking and humming.
I'd be tempted to try a large filter capacitor but have some concerns about unusual loads for the fan driver. Possibly other fan mfg would start up more silently than the Sunon fans-perhaps the humming and noise is being generated in the fan itself-just a sign of running far under the specified voltage.
Almost anything covers up the fan sounds at this point-AC, traffic noises etc. But in silent conditions it is noticeable.
Mine has Sunon fans. Evidently these brushless fans have a small switching power supply to operate them built into the fan. Then whatever is driving the fans may not be well filtered power supply. Result is at fan startup clicking and humming.
I'd be tempted to try a large filter capacitor but have some concerns about unusual loads for the fan driver. Possibly other fan mfg would start up more silently than the Sunon fans-perhaps the humming and noise is being generated in the fan itself-just a sign of running far under the specified voltage.
Almost anything covers up the fan sounds at this point-AC, traffic noises etc. But in silent conditions it is noticeable.
