Home     Contact     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS     Terms of services     Privacy policy  
 Home      Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science   

<< Back to INDEX

Troubleshoot A Flyback Supply That Generates Audible Noise [Education]
posted June 26 2014 15:15.42 by spic0m

Peter Vaughn writes a very informative article about audible noise generated by a flyback supply:

"While switch-mode power supplies operate at frequencies well above the range of human hearing, they can produce audible noise under certain load conditions. Potential sources of audible noise can vary widely. Noise can be the result of design flaws such as an oscillating output voltage, or it can be generated by noisy components such as capacitors or transformers. In some cases, the high-pitched whine or hissing noise you hear can be something as simple as a cooling fan oscillating at an unusual frequency or the supply 19s proximity to an external electromagnetic interference (EMI) source such as a fluorescent light or another converter causing a beat frequency due to the interaction of the two. With today 19s need for reduced standby power, converters often employ lower average switching frequency modes, which also tend to increase audible noise.

Here is an approach to troubleshooting the most common sources of audible noise in flyback power supplies, along with potential solutions to the problem. All of these procedures can be conducted with an electronic load and a programmable ac source or Variac. Keep in mind that in some cases the audible noise your supply is generating may be so low that it will not present an issue if the power supply is intended for use in a sealed enclosure."

Read whole article here.

[Link: electronicdesign]

You might also like...

10 Ways Humans are likely to Evolve [Future]

Solar Power will be Cheaper than Fossil Fuels within 2 Years

This is what your body will do in the next 30 seconds [Facts]

Why leap years exist [Random Knowledge #26]

This is how sitting can kill you

Two great discoveries of the past that you may not know [History]

More lethally-geeky jokes for maths [Mathematics]

Five not-so-popular reasons to quit smocking [Health]

<< Back to INDEX



  Email (shall not be published)


Notify me of new posts via email

Write your comments below:
BEFORE you post a comment:You are welcome to comment for corrections and suggestions on this page. But if you have questions please use the forum instead to post it. Thank you.


No comment yet...

Be the first to comment on this page!

 Contact     Forum     Projects     Experiments     Circuits     Theory     BLOG     PIC Tutorials     Time for Science     RSS   

Site design: Giorgos Lazaridis
© Copyright 2008
Please read the Terms of services and the Privacy policy