Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


what is the cause of humming/vibration of a ballast x'former

Views: 1319

arnie

#40106

what is the cause of humming/vibration of a ballast x'former | 2 March, 2006

we are encountering a problem wherein the ballast transformer we built on the pcb produced a vibration or a humming sound.? what is the possible cause on it. what may the problem on the assembly of transformer.

reply »

#40107

what is the cause of humming/vibration of a ballast x'former | 2 March, 2006

Here's some explanations: http://www.psaudio.com/articles/hum.asp

http://www.signweb.com/neon/tips/neontip12.html

We like the 'don't know the words' one.

reply »

Chunks

#40116

what is the cause of humming/vibration of a ballast x'former | 2 March, 2006

A ballast is the device needed to energize fluorescent lamps during operation. In all fluorescent lighting systems, the ballast provides the proper voltage to start the lamp and then regulates the electric current flowing through the lamp to stabilize output.

There are two types of ballast, electromagnetic and electronic. For several years electricians have been installing the electronic ballast when an electromagnetic ballast fails. However, the clear advantage of electronic ballasts has led to the decision in some buildings to make a complete change-over, even though the existing electromagnetic ballasts may still be functioning. Most electronic ones do not make any noise.

Vibration of electromagnetic field causes the humming noise. You can dampen it by making sure it's in the housing tight. You may be getting some noise from the housing itself, as the vibration from the ballast occurs. Also, try changing the bulbs, it may be trying to regulate with a bad bulb, or vice/versa as the ballast may be going bad. Perhaps you are specifying in the wrong wattage bulb? Just a thought.

reply »


RDR

#40120

what is the cause of humming/vibration of a ballast x'former | 2 March, 2006

That was a good reply for someone that has been Dehumanatized! HAHA

reply »

Chunks

#40121

what is the cause of humming/vibration of a ballast x'former | 2 March, 2006

Dehummmmmmmm - anized!

reply »


RDR

#40123

what is the cause of humming/vibration of a ballast x'former | 2 March, 2006

got it!

reply »

Cogiscan Track Trace Control

Reflow Ovens thermal process improvement