i am building a power supply with a transformer. on the secondary side i wanted to know if the negative terminal of the bridge rectifier is connected to ground?
2006-10-19 15:17:20 · 7 answers · asked by uranium_2001 2 in Science & Mathematics ➔ Engineering
ok i realize the output of the rectifier is + and - and these terminals go out into the circuit. + goes to the chip and various other components and - goes to the other end of the components. but is the negative line also connected to a ground point?
2006-10-19 15:36:13 · update #1
You sure have a lot of information to sort through here. The fact is that the choice is yours.
In modern power supplies that are supplying sensitive electronics the negative side of the supply is usually connected to earth ground to help limit short duration high energy spikes that often occur on the grid. If the output is not grounded these spikes may drive instantaneous levels of your rectifier higher than your circuit can tolerate.
Grounding one side (either plus or minus) also allows you to ground other areas of the supply such as the filter network at different locations to further reduce electrical noise.
If your circuit is not so sensitive to fluctuation you can leave it float with no ground. Any battery powered device operates floating all of the time with great results.
You need to determine if electrical noise (air born or line born) is causing a problem with with your device and then try adding grounding to reduce it.
Grounding the output of a non sensitive device like a battery charger will hot help anything and may make for a safety issue.
2006-10-22 13:45:35 · answer #1 · answered by Buffertest 3 · 0⤊ 0⤋
no
the input to the rectifier comes from the transformer ,the output of the rectifier is + and - but not ground
People confuse the - with ground its not the same...ignore the fuzzy guy he is wrong. To explain all this would take a while but the answer to your question is no its the negative side just like a battery not ground.
2006-10-19 22:23:10 · answer #2 · answered by Psycmixer 6 · 0⤊ 0⤋
Yes, in that happens only a vehicle electrical system. Ground here does not mean earth but the body of vehicle which is connected to the negative side of the source. If you connect the negative terminal to the earth it would be useless because it is huge sink .How can you have a good power supply if the negative terminal is connected to earth , there must be a good connection to attain a good voltage. Remember that in DC power supply inorder to have a voltage there must a positive side and negative side .
2006-10-20 06:07:40 · answer #3 · answered by yar2005 2 · 0⤊ 0⤋
If this is line-operated equipment, you would not ground the negative terminal of the rectifier to the chassis of the equipment.
However, you would, of course, connect the negative terminal to the "ground" of a pc board you were running off of it.
A better way to state this is:
The equipment ground of the chassis of this power supply is the ground of the house or building ( the green or bare wire of the AC supply).
The rectifier's negative terminal is the DC ground and is totally separate from the AC supply's ground.
2006-10-19 22:28:31 · answer #4 · answered by Ren Hoek 5 · 0⤊ 0⤋
It could be your established ground potential. It would be the more negative of the two in a floating system; this is the double anode side of the rectifier circuit. The double Cathode side would be the more positive of the two direct current outputs.
2006-10-19 22:39:41 · answer #5 · answered by Lasr Lars 1 · 0⤊ 0⤋
Your bridge isn't actually connected to ground. However, the output of your circuit will be connected to ground.
2006-10-19 22:19:59 · answer #6 · answered by jerryjon02 2 · 0⤊ 0⤋
are you building a negative ground system?? or negative return as some people say?? then yes!!
2006-10-19 22:20:42 · answer #7 · answered by fuzzykjun 7 · 0⤊ 0⤋