Simviation Forum - PSU question

Dec 6^th, 2008 at 4:12am

T1MT1M Offline
Colonel
Hello!
Naboo

Gender:
Posts: 398

Question for anyone with a phd in physics or nick Tongue

.

When people wrap their cords around each other and twist them with a PSU, wouldn't this create an electromagnet??

and if so or not so then why?

Back to top

IP Logged

Reply #1 - Dec 6^th, 2008 at 9:11am

Vodka Burner Ex Member

Quote:

In order to concentrate the magnetic field generated by a wire, it is commonly wound into a coil, where many turns of wire sit side by side. The magnetic field of all the turns of wire passes through the center of the coil. A coil forming the shape of a straight tube, a helix (similar to a corkscrew) is called a solenoid; a solenoid that is bent into a donut shape so that the ends meet is a toroid. Much stronger magnetic fields can be produced if a "core" of ferromagnetic material, such as soft iron, is placed inside the coil. The core magnifies the magnetic field to thousands of times the strength of the field of the coil alone. This is called a ferromagnetic-core or iron-core electromagnet.

http://en.wikipedia.org/wiki/Electromagnet

So I guess it does create a magnetic field, just not a strong one.

Back to top

IP Logged

Reply #2 - Dec 6^th, 2008 at 10:34am

NickN Offline
Colonel
FSX runs fine... the problem
is you or your system

Posts: 6317

You’re diving into areas which have outcomes based on each given circumstance however the field potential created in coiling as described is not going to overcome the noise clamping circuits of the devices.

In the case of a PSU there is not enough wire or core element to create any kind of strong field

all living things emit an electrical signal too

sharks have the ability to sense that emission at a distance

Back to top

IP Logged

Reply #3 - Dec 7^th, 2008 at 10:53am

Brett_Henderson Offline
Colonel
EVERY OUTER MARKER SHOULD
BE AN NDB

Gender:
Posts: 3593

This brings back fun memories Cheesy

When CPUs were first breaking the 100Mghz, through the time that a 333Mghz Pentium was was coming out... M/B designers were facing the first, real hurdle in noise control. Heck.. at those amazing frequencies, pc-board conductors themsevles become capacitors.. and a complex curve in those conductors can become an inductor. Remember amateur radio 2-meter band ? 150Mghz +/- and a pipe bent into a 'J' can be an inductive load (antenna).

One appraoch to this, was to try to design noise filtering capacitors/inductors INTO the board. Take advantage of this phenom, rather than fight it.

ANYway... clock speeds have gotten so fast that now it's like worrying about cell phones interfering with AM radio Roll Eyes

.. and things like solid-state capacitors have make filtering circuits rock-stable with tiny band-pass capability..

Insightful question, none-the-less..

Back to top

IP Logged

Reply #4 - Dec 7^th, 2008 at 5:19pm

Fozzer Offline
Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.

Posts: 24861

T1MT1M wrote on Dec 6^th, 2008 at 4:12am:

Question for anyone with a phd in physics or nick Tongue

.

When people wrap their cords around each other and twist them with a PSU, wouldn't this create an electromagnet??

and if so or not so then why?

The majority of Twins within the Womb don't appear to suffer from the problem, and can be delivered quite safely.

The PSU is generally discarded along with the Afterbirth...

F...All your Gynaecological Problems problems answered here... Cool

...!

Dell Dimension 5000 BTX Tower. Win7 Home Edition, 32 Bit. Intel Pentium 4, dual 2.8 GHz. 2.5GB RAM, nVidia GF 9500GT 1GB. SATA 500GB + 80GB. Philips 17" LCD Monitor. Micronet ADSL Modem only. Saitek Cyborg Evo Force. FS 2004 + FSX. Briggs and Stratton Petrol Lawn Mower...Motor Bikes. Gas Cooker... and lots of musical instruments!.... ...!
Yamaha MO6,MM6,DX7,DX11,DX21,DX100,MK100,EMT10,PSR400,PSS780,Roland GW-8L v2,TR505,Casio MT-205,Korg CX3v2 dual manual,+ Leslie 760,M-Audio Prokeys88,KeyRig,Cubase,Keyfax4,Guitars,Orchestral,Baroque,Renaissance,Medieval Instruments.

Back to top

IP Logged

Reply #5 - Dec 8^th, 2008 at 4:26am

T1MT1M Offline
Colonel
Hello!
Naboo

Gender:
Posts: 398

NickN wrote on Dec 6^th, 2008 at 10:34am:

You’re diving into areas which have outcomes based on each given circumstance however the field potential created in coiling as described is not going to overcome the noise clamping circuits of the devices.

In the case of a PSU there is not enough wire or core element to create any kind of strong field

all living things emit an electrical signal too

sharks have the ability to sense that emission at a distance

Yeah thats true becaue the reason why i ask is because we have only ever had one situation of this every going wrong (with the wires wrapped and twisted) but at the shop the one time we have had one like that in it all the wired coming out of the PSU were screwed and melted together lol.

Back to top

IP Logged

Reply #6 - Dec 8^th, 2008 at 8:32am

NickN Offline
Colonel
FSX runs fine... the problem
is you or your system

Posts: 6317

Fozzer wrote on Dec 7^th, 2008 at 5:19pm:

T1MT1M wrote on Dec 6^th, 2008 at 4:12am:

Question for anyone with a phd in physics or nick Tongue

.

When people wrap their cords around each other and twist them with a PSU, wouldn't this create an electromagnet??

and if so or not so then why?

The majority of Twins within the Womb don't appear to suffer from the problem, and can be delivered quite safely.

The PSU is generally discarded along with the Afterbirth...

F...All your Gynaecological Problems problems answered here... Cool

...!

you're a riot Paul Grin

Back to top

IP Logged

Reply #7 - Dec 8^th, 2008 at 8:33am

NickN Offline
Colonel
FSX runs fine... the problem
is you or your system

Posts: 6317

T1MT1M wrote on Dec 8^th, 2008 at 4:26am:

NickN wrote on Dec 6^th, 2008 at 10:34am:

You’re diving into areas which have outcomes based on each given circumstance however the field potential created in coiling as described is not going to overcome the noise clamping circuits of the devices.

In the case of a PSU there is not enough wire or core element to create any kind of strong field

all living things emit an electrical signal too

sharks have the ability to sense that emission at a distance

Yeah thats true becaue the reason why i ask is because we have only ever had one situation of this every going wrong (with the wires wrapped and twisted) but at the shop the one time we have had one like that in it all the wired coming out of the PSU were screwed and melted together lol.

that was not a magnetic field that caused a meltdown... that was someone pulling more power from the PSU than they should have... and/or a defective unit

Back to top

IP Logged

Reply #8 - Dec 8^th, 2008 at 8:38am

T1MT1M Offline
Colonel
Hello!
Naboo

Gender:
Posts: 398

NickN wrote on Dec 8^th, 2008 at 8:33am:

T1MT1M wrote on Dec 8^th, 2008 at 4:26am:

NickN wrote on Dec 6^th, 2008 at 10:34am:

You’re diving into areas which have outcomes based on each given circumstance however the field potential created in coiling as described is not going to overcome the noise clamping circuits of the devices.

In the case of a PSU there is not enough wire or core element to create any kind of strong field

all living things emit an electrical signal too

sharks have the ability to sense that emission at a distance

Yeah thats true becaue the reason why i ask is because we have only ever had one situation of this every going wrong (with the wires wrapped and twisted) but at the shop the one time we have had one like that in it all the wired coming out of the PSU were screwed and melted together lol.

that was not a magnetic field that caused a meltdown... that was someone pulling more power from the PSU than they should have... and/or a defective unit

Yeah thats what i thought but i just agreed with the other guys to make them feel special Tongue

. I was just commenting on the ratio of good vs bad PSU's that have come from the twisted wires. so for it beats it by 100% Tongue

. But i think his agrument would be that he thinks it was the magnetic field that caused something to go wrong in the first place.

Back to top

IP Logged

Reply #9 - Dec 8^th, 2008 at 4:46pm

drummer_tom Offline
Colonel
If to be is to do & to
do is to be. Do Be Do
Be Do
Dunstable, Bedfordshire, UK

Gender:
Posts: 287

Yes it will create an electromagnet. Is it worth worrying about? Not with the little amount of power there is.

One of my hobbies is stage lighting and when I was first starting out I made this mistake. I wrapped a wire which had 2 x 1000w lights on the end very tightly and closely around the lighting bar in the ceiling. However I was explained why this wasn't such a good idea and learned from the experience.

True story!

Back to top

IP Logged

	Search the archive: