Author Topic: Magnetic field measurements on disc magnets  (Read 174 times)

Offline Physikfan

  • High Voltage Enthusiast
  • *
  • Posts: 34
  • Karma: +0/-0
    • View Profile
Magnetic field measurements on disc magnets
« on: June 27, 2018, 06:34:22 AM »
The magnetic flux density was measured at the surface of permanent disc magnets by a Hall probe:

Disc magnet 30mm diameter, height 15 mm, NdFeB:




Results:

Disc center 0.44 T
1 cm distance 0.2 T
2 cm distance 0.06 T
Edge up to 0.5 T
Side part of the disc (curved) 0.06 T

Disc magnet 45 mm diameter, height 30 mm, NdFeB:




Results:

Disc center 0.52 T
1 cm distance 0.28 T
2 cm distance 0.14 T
edge up to 0.6 T
side part of the disc (curved) 0.06 T

Offline Mads Barnkob

  • Administrator
  • High Voltage Senior
  • *****
  • Posts: 765
  • Karma: +5/-0
  • Denmark
    • View Profile
    • Kaizer Power Electronics
Re: Magnetic field measurements on disc magnets
« Reply #1 on: July 01, 2018, 10:30:49 AM »
I got a N42 disc round neodymium magnet, 50 mm diameter and I think its 25 or 30 mm thick. I bought it to demonstrate induced currents in a copper pipe, where the magnets fall is slowed down by the induced current and resulting magnetic field in the pipe. It was "rated" for being able to lift 140 kg.

I really got to get around to do a video on that :)
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

High Voltage Forum

Re: Magnetic field measurements on disc magnets
« Reply #1 on: July 01, 2018, 10:30:49 AM »

 


* Recent Topics and Posts

post Re: Building of my first tesla coil
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
Today at 09:30:02 AM
post Re: Building of my first tesla coil
[Dual Resonant Solid State Tesla coils]
Skylex86
Today at 02:00:31 AM
post Re: My second DRSSTC
[Dual Resonant Solid State Tesla coils]
erdal
October 18, 2018, 11:04:15 PM
post Re: Building of my first tesla coil
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
October 18, 2018, 08:17:55 PM
post Re: IGBT failure in DRSSTC
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
October 18, 2018, 08:02:24 PM
post Re: My second DRSSTC
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
October 18, 2018, 07:47:44 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
profdc9
October 18, 2018, 04:29:11 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
Uspring
October 18, 2018, 12:27:27 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
alan sailer
October 18, 2018, 01:42:14 AM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
alan sailer
October 18, 2018, 01:01:24 AM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
alan sailer
October 17, 2018, 11:58:42 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
alan sailer
October 17, 2018, 11:51:13 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
October 17, 2018, 11:48:25 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
Uspring
October 17, 2018, 06:11:09 PM
post Re: Garden flag pole hit by lightning
[General chatting]
station240
October 17, 2018, 05:48:06 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
Teravolt
October 17, 2018, 03:07:47 PM
post Re: Garden flag pole hit by lightning
[General chatting]
Milnes
October 17, 2018, 12:22:28 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
alan sailer
October 17, 2018, 02:55:18 AM
post Re: Eaton PowerWare 20 kVA UPS teardown
[Electronic circuits]
Mads Barnkob
October 16, 2018, 11:09:33 PM
post Re: Kone Elevator Drive / Teardown, IGBT test, failure analysis
[Electronic circuits]
Mads Barnkob
October 16, 2018, 11:03:39 PM
post Re: Royer induction heater and high current power supply
[Electronic circuits]
Max
October 16, 2018, 10:30:07 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
alan sailer
October 16, 2018, 05:28:36 PM
post Re: Offgrid 48V solar to 24V battery setup
[Electronic circuits]
station240
October 16, 2018, 02:57:07 PM
post Re: Royer induction heater and high current power supply
[Electronic circuits]
kamelryttarn
October 16, 2018, 02:35:32 PM
post Re: looking for PCB creating software
[Printed Circuit Board]
station240
October 16, 2018, 01:56:34 PM
post Re: Eaton PowerWare 20 kVA UPS teardown
[Electronic circuits]
Hydron
October 16, 2018, 01:15:17 PM
post Re: IGBT failure in DRSSTC
[Dual Resonant Solid State Tesla coils]
Felix Bieri
October 16, 2018, 11:54:48 AM
post Re: Eaton PowerWare 20 kVA UPS teardown
[Electronic circuits]
station240
October 16, 2018, 08:52:36 AM
post Kone Elevator Drive / Teardown, IGBT test, failure analysis
[Electronic circuits]
station240
October 16, 2018, 08:48:54 AM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
T3sl4co1l
October 16, 2018, 08:46:52 AM
post Re: Eaton PowerWare 20 kVA UPS teardown
[Electronic circuits]
T3sl4co1l
October 16, 2018, 08:45:29 AM
post Eaton PowerWare 20 kVA UPS teardown
[Electronic circuits]
Mads Barnkob
October 16, 2018, 08:19:50 AM
post My second DRSSTC
[Dual Resonant Solid State Tesla coils]
erdal
October 15, 2018, 02:35:19 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
Uspring
October 15, 2018, 12:24:11 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
Hydron
October 15, 2018, 12:19:01 AM
post Re: Building of my first tesla coil
[Dual Resonant Solid State Tesla coils]
Skylex86
October 15, 2018, 12:06:31 AM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
Teravolt
October 14, 2018, 07:44:44 PM
post Re: Building of my first tesla coil
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
October 14, 2018, 06:52:52 PM
post Re: Tuning Phase Lead / Soft switching
[Dual Resonant Solid State Tesla coils]
Michael_DA
October 14, 2018, 03:45:34 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
T3sl4co1l
October 14, 2018, 05:14:29 AM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
Hydron
October 13, 2018, 10:22:15 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
alan sailer
October 13, 2018, 10:10:25 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
Hydron
October 13, 2018, 08:34:11 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
alan sailer
October 13, 2018, 08:03:43 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
Hydron
October 13, 2018, 04:09:53 PM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
alan sailer
October 13, 2018, 02:25:50 AM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
Hydron
October 12, 2018, 02:06:34 AM
post Re: Size Comparison of Buck vs Phase Shift QCW
[Dual Resonant Solid State Tesla coils]
alan sailer
October 12, 2018, 01:53:36 AM
post Re: Strokes caused by Tesla coils
[Solid state Tesla coils]
pentode
October 11, 2018, 11:12:14 PM
post Building of my first tesla coil
[Dual Resonant Solid State Tesla coils]
Skylex86
October 11, 2018, 09:11:50 PM

Sitemap 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30