Recent content by PEMF_1

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    Engineering Magnetic field strength of an electromagnet (coil wound around a bobbin)

    To address your points: 1) As I am not interested in reversing the electro magnetic field direction, should I use a iron magnet or a permanent magnet? 2) The reason why I am wanting a 'magnet' (whether it be an iron or permanent) with windings so so that I can adjust the AC frequency of the...
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    Engineering Magnetic field strength of an electromagnet (coil wound around a bobbin)

    What is the shape for which the magnetic field is strongest? The magnet could be either a 'pot' (disk/disc) shape or a cylinder, as long as it fits within through the spool it does not matter. When the wire is fully wound around the disk or bobbin the resulting shape is 'disk' shaped. What...
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    Engineering Magnetic field strength of an electromagnet (coil wound around a bobbin)

    Using this Magnetic calculator on website: https://www.kjmagnetics.com/fieldcalculator.asp, I used, for the NPI75M8-1 magnet (grade: n42, diameter: 2.95inches, thickness: 0.59 inches, and a measurement position of 5cm from object (so X: 2 inches, and Y: 2 inches). The resulting Gauss value was...
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    Engineering Magnetic field strength of an electromagnet (coil wound around a bobbin)

    To make a Do It Yourself (DIY) Pulsed Electro Magnetic Frequency (PEMF) handheld device. This uses electro magnets with a field intensity of 3 Gauss upwards and is placed on the body. Has been known to improve health and general well being. Here is a weblink to the Youtube video I am following...
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    Engineering Magnetic field strength of an electromagnet (coil wound around a bobbin)

    This is the magnet I am thinking of using. Code: NPI75M8-1, description '75mm dia N42 Neodymium Pot Magnet with M8 Internal Thread - 200kg Pull'. Website (if this forum allows it)...
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    Engineering Magnetic field strength of an electromagnet (coil wound around a bobbin)

    I did not know there was such thing as magnet wire. I will use this instead for the coil windings. What type of magnet wire should I use? Yes I am really going to wind this coil. I am actually going to do this. I do not have a coil winder, where would I buy one? I am going to connect the...
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    Engineering Magnetic field strength of an electromagnet (coil wound around a bobbin)

    The plastic spool's inner 'throat' is a hollow cylinder for which the outer walls are 75mm. Here is a weblink to the product (provided this forum will let me post a weblink): https://www.autoelectricsupplies.co.uk/product/985/category/188
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    Engineering Magnetic field strength of an electromagnet (coil wound around a bobbin)

    I am trying to design an electromagnet which consists of a copper PVC sheathed wire wound around a cylindrical plastic spool of Circumference (C) = pi x diameter. The spool has a hollow body of diameter D1. This wire has maximum length (L), cross sectional area A, resistivity P. The spool once...
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