transformer core

  1. J

    Primary Winding for a transformer and need some help

    Hello, So I want to make a welding machine out of 2 Microwave Transformers. I know nothing about Transformers. I saw a how-to guide and some videos. It's kind of my curiosity and strong will to make this because in my country the welders charge a huge amount for some minimal work, I want to do...
  2. U

    How to make small Toroidal Flyback Transformer using Mu-Metal tape for SMPS circuit?

    Hello, I am trying to find some information on building a Toroidal Transformer from scratch, so that I have exact parameters needed and something I would like to learn as a hobby and skill. Please don't say to go buy one, I could if I wanted to but will never know how it is made and why it...
  3. S

    Why is the EI- Core most popular for power transformers?

    Note that the majority of small transformers (single-phase, 100-240V, 50hz/60hz, laminated core) are shell-type, with an EI-shaped core. Yet, as I understand it, they have comparatively poor productivity due to the visibility of much of their surface area; not wire wounds. There is also a lot of...
  4. S

    Why does a transformer transfer power from the primary to the secondary one?

    I'm struggling to keep my mind wrapped around the function of the transformer and, in the process, regretting the days I snooze back in my Electromagnetics class as an EE student when I was a boy:) I'm searching for an abstract explanation, but not just an equivalent one. I want it to be rooted...
  5. Advice to speed up the decay time of an electromagnet when it is turned off please.

    Hello All, I have an electromagnet made from a Microwave oven transformer. I am only using the coil with the thicker wire. I've separated the transformer core into the "E" shaped bit and the "keeper" shaped bit and removed the other coil. When I turn the current off, I would like the attractive...
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