I need help find a electromagnet suitable for this http://imgur.com/a/vkm4T Each electromagnet (the 3 in the center) needs a repelling force of about 20 to 40lbf. I stupidly bought these from amazon http://a.co/aSftIat. Its a holding electromagnet so the N and S poles are essentially on the same plane and are meant to to hold metal sheets. Googling around for other electromagnets bring up hundreds of other holding magnets. Is there a name for the type of electromagnet magnet i have in my design? What do I actually need? Is it even feasible for me to get that much force from each component in the size of say a con of soda?