How to obtain the magnetic force?? Hi , I didn't have any experience to design coil and permenent magnet . Now i have to do one project using coil and magnet NdFeB. But i haven't got the maximum force. (need maxi force between 1300 to 2500) I am doing the below procedure. Is it correct??? using DC supply 48V, known value :core internal and external diamer, length 1. choose the wire size (From AWG spec) 2. calculate the number of turns / layer (turns/inches * core length) 3. calculate the number of layers (turns / inches * core thickess) 4. calculate total no of turns (Step 2 * Step 3) 5. calculate the wire length (using AWG spec's : ohm / km) 6. calculate the resistace and current. 7. calculate the B using (B = u0 * N*I/L) 8. calculate Force using (F=B*I*L(length of wire)). Do i need to consider NdFeB magnet mass and B in this calculation??? How can i get the force?? Anybody helps me? Thanks in advance for the help.