Design of induction-heating coils for cylindrical nonmagnetic loads

EQUATIONS are presented for the calculation of the required number of coil turns to match a given power source for solenoidal coils with coaxial cylindrical loads of nonmagnetic materials in electromagnetic induction circuits. The equations apply to both solid and hollow loads. A correction factor is established for coil shortness providing the coil length is equal to or greater than the coil diameter. Also given are equations for power distribution and impedance values. The accuracy of the calculations is substantiated by experimental results.