Abstract:The pulsed eddy current testing (PECT) attracts increasing attention because it is sensitive to different depth defects and has advantages of low power dissipation and abundant frequency spectrum. Recent studies apply current excitation based pulsededdy current for metal material testing. Due tothe inductance to the coil,it leads to a largereverseinducedelectromotiveforceina drivercoilattherisingand fallingedges ofpulseexcitation.Thephenomenon meansthathighperformanceofpower and stability shouldbe utilized for testing. To solve the aforementioned problems of the excitation circuit, a voltage excitation based ferromagnetic casing PECT method is proposed. The timedomain analytical solution of the testing is formulated. The influences of the selfinductance of the driver coil and the casing eddy current on the excitation current have been analyzed. Then, a more precise pulse excitation function is used for the calculation of the analytical solution. And the analytical solutions of the induced electromotive force to pickup coils are formulated based on the superposition of the excited and induced magnetic field. Finally, experimental results indicate that better accuracy is achieved based on the proposed analytical solutions. The relative errors of excitation current and induced electromotive force between the theoretical and experimental results are 29% and 96%, respectively.