Abstract: Based on a theoretical analysis of RLC oscillating circuit, the paper elaborates the demagnetization principle of ferromagnetic materials, discusses the working process and the function of components of digital pulse demagnetizer.Its innovation point lies in that it realizes a flexible regulation of charge and discharge intensities via key input, LCD display and monolithic integrated circuit control, making it suitable for the demagnetization of iron powder, lump and particles with various quantities of magnetism.

Key words: Demagnetizer, Magnetic field intensity, Pulse