Design of Pulse Circuit of Exciting Electromagnetic Ultrasonic

A method of exciting electrical pulse for electromagnetic ultrasonic has been proposed which was to solve the key problems exist in electromagnetic ultrasonic test, such as low transduction efficiency and weak signal. Synchronization of magnetic field strength and eddy current excitation and the number of pulses were controlled by zero crossing detection circuit and MCU. A drive signal of the full bridge circuit was generated by UCC3895 chip to control the frequency and duty radio of the signal. Power amplification was realized by the full bridge constitute of IRFP450. The experimental results showed that the system had good stability, the magnetic field strength was adjustabled, and the electromagnetic ultrasonic energy conversion efficiency could be effectively improved.