DEVICE FOR AUTOMATICALLY EXCITING AND STABILISING RESONANCE OSCILLATIONS OF ULTRASONIC SYSTEMS

摘要

The invention relates to production process automation and is directed at producing mechanical ultrasonic oscillations by using electric energy. The inventive oscillation exciting device with automatic frequency adjustment during operation comprises an electroacoustic converter connected to an amplifier, which is integrated into a feedback circuit, and a power supply. The device is provided with a current intensity sensor arranged in the power circuit of the electroacoustic converter which is formed by means of the feedback circuit provided with a phase shifter. The input of the phase shifter is connected to the current intensity sensor and the output thereof is connected to the amplifier input, the device exhibiting a high stability and making it possible to increase operational load.