| With the increasingly wide use of power ultrasonic technology in many areas of national economy, a new type of general high-power ultrasonic power supply is urgently required. The purpose of the thesis is to develop a new type of intelligent high-power ultrasonic power supply, which has many excellent performances . It includes:(1) The article firstly analyses the electrical impedance and working characteristics of ultrasonic vibration system. Based on these, the overall scheme of power supply has been set up and operational principle of control systems has been proposed.(2) The major circuit has been established, composed of rectifier,BUCK-chopper,push-pull inverter and matching network, which realizes high-power supersonic AC output. To achieve maximal output power, the pulse frequency modulation (PFM) has been applied to auto-adjustment of output frequency, which corresponds to the load's resonant frequency. Output power can be regulated through changing the output voltage of BUCK circuit by the pulse width modulation (PWM), with the purpose of the consent specific load' power.(3) The micro-controller(80C196) measurement and control system has been presented, including hardware and software,which implement the real-time electrical data acquisition and accomplish the tasks of two kinds of control systems, which are frequency auto-tracking control system and constant output specific power control system.(4) The man machine interface has been devised, which can show the working status and digitally display multichannel electrical parameters. Via keyboard, users can input the set point of two kinds of auto-control system and manually operate control systems, whose manual/auto switch is unperturbed.(5) Many protective designs have been made in the power supply and a lot of anti-jamming measures have been taken in terms of both software and hardware, aiming at ensuring the power supply to run stably and reliably.
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