Digital full-intelligent ultrasonic generator and automatic frequency correcting method thereof

Abstract

The invention relates to a digital full-intelligent ultrasonic generator and an automatic frequency correcting method thereof. The ultrasonic generator comprises a power supply rectification filtration module, an ultrasonic wave output module, a control module, an ultrasonic wave source frequency generation module and an ultrasonic wave power device control module. The control module controls the ultrasonic wave source frequency generation module to generate ultrasonic wave original frequency signals which are processed by a driving signal dead area time generation module to output to the ultrasonic wave power device control module, and then the ultrasonic wave power device control module outputs the frequency signals to the ultrasonic wave output module. The method comprises wideband rapid frequency scanning, narrow band accurate frequency tracking and full-range tracking resonant frequency during stagnation point working. The digital full-intelligent ultrasonic generator is accurate in frequency, greatly improves work efficiency of the ultrasonic generator, and can effectively avoid self-excitation damage of power module devices. The method can effectively avoid drifting of resonant frequency points and improve resonance efficiency of the ultrasonic generator.

Description

technical field [0001] The invention relates to the technical field of intelligent ultrasonic generators. Background technique [0002] The traditional ultrasonic power supply currently on the market has the following disadvantages, as shown in Figure 1: (1) It uses a transistor analog amplifier OTL / OCL circuit to start, and generates ultrasonic waves through self-excited oscillation. When the start of this resonant frequency depends on the self-excitation of the oscillating circuit, the self-excitation is sometimes unreliable due to the influence of component errors and peripheral conditions, and the vibration cannot be started, and it needs to be turned on and off repeatedly. (2) The ultrasonic power supply generally balances the frequency drift of the device through the additional sawtooth wave. After the device resonates, the operating frequency becomes larger and smaller within a certain range. Since the frequency range is determined in advance by the line, such a Ther...

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Problems solved by technology

[0002] The traditional ultrasonic power supply currently on the market has the following disadvantages, as shown in Figure 1: (1) It uses a transistor analog amplifier OTL / OCL line to start, and generates ultrasonic waves through self-excited oscillation

When the start of this resonant frequency depends on the self-excitation of the oscillating line, sometimes the self-excitation is unreliable due to the influence of part errors and peripheral conditions, and the vibration cannot be started, and it needs to be turned on and off repeatedly.

(2) The ultrasonic power supply generally balances the frequency drift of the device through the additional sawtooth wave. After the device resonates, the operating frequency becomes larger and smaller within a certain range. Since the frequency range is determined in advance by the line, such a Therefore, the operating frequency deviates from the real resonance point in most of the time period. When not working at the resonance point, it often causes waste of power consumption and lower efficiency

In addition, if the working frequency fluctuates, the mechanical vibration will also fluctuate, resulting in unstable working results and affecting product quality.

(3) The ultrasonic wave generated by the self-excited oscillation belongs to the analog circuit control, which is greatly affected by the error of the part itself, which is not conducive to stable batch production

(4) Limited by analog quantity sampling and control, it is not conducive to realize the intelligent automatic control of the whole machine

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