Ultrasonic wave power source for driving magnetostrictive transducer

Abstract

The invention provides an ultrasonic wave power source for driving a magnetostrictive transducer. The ultrasonic wave power source comprises a rectifying filtering circuit, a power inversion circuit, a low pressure control triggering circuit for outputting a control signal of a power switching tube in the power inversion circuit and a matching and load regulation circuit, wherein the matching and load regulation circuit comprises a high frequency output transformer T, and the primary side of the high frequency output transformer T is connected with the power inversion circuit. The improvement of the ultrasonic wave power source provided by the invention is as follows: the matching and load regulation circuit also comprises a diode D and a resistor R5, and the diode D and the resistor R5 are connected in parallel so as to be connected in series with the magnetostrictive transducer in an auxiliary side loop of the high frequency output transformer T; the ultrasonic wave power source provided by the invention can be used for realizing the purpose that an electric current flowing the magnetostrictive transducer is a plus-minus semi-revolution dissymmetry alternate current, a direct-current channel is not needed to be additionally increased, and the transducer can normally operate in a bias magnetic state; and the driving circuit of the magnetostrictive transducer is simplified.

Description

technical field [0001] The invention relates to an ultrasonic power supply, in particular to an ultrasonic generator for driving a magnetostrictive transducer. Background technique [0002] At present, power ultrasonic is widely used in cleaning, welding, extraction of active ingredients of plants, sonochemistry and other fields. Ultrasonic waves used in industry are usually converted by electromagnetic waves of a certain frequency through transducers. The ultrasonic transducer includes a power supply part and a transducer part, wherein the transducer includes a piezoelectric transducer and a magnetostrictive transducer. Piezoelectric transducers have high energy conversion efficiency and low cost, and occupy a dominant position in the market. However, even if its energy conversion efficiency is high, it is still unavoidable to generate heat due to the dielectric loss and mechanical loss of the transducing material during the working process of the transducer. An increase...

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Problems solved by technology

The disadvantage of this is also obvious. Due to the addition of a DC path, the cost of the power supply is high and the volume is large, which is the main reason hindering the application of the magnetostrictive transducer.

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