Constant power driving power supply and driving method based on arm and multiplier

Abstract

The invention relates to the technology of ultrasonic power supplies and provides constant-power power supply with a high power factor and fast response to reduce system complexity and improve detection precision. To this end, the invention provides a constant-power driving power supply based on an ARM and a multiplier and a driving method, The constant-power driving power supply comprises a firstpart which is a driving circuit including a DDS chip, an integrated PWM wave control chip and an inversion amplification circuit; a second part which is a sampling matching circuit; a third part which is a signal conditioning circuit; and a fourth part which is a micro-control module formed by an ARM microprocessor and achieving constant-power control by adjusting the frequency and the duty ratioof a PWM wave. The invention is mainly applied to the design and manufacture of ultrasonic power supplies.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to the technical field of ultrasonic driving power supplies, and relates to a constant power ultrasonic driving power supply based on ARM and multipliers. Background technique [0002] Based on electronic technology and computer technology, ultrasonic technology is widely used in machinery, aviation, electronics, materials, medicine and other fields, and is an internationally recognized high-tech field. Ultrasonic drive power supply, referred to as ultrasonic power supply, converts the mains power with a frequency of 50Hz and a voltage of 220V or 380V into an alternating current with a frequency of more than 20kHz and a voltage of hundreds to thousands of volts, and provides high-frequency energy to the ultrasonic transducer. It is the core component of the ultrasonic system. Partly, the performance of the ultrasonic power supply directly determines the performance of the ult...

AI Technical Summary

Problems solved by technology

[0005] For a long time, scholars at home and abroad have conducted extensive research in the field of ultrasonic power supplies, which have greatly improved the performance of ultrasonic power supplies, but there are still some shortcomings. Under different conditions, the power after frequency tracking varies greatly; 2) Due to the error of the tuning and matching circuit, the power factor of the system after frequency tracking is low, which does not meet the relevant national regulations and increases the heat generation of the drive circuit; 3) the existing The constant power control ultrasonic power supply adopts the stepping method to adjust the power, and the adjustment speed is slow, so it is not suitable for occasions with severe load changes.

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