Ultrasonic power driving power supply with novel topological structure

Abstract

The invention discloses an ultrasonic power driving power supply with a novel topological structure and solves the problem that the conventional ultrasonic power driving power supply does not adapt to the broad-band work. The power supply system adopts a two-stage transformation structure, i.e. a DC-DC and a DC-AC. The preceding stage DC-DC concretely comprises two parts, i.e. low-voltage direct current DC-AC inversion and high-frequency high-voltage rectification. The inversion part adopts a push-pull topological structure and a fixed frequency PWM control mode, controls turn-on and turn-off of two power MOSFET tubes and inverts the direct current into a square wave alternating current to be boosted and output. The high-frequency high-voltage alternating current is rectified into a high-voltage direct current to be output by the whole bridge. The backward stage DC-AC adopts a transformerless half-bridge inversion structure, inverts the high-voltage direct current to directly output and can adopt PWM and PFM control modes. The power supply cannot consider the difficulties brought by the working range of the transformer, is easy to implement and also has the characteristics of wide power output frequency range and the like.

Description

technical field [0001] The invention belongs to the technical field of driving power supply for ultrasonic transducers, and in particular relates to a new topology driving power supply for ultrasonic power. Background technique [0002] Ultrasonic transducers convert electrical energy at ultrasonic frequencies into ultrasonic energy. Its applications include ultrasonic cleaning, ultrasonic welding, and ultrasonic power equipment such as ultrasonic motors. There is an increasing demand for ultrasonic power drive power in the industry. For example, the ultrasonic motor is a new type of motor that is different from the traditional electromagnetic motor. It has unique advantages such as being short, small, and thin with or without electromagnetic interference. It has broad applications in the fields of aerospace, biomedical, precision industrial instruments, and robots. Application prospect. [0003] As an actuator, the ultrasonic transducer needs a good driving device—ultraso...

AI Technical Summary

Problems solved by technology

Combined with the existing research status of ultrasonic transducer drive power supply, it is concluded that the output stage of the current ultrasonic transducer drive power supply adopts a circuit structure output with a transformer, so although there are ultrasonic transducer drivers that use single-chip microcomputers and DSP as controllers Power supply, but due to the limitation of the working frequency of the transformer, the output frequency adjustment range of the ultrasonic transducer is extremely small

This affects the research of ultrasonic transducers with different frequency requirements, and also hinders the practical use of ultrasonic transducers

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