V-shaped ultrasonic linear motor driving power supply and driving method thereof

Abstract

The invention provides a V-shaped ultrasonic linear motor driving power supply. Commercial power is boosted by a half-bridge boost circuit and then rectified by a rectifying circuit to obtain high-voltage direct current isolated from the commercial power, a filtering and voltage reducing circuit filters the high-voltage direct current, the filtering and voltage reducing circuit comprises two capacitors which are connected in series, a voltage division is formed by series points, and the voltage division is adjustable in size. An adjustable direct-current voltage stabilizing source is obtainedand used for driving the voltage through static deformation of the piezoelectric ceramic in the micro-displacement movement process; the filtered high-voltage direct current and the adjustable directcurrent voltage stabilizing source are connected to a half-bridge output circuit; a controller adjusts the half-bridge boost circuit, the filtering and voltage reducing circuit and the half-bridge output circuit through a drive circuit, and provides stable direct current bias adjustable alternating current pulse voltage or adjustable direct current voltage for an ultrasonic linear motor. Accordingto the invention, two motion states of rapid stepping motion and micro-displacement motion in the field of precision positioning can be realized, a motor control system is simplified, and the stability is improved.

Description

technical field [0001] The invention relates to the research field of driving power for an ultrasonic linear motor, in particular to a driving power supply for a V-shaped ultrasonic linear motor and a driving method thereof, and is particularly suitable for driving a V-shaped ultrasonic linear motor in a large stroke and precise positioning. Background technique [0002] V-type ultrasonic linear motor is a new type of device that converts high-frequency mechanical vibration generated by piezoelectric ceramics under the action of driving voltage into linear motion of the motor rotor. It is mainly suitable for machining, precision control and other fields. [0003] As a mechanical vibration-linear motion conversion device, the V-type ultrasonic linear motor has a very different structure from conventional motors, and there are special requirements for the driving power supply. So a good driving power supply is very important to the performance of ultrasonic linear motor. At p...

AI Technical Summary

Problems solved by technology

At present, there are many designs of driving power supplies for ultrasonic linear motors, but the organic combination of stepping motion and micro-displacement motion has not been realized, nor has the fine-tuning of the preload force of ultrasonic linear motors been realized, and the potential of ultrasonic linear motors has not been brought into full play.

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