A V-shaped ultrasonic linear motor driving power supply and its driving method

Abstract

The invention discloses a V-type ultrasonic linear motor drive power supply, in which the mains power is boosted by a half-bridge booster circuit and then rectified by a rectifier circuit to obtain a high-voltage direct current isolated from the mains power. Filtering, which includes two capacitors in series, the series point forms a partial voltage, the size of which is adjustable, and an adjustable DC stabilized voltage source is obtained, which is used as the driving voltage for the static deformation of the piezoelectric ceramic during the micro-displacement movement; the filtered The high-voltage direct current and adjustable direct current voltage source are connected to the half-bridge output circuit; the controller regulates the half-bridge boost circuit, filtering and step-down circuit and half-bridge output circuit through the driving circuit, so as to provide stable direct current for the ultrasonic linear motor Offset adjustable AC pulse voltage or adjustable DC voltage. The invention can realize two motion states of fast stepping motion and micro-displacement motion in the field of precision positioning, simplifies the motor control system, and improves stability.

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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