Ultrasonic motor driver

Abstract

The invention provides an ultrasonic motor driver. The ultrasonic motor driver comprises a processing module, a two-phase power amplification and matching module, a controllable clock module, a feedback signal collection module and a current detection module; clock signals output from the controllable clock module are output to the two-phase power amplification and matching module to perform matching processing after being processed through the processing module; the clock signals after matching drive the ultrasonic motor to work; the feedback signal collection module feeds back collected speed signals of the ultrasonic motor to the processing module; the processing module processes the feedback speed signals and outputs control signals to the controllable clock module to adjust an output clock of the controllable clock module, so that control targets of motor speed high performance and high stability are achieved.

Description

technical field [0001] The invention relates to an ultrasonic motor driver and belongs to the field of ultrasonic motor drive control. Background technique [0002] Ultrasonic motor is a kind of motor in which piezoelectric ceramics act to cause periodic traveling waves of submicron deformation of elastic body, and then perform work through friction. Compared with traditional motors, ultrasonic motors have the characteristics of low speed, large torque / mass ratio, fast response, self-locking when power failure, nanoscale resolution, and no electromagnetic interference. [0003] Ultrasonic motors need to be driven by two quadrature phase ultrasonic frequencies provided by the ultrasonic motor driver. At present, the existing ultrasonic motor driver with all discrete components can realize the start / stop and speed regulation of the motor, but it cannot realize the communication with the host computer, and the use of discrete components makes the volume of the driver relativel...

AI Technical Summary

Problems solved by technology

[0005] The driver disclosed in this patent is a drive controller with an embedded microprocessor as the core, which belongs to the digital driver. Although it effectively solves the shortcomings of the analog driver that cannot communicate with the upper computer and digital control, due to the digital driver operating frequency It cannot be increased without limit, so when it is close to the resonance point of the motor, there are shortcomings such as insufficient frequency resolution and dispersion, so the control frequency cannot be very fine, resulting in low control accuracy of this type of controller, and small changes in the frequency division ratio It will cause the motor speed to fluctuate greatly, which affects the stability of the motor speed.

Images