Multi-channel phase-shift controller based on fpga

Abstract

The invention discloses a field programmable gate array (FPGA)-based multi-channel phase-shift controller, which comprises a register storage module, a judgment and recognition module and a phase-shift control module, which are serially connected with one another, wherein the register storage module is used for storing data transmitted by a personal computer (PC); the PC communicates with an FPGA chip; the transmitted data are stored in a random-access memory (RAM) of an FPGA chip; the judgment and recognition module is used for receiving the data from the register storage module, judging the type of control words through recognizing high eight bits of the data, and then conveying the control words to different registers; and the phase-shift control module generates the required pulse-width modulation (PWM) waveform according to different types of control words in various registers, so as to meet the drive and control requirements of an ultrasonic motor. The multi-channel phase-shift controller disclosed by the invention is high in frequency modulation accuracy, high in phase modulation accuracy and large in adjustment range, and simultaneously has soft starting and over-voltage protection functions; and a guarantee can be provided for drive and control of the ultrasonic motor.

Description

technical field [0001] The invention belongs to the technical field of power supplies, in particular to a phase-shift controller, which is mainly used for the control of ultrasonic motors. Background technique [0002] Ultrasonic motor is a new principle motor that uses ultrasonic vibration energy as a driving power source. As a brand new driver, ultrasonic motor has many superior properties, such as low speed, high torque, high power density, fast response, and is not affected by electromagnetic fields. Power-down self-protection, can directly drive the load, etc. [0003] Driving an ultrasonic motor requires a special ultrasonic power supply, the driving frequency is required to be within the ultrasonic range, and the frequency, phase and amplitude of the driving voltage are adjustable. [0004] According to the transmission principle of the traveling wave ultrasonic motor, the available control variables are: [0005] 1. Control voltage amplitude. Changing the voltage ...

AI Technical Summary

Problems solved by technology

[0010] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a multi-channel phase-shift controller based on FPGA to solve the problems of signal interference and low adjustment accuracy existing in the prior art

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