USB (Universal Serial Bus)-based communication module and communication method for alternating current servo driver

Abstract

The invention discloses a USB (Universal Serial Bus)-based communication module and a communication method for an alternating current servo driver. The communication module comprises a digital signal processing module, a USB communication module and a USB interface module, wherein the digital signal processing module is connected with the data bus of the USB communication module; the USB communication module is respectively connected with the digital signal processing module and the USB interface module and packages message information between an upper computer and a servo driver into a USB standard communication mode or resolves the message information into parallel data; the USB interface module is connected with the upper computer and the servo driver by a USB cable and transmits message information between the upper computer and the servo driver in the USB standard communication mode. By the adoption of the communication module and the communication method, the functions of online servo parameter modification, motor operation state monitoring and the like can be achieved, and the parameter updating time can reach a microsecond level.

Description

technical field [0001] The present invention relates to a device and method in the technical field of computer communication, in particular to a USB-based AC servo drive communication module and communication method. Background technique [0002] As a motor with simple structure, reliable operation and high efficiency, AC permanent magnet synchronous motor has been widely used in various industrial fields because it can achieve high precision, high dynamic performance, and wide range of speed and position control. The servo drive is an AC permanent magnet synchronous motor drive and control device. With the development of electronic technology and motor control technology, the servo drive has entered the era of full digital after experiencing the development of analog and analog-digital hybrid. The all-digital servo not only overcomes the shortcomings of the analog servo, such as large dispersion, zero drift, and low reliability, but also gives full play to the advantages of...

AI Technical Summary

Problems solved by technology

[0006] The main defect of the existing bus interface for servo drives is that most servo drives do not provide a bus interface connected to the host computer or use a serial interface with a lower transmission rate, so that the user can monitor the operating status of the servo motor and the parameters of the servo system. It is difficult to modify or lack of real-time performance; when adopting a real-time industrial field bus, most industrial field buses require that the industrial computer that controls the entire system have a corresponding special hardware interface, or integrate a dedicated interface board before it can be used for communication , increasing the cost of hardware and technology used, complicating the entire servo system

[0007] After searching the existing technology, it is found that some foreign servo drive products use USB to communicate with the host computer, such as Yaskawa’s ∑V series, which cooperates with the host computer software SigmaWin+ for the installation and trial operation of the servo drive and monitoring the motion status , but cannot issue motion commands in real time;

[0008] Chinese Patent Document No. CN100568130C, titled "Bus Type Full Digital Servo Driver", discloses a servo driver based on Ethernet, but has not yet involved the use of a USB-based communication module and its communication protocol as a full digital servo driver bus content of communication

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