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Communication method for real-time monitoring of permanent magnet synchronous motor based on simplified modbus protocol

A technology of permanent magnet synchronous motor and communication method, which is applied in the direction of transmission modification based on link quality, electrical components, adjustment of transmission mode, etc. problems, to achieve the effect of improving the real-time data, shortening the MODBUS protocol, and saving the resources of the control system

Inactive Publication Date: 2019-07-19
INTELLIGENT MFG INST OF HFUT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The MODBUS protocol is a commonly used industrial communication protocol. It supports the communication between multiple slaves and the host at most. The frame format of the standard MODBUS protocol stipulates that there are corresponding functions to facilitate the communication needs of various industrial occasions, but it stipulates that The necessary fault tolerance, retransmission scheme and complex frame structure are too redundant in high-speed data transmission applications, which cannot meet the needs of high-speed real-time communication

Method used

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  • Communication method for real-time monitoring of permanent magnet synchronous motor based on simplified modbus protocol
  • Communication method for real-time monitoring of permanent magnet synchronous motor based on simplified modbus protocol
  • Communication method for real-time monitoring of permanent magnet synchronous motor based on simplified modbus protocol

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Embodiment Construction

[0040] In the present embodiment, a kind of communication method based on the real-time monitoring of permanent magnet synchronous motor of simplified MODBUS agreement is to carry out as follows:

[0041] Step 1. In order to meet the communication speed requirements of real-time monitoring, and to enable the lower computer data, that is, the slave data to be sent continuously at high speed, it is required to simplify and simplify the frame structure, frame capture logic, and execution logic in the standard MODBUS protocol The MODBUS protocol; the standard MODBUS protocol frame structure is shown in Table 1 and Table 2, and the standard MODBUS protocol is based on GB / T19582.1-2008;

[0042] Table 1. Standard modbus protocol downlink frame structure

[0043]

[0044] Table 2. Standard modbus protocol uplink frame structure

[0045]

[0046]

[0047] Step 1.1. Simplify the frame structure, including simplifying the host downlink frame and simplifying the slave uplink fr...

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Abstract

The invention discloses a communication method for monitoring a permanent magnet synchronous motor in real time based on a simplified MODBUS protocol. The communication method is characterized by comprising the following steps: 1, simplifying a frame structure, frame capture logic and execution logic in a standard MODBUS protocol; 2, receiving a host downlink frame; and 3, sending a salve uplink frame. By adoption of the communication method, the requirements of data transmission instantaneity can be satisfied, thereby improving the communication rate and ensuring the timeliness of data.

Description

technical field [0001] The invention relates to a communication method for real-time monitoring of a permanent magnet synchronous motor, in particular to a communication method for real-time monitoring of a permanent magnet synchronous motor based on a simplified MODBUS protocol. [0002] technical background [0003] Permanent magnet synchronous motor is a simple structure, high-efficiency and energy-saving drive motor, which is widely used in electric vehicle drive, industrial transportation, logistics and other aspects. Among them, the permanent magnet synchronous motor driven by sine wave has the advantages of small torque fluctuation and fast response. Real-time monitoring of permanent magnet synchronous motors can facilitate experiments and applications of various motor control strategies. For example, in motor vector control, it is necessary to detect motor speed and motor phase current for magnetic field coordinate transformation calculation and closed-loop control, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L12/40
CPCH04L1/0006H04L1/0007H04L1/0015H04L1/0043H04L1/0052H04L2012/40228
Inventor 蒋晓炜黄康甄圣超孙国强戴智亚
Owner INTELLIGENT MFG INST OF HFUT
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