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Network control method of induction machine and device thereof

An induction motor and network control technology, applied in the direction of electrical program control, comprehensive factory control, comprehensive factory control, etc., can solve problems such as difficult to meet, limited transmission distance, etc., achieve fast dynamic response, high power factor, and convenient network reloading structure effect

Inactive Publication Date: 2011-08-17
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional control system mainly adopts the following two communication methods: one is based on industrial control interfaces (such as serial port, parallel port, PCI and USB), but this method can only realize data transmission in a short distance; the other is based on field bus, but Fieldbus can only transmit a small amount of data, and the transmission distance is limited, which is difficult to meet the applications that require large-capacity long-distance data transmission

Method used

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  • Network control method of induction machine and device thereof
  • Network control method of induction machine and device thereof
  • Network control method of induction machine and device thereof

Examples

Experimental program
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Effect test

specific Embodiment approach

[0067] 1. The induction motor in the network control device is driven by an all-digital control frequency converter, and the control system adopts an advanced embedded microcontroller / processor TMS320F2812 and its supporting software CCS3.1, so all physical parameters during the operation of the motor can be networked Intelligent and intelligent real-time control, all-digital AC motor control adopts space vector pulse width modulation technology SVPWM, so that the three-phase AC asynchronous induction motor can achieve high-efficiency operation. The specific implementation method is:

[0068] figure 1 It shows the structural diagram of the induction motor network control method, which consists of the following parts: upper computer 101 , Ethernet 102 , front-end controller 103 , frequency converter 104 , motor 105 and sensor 106 . Wherein the upper computer 101 is an ordinary PC, the upper computer 101 communicates with the front-end controller 103 through the Ethernet 102, a...

Embodiment

[0082] A network control method and device for an induction motor, as attached figure 1 As shown, only one inverter-motor system is connected to the Ethernet. The device includes a PC, the Ethernet transmission medium adopts ordinary network cables, the upper computer and the front-end controller are connected through the communication interface RJ45, the main controller of the front-end controller adopts TMS320F2812, the Ethernet controller is CS8900, and the frequency converter-motor system adopts ordinary The asynchronous motor is driven by an all-digital control frequency converter. The motor model is a domestic YZR90 three-phase squirrel-cage Y-connected asynchronous motor. The ratings are as follows:

[0083] Rated power: P N =550W

[0084] Rated voltage: U N =220V (effective value of line voltage)

[0085] Rated current: I N =2.3A

[0086] Rated speed: n N =1450rpm

[0087] Rated torque:

[0088] Number of pole pairs: n p = 2

[0089] as attached Figure 4...

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Abstract

The invention relates to a network control method of an induction machine and a device thereof. The method and the composition of the device are as follows: an upper computer is communicated with a front controller by Ethernet; the upper computer sends induction machine control instruction to the front controller by Ethernet; the front controller sends control instruction of PWM modulation signalto a frequency converter according to the control instruction sent by the upper computer; the frequency converter is used for driving an electric motor; a sensor group examines the state parameter ofthe electric motor and transmits the state parameter to the front controller; the state parameter is sent to the upper computer for display after being processed by the front controller; the upper computer communicates with a front computer by an Ethernet communication method based on TCPIP protocol, wherein, both the upper computer and the front computer set up TCP connection, realize data communication and release TCP connection.

Description

technical field [0001] The invention relates to the control field of induction motors, in particular to a network control method and device for induction motors. Specifically, it is an induction motor network monitoring method and device based on Ethernet. Motor control instructions and operating state parameters are interactively transmitted between the front-end controller and the host computer through Ethernet, thereby realizing online real-time monitoring of the operating state of the motor. Background technique [0002] Induction motor is widely used in industrial production, transportation and other industries due to its simple structure, low cost, reliable operation and convenient maintenance. It is an important power equipment. [0003] At present, the degree of automation of existing modern motor control is increasing day by day, and the system maintenance personnel are less and less. Centralized monitoring of equipment operation status and automatic fault diagnosis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/08G05B19/418H04L12/28
CPCY02P90/02
Inventor 张和生王金东郑巨明叶华
Owner BEIJING JIAOTONG UNIV
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