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Frequency converter frequency instruction control system

A frequency command and control system technology, applied in general control systems, control/regulation systems, program control, etc., can solve the problem of narrow inverter frequency adjustment range, inability to realize stepless and stepless fusion adjustment, and inability to realize remote control, etc. problem, to achieve the effect of wide speed range and simplified operation and debugging

Active Publication Date: 2015-09-23
SICHUAN CONSTR MACHINERY GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the frequency adjustment range of the existing frequency converter is narrow, remote control cannot be realized, and stepless and stepless fusion regulation cannot be realized

Method used

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  • Frequency converter frequency instruction control system

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Embodiment

[0022] The composition and connection relationship of the inverter frequency command control system will be described as an example below in conjunction with the embodiment.

[0023] Take the frequency conversion mechanism debugging control system of Sichuan Construction Machinery Co., Ltd. as an example, such as figure 1 As shown, the frequency command control system includes: linkage station control module, power supply module, PLC control module and frequency control module. The frequency control module is a LAB circuit controller. The linkage control module includes an operating handle, a potentiometer and a micro switch unit. The operating handle is connected to the potentiometer and the micro switch unit. The power module is connected to the micro switch unit. connect. The micro switch unit is connected to the PLC control module through the PLC input and output module, which specifically includes the first gear speed micro switch, the second gear speed micro switch, the...

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Abstract

The invention relates to an electrical equipment control technology, and aims to solve the problem that remote control and stepped-stepless integrated adjustment cannot be realized due to narrow frequency adjustment range of the existing frequency converter. The invention provides a frequency converter frequency instruction control system comprising a PLC control module, a linkage platform control module, a frequency control module, and a power module. The PLC control module is connected with the linkage platform control module and the frequency control module, and the power module is connected with the linkage platform control module. The linkage platform control module is used to provide frequency instruction signals including a stepless speed adjustment voltage signal and a stepped speed adjustment switching signal. The PLC control module is used to analyze the frequency instruction signals provided by the linkage platform control module and determine to output a signal of a certain gear to the frequency control module. The frequency control module is used to adjust the frequency to a frequency corresponding to the signal of a certain gear output by the PLC control module. The power module is used to provide direct-current power for the linkage platform control module.

Description

technical field [0001] The invention relates to electrical appliance control technology, in particular to a frequency control system of a frequency converter. Background technique [0002] At present, the following three methods are commonly used for the frequency command setting of the inverter. Method 1: Set the given frequency value by analog, that is, change the voltage or current value added to the inverter by adjusting the resistance value of the potentiometer, so as to realize the Mode 2: keyboard setting, that is, the user can directly change the set frequency of the inverter by changing the potentiometer, number keys or up and down keys on the keyboard of the inverter operator; method 3: contact signal setting, frequency The command is pre-set into multiple gears, the selection of each gear is controlled through the input terminal, and the frequency value is given through the operator. The first method may be affected by the rotation angle of the operating handle, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/05
CPCG05B19/05G05B2219/15078
Inventor 高龙泉刘伯宇
Owner SICHUAN CONSTR MACHINERY GRP