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Cooperative controller for two-motor vector control frequency control system and construction method thereof

A technology of coordinated controller and vector control, applied in vector control systems, control systems, motor generator control, etc. Performance Anti-load disturbance running performance, excellent coordinated control, excellent effect of speed and tension

Inactive Publication Date: 2008-11-05
JIANGSU UNIV
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Problems solved by technology

Because the two-motor vector control frequency conversion speed regulation system is a complex nonlinear coupling system, the tension of the system is related to the speed difference between the two induction motors, and the speed and tension are coupled with each other. The commonly used proportional-integral-derivative PID adjustment cannot achieve the speed and The decoupling control of tension cannot achieve high-performance coordinated control

Method used

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  • Cooperative controller for two-motor vector control frequency control system and construction method thereof
  • Cooperative controller for two-motor vector control frequency control system and construction method thereof
  • Cooperative controller for two-motor vector control frequency control system and construction method thereof

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Embodiment Construction

[0020] The solution of the present invention is to take two frequency converters 1, two induction motors 2 and a common load 3 working in a vector control mode as a whole to form a two-motor vector control frequency conversion speed regulation system 4 . According to the analysis, it can be seen that the mathematical model of the two-motor vector control frequency conversion speed regulation system 4 is a third-order differential equation under the static two-phase coordinate system, the two outputs are speed and tension respectively, the relative order of speed is first order, and the relative order of tension is the first order. The relative order is the second order, and the overall system, that is, the inverse system corresponding to the two-motor vector control frequency conversion speed regulation system 4 exists. A static artificial neural network with 5 input nodes and 2 output nodes (such as multi-layer network MLN or meridional basis function network RBF, etc.) is use...

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Abstract

The invention discloses a tuning controller of a two-motor vector control frequency control system and a manufacture method thereof, including a neural net general inverse and a linear closed-loop controller, wherein a frequency converter, two induction machines and a common load are integrated to compose a two-motor vector control frequency control system; the neural net general inverse is connected at the front of the two-motor vector control frequency control system, to compound a pseudolinear system consisting of two coupled speed sub-systems and a strain sub-system; a speed controller and a strain controller constitute the closed-loop controller; the neural net general inverse and the linear closed-loop controller are connected in series to compose the neural net general inverse turning controller, to obtain excellent coordination control of the rotation speed and the strain, which not only designs the novel multi-motor vector control frequency control system, but realizes the net control with wide application foreground, convenient construction system and low cost in the old multi-AC motor system.

Description

technical field [0001] The present invention is a coordination controller of a two-motor vector control frequency conversion speed regulation system and its construction method, which is suitable for high-performance coordination control of two vector control frequency converters driving two induction motors to drive a common load (such as a banded load) , belongs to the technical field of electric drive control equipment. Background technique [0002] In industrial production, there are a large number of two motors or even multiple motors driving the same load (such as strip loads, etc.), which require coordinated operation at the same speed. Currently, most such systems use DC motors. Due to the complex structure of the DC motor, it is difficult to maintain, and there is a commutation problem, which brings inconvenience to use. Due to the general vector control inverter working in the mode of constant voltage frequency ratio is small in size, light in weight, has good sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P5/46H02P21/00G06N3/02
Inventor 刘国海孙玉坤戴先中沈跃陈兆岭周华伟
Owner JIANGSU UNIV
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