Variable-frequency speed regulation control system with load observer and frequency converter

A frequency conversion speed regulation and control system technology, applied in control systems, vector control systems, control of electromechanical brakes, etc., can solve problems such as motor speed fluctuations, the inability of frequency converters to respond quickly, and affecting equipment performance.

Pending Publication Date: 2020-08-25
NANCAL ENERGY SAVING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing frequency converter usually has the function of speed regulation, but when the load changes, the current frequency converter cannot respond quickly, resulting in large fluctuations in the motor speed and affecting the operating performance of the equipment

Method used

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  • Variable-frequency speed regulation control system with load observer and frequency converter
  • Variable-frequency speed regulation control system with load observer and frequency converter
  • Variable-frequency speed regulation control system with load observer and frequency converter

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0033] figure 1 It is a structural schematic diagram of a frequency conversion speed regulation control system in the prior art. refer to figure 1 , the frequency conversion speed regulation control system is composed of a double closed-loop system of speed and current, wherein the double closed-loop system of speed and current includes a speed adjustment module 10, an excitation current adjustment module 20, a first vector conversion module 30 and a second vector conversion module 40, the speed The adjustment m...

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Abstract

The embodiment of the invention discloses a variable-frequency speed regulation control system with a load observer and a frequency converter. The variable-frequency speed regulation control system iscomposed of a rotating speed and current double-closed-loop system, the variable-frequency speed regulation control system further comprises the load observer, and the load observer comprises an adjuster and an integrator; the input end of the regulator inputs the difference between an actual rotating speed value and a rotating speed observation value, and the first output end of the regulator iselectrically connected with the output end of the rotating speed regulation module and outputs a first load torque observation value; the integrator is used for calculating a rotating speed observation value according to a second load torque observation value and the output torque of the system and outputting the rotating speed observation value to the input end of the regulator from the output end. According to the technical scheme provided by the embodiment of the invention, the change condition of the load is detected in real time through the load observer, when the load changes, the loadstate can be quickly responded, the rotating speed of the motor can be accurately adjusted, the dynamic reduction of the rotating speed of the motor can be reduced to the greatest extent in combination with vector control, and the stability of the system is favorably maintained.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of frequency conversion speed regulation, and in particular to a frequency conversion speed regulation control system with a load observer and a frequency converter. Background technique [0002] The frequency converter is a power control device that uses frequency conversion technology and microelectronics technology to control the AC motor by changing the frequency of the motor's working power supply. With the continuous improvement of industrial automation, frequency converters have also been widely used. [0003] The existing frequency converter usually has the function of speed regulation, but when the load changes, the current frequency converter cannot respond quickly, resulting in large fluctuations in the motor speed and affecting the operating performance of the equipment. Contents of the invention [0004] Embodiments of the present invention provide a variable frequen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P27/04H02P27/14H02P21/00
CPCH02P27/045H02P27/14H02P21/0003
Inventor 祖军赵岚于胜涛
Owner NANCAL ENERGY SAVING TECH
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