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Torque compensation system and method for compressor

A torque compensation and compressor technology, applied in control systems, vector control systems, mechanical equipment, etc., can solve problems such as difficult to meet requirements, and achieve the effect of good load changes

Active Publication Date: 2021-06-11
HANGZHOU ZHOUJU ELECTRONICS TECHNOLOGICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under different working conditions of the compressor, the nonlinear change of the load will make it difficult for the preset load curve to meet the requirements of all working conditions.

Method used

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  • Torque compensation system and method for compressor
  • Torque compensation system and method for compressor
  • Torque compensation system and method for compressor

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Embodiment approach

[0047] 2. Use figure 2 The observation angle obtained by the positionless observer constructs the mechanical angle. As an embodiment of the present invention, the mathematical relationship of the observation angle to construct the mechanical angle is as follows:

[0048]

[0049] In the formula: P is the pole logarithm, In order to observe the electrical angle, θ(k) is the mechanical angle at time k, where the positionless observer consists of a back EMF observer and a phase-locked loop.

[0050] 3. Use the effective fluctuating load obtained in step 1 The mechanical angle obtained in step 2 is used to construct nonlinear negative feedback, and the compensation torque to be compensated is solved iteratively

[0051] As an embodiment of the present invention, the compensation torque The calculation formula is as follows:

[0052]

[0053]

[0054]

[0055] for compensation torque The phase of at time k, for compensation torque The phase at time k-1...

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Abstract

The invention relates to a torque compensation method for a compressor. The torque compensation method comprises the following steps: S1, obtaining an effective fluctuating load during operation of the compressor; S2, reconstructing a mechanical angle by using an electrical angle observed by a position-free algorithm; S3, constructing non-linear negative feedback through the effective fluctuation load and the mechanical angle, and solving compensation torque through iteration; and S4, converting the compensation torque into a current command, and outputting the current command. According to the scheme, harmonic torque compensation of the compressor can be achieved, and rotating speed fluctuation and system vibration are reduced.

Description

technical field [0001] The invention belongs to the technical field of compressor control, and in particular relates to a torque compensation system and method for a compressor. Background technique [0002] For the compressor, due to its own mechanical structure, there is a large pressure difference between the suction side and the discharge side of the compressor, resulting in large load fluctuations in each mechanical cycle of the compressor. If no special compensation method is adopted, it will cause fluctuations in the speed of the compressor and severe shocks in the system. These vibrations not only produce loud noises, but also affect the instability of the mechanical structure. [0003] For example, the patent publication number CN106762653A discloses a compressor torque compensation method, device, compressor and its control method, wherein the torque compensation method includes the following steps: obtaining the target speed and feedback speed of the compressor, ...

Claims

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Application Information

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IPC IPC(8): H02P21/05H02P21/20F04B35/04
CPCH02P21/05H02P21/20F04B35/04
Inventor 张晨晨杨阳徐世文
Owner HANGZHOU ZHOUJU ELECTRONICS TECHNOLOGICAL
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