纹波抑制算法在变频空调上的研究应用

doi:10.19784/j.cnki.issn1672-0172.2024.01.006

摘要/Abstract

摘要： 电解电容作为变频控制器中重要器件,其寿命直接决定空调使用年限。电解电容纹波电流又是影响其寿命的关键参数。通过纹波抑制技术,对压缩机电流进行前馈控制,降低电解电容纹波电流,延长电容使用寿命。首先针对控制系统建立其数学模型,根据伯德图进行系统稳定性分析,确定控制参数;建立前馈系统的数学模型,分析前馈控制对系统稳定性影响。其次通过仿真确认控制方案和算法的可行性,保证控制环路的鲁棒性。最后实验结果表明,实验工况内,增加控制策略后电解电容纹波电流减小13.6%,有效延长电解电容的使用寿命;完成可靠性测试,结果表明该控制技术能满足各项极限测试要求,控制策略安全可靠。

关键词: 纹波抑制, 纹波电流, 前馈控制, 寿命

Abstract: As an important device in frequency converter, the life of electrolytic capacitor directly determines the service life of air conditioning. Ripple current of electrolytic capacitor is also the key parameter that affects its life. The feed-forward control of compressor current is carried out by ripple suppression technology, which can reduce ripple current of electrolytic capacitor and prolong the service life of capacitor. Firstly, the mathematical model of the control system is established, and the stability of the system is analyzed according to the Bode diagram to determine the control parameters; The mathematical model of feedforward system is established and the influence of feedforward control on the stability of the system is analyzed. Secondly, the feasibility of the control scheme and algorithm is confirmed by simulation, and the robustness of the control loop is guaranteed. Finally, the experimental results show that the ripple current of electrolytic capacitor decreases by 13.6% after increasing the control strategy, which can effectively prolong the service life of the electrolytic capacitor. The results show that the control technology can meet the requirements of limit test and the control strategy is safe and reliable.

Key words: Ripple suppression technology, Ripple current, The feed-forward control of compressor current, Life

中图分类号:

TM925.12

马争先, 闫纪如. 纹波抑制算法在变频空调上的研究应用[J]. 家电科技, 2024, 0(1): 42-47.

MA Zhengxian, YAN Jiru. Research and application of ripple suppression algorithm in variable frequency air conditioning[J]. Journal of Appliance Science & Technology, 2024, 0(1): 42-47.

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