To optimize the efficiency of the linear compressor,its operating frequency must be controlled equal to the system resonant frequency.The traditional resonant frequency tracking control algorithm relies on the steady ...To optimize the efficiency of the linear compressor,its operating frequency must be controlled equal to the system resonant frequency.The traditional resonant frequency tracking control algorithm relies on the steady state characteristics of the system,which suffers from slow convergence speed,low accuracy and slow system response.In order to solve these problems,a novel resonant frequency tracking control for linear compressor based on model reference adaptive system(MRAS)is proposed in this paper,and the parameter adaptive rate is derived by the Popov's hyperstability theory,so that the system resonant frequency can be directly calculated through the parameter adaptive rate.Furthermore,the traditional algorithm needs to calculate the piston stroke signal by integrating the back-EMF,which has the problem of integral drift.The algorithm proposed in this paper only needs the velocity signal,and the accuracy of the velocity calculation can be ensured by utilizing the self-adaptive band-pass filter(SABPF),thereby greatly improving the accuracy of the resonance frequency calculation.Simulation results verify the effectiveness of the proposed algorithm.展开更多
从高速长定子双边直线感应电动机(double-sided line induction motor,DSLIM)的基本原理出发,利用直线电动机的发射曲线和数学模型,采用动子磁场定向的控制原理,在Simulink环境下,建立了电机的数字仿真模型。用该模型分析电机的动态性能...从高速长定子双边直线感应电动机(double-sided line induction motor,DSLIM)的基本原理出发,利用直线电动机的发射曲线和数学模型,采用动子磁场定向的控制原理,在Simulink环境下,建立了电机的数字仿真模型。用该模型分析电机的动态性能,得到了该类型电机的发射曲线以及电机电压、电流、压频比、功率因数、功率效率、能量效率等参数的变化规律,为脉冲供电系统和驱动系统的设计提供了重要的参考依据;利用该类型电机可以实现对大质量物体的发射。仿真结果与基于ANSOFT二维瞬态场计算的结果吻合较好,验证了该模型的正确性。仿真模型具有运算速度快、简单易行等优点。展开更多
基金supported in part by the National Natural Science Foundation of China under Grants 51877093 and 51707079in part by the National Key Research and Development Program of China under Grant 2018YFE0100200in part by the Key Technical Innovation Program of Hubei Province under Grant 2019AAA026.
文摘To optimize the efficiency of the linear compressor,its operating frequency must be controlled equal to the system resonant frequency.The traditional resonant frequency tracking control algorithm relies on the steady state characteristics of the system,which suffers from slow convergence speed,low accuracy and slow system response.In order to solve these problems,a novel resonant frequency tracking control for linear compressor based on model reference adaptive system(MRAS)is proposed in this paper,and the parameter adaptive rate is derived by the Popov's hyperstability theory,so that the system resonant frequency can be directly calculated through the parameter adaptive rate.Furthermore,the traditional algorithm needs to calculate the piston stroke signal by integrating the back-EMF,which has the problem of integral drift.The algorithm proposed in this paper only needs the velocity signal,and the accuracy of the velocity calculation can be ensured by utilizing the self-adaptive band-pass filter(SABPF),thereby greatly improving the accuracy of the resonance frequency calculation.Simulation results verify the effectiveness of the proposed algorithm.
文摘从高速长定子双边直线感应电动机(double-sided line induction motor,DSLIM)的基本原理出发,利用直线电动机的发射曲线和数学模型,采用动子磁场定向的控制原理,在Simulink环境下,建立了电机的数字仿真模型。用该模型分析电机的动态性能,得到了该类型电机的发射曲线以及电机电压、电流、压频比、功率因数、功率效率、能量效率等参数的变化规律,为脉冲供电系统和驱动系统的设计提供了重要的参考依据;利用该类型电机可以实现对大质量物体的发射。仿真结果与基于ANSOFT二维瞬态场计算的结果吻合较好,验证了该模型的正确性。仿真模型具有运算速度快、简单易行等优点。
