【作者】 张喜海； 张长利； 房俊龙； 于啸；

【Author】 Zhang Xihai, Zhang Changli, Fang Junlong, Yu Xiao (Engineering college, Northeast Agricultural University, Harbin, Heilongjiang 150030, China)

【机构】 东北农业大学工程学院；

【摘要】 为了进一步提高脉冲电场食品处理的杀菌率,延长食品货架期,本文从脉冲发生器的波形和脉冲能量方面考虑,设计了一种合理有效的单极性方波脉冲形成网络。通过计算液体食品负载的等效电路,根据能量关系确定放电电容值,得到方波脉冲网络的各参数。然后,利用MATLAB中电力系统工具箱(Power System Block)模块对方波脉冲发生电路进行仿真,得到峰值为35kV,波顶较平,上升、下降沿很陡的近似方波脉冲。仿真结果表明方波脉冲发生网络理论上的可行性,为食品处理用脉冲发生器的进一步改进提供理论依据。更多还原

【Abstract】 In order to further improve sterilization ratio for the liquid foods using pulsed electric field and prolong shelf life, the pulse-forming network of unipolar square waveform was designed based on the waveform and energy efficient. Through calculating the liquid food equivalent circuit and obtaining the discharge capacitance value according to energy threshold, the pulse-forming network parameters were derived. The modeling and simulation of square waveform pulsed circuit using power system block toolbox were presented. It obtained peak value of 35kV, flat top pulse and rapidly decline square waveform. It shows that the simulation of pulse-forming network is a feasible approach and those results provide theoretical basis for improving pulse-generating circuit.更多还原