永磁机构操作线圈等效电路的建模

从电路角度分析了永磁操动机构的线圈电流波形与动铁心行程间的关系,采用分段线性化的思想,建立了操作线圈的两种等效电路模型。根据实际机构仿真设计中给出的操作线圈电流波形计算出模型中各段电路参数,并对线圈中的电流波形进行了拟合。将其与同一机构的仿真设计波形和操作实验结果进行比较后证明,用这种方法建立电路模型、计算电路参数是正确可行的。所提出的电路模型可用于永磁机构操作控制器中线圈电路的仿真设计,特别是选择电力电子器件及其保护电路参数。

Modeling on the Equivalent Circuit of Operating Coil in Permanent Magnetic Actuator

As viewed from electric circuit,analyzing the relationship between the operat ing coil current waveform of the permanent magnet actuator(PMA)and the travel response of its movable armature,two equivalent circuit models of operating coi l are given by means of segmented linearization.Based on the coil current wavefo rms which have been obtained in the PMA design,the circuit parameters can be ca lculated in each segment,and the coil current waveform can be fitted.As compare d with the design and experiment results of the same mechanism,it is demonstrat ed that the methods for circuit modeling and calculating their parameters are ef fective.The proposed circuit models can be used to simulate and design the PMA c ontrollers,especially to select power electronic devices and parameters of thei r protection circuits.