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第 42 卷 第 1 期                                                                       Vol. 42, No. 1
             2023 年 1 月                          Journal of Applied Acoustics                   January, 2023

             ⋄ 研究报告 ⋄



               包含外壳磁阻的微型平衡电枢换能器仿真模型的


                                            阻抗和振动分析                        ∗



                                                   廖灿杰 韦峻峰            †


                                             (广西民族大学电子信息学院         南宁  530000)
                摘要：现有的 “E” 型平衡电枢等效磁路模型仿真研究通常不考虑金属外壳磁阻带来的影响。为了解决平衡电
                枢换能器中因金属外壳和平衡电枢紧密接触带来的非线性磁阻问题，在现有的平衡电枢换能器等效磁路模型
                上加入了外壳磁阻影响。分析等效磁路模型磁通部分和力学部分的状态空间方程在不同参数条件下的仿真结
                果，总结不同参数对该模型阻抗和振膜位移的影响情况。通过仿真对比，外壳磁阻对平衡电枢换能器位移频率
                响应曲线的影响为 1∼3 dB。对于组装后包含金属外壳的平衡电枢耳机、助听器产品降低频率响应曲线偏差具
                有一定的指导意义。
                关键词：平衡电枢换能器；金属外壳磁阻；非线性磁路分析；状态空间法
                中图法分类号: TN64           文献标识码: A          文章编号: 1000-310X(2023)01-0042-09
                DOI: 10.11684/j.issn.1000-310X.2023.01.006



                 Impedance and vibration analysis of the simulation model of the miniature
                 balanced armature transducer including the magnetoresistance of the shell


                                                LIAO Canjie   WEI Junfen

                         (College of Electronic Information, Guangxi University for Nationalities, Nanning 530000, China)

                 Abstract: In the existing “E”-type balanced armature equivalent magnetic circuit model simulation research,
                 the influence of the magnetic resistance of the metal shell is usually not considered. In order to solve the
                 non-linear magnetic resistance problem caused by the close contact between the metal shell and the balanced
                 armature in the balanced armature transducer, based on the existing equivalent magnetic circuit model of the
                 balanced armature transducer, this study introduced the consideration of the shell magnetic resistance. It
                 analyzed the simulation results of the magnetic flux part and the state space equation of the mechanical part
                 of the equivalent magnetic circuit model under different parameter conditions, and summarized the influence
                 of different parameters on the impedance and diaphragm displacement of the model. Through simulation and
                 comparison, it indicated that the influence of the shell reluctance on the displacement frequency response curve
                 of the balanced armature transducer is 1–3 dB. This study is considered of certain guiding significance for the
                 frequency response curve deviation of the balanced armature earphones and hearing aid products including the
                 metal shell design after assembly.
                 Keywords: Balance-armature transducer; Metal case reluctance; Nonlinearities magnetic circuit; State space
                 method


             2021-10-21 收稿; 2022-02-15 定稿
             国家自然科学基金项目 (62062011)
             ∗
             作者简介: 廖灿杰 (1996– ), 男, 广东茂名人, 硕士研究生, 研究方向: 信号与信息处理。
             † 通信作者 E-mail: weijunfeng@gxun.edu.cn
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