双电源转换开关电磁驱动机构的研究

发布时间：2018-12-30 15:27

【摘要】：双电源转换开关电器作为消防、地铁等重要负荷的末端互投装置，在工程中得到了广泛的应用，在供电系统中的作用也日趋显著。近年来，双电源转换开关电器行业在我国发展较为迅速。由于双电源转换开关的技术水平、可靠性和先进性直接影响着使用场所的供电水平，关系到用电人员的生命安全，所以对其可靠性和机械性的要求要高于其他开关设备。安全可靠性是双电源转换开关设计、制造和选用过程中最关键的指标，而具有大电流承载力的三稳态PC级双电源转换开关是未来发展的趋势。为了提高现有PC级双电源转换开关的操作可靠性，本文对三稳态的PC级双电源转换开关进行了结构设计，使其能够更好地克服负载反力，，从而达到高效可靠的吸合目的。根据所设计的目标电磁驱动机构的磁场分布特点，分别给出静态磁场和瞬态磁场分析的计算模型和计算方程。利用Ansoft有限元分析软件对设计结构进行仿真分析。通过静磁场分析得到电磁回路的磁场分布，动铁心在不同位置与磁场力的关系等，由此通过对比、设计电磁系统的结构尺寸。基于本体结构与外电路、线圈匝数等参数设置，建立了设计结构的动态特性仿真模型。根据不同条件，对设计结构进行合闸过程的仿真分析，得到相应的瞬态特性曲线，并确定三稳态弹簧的反力特性。同时，对机械传动部分进行反力归算，确定电磁铁合闸时所受到的机械反力。通过特性参数与设计要求进行对比分析，验证设计机构的可行性。
[Abstract]:As the terminal switching device of fire fighting, subway and other important load, dual-power switch has been widely used in engineering, and the function in power supply system is becoming more and more obvious. In recent years, the double-power switch electrical industry has developed rapidly in our country. Due to the technical level, reliability and advanced nature of the dual-power switch directly affect the power supply level in the place of use, and related to the safety of the life of the power users, so the reliability and mechanical requirements of the switch are higher than other switchgear. Safety and reliability are the most important indexes in the design, manufacture and selection of dual-power switch, and the three-stable PC switch with high current bearing capacity is the trend in the future. In order to improve the operational reliability of the existing PC double power conversion switch, this paper designs the structure of the three stable PC double power conversion switch, so that it can overcome the load reaction better and achieve the purpose of high efficiency and reliability. According to the magnetic field distribution characteristics of the designed electromagnetic driving mechanism, the calculation models and equations of the static magnetic field and the transient magnetic field analysis are given respectively. Ansoft finite element analysis software is used to simulate and analyze the design structure. Through static magnetic field analysis, the magnetic field distribution of the electromagnetic loop, the relationship between the moving iron core and the magnetic field force in different positions and so on are obtained, and the structural dimensions of the electromagnetic system are designed by comparison. The dynamic characteristic simulation model of the design structure is established based on the parameters such as the structure of the body and the external circuit and the number of turns of the coil. According to different conditions, the simulation analysis of the closing process of the designed structure is carried out, and the corresponding transient characteristic curve is obtained, and the reaction characteristics of the three-stable spring are determined. At the same time, the reaction force of the mechanical transmission part is calculated to determine the mechanical reaction force when the electromagnet is closed. The feasibility of the design mechanism is verified by comparing the characteristic parameters with the design requirements.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM564

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