小型矿用本安型DC-DC隔离电源模块设计

摘要

When the mine intrinsic safe power was energized, due to the loading, the mine intrinsic power would have miss actions and poor reliability occurred by the capacitor charging. Due to the loading, the voltage drop difference of the power supply line would have a poor loading reliability. In order to solve the above problems, a study on the DC-DC power modular of the loading terminal was conducted and a new design plan of the intrinsic safe DC-DC isolated power modular was provided. A special three stage slow star circuit was applied in the design plan and would have a small start impact, a small equivalent capacitance of the input terminal and other features. The application of the small circulated feedback voltage stabilization structure with high stability would ensure the dynamic response speed of the power and could eliminate the self-oscillation caused by the long power line at the input terminal.%矿用本安电源上电时,容易因负载电容充电造成本安电源误动、可靠性变差;因负载供电线路压降差异导致负载可靠性变差.为解决以上问题,对负载端直流-直流(DC-DC)电源模块进行研究,提出一种新的本安型DC-DC隔离电源模块的设计方案.在该方案中采用特有的三级缓启动电路,具有开机冲击小、输入端等效电容小等特点;采用高稳定度的小环反馈式稳压结构既保证了电源的动态响应速度,又能避免输入端长线造成的自激振荡.