智能微型断路器抗强磁干扰技术

Anti-strong Magnetic Interference Technology of Intelligent Miniature Circuit Breaker

针对智能微型断路器在强磁干扰情况下容易出现误动和拒动的问题,对可能造成磁干扰的智能微型断路器操控系统、直流电机、开关电源等相关模块进行了分析,并提出了具体的优化设计方案。提出了基于微动开关与霍尔开关双模检测相结合的操控系统抗磁干扰优化设计方法,并从硬件和软件2方面加以实现。提出了直流电机抗磁干扰优化设计方法和开关电源输出功率抗磁干扰优化设计方法,提高了直流电机和开关电源抗磁干扰的能力。实验表明,经优化后的智能微型断路器抗磁干扰性能优越,稳定性、可靠性高,解决了智能微型断路器在强磁干扰情况下容易出现误动和拒动的难题,具有推广应用价值。

Aiming at the problem that the intelligent micro-circuit breaker is prone to misoperation and miss trip under strong magnetic interference,the intelligent micro-circuit breaker control system,DC motor,switching power supply and other related modules that may cause magnetic interference are analyzed,and the concrete optimization design scheme is put forward.An optimum design method for anti-magnetic interference of control system based on dual-mode detection of micro-switch and Hall switch is proposed,which is realized in both hardware and software.The optimum design methods for anti-magnetic interference of DC motor and switching power supply output power are also proposed,which improve the anti-magnetic interference ability of DC motor and switching power supply.The experimental results show that the optimized intelligent micro-circuit breaker has excellent anti-magnetic interference performance,high stability and reliability.It thoroughly solves the problem that the intelligent microcircuit breaker is prone to maloperation and rejection under strong magnetic interference,and has a strong application value.