常闭式电磁制动器驱动结构设计及性能分析

针对常闭式电磁制动器耗能高、制动力密度小、励磁线圈发热严重等缺点，尝试将永磁体引入至制动器驱动结构中，设计出了一种电磁与永磁混合作用的新型电永磁驱动结构。结合有限元软件，采用有限元法分析了其内部磁通量分布并研究励磁线圈电流、气隙及永磁体结构形状等因素对电磁力的影响。结果表明，电磁与永磁两磁场耦合性较好，电磁吸力随电流增加及气隙的减小增幅较大，且同等条件下L形永磁体的电磁驱动结构对衔铁的吸力最大，对电磁制动器轻量化研究具有指导意义。

Driver Architecture Design and Performance Analysis of the #br# Normal Closed Electromagnetic Brake

Aiming at high energy-consuming,low braking force density,serious excitation coil heating shortages of the normal closed electromagnetic brake,attempting to introduce permanent magnet into the electromagnetic driving unit,a new electromagnetic drive mechanism with hybrid electromagnets made of permanent and electromagnet is designed.Combined with the finite element analyze software,the finite element method was applied to analyze magnetic flux density distribution and analyze influence factors on electromagnetic force,the factors includes the cross section shape of permanent shape,excitation coil current,air gap.It was found that high coupling performance of electromagnetic field and permanent magnetic field,the rapid electromagnetic force grow with current increasing and decreasing of gas gap distance,under the same condition,Electromagnetic Driving Structure with L-shaped Permanent Magnet produce a high suction,It has guiding significance for lightweight research of electromagnetic brake.