试制了1台8 kW电动汽车驱动非晶开关磁阻电机(SRM),并对其进行了静态性能测试。使用有限元方法对电机在低速大扭矩及高速小扭矩共计4种工况下的铁耗、铜耗、扭矩和效率等性能进行了仿真计算。结果表明,相对于硅钢,非晶合金的高磁导率特性可有效保持SRM在高频激励条件下的相电感值；非晶合金的低损耗特性可有效降低电机铁耗值,尤其在铁耗为电机主要损耗的高速小扭矩工况下,可显著提升电机效率(3%~9%)。然而,非晶合金的饱和磁密较低,非晶电机的磁链-电流曲线相对于硅钢电机会有区别,应在其工作磁密、结构尺寸及控制参数上进行调整和优化以获得最佳性能。

An 8 kW switched reluctance motor (SRM) with amorphous cores was manufactured for electricity vehicle (EV) traction. The core magnetic performance and motor static parameters were tested and compared with the same type motor with 50W350 cores. Then, according to the character of EV traction, the motor′s dynamic performance was simulated by finite element analysis (FEA) method. The test and calculation results showed that the amorphous cores had higher magnetic permeability compared with 50W350, which made the motor keep stable phase inductance in the high frequency excitation condition. In addition, amorphous cores significantly reduced motor core loss, and obvioushy increased motor efficiency (about 3%~9%) at high speed with small torque conditions. However, amorphous cores had lower saturated magnetic density, and the amorphous motor flux linkagecurrent curve was different from that of the motor with 50W350 cores, so the operating flux density, geometry and control parameters should be optimized to get the best performance.

TM 352