整距绕组分块转子开关磁阻电机的电磁设计

Electromagnetic Design of a Switched Reluctance Motor With Segmental Rotors and Full-pitch Windings

整距绕组分块转子开关磁阻电机具有高速运行时低风(油)阻和低铁心损耗等优点,特别适合用于航天航空驱动系统。根据整距绕组分块转子开关磁阻电机的基本工作原理,结合输出功率与平均转矩的关系,将绕组电流等效为方波,推导出了整距绕组分块转子开关磁阻电机的主体尺寸计算公式;基于电机定转子未对齐位置和对齐位置的电磁特性,以及整距绕组分块转子开关磁阻电机的电磁特点,确定了定、转子极弧系数选取的规则;同时分析了绕组匝数等主要尺寸的选取的规则;最后,基于上述方法优化设计了一台实验样机,并通过有限元仿真及实验验证了整距绕组分块转子开关磁阻电机的电磁设计方法的正确性。

Switched reluctance motors with full-pitch windings and segmental rotors are particularly suitable for the drive systems in aerospace environments because of low wind （oil） resistance and iron losses at high speed. According to the working principles and electromagnetic performances of switched reluctance motors with fuU-pitch windings and segmental rotors, and combining with the relationship between average torque and electromagnetic power, the computational formula of main body for switched reluctance motors with full-pitch windings and segmental rotors could be obtained when the currents in phase windings were equivalent to square waveforms. The rule of＇ selecting pole arcs of stator and rotor teeth for switched reluctance motors with full-pitch windings and segmental rotors was analyzed based on the electromagnetic performances of the motor, especially in aligned position and unaligned position. The principles of calculating the number of tunas of windings and other key dimensions of themotor were also established. A prototype is designed with the method presented; the finite element analysis and the experiments were accomplished. The results verify this design method for the switched reluctance motors with full-pitch windings and segmental rotors.