论文以材料费用为目标函数，铁心长度及绕组匝数为变量编制了计算程序，对单相电机进行了优化设计并给出了计算结。
It selects material cost as target function, core length and winding turns as variables to develop program for optimization design of single phase motors.
以具体样机为例，分析了定子绕组匝数、永磁体充磁方向长度和转子外形对转矩特性的影响。分析结果表明：永磁体宽度接近于整数倍定子齿距可降低负载脉动转矩；
Take the sample motor for example, it is analyzed that the influence of the stator winding turns, permanent magnet width and the rotor shape on the torque performance.
根据等效整距集中绕组与实际绕组产生相等基波磁动势的原则，给出了实际定子绕组与转子绕组的总有效匝数表达式。
Based on the principle that an equivalent full-pitch, concentrated winding gives the same fundamental MMF as the actual one, the effective number of turns of the equivalent winding is obtained.
由于直驱式风力发电机转速较低，定子绕组需要有较多的匝数以输出足够高的电压，因而绕组负载电流的去磁反应较大；
More turns of winding is needed to produce enough voltage because the DPMG rotates at low speed, but the armature reaction is high at same time.
该方法还包括：将屏蔽绕组的匝数增大至大于所计算出的匝数；
The method further includes: increasing the number of turns for the shield winding;
该方法还包括：将屏蔽绕组的匝数增大至大于所计算出的匝数；
The method further includes: increasing the number of turns for the shield winding;
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