环形绕组无刷直流电机的换向过程分析及建模  

Analytical Modeling of the Circular Winding Brushless DC Motor under Load Commutation

作　　者：林黄达[1] 程思为 王东[1] 贾喆武 张庆湖 Lin Huangda;Cheng Siwei;Wang Dong;Jia Zhewu;Zhang Qinghu(National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering,Wuhan 430033 China)

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室,武汉430033

出　　处：《电工技术学报》2020年第8期1603-1612,共10页Transactions of China Electrotechnical Society

基　　金：国家重点基础研究发展计划项目(973计划)(2013CB035601);国家自然科学基金项目(51507181)资助。

摘　　要：环形绕组无刷直流电机(CWBLDC)是一种多相且定子绕组环形连接的电机,由于反电动势的方波度更高,其转矩密度较传统三相无刷直流电机更大,通过极、槽数合理设计的分数槽绕组能够有效地抑制电机的转矩脉动。并且,CWBLDC所需的功率元器件数目较多的特点在多相大容量舰船电力推进系统的应用中不是缺点。针对相数较多、运行过程系统网络拓扑不断变化的难点,该文以并联支路电流为模型变量,利用拓扑的周期变换特性建立CWBLDC的数学模型,通过场路耦合仿真与原理样机实验验证了建模思路与模型分析结果的正确性。所建立的数学模型有助于深入理解包括换向过程的电机运行原理,快速得到电机的稳态性能,便于确定电机设计参数较不同参数选取对电机性能的影响。The circular winding brushless DC motor(CWBLDC)is a brushless DC motor,but a multiphase winding of the motor is connected in a unique polygon or circular fashion.The CWBLDC motor has higher torque density due to larger width of electromotive force(EMF)trapezoidal wave.Combined with well-designed fractional-slot winding,the motor can dramatically reduce the commutation torque ripple,which is suitable for electric propulsion systems of high power rating ships despite more power semiconductor devices required.Different from the conventional three-phase BLDC motor,the circuit topologies transform with the rotor rotation.Transformation period of topologies reduces the modeling complexity.Field-circuit couple simulations and experimental results verify the model.The model is helpful to understand the operation principle of CWBLDC motor.It can quickly analyze the steady-state performance,which is suitable for parameters determination in CWBLDC motor design.

关 键 词：无刷直流电机 多相环形绕组 分数槽绕组 负载换向 解析模型 拓扑周期变换 

分 类 号：TM351[电气工程—电机]