双余度永磁无刷直流电机磁-热耦合分析

Magnetic-Thermal Coupling Analysis of Dual-Redundancy BLDCM

文章针对永磁无刷直流电机中常见的绕组故障,将余度技术引入到无刷电机设计中来,设计了双余度永磁无刷直流电机,它采用2种定子绕组方式,包括同槽嵌放和隔槽嵌放2种结构。根据永磁无刷直流电机的电压平衡方程式,推导了2种结构下的双余度永磁无刷直流电机电压、转矩方程。建立了2种双余度无刷直流电机的电磁场模型,设置了2套独立的控制电路,并利用magnet对其进行了电磁场仿真,对比分析了2种结构下的转速、转矩等。文章建立了2种双余度无刷直流电机的磁热耦合分析模型,对其热场进行了仿真,对比分析了2种结构下的温度。仿真结果表明:2种结构的双余度无刷直流电机在运行过程中,具有良好的动态特性,2套绕组并未给电机带来不良后果,但大大提高了系统可靠性。

Sections 1,2 and 3 of the full paper explain our theoretical and simulation research on dual-redundancy BLDCM（brushless DC motor）.Their core consists of：（1） section 1 briefs the relevant information about mathematical modeling;（2） according to the winding fault of permanent magnet BLDCM,redundancy technique is brought into the motor design and then two structures of dual-redundancy BLDCM are designed;（3） eqs.（4） and（6） can be used for calculating voltage and torque respectively;（4） the magnetic-thermal coupling analysis model is established;（5） we give simulation results in Figs.3 through 11 and then analyze them.The above-mentioned simulation results and their analysis show preliminarily that：（1） the two structures of the dual-redundancy BLDCM can achieve good dynamic characteristics;（2） the two types of motor windings improve system reliability without bringing bad results.