Electromagnetic Performance of Novel Variable Flux Reluctance Machines With DC-Field Coil in Stator
Electromagnetic Performance of Novel Variable Flux Reluctance Machines With DC-Field Coil in Stator
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DOI：
10.1109/tmag.2012.2235182
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发表时间：
2013-06
影响因子：
2.1
通讯作者：
X. Liu;Z. Zhu
中科院分区：
文献类型：
--
作者：
X. Liu;Z. Zhu
在本文中，研究并比较了带有不同显着结构的新型可变通量不感染机（VFRMS），它们采用双重显着的结构以及每个阶段的定子位于定子中相同的场绕组。不同于其他双重明显的机器，例如开关不情愿机器（SRM）和双重喂养的双重明显机器（DFDSM），这些方程式用于确定定子/转子杆数字，即$ n_ _ {\ rm rm r} = n _ {\ rm rm} s} \ pm 2k $，在VFRMS中不再受到限制。如果定子/转子杆号可以满足$ n _ {\ rm r} \ ne kn _ {\ rm pH} $，则可以使用转子杆数的更可行选择。因此，对于六个站点机器，不仅可以选择转子杆号作为偶数数字，例如4个和8个旋转杆，通常用于SRM和DFDSM 7-转子杆也可行。使用5杆和7旋翼杆的好处是取消偶数谐波，以及在磁通链和后EMF中的三阶谐波。因此，可以获得更多的正弦反向EMF，以产生较低的扭矩波纹。 5和7旋转杆机中的取消是因为磁场和电枢绕组产生的通量可以通过相邻的定子电线杆形成较短的通量路径，这可以进一步增加其平均扭矩。为了验证分析，制造和测试了四个具有不同转子杆数量的原型机。
In this paper, novel variable flux reluctance machines (VFRMs) with different rotor pole numbers, which employ a doubly salient structure together with field windings identically located in the stator for each phase, are investigated and compared. Different from other doubly salient machines, such as switched reluctance machines (SRM) and doubly fed doubly salient machines (DFDSM), the equation for determining the stator/rotor pole numbers, i.e., $N_{\rm r}=N_{\rm s}\pm 2k$ , is no longer limited in VFRMs. More feasible selections of rotor pole numbers can be used if the stator/rotor pole numbers can satisfy $N_{\rm r}\ne kN_{\rm ph}$ . Thus, for a 6-stator pole machine not only the rotor pole number can be selected as even numbers, such as 4- and 8-rotor poles, which are commonly used for SRM and DFDSM, but odd numbers, such as 5- and 7- rotor poles, are also feasible. The benefits of using 5- and 7-rotor poles are the cancellation of even-order harmonics together with the third-order harmonic in the flux-linkage and back-EMF. Hence, more sinusoidal back-EMF can be obtained to produce a lower torque ripple. The cancellation in 5- and 7-rotor pole machines is because the flux generated by field and armature windings can pass through the adjacent stator poles to form a shorter flux path, which can further increase their average torque. To validate the analysis, four prototype machines with different rotor pole numbers are manufactured and tested.