SPMSM和IPMSM的区别总结

hotsauce1861 · 发表于2019-11-30 07:59

SPMSM和IPMSM的区别总结 [复制链接]

<div class='showpostmsg'><i class="pstatus"> 本帖最后由 hotsauce1861 于 2019-11-30 08:01 编辑 </i>

## 永磁同步电机分类
根据转子上永磁体的位置不同，可以分为；
- 表贴式永磁同步电机, `SPMSM`
- 内置式永磁同步电机, `IPMSM`

不过有时候又会看到凸极特性和隐极特性，这里主要是由于电机构造不同导致的`Lq`与`Ld`的差别，因此，表贴式和内置式两种电机在控制上又有所不同，下面来看一下；

| 电机| 特性| 电感分量|
| ------------ | ------------ | ------------ |
|SPMSM | 隐极| `Lq` = `Ld`|
|IPMSM | 凸极| `Lq` > `Ld`|

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至于为何会造成`Lq`和`Ld`上的差别，这里我理解还是不太透彻，原因是内置式电机的转子将一部分铁芯的位置占据了，所以，导致d轴的电感分量相对q轴的电感分量要小，下面看在看一张图；

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上面的解释不够透彻,在看下面一段解释；
>Because the number of stator coil turns for the
IPMSM (48 turns) was 25% less than that for the
SPMSM (64 turns), the IPMSM must have a
lower inductance than the SPMSM proportional
to the square of the difference in the number of
turns if all other conditions are the same.
However the size of the actual air gap is
significant because the PM of the designed
SPMSM was thick. Also, the V-type placement
of the PMs in the IPMSM increases the core area
between the air gap and PM and increases the qaxis inductance. Hence, the inductance of the
IPMSM, especially the q-axis inductance, was
more significant than that of the SPMSM despite
the former having fewer coil turns than the latter.

下面的论文可能讲的比较透彻，参考原文，我错误之处望指出

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<a href="javascript:;" class="loginf">EVS28_IPMSM_VS_SPMSM.pdf</a>

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