Differential magnetic anisotropy - prerequisite for rotor position detection of PM-synchronous machines with signal injection methods
Differential magnetic anisotropy - prerequisite for rotor position detection of PM-synchronous machines with signal injection methods
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微分磁各向异性 - 采用信号注入方法检测永磁同步电机转子位置的先决条件
DOI：
10.1109/sled.2010.5542803
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
I. Hahn
中科院分区：
文献类型：
--
作者：
I. Hahn
众所周知，只有信号注入法才能在极低转速和静止状态下检测转子位置，这是因为在消失速度时，使用感应电压的不同方法(反电势法)是不合适的。作为先决条件，所有信号注入方法都需要机器在广泛的操作条件下存在磁各向异性。本文首先介绍了电机的基本理论，以推导出所需的电机特性，这些特性是使用信号注入法检测静止状态下转子位置的先决条件。根据差分磁各向异性，通过有限元场计算，分析了不同的集中绕组电机设计。还将给出原型测量的结果，并与理论结果进行比较。
It is well known that rotor position detection at very low speed and at standstill is only possible with signal injection methods, because at vanishing speed the different methods using the induced voltage (back EMF methods) are not suitable. All signal injection methods need as a prerequisite the existence of a magnetic anisotropy of the machine over a wide range of operating conditions. This document presents first the basic theory of electrical machines to derive the needed machine properties which are the prerequisite for rotor position detection at standstill with signal injection methods. Different machine designs with concentrated windings will be analyzed in view of the differential magnetic anisotropy by means of finite element field calculations. Results from prototype measurements will also be presented and compared with the theoretical findings.