Abstract
This paper studies the magnetization process in electrical steel sheets for rotational magnetizations as they occur in the magnetic circuit of electrical machines. A four-pole rotational single sheet tester is used to generate the rotating magnetic flux inside the sample. A field-oriented control scheme is implemented to improve the control performance. The magnetization process of different non-oriented materials is analyzed and compared.
Highlights
The increasing requirements for modern high performance electrical machines call for suitable loss and magnetization models for the highly utilized soft magnetic materials
Concepts for two-dimensional measurement devices, referred to as rotational single sheet testers (RSST), are known,[3,4] their usage is not very common compared to unidirectional methods.[5]
MEASUREMENT RESULTS AND DISCUSSION The RSST is used to analyze the material behavior for various grades of electrical steel
Summary
The increasing requirements for modern high performance electrical machines call for suitable loss and magnetization models for the highly utilized soft magnetic materials. Current approaches to this problem aim for a vectorial description of the magnetizing process, which is capable to accurately predict the hysteretic nature of these materials.[1,2] concepts for two-dimensional measurement devices, referred to as rotational single sheet testers (RSST), are known,[3,4] their usage is not very common compared to unidirectional methods.[5] Reasons for this might be the more complicated control of rotational magnetizations. The paper concludes with a summary of the main results
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