Impact of Core Sheet Cutting Method on Parameters of Induction Motors

Maria Dems, Krzysztof Komeza, Witold Kubiak and Jacek Szulakowski
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Maria Dems: Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-924 Lodz, Poland
Krzysztof Komeza: Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-924 Lodz, Poland
Witold Kubiak: Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-924 Lodz, Poland
Jacek Szulakowski: Institute of Mechatronics and Information Systems, Lodz University of Technology, 90-924 Lodz, Poland

Energies, 2020, vol. 13, issue 8, 1-19

Abstract: The method of cutting motor core sheets causes a change in their magnetic properties and core losses, especially additional losses. Reducing motor losses is very important because of the fulfillment of increasingly stringent requirements set by international regulations for reducing electricity consumption. Due to fact that more and more often induction motors are supplied with high-frequency voltage, core losses are beginning to play a dominant role in the motor’s loss balance. That is why accurate determination of these losses is very important and cutting has a significant impact on them. This report shows how the method of cutting sheet metal affects losses in the finished induction motor working in a wide frequency range. The paper presents the impact of various motor core fabrication technologies on its operational parameters and an approximate way of including this impact in analytical calculations at the design stage of new machine designs, as it is necessary to use sheet metal cutting technologies such as laser or electrical discharge machining (EDM) at the prototype stage. The proposed method is based on measurements of sheet parameters made on toroidal samples with appropriately selected dimensions, so that the width of the sample corresponds to the average width of the motor core elements.

Keywords: induction motors; cutting method; motor efficiency (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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