Influencing Factors for the Ultrasonic Compacting Process of Insulated Litz Wires for Electric Drives

Seefried J, Riedel A, Lohbauer A, Baessler H, Kühl A, Franke J (2021)

Publication Type: Conference contribution

Publication year: 2021

Publisher: Electrosuisse, Verband fur Elektro-, Energie und Informationstechnik

Pages Range: 599-606

Conference Proceedings Title: 30th International Conference on Electrical Contacts, ICEC 2020 - Proceedings

Event location: Online

ISBN: 9783907255117

Abstract

The increasing demand for new electric drive concepts in the automotive sector leads to innovations in the development and production of these drives. Due to the demand for steadily higher drive speeds, litz wires, also called stranded wires, offer various advantages in terms of loss reduction. These losses include current displacement due to the skin- and proximity effect in the wire at higher frequencies. However, these litz wires complicate the process step of contacting the winding ends. For example, during this contacting process it is necessary to connect a high number of individual wires electrically conductively and mechanically with each other. However, these individual wires must be stripped simultaneously during the process. One possibility to implement this process step is the ultrasonic compaction process. By applying and damping ultrasonic oscillations, the individual wires can be thermally stripped and also welded together. However, a wide range of influencing parameters must be validated for this process. These include relevant process parameters as well as properties of the litz wires used. Among other things, the properties can be divided into the type of insulation, the number of individual wires and their diameter. Within this publication, the essential process parameters are identified and evaluated in terms of the quality of the compaction by using suitable methods for measuring the node resistance.

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How to cite

APA:

Seefried, J., Riedel, A., Lohbauer, A., Baessler, H., Kühl, A., & Franke, J. (2021). Influencing Factors for the Ultrasonic Compacting Process of Insulated Litz Wires for Electric Drives. In 30th International Conference on Electrical Contacts, ICEC 2020 - Proceedings (pp. 599-606). Online, CH: Electrosuisse, Verband fur Elektro-, Energie und Informationstechnik.

MLA:

Seefried, Johannes, et al. "Influencing Factors for the Ultrasonic Compacting Process of Insulated Litz Wires for Electric Drives." Proceedings of the 30th International Conference on Electrical Contacts, ICEC 2020, Online Electrosuisse, Verband fur Elektro-, Energie und Informationstechnik, 2021. 599-606.

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