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Stream/Area:
-
Subject:
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Paper ID:
IJSREM66053
Volume:
10 |
7 |
Jul 2026
Pages:
1-9
Publication Frequency:
Monthly (12 issues per year)
License:International Journal of Scientific Research in Engineering and Management follows the Creative Commons Attribution 4.0 (CC BY 4.0) License, allowing free use and distribution with proper attribution.
Department of Electrical Engineering
S. B. Patil College of Engineering, Indapur
Department of Electrical Engineering
S. B. Patil College of Engineering, Indapur
Department of Electrical Engineering
S. B. Patil College of Engineering, Indapur
Department of Electrical Engineering
S. B. Patil College of Engineering, Indapur
The massive transition toward electric propulsion requires unprecedented improvements in electric machine power densities, thermal dissipation, and industrial-scale manufacturability. Hairpin winding architectures—utilizing solid, rectangular profile copper bars rather than stranded round wire—have established themselves as the premier technological standard for automotive traction motors. This monograph presents a meticulously detailed exploration of the modern hairpin manufacturing lifecycle. We examine the fundamental electromagnetic principles that govern slot fill optimization, detail the step-by-step automated processing loop from mechanical 3D forming to visions-guided laser welding, analyze slot insulation systems, and mathematically explore high-frequency alternating current copper losses. Additionally, this study details inline End-of-Line verification models, establishing a robust operational baseline for advanced mass-production facilities.
KEYWORDS
A primary limitation of standard hairpin assembly is the vast number of individual laser welds required at the end-turns, which increases factory line footprint and inspection overhead. To eliminate this bottleneck, manufacturers are pioneering continuous wave winding. Instead of separate U-shaped pins, specialized high-speed CNC machines continuously bend a single long rectangular wire into a continuous wave pattern before rolling and inserting it. This eliminates up to 80% of the welded joints, drastically simplifying the manufacturing line and reducing structural weight.
1. International Electrotechnical Commission (IEC) 60034-18-41 - Qualification and type tests for Type I electrical insulation systems used in rotating electrical machines fed from voltage converters. 2. Society of Automotive Engineers (SAE) J2907 - Performance Rating of Electric Propulsion Motor and Inverter Assemblies. 3. IEEE Transactions on Transportation Electrification, Vol. 11, "Analysis of High-Frequency Losses and Thermal Management in Multi-Layer Hairpin Windings for Automotive Applications." 4. VDI 2858 Assembly Guidelines - Automated Assembly System Configurations for Electric Vehicle Traction Drives.
Publication Date
7/14/2026
Peer Review Type
Double-Blind Peer Review
Review Rounds: 2
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Conflict of Interest
The authors declare no conflict of interest related to this research work.
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