With motors used in electric vehicles and hybrid vehicles, the height of the coil end is reduced by welding and assembling the ends, thereby reducing both copper loss and motor size.
Motors
Rectangular wire welding
Combining Furukawa Electric's high-brightness fiber laser and beam profile control enables uniform welding even when there are gaps between rectangular wires by controlling the molten pool.
Example of rectangular wire hairpin welding
Round wire welding
The welding of tough pitch copper(Note 1) is difficult with conventional welding, but this has now been made possible without the formation of blowholes by controlling hardening time with Furukawa Electric's beam mode control to ensure sufficient gas diffusion.
(Note 1) Tough pitch copper contains trace amounts of oxygen, making it easy for blowholes to form as gas is generated as the temperature rises during welding.
Example of round wire hairpin welding
Inverters
High-depth, high-quality processing is realized by combining a high-brightness fiber laser and beam mode control, even for the various methods used to join inverter bus bars (copper plate).
Butt welding
(t2.5 mm copper plates)
Lap welding
(t0.5 mm copper plates)
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