The requirements for electrical machines in different applications continue to increase in terms of power density and efficiency. The use of Hairpin windings represents a new technological solution that sees growing attention thanks to its benefits deriving from electromagnetic and thermal performance. The Hairpin windings are made up of solid conductors and compared to the classic wire winding can achieve a higher fill factor.
This aspect makes the use of Hairpin windings very attractive in projects and developments of electric machines where a high power density and efficiency is required.
Among the most relevant advantages are:
Increase of the fill factor up to 75%;
High torque at low speeds;
A higher phase current is allowed;
Easier heat transfer.
Furthermore, a Hairpin winding gives greater solidity to the machine heads so as to guarantee the strength required in different applications.