Three years in the past, Marsilli, a producer of electrical motor winding and meeting techniques, introduced the event of a novel expertise referred to as Distributed Excessive-Density (DHD) stator winding. This patented answer is designed to offer a superior various to at present out there motor winding applied sciences.

Now Marsilli has introduced that the expertise is mature. The corporate is concerned in a number of pilot tasks, and is collaborating with companions and clients on new tasks to convey DHD to the market.

Based on Marsilli, DHD “takes the most effective options from insertion (pull-in) and hairpin winding applied sciences,” and is appropriate for a variety of motor sizes, purposes and industries, together with EV traction motors.

Marsilli’s answer makes use of skinny spherical enameled copper wire wound in a precisely-layered sample. This maximizes the slot filling issue, and thus minimizes stator DC copper losses. The usage of a number of strands in hand additionally considerably reduces stator copper AC losses because of the pores and skin impact. DHD winding expertise additionally makes use of an entire turns transposition, which helps to attenuate high-frequency stator copper AC losses because of the proximity impact.

The presence of the pole shoe and the potential for adjusting the slot opening width as obligatory assist to scale back torque ripple, which may additionally ship a discount in mechanical vibration. DHD additionally minimizes the variety of wire connections, which requires fewer welding factors and allows a cleaner and extra dependable course of.

DHD-wound prototypes have been manufactured and examined, and their efficiency has been in contrast with hairpin motors with related options. The outcomes confirmed a comparable effectivity at decrease speeds, because of the same copper filling issue, and superior effectivity (as much as 6% higher) at greater speeds, because of DHD’s decrease copper AC losses.

Supply: Marsilli