Electric motor with bar winding and connection plates

A multiphase synchronous electrical machine for converting kinetic energy into electrical energy and electrical energy into kinetic energy has a rotor, extending along an axis, and a stator, which is provided with a stator pack having slots and with an electrical winding, which extends in part in the slots and in part at two heads arranged on opposite sides of the stator pack and which has bars, housed in the slots and connected to one at the heads, connection plates, each of which has: a main body having at least two seats for housing the bars; and an arm, which is set between the two seats and extends from the main body towards the axis.