[Objective] Although integer-slot flat-wire motors offer high power density and efficiency

they suffer from significant drawbacks

including high copper usage

substantial copper loss

and severe heat generation in the winding end regions. Therefore

this paper proposes a dual-rotor motor structure designed to reduce copper loss and enhance overall motor efficiency. [Methods] Radial concentrated winding technology was adopted for both the inner and outer stator windings

significantly reducing copper usage and associated losses at the motor ends. Meanwhile

by increasing the amount of permanent magnet material and optimizing the overall motor performance with the finite element method

the power factor and maximum output power were effectively enhanced

while the increase in iron loss was kept to a minimum. [Results] The research findings were as follows: with the flat-wire radial concentrated winding technology

the end impedance parameters (resistance/reactance)

copper loss

and magnetic flux leakage were all reduced by 50% synchronously. Furthermore

under the constant-volume constraint

electromechanical co-optimization was achieved

whereby the power factor was enhanced and the maximum output power was increased. The cooling system was designed to elevate the peak efficiency

enabling the coincidence of the high-efficiency and high-power-factor regions across all operating conditions

including overload. [Conclusion] The strong consistency between simulation and theoretical calculations confirms the significant advantages of the dual-rotor motor in terms of high efficiency and high power factor

establishing a new paradigm for the design of high-density motors.