[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.