<p>To address the technical challenges posed by limited installation space and inadequate thermal management in wheel hub motor applications, this study systematically investigates the application of innovative FeCo-based permanent magnet (PM) materials. The demagnetization curves of NdFeB, FeCo-based, and Sm₂Co₁₇ PMs were experimentally tested, and their fundamental magnetic properties were compared. Analytical expressions for relevant electromagnetic parameters were derived, revealing the mechanisms through which temperature influences these parameters. Furthermore, a finite element model of a hub motor was developed, three structurally identical motors, each using one of the aforementioned magnet types, were analyzed through finite element simulations. The comparison included torque, input current, no-load back electromotive force, air-gap magnetic flux density, PM eddy current loss, copper loss, iron loss, efficiency, peak power, and demagnetization resistance, under both constant load and constant current conditions across a range of temperatures. Results indicate that the FeCo-based motor exhibits superior electromagnetic performance within the 80 °C to 160 °C operating range. Under identical current-source control, it achieves higher torque density, power density, and efficiency. Under constant load, it requires lower input current while maintaining elevated efficiency. Additionally, the FeCo-based exhibits enhanced demagnetization resistance. The simulation results align closely with the theoretical analysis, confirming the reliability of the findings.These findings provide guidance for PM selection in high-temperature PM motor design.</p>