<p>The synchronous reluctance motor (SynRM), owing to its cost-effectiveness and favorable performance, has been widely adopted in industrial fan applications and AC speed control systems. However, due to the absence of permanent magnets, the excitation field is generated by the armature current, resulting in a relatively low power factor. Although increasing the rotor saliency ratio can mitigate this issue, an excessively high saliency, combined with magnetic saturation effects, leads to intensified airgap flux density harmonics, which exacerbate the torque ripple. Based on the airgap filed modulation theory, this paper investigates the torque ripple generation mechanisms of the SynRM. An FPGA controller is employed in this paper. By leveraging the parallel processing capability of the FPGA, the bandwidth of the current control loop is substantially enhanced, enabling an improved harmonic current response. The proposed method establishes a clear relationship between the rotor geometry of the synchronous reluctance motor and the torque ripple harmonics. This enables the optimization of the motor design to mitigate torque ripple at the source. This approach enhances the dynamic performance of the motor and allows for precise control of the current harmonic injection, resulting in more effective torque ripple suppression.</p>