Abstract：To address the issues of high-frequency chattering and harmonic interference in traditional sliding

mode observers for high-speed permanent magnet synchronous motors（HPMSM） under low carrier ratio

conditions，an adaptive discrete full-order sliding mode observer suitable for such conditions was designed. This

observer employed a quasi-proportional resonant regulator instead of the traditional sign function，effectively

filtering out high-order harmonics in the observer's state variables，reducing system chattering，and thus obtaining

accurate observed back electromotive force. To accurately extract rotor position information，a phase-locked loop

strategy based on complex coefficient filters was further proposed. Aiming at the coupling issue between the phaselocked loop and complex coefficient filters，an adaptive speed estimator with dynamic compensation was designed，which effectively solved the problem of increased rotor position estimation error caused by such coupling under low carrier ratios. Finally，experimental verification shows that the proposed strategy can maintain good dynamic response and stability under low carrier ratio conditions，meeting the requirements of high-precision control.

        Key words：high-speed permanent magnet synchronous motor（HPMSM）；low carrier ratio；discrete full-order sliding mode observers；complex coefficient filter

     Format Citation:樊生文，周皓婷，王云倩. 基于准PR调节器的HPMSM无感控制策略[J].电气传动, 2026,56(08):03-12. FAN Shengwen，ZHOU Haoting，WANG Yunqian. HPMSM non-inductive control strategy based on Quasi-PR regulator [J].Electric Drive,56(08): 03-12