To address the problem that classical sliding mode control is difficult to balance chattering suppression and disturbance rejection for high‑performance control of permanent magnet synchronous motors (PMSMs)

an adaptive partitioning sliding mode control strategy is proposed. First

the application of sliding mode control to PMSMs and the effect of sliding mode chattering on system performance are discussed. A power law piecewise function is designed to modify the switching trajectory of the sliding mode controller

thereby mitigating system chattering. Second

considering the influence of uncertain disturbances in PMSMs on system convergence

a novel double‑power reaching law is constructed by combining the power‑law piecewise function with the sliding mode state variables

which reduces the adverse effect of the initial states and ensures finite‑time convergence. Then

a variable exponent term and an adaptive switching term are introduced into the dual‑power reaching law to divide the system into acceleration

transition

and convergence regions. An adaptive partitioning sliding mode control strategy is thereby established to suppress chattering while further improving disturbance rejection performance. Finally

experiments are conducted to verify the disturbance rejection capability and chattering suppression performance of the proposed method. The results demonstrate that the proposed method can effectively improve the control performance of PMSMs.