Adaptively Adjustable Control Compensation With a Decoupling Basis for Current Control of All Parametric Variations’ IPMSM

In this paper, a simply and adaptively adjustable control with decoupling technique is proposed for robust current control in an interior permanent magnet synchronous motor (IPMSM). Based on the Lyapunov stability theorem, all parametric variations in an IPMSM are thoroughly considered without knowledge of variation bounds. The system robustness, as well as stability is guaranteed. Combined with simple decoupling terms provide control voltage basis under known modelled parameters. Adaptively equivalent proportional and integral compensation control speeds up current tracking response under all parametric variations in an IPMSM, which greatly reduces the computational burden of a microprocessor. To verify its practical effectiveness, the proposed straightforward control algorithm is implemented using a TMS320F28377 DSP. Comparative simulations show the IPMSM under large variations’ assumptions. Experimental results show that overshoot in q ‐axis current can be roughly reduced from 10% to 1.5%–2% and overshoot in d ‐axis current can be roughly reduced from 50% to 5%, respectively. Steady time in d‐q axes can be roughly reduced by 50%. It demonstrates the effectiveness and feasibility of the proposed control algorithm.