Comparative Analysis of Rotor Position and Speed Extraction Schemes for Resolver Software Decoding in IPMSM Drive Applications

In the automated manufacturing industry, resolvers are commonly employed in the control systems of interior permanent magnet synchronous motor (IPMSM) to derive rotor position and speed information, owing to their high precision and reliability. In resolver software decoding, the extraction method utilized for determining the rotor position and speed significantly affects the control performance of IPMSM system. In this paper, phase-locked loop (PLL), extended state observer (ESO) and third-order nonlinear extended state observer (TNESO) are applied respectively to construct the extraction scheme. This paper presents a comparative analysis of three extraction schemes, and the performance of them are compared through the simulation experiments. The results indicate that the ESO scheme achieves optimal performance in steady state, but experiences a delay during transient state. TNESO scheme, on the other hand, boasts the fastest transient response speed while also meeting steady state estimation accuracy criteria. In comparison to the aforementioned methods, the TNESO scheme exhibits more satisfactory overall performance.