Research on PMSM Control for Position Sensorless Based on Fractional PD Sliding Mode Observer

Abstract

According to the phase delaying question of estimated rotor position angle in traditional sliding mode observer, using fractional order calculus theory and singular perturbation two-time-scale decomposition theory, making up the parameter designing rules of fractional order PD sliding mode observer, proposed position sensorless control strategy for permanent magnet synchronous motor based on fractional order PD sliding mode observer. On one side, taking fast time-varying subsystem of singular perturbation two-time-scale decomposition theory to establish fractional order sliding mode observer; on the other side, taking slow time-varying subsystem of singular perturbation two-time-scale decomposition theory to obtain parameter of fractional order sliding mode observer. The results show that the method could not only making estimated rotor position angle follow actual rotor angle, but also establishing a global compensating control strategy of estimated rotor position angle effectively.

SM-PI Control Strategy of Electric Motor-Pump for Pure Electric Construction Machinery

“…The operational efficiency of PMSM is up to 97% [20], and it has the advantages of excellent speed regulation performance, high operational efficiency, high power density, small size and easy maintenance. PMSM is widely used in electric vehicles [24]- [26].…”

“…The design of sliding mode is independent of system parameters and external interference and has good robustness and anti-interference capability [17]. Scholars have also carried out relevant studies on the application of SMC in the field of electric motor control, realizing the estimation and adjustment of flux, current and speed [18]- [20]. Wang et al established a tracking control system of an adaptive fuzzy sliding mode by incorporating the integral term of the output tracking error.…”