A Small-signal Stability Study for Open-loop I-f Control of Permanent Magnet Synchronous Machine Drives

Abstract

This paper deals with stability analysis of openloop I-f control for permanent magnet synchronous machine (PMSM) drives. The nonlinear system dynamics is linearized at steady state working point for analyzing the local stability of open-loop I-f control for PMSM. The analysis shows that the open-loop I-f control is poorly damped but can achieve stable operation in a wide speed range without the mid-frequency instability issue that commonly exists for the open-loop V/f control. In fact, the open-loop I-f control can operate stably from zero to rated speed under different load conditions. Extensive simulation results are presented to verify the theoretical analysis.

Permanent magnet synchronous motor control performed using PI-backstepping with a model of harmonics reduction

“…and 5 demonstrate that the controller maintains a high level of robustness despite parameter uncertainties/apprehensions and load torque disturbance change. Compared with other recent works in the field [18]- [20], the presented approach is much more reliable and accurate. It is stated that the findings of this study may be optimized utilizing a novel algorithm for mobile energy optimization by providing a heuristic solution based on the duties of the device [21]- [23].…”

I-F Control With Zero $D$-Axis Current Operation for Surface-Mounted Permanent Magnet Synchronous Machine Drives

“…Besides working as a startup method, there is also great interest in scalar control as a standalone scheme for widespeed-range operations. Conventional open-loop scalar control is poorly damped and inefficient [15], [17], [27]. Many improved versions have been developed over the past 30 plus years [15]- [26].…”