A new robust speed-sensorless control strategy for high-performance brushless DC motor drives with reduced torque ripple

作者：Niapour S A Kh Mozaffari^*; Tabarraie M; Feyzi M R

来源：Control Engineering Practice, 2014, 24: 42-54.

DOI：10.1016/.conengprac.2013.11.014

• H-infinity deconvolution filter
• Brushless dc (BLDC) motor
• Sensorless control
• High-performance drive
• Torque ripple

This paper presents an analysis, design, and strategy of a high-performance speed-sensorless control scheme for estimating the phase-to-phase trapezoidal back-EMF of BLOC motor drive by means of a novel stochastic deconvolution technique in the H-infinity setting, named robust stochastic H-infinity deconvolution filter. In the proposed method, unlike the conventional observer-based approaches, the back-EMF is considered as an unknown input, and no need is felt for the constancy assumption of the rotor position and speed of machine within a short period of the time in the modeling of the BLDC motor which leads to ignoring the back-EMF dynamic at high and variable speed. In addition, since high-speed operation is vital for the motor, an improved approach has also been proposed to reduce the commutation-torque-ripple at high-speed for direct torque control (DTC) strategy of three-phase BLDC motor with 120 degrees conduction mode in parallel with the proposed method due to the fact that drive performance intensely downgrades in this mode.

• 出版日期2014-3