Quad-motor drive (QMD) systems enable fully independent torque control at each wheel and are increasingly adopted in high-performance electric vehicles (EVs). However, compared with single-motor drives, current measurement errors (CMEs) in QMD architecture accumulate across multi-motor subsystems, leading to amplified torque and speed ripple as well as asymmetric current sharing. This paper proposes a correlative correction strategy for QMDs based on a distributed calibration approach (DCA).
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