Deadbeat Power Distribution Control of Single-Stage Multiport Inverter-Fed PMSM Drive for Hybrid Electric Vehicles

Abstract

Single-stage multiport inverter (SSMI)-fed motor drives are promising solutions for multisource hybrid electric vehicles (HEVs) since the dc-dc converter is removed and all the active power is delivered within a single power conversion stage. However, this topology presents inherent coupled issues in controller design because power distribution should be achieved simultaneously in addition to stator current control. To address this issue, an equivalent two-level model is proposed to achieve decoupled control of the SSMI, where stator current control is achieved by regulating the active vectors, and power distribution is achieved by regulating the zero vectors. A deadbeat power distribution scheme is developed under the equivalent two-level model. The proposed scheme provides these advantageous features: fewer computational burdens without complicated sector selection and dwell time calculation under the unevenly distributed voltage vector diagram, fewer adjusted parameters, and fast dynamic response. Moreover, the power distribution capability of the SSMI with the proposed scheme is also analytically revealed. A series of experimental results demonstrate the excellent performance of the proposed deadbeat power distribution control scheme.