Abstract
The disc coreless permanent magnet synchronous motor (DCPMSM) tend to have small inductance, and the current experiences stringent current ripple due to the IGBT's limited switching frequency. The MOSFET-based inverters can reduce the ripple by the high switching frequency, but it is not suitable to be applied in the high dc-link voltage (such as 510V) application because of its low voltage stress. A three-level neutral point clamped (NPC) inverter is proposed to drive DCPMSM in this paper. One improved finite-control-set model-predictive control (FCS-MPC) algorithm is proposed to reduce the calculation and the neutral-point voltage ripples. Comprehensive simulation and experimental results show that the proposed method can repress the current ripple by the small stator inductance, and get good neutral-point voltage balancing with low ripple.
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