Mild-hybrid traction system based on a bidirectional half-bridge interleaved converter and a three-level active NPC inverter-fed PMSM

Abstract

In this paper a practical and original solution for a mild-hybrid traction system is proposed. It is based on a surface permanent magnet (SPM) synchronous motor drive supplied by a three-level active neutral point clamped (NPC) inverter and a bidirectional half-bridge interleaved converter on the battery side. Design issues, optimization (especially from the efficiency point-of-view) and advantages of the considered system architecture are analyzed through simulation and preliminary experimental results. A prototype hybrid traction test bench controlled by multiple digital signal controllers is proposed

Optimised Design of Permanent Magnet Assisted Synchronous Reluctance Machines for Household Appliances

“…The absence of excitation winding, in the rotor, and low back electro motive force lead to a safe behaviour in case of inverter failure and higher efficiency [16]. On the contrary, the well-known drawbacks of reluctance machines are the poor power factor and the non-negligible torque ripple [17]. The optimization of the machines' geometry can mitigate these drawbacks and maximize the motor performance.…”

Single and multiple switch fault‐tolerance capabilities in a hybrid five‐level inverter topology

“…Thus, an active NPC‐type (ANPC) topology is proposed in [7], which is developed by the addition of the power switches in place of clamping diodes to distribute power loss equally among the switches. Similar to ‘classical topologies’ of MLI, the ANPC inverter is also widely employed in high‐power medium‐voltage applications such as motor control in traction systems [8], distributed generation such as photovoltaic systems [9], and industrial motor drives [10]. These applications demand highly reliable operation of the inverter; otherwise, so can cause substantial economic loss.…”