Axial field flux-modulation permanent magnet (AF-FMPM) machines have been developed for direct drive applications such as wind power generation, HEVs, and railway traction. However, the existing studies on AF-FMPM are limited to PM rotor structure, less research has carried out with stator structure. This paper two axial machines, i.e., NS or NN type, which all consist of same structures but du...

This paper presents a novel procedure for the emergency sensorless operation of six-phase electric drive. More degrees freedom provided by multiphase technology have been utilized to determine rotor flux position. The proposed technique is based on direct measurement back EMF generated disconnected three-phase winding permanent-magnet synchronous machine (PMSM). method suitable an drive in case...

Permanent Magnet Synchronous Machines (PMSMs) have several advantages, such as high efficiency and low volume and weight, which make them attractive for aerospace applications and high performance servo drives. Matrix Converters (MCs) are an all-silicon alternative, with no bulky reactive elements, to the standard voltage source inverter. The most common control technique for such PMSMMC-fed dr...

To improve the endurance mileage of electric vehicles (EVs), it is important to decrease the energy consumption of the Permanent Magnet Synchronous Motor (PMSM) drive system. This paper proposes a novel loss optimization control strategy named system efficiency improvement control which can optimize both inverter and motor losses. A nonlinear power converter loss model is built to fit the nonli...

A fault-tolerant permanent-magnet vernier (FT-PMV) machine is designed for direct-drive applications, incorporating the merits of high torque density and high reliability. Based on the so-called magnetic gearing effect, PMV machines have the ability of high torque density by introducing the flux-modulation poles (FMPs). This paper investigates the fault-tolerant characteristic of PMV machines a...