06-09-2017, 12:58 PM
Most electrical drive systems are three-phase systems. Recently, some quasi-four phase systems employing the neutral leg have also been used for harmonic optimization and fault tolerance units. Three-phase drive systems have been widely used for years because of the availability of such machines, their inverters, modeling and control. However, polyphase systems have been used in the past in drive systems where an induction machine with asymmetric windings has 30-degree advanced three-phase assemblies for twelve-step industrial applications. Such multiphase drives are likely to be limited to specialized applications where high performance and reliability (such as EV, HEV, aerospace, ship propulsion and high power applications) are required and where cost requirements are not so oppressive in comparison with the general environment.
Recent literature indicates several advantages for the use of a multi-polar multi-polar electric machine in hub wheel systems - high torque low speed motors can directly drive systems, avoiding mechanical losses incurred by the clutch, reduction and differential gear during the transmission of power from the engine to the wheels. This work presents the design, analysis, simulation, modeling and implementation of control of a high-speed, multi-phase, high torque and low speed permanent magnet brushless DC machine. The work focuses on issues related to high level modeling, composed of a transient model, along with the corresponding experimental evaluation. Analyses were performed to bring together the modeling efforts with expected behavior to obtain realistic simulation results verified by the experimental setup; comprehensive experimental results corroborate the work.
Recent literature indicates several advantages for the use of a multi-polar multi-polar electric machine in hub wheel systems - high torque low speed motors can directly drive systems, avoiding mechanical losses incurred by the clutch, reduction and differential gear during the transmission of power from the engine to the wheels. This work presents the design, analysis, simulation, modeling and implementation of control of a high-speed, multi-phase, high torque and low speed permanent magnet brushless DC machine. The work focuses on issues related to high level modeling, composed of a transient model, along with the corresponding experimental evaluation. Analyses were performed to bring together the modeling efforts with expected behavior to obtain realistic simulation results verified by the experimental setup; comprehensive experimental results corroborate the work.