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This paper proposes the design and analysis of a flux modulated (FM) permanent magnet (PM) linear actuator for the long track gantry robot system used to detect fire hazards in an electric energy storage system (ESS). A detailed design framework for the FM-linear actuator inspired by the magnetic gearing effect is proposed which includes the selection of slot-pole pair numbers and assigning optimal geometric parameters based on working harmonic characteristics. Using the optimal model, the electromagnetic performances both under no-load and full load conditions are performed to check the feasibility of the actuator for the gantry system. A prototype is built to validate the results obtained using the 2D and 3D finite element analysis (FEA). [ABSTRACT FROM AUTHOR]

Recently, the permanent magnet vernier machine (PMVM) is studied extensively because of its merits such as the high torque density. Similar to the magnetic gears, the PMVM operates on the principle of flux modulation. However, there is a distinct difference in between the two as unlike the magnetic gear, in case of PMVM, the winding MMF harmonics rotates with different speed as that of the fundamental. As a result, these harmonics are capable of making a working magnetic field by interacting with different permeance harmonics. Therefore, this paper aims to provide an analytical explanation of this whole process, which is helpful to understand the effect of the flux modulation on the output torque. Furthermore, using the analytical formulation, this work finds the optimal geometric parameters which maximize the working magnetic field and hence the torque. A detailed analysis of the PMVM with the doubly salient structure is studied and the performance is analyzed using the finite element method (FEM) and the experimental setup. The FEM and experimental results verify the maximum torque production by using the optimal geometric parameters in the PMVM modeling, obtained using the analytical formulation. [ABSTRACT FROM AUTHOR]

• Transmission line robots use batteries or diesel generators as a power source. • There is a need to find a sustainable and greener alternative as a power source. • Purpose is served by using a dual-core electromagnetic energy harvester. • The electromagnetic design, analytical model, airgap shape design are considered. • 3D-finite element coupled with MATLAB in python is used to analyze the harvester. The present work proposes the design process of a novel dual-core electromagnetic energy harvester (EMEH) for the use in a deicing robot, used on power transmission lines. The EMEH is designed with a dual-core where Silicon (Si) and Nickel (Ni) steels have been used in order to take advantage of both materials characteristics. An analytical model for the EMEH has been proposed in this paper which is compared with the 3D finite element method (FEM) based model of the EMEH under the same design specification. Moreover, considering the magnetic equivalent circuit model of the EMEH, equivalent circuit parameters are determined. Furthermore, to obtain the impedance matching and to extract the maximum real power from the EMEH, power optimization circuit consisting of a capacitor and a buck-boost converter is proposed and the parameters for the power optimization circuit are evaluated. To validate the effectiveness of the EMEH and its power optimization circuit, a co-simulation design platform is developed using the 3D-FEM and MATLAB coupled in a python-based environment. On the co-simulation platform, the charging of a rechargeable battery of 15 V is verified. [ABSTRACT FROM AUTHOR]

This paper proposes a design method for the flux modulation poles (FMPs) formed on the stator of surface-mounted permanent magnet vernier machines (SPMVM) considering the winding configurations. In three types of the SPMVM with the different winding configurations, the FMP shapes to maximize the output torque are optimized by employing the analytical equations for the magneto-motive force (MMF) due to the windings, permeance, and flux density in the air-gap. Then, the validity of the optimal shapes for the FMPs is verified by the finite element analysis. It is found that the optimal FMP shapes are designed differently in the three types of the SPMVM and increase the output torque by different ratios according to the winding configurations. In addition, the experimental results for the prototype show that the proposed method can optimally design the FMP shape by analyzing mathematically the effects of the winding configuration and the FMP shape on the output torque of the SPMVM. [ABSTRACT FROM AUTHOR]