Explanipedia

Design and Sensorless Control in Dual Three-Phase PM Vernier Motors for 5 MW Ship Propulsion Open

Vahid Teymoori, Nima Arish, Hossein Dastres, Maarten J. Kamper, Rong‐Jie Wang · 2025

Advancements in ship propulsion technologies are essential for improving the efficiency and reliability of maritime transportation. This study introduces a comprehensive approach that integrates motor design with sensorless control strateg…

Stability Analysis of Grid-Strengthening Geared Direct Grid-Connected Dual-Speed Slip-Synchronous Wind Turbines Open

Ryno Gerber, Maarten J. Kamper · 2025

The Blurry Line Between Tax Avoidance and Tax Evasion – Theoretical Framework and Game Theoretic Impact Open

Maarten J. Kamper, Markus Diller · 2025

Symmetrical Short-Circuit Behavior Prediction of Rare-Earth Permanent Magnet Synchronous Motors Open

F. Eichin, Maarten J. Kamper, Stiaan Gerber, Rong‐Jie Wang · 2024

Since the advent of rare-earth permanent magnet (PM) materials, PM synchronous machines (PMSMs) have become popular in power generation, industrial drives, and e-mobility. However, rare-earth PMs in PMSMs are prone to temperature- and oper…

Advancements in electrical marine propulsion technologies: A comprehensive overview Open

Nima Arish, Maarten J. Kamper, R. Wang · 2024

Single-Objective Machine Design with Gaussian Process Regression and Bayesian Optimization (Extended Version) Open

Johannes Roßmann, Maarten J. Kamper, Christoph M. Hackl · 2024

Due to the complex rotor design of reluctance synchronous machines, a finite element analysis is essential for the accurate calculation of machine relevant performance objectives. Reluctance synchronous machines tend to have a large torque…

Design and Optimisation of a 5 MW Permanent Magnet Vernier Motor for Podded Ship Propulsion Open

Nima Arish, Maarten J. Kamper, Rong‐Jie Wang · 2024

The evolution of electric propulsion systems in the maritime sector has been influenced significantly by technological advancements in power electronics and machine design. Traditionally, these systems have employed surface-mounted permane…

Single-Objective Machine Design with Gaussian Process Regression and Bayesian Optimization (Extended Version) Open

Johannes Roßmann, Christoph M. Hackl, Maarten J. Kamper · 2024

Due to the complex rotor design of reluctance synchronous machines, a finite element analysis is essential for the accurate calculation of machine relevant performance objectives. Reluctance synchronous machines tend to have a large torque…

Performance and Cost Comparison of Drive Technologies for a Linear Electric Machine Gravity Energy Storage System Open

Morris Mugyema, Maarten J. Kamper, Rong‐Jie Wang, A.B. Sebitosi · 2024

Energy storage is a crucial technology for facilitating the integration of renewable energy sources (RES), such as wind and solar energy, into the electrical grid. The challenge of maintaining a balance between incoming and outgoing grid p…

Simple and Robust MPPT Current Control of a Wound Rotor Synchronous Wind Generator Open

Lucky Dube, Graham C. Garner, Karen S. Garner, Maarten J. Kamper · 2023

In the search for efficient non-permanent magnet variable-speed wind generator solutions, this paper proposes a maximum power point tracking (MPPT) current-control method for a wound rotor synchronous wind generator. The focus is on direct…

Nonlinear Three-Phase Reluctance Synchronous Machine Modeling With Extended Torque Equation Open

Johannes Roßmann, Niklas Monzen, Maarten J. Kamper, Christoph M. Hackl · 2023

Reluctance synchronous machines (RSMs) are characterized by high nonlinearities, cross-coupling effects and high torque ripple. This paper presents a nonlinear machine model of three-phase RSMs based on a nonlinear electromagnetic model in…

Nonlinear Three-Phase Reluctance Synchronous Machine Modeling With Extended Torque Equation Open

Johannes Roßmann, Niklas Monzen, Maarten J. Kamper, Christoph M. Hackl · 2023

Reluctance synchronous machines (RSMs) are characterized by high nonlinearities, cross-coupling effects and high torque ripple. This paper presents a nonlinear machine model of three-phase RSMs based on a nonlinear electromagnetic model in…

Sensorless Control of Dual Three-Phase Permanent Magnet Synchronous Machines—A Review Open

Vahid Teymoori, Maarten J. Kamper, Rong‐Jie Wang, Ralph Kennel · 2023

This paper presents an overview of various sensorless control methods, with a focus on dual three-phase permanent magnet synchronous machines (DTP-PMSM). Owing to the important role that DTP-PMSMs play in motion-control applications in ind…

On the Design and Topology Selection of Permanent Magnet Synchronous Generators for Natural Impedance Matching in Small-Scale Uncontrolled Passive Wind Generator Systems Open

Casper Labuschagne, Maarten J. Kamper · 2022

Small-scale uncontrolled passive wind generator systems are an attractive solution for rural energy generation because of the system’s reliability and low cost. However, designing these uncontrolled wind generators for good power matching …

Evaluation of Drive Cycle-Based Traction Motor Design Strategies Using Gradient Optimisation Open

Stavros Pastellides, Stiaan Gerber, Rong‐Jie Wang, Maarten J. Kamper · 2022

In this paper, two design optimisation methods are evaluated using gradient-based optimisation for electric vehicle traction applications. A driving cycle-based approach is used to evaluate specific operational points for the design optimi…

Optimization and Performance Evaluation of Non-Overlap Wound-Field Converter-Fed and Direct-Grid Wind Generators Open

Karen S. Garner, Udochukwu B. Akuru, Maarten J. Kamper · 2022

Non-overlap winding technology continues to remain relevant in the design of wound-field machines as an alternative for high torque density permanent magnet machines. In this paper, the finite element analyses-optimisation of two variants …

Performance Evaluation of Harmonic Reduced Non-Overlap Winding Wound Rotor Synchronous Machine Open

Karen S. Garner, Maarten J. Kamper, Andrew T. Loubser · 2021

The analysis and performance evaluation of a harmonic reduction strategy of a non-overlap winding wound rotor synchronous machine is conducted in this paper. The harmonic reduction strategy utilizes phase-shifts between coil currents to re…

Potential of Slip Synchronous Wind Turbine Systems: Grid Support and Mechanical Load Mitigation Open

Dillan K. Ockhuis, Maarten J. Kamper · 2021

Wind power penetration into existing electrical power systems continues to experience year-on-year growth. Consequently, modern wind turbine systems (WTS) are required to comply with relevant grid codes and provide ancillary grid services …

Analytical Modeling of Surface-Mounted and Consequent-Pole Linear Vernier Hybrid Machines Open

C.D. Botha, Maarten J. Kamper, Rong‐Jie Wang, Abdoulkadri Chama · 2021

CITATION: Botha, C. D., et al. 2021. Analytical modeling of surface-mounted and consequent-pole linear vernier hybrid machines. IEEE Access, 9:26251-26259, doi:10.1109/ACCESS.2021.3057716.

Wind Generator Impedance Matching in Small-Scale Passive Wind Energy Systems Open

Casper Labuschagne, Maarten J. Kamper · 2021

CITATION: Labuschagne, C. J. J. & Kamper, M. J. 2021. Wind generator impedance matching in small-scale passive wind energy systems. IEEE Access, 9:22558-22568, doi:10.1109/ACCESS.2021.3056226.

Levelised Cost of Storage Comparison of Energy Storage Systems for Use in Primary Response Application Open

Morris Mugyema, C.D. Botha, Maarten J. Kamper, Rong‐Jie Wang, A.B. Sebitosi · 2021

Cross-Coupling Inductance Parameter Estimation for More Accurate Performance Evaluation of Wound-Field Flux Modulation Machines Open

Mkhululi Mabhula, Udochukwu B. Akuru, Maarten J. Kamper · 2020

In this paper, a proposed numerical frozen permeability modeling procedure is fully derived to accurately estimate the parameters of two variants of wound-field flux modulation machines (WF-FMMs) namely: wound-field flux switching machine …

Coupled circuit analysis of the brushless doubly fed machine using the winding function theory Open

O. I. Olubamiwa, Nkosinathi Gule, Maarten J. Kamper · 2020

The brushless doubly fed induction machine (BDFM) is considered as an alternative to doubly fed induction generators (DFIGs) in wind energy conversion systems. However, BDFMs have a complex machine structure, and their operations are relat…

Potentials of locally manufactured wound-field flux switching wind generator in South Africa Open

Udochukwu B. Akuru, Maarten J. Kamper · 2019

The China-based monopoly of high-energy permanent magnet materials used in modern wind generators impact the economic viability and local content value of most wind turbines installed in South Africa, especially large installations. It is …

Evaluation of a magnetic gear for air‐cooled condenser applications Open

Alexander Matthee, Rong‐Jie Wang, Charles Johannes Agenbach, Daniel N.J., Maarten J. Kamper · 2018

In high‐power industrial applications such as air‐cooled condenser fans, excessive mechanical gear failures highlight a need to investigate possible alternatives. In this study, the concentric magnetic gear (CMG) is evaluated as a potentia…

Non-contact experimental methods to characterise the response of a hyper-elastic membrane Open

Maarten J. Kamper, Anriëtte Bekker · 2017

CITATION: Kamper, M. & Bekker, A. 2017. Non-contact experimental methods to characterise the response of a hyper-elastic membrane. International Journal of Mechanical and Materials Engineering, 12:15, doi:10.1186/s40712-017-0082-6.

Nonlinear PI current control of reluctance synchronous machines Open

Christoph M. Hackl, Julian Kullick, Maarten J. Kamper, J. Mitchel · 2015

This paper discusses nonlinear proportional-integral (PI) current control with anti-windup of reluctance synchronous machines (RSMs) for which the flux linkage maps are known. The nonlinear controller design is based on the tuning rule "Ma…

Contemporary wind generators Open

Udochukwu B. Akuru, Maarten J. Kamper · 2015

It is believed that wind energy is growing at a very rapid rate, especially in the last few years. When compared with other sources of renewable energy in the energy portfolio, it becomes evident that the bulk is wind energy-based. However…

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