Magnetic Equivalent Circuit Modeling of the AC Homopolar Machine for Flywheel Energy Storage

Severson, Eric L.; Nilssen, Robert; Undeland, Tore; Mohan, Ned

doi:10.1109/tec.2015.2441040

Cited by 66 publications

(31 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A lo largo del siglo XX su uso se limitó a aplicaciones tales como la fusión eléctrica, soldadura eléctrica y tratamientos térmicos que requerían fuentes de alimentación con frecuencias comprendidas entre 1.000 y 10.000 Hz (Walker, 1946). Actualmente hay un renovado interés por los AI, que se están utilizando en los sistemas de iluminación y aire acondicionado de los ferrocarriles (Pillai et al, 2008), en grandes vehículos especiales para minería y obra civil (Milspec Manufacturing) y, especialmente, en aplicaciones a altas velocidades de rotación, acoplados a un volante de inercia (Severson et al, 2015) o al eje de una turbina de gas, en generadores superconductores (Sivasubramaniam et al, 2009). …”

Section: El Alternador Inductorunclassified

Generadores Síncronos de Alta Velocidad: Una Evaluación Crítica

Martínez

Andrada

2017

Inf. tecnol.

View full text Add to dashboard Cite

ResumenConsiderando que existen restricciones electromagnéticas, mecánicas y térmicas que condicionan el diseño de las máquinas eléctricas de alta velocidad, se establecen los criterios que conducen a una adecuada selección de la máquina. Además, teniendo en cuenta el estado actual de la tecnología, se presentan los valores críticos en la relación (potencia de salida)/(velocidad de rotación). El artículo se centra en los generadores síncronos de alta velocidad, especialmente en los generadores con imanes permanentes, los alternadores inductores y los alternadores con conmutación de flujo, haciendo hincapié en sus fundamentos constructivos y en sus ventajas e inconvenientes. El análisis se completa con una evaluación crítica que los clasifica, de acuerdo con unos requisitos previamente definidos. Aunque la decisión de la elección final está muy condicionada por la aplicación de interés, puede afirmarse que, en general, los generadores síncronos con imanes permanentes en el rotor constituyen la mejor opción. Palabras clave: máquinas eléctricas de alta velocidad; generadores síncronos; alta frecuencia; alternadores inductores High-Speed Synchronous Generators. A Critical Assessment AbstractConsidering that there are electromagnetic, mechanical and thermal constraints that determine the design of high-speed electrical machines, the criteria that lead to adequate selection of the machine are established in this work. Moreover, taking into account the current state of technology, the critical values in the ratio (output power)/(rotation speed), are presented. The paper focuses on the high-speed synchronous generators, especially in permanent magnet generators, inductor alternators and flux switching alternators, emphasizing their constructive fundamentals and their advantages and disadvantages. The analysis is completed with a critical assessment that classifies them according to previously defined requirements. Although the decision of the final choice is largely determined by the application of interest, it can be said that, in general, synchronous generators with permanent magnets in the rotor are the best option.

show abstract

Section: El Alternador Inductorunclassified

Generadores Síncronos de Alta Velocidad: Una Evaluación Crítica

Martínez

Andrada

2017

Inf. tecnol.

View full text Add to dashboard Cite

show abstract

“…HSM have robust rotor design and due to their lower standby losses compared to PMSM, they can be used an alternative to PMSM in high-speed applications [25,30]. However, the main disadvantage is the difficult design of HSM due to its complex magnetic flux paths and geometry [31].…”

Section: Introductionmentioning

confidence: 99%

Performance and Loss Analysis of Squirrel Cage Induction Machine Based Flywheel Energy Storage System

et al. 2019

View full text Add to dashboard Cite

Flywheel energy storage systems (FESS) are one of the earliest forms of energy storage technologies with several benefits of long service time, high power density, low maintenance, and insensitivity to environmental conditions being important areas of research in recent years. This paper focusses on the electrical machine and power electronics, an important part of a flywheel system, the electrical machine rotating with the flywheel inertia in order to perform charge-discharge cycles. The type of machine used in the electrical drive plays an important role in the characteristics governing electrical losses as well as standby losses. Permanent magnet synchronous machine (PMSM) and induction machines (IM) are the two most common types of electric machines used in FESS applications where the latter has negligible standby losses due to its lower rotor magnetic field until energised by the stator. This paper describes research in which the operational and standby losses of a squirrel-cage induction machine-based flywheel storage system (SCIM-FESS) are modelled as a system developed in MATLAB/Simulink environment inclusive of the control system for the power electronics converters. Using the proposed control algorithm and in-depth analysis of the system losses, a detailed assessment of the dynamic performance of the SCIM-FESS is performed for different states of charging, discharging, and standby modes. The results of the analysis show that, in presence of system losses including aerodynamic and bearing friction losses, the SCIM-FESS has satisfactory characteristics in energy regulation and dynamic response during load torque variations. The compliance of FESS and its conversion between the generating and motoring mode within milliseconds show the responsiveness of the proposed control system. Appl. Sci. 2019, 9, 4537 2 of 26 there are various solutions proposed to ensure network stability and reliability with RES including demand management, interconnection with external grids, and ESS [5].There are ranges of systems involved in energy storage process, which can convert, store and deliver energy on demand. Performance of these systems depends on the amount of energy they can store, the storage time and delivery of energy with minimum losses [6]. Therefore, high power capability, high efficiency, low capital cost and environmentally friendly attributes improve the value of ESS [7].A FESS is an assembly of a rotating mass, electrical machine, power electronics converter, bearing system and containment. The design of the rotor used in FESS depends on the materials from which they are made. Solid disk or solid cylinder are made from isotropic materials like steel. Rim type or hollow cylinder flywheel rotors are constructed from non-isotropic material like composite carbon fiber. Solid disk or solid cylinder flywheel rotors have simple construction and are commonly used [8]. Solid rotor flywheels exhibit less displacement from axes due to centrifugal forces hence simplifying flywheel attachment to the shaft and with ele...

show abstract

“…In 1 study, the modified WFT has been proposed for machines with the asymmetrical air gap by Faiz et al but saturation effect has been neglected. Recently, there have been some new investigations on MEC modeling besides WFT and FEM . In these researches conducted in MEC modeling area, the magnetic and electric equations have been considered separately and some technical approaches have been used for their coupling.…”

Section: Introductionmentioning

confidence: 99%

“…It is shown that the performance of the mesh‐based model is more effective than of the nodal‐based model under nonlinear operation. Magnetic equivalent circuit modeling of the healthy AC homo‐polar machine considering saturation effect has been presented in 1 study, but the faulty machine has been not studied. In 1 study, a hybrid model has been addressed on the basis of Fourier modeling combination method with mesh‐based MEC method but linear core characteristics have been used; therefore, saturation effect has been not considered.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, there have been some new investigations on MEC modeling besides WFT and FEM. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] In these researches conducted in MEC modeling area, the magnetic and electric equations have been considered separately and some technical approaches have been used for their coupling. However, these ways cussed excessive complexity in modeling and simulation methods, which may lead to a large simulation processing time.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and stator Inter‐Turn short circuit fault detection for saturable salient pole synchronous machine by a non‐linear magnetic equivalent circuit approach

Naderi

Ghandehari

2017

Int J Numerical Modelling

View full text Add to dashboard Cite

This paper presents a novel and adequate model for healthy and faulty salient pole synchronous machines with and without interturn short circuit fault. The model is presented for a machine with arbitrary pole numbers, arbitrary damper bars, and stator slot numbers. The magnetic equivalent circuit with nonlinear elements is used for modeling, and numerical techniques based on Newton‐Raphson method have been approved for solving of nonlinear equations. Because the design of electric machines is based on the knee point of a B‐H curve, consideration of saturation effect is mandatory for adequate studying. Because of the saturation effect, there are some nonlinear algebraic magnetic equations, which should be solved simultaneously with differential equations. Trapezoidal technique is used for differential equations converting to algebraic type, and Newton‐Raphson method is used for a nonlinear set equation solving. Stator current signature analysis is used for stator interturn short circuit fault detection. Finally, obtained results by finite element method are used to verify the effectiveness of the proposed modeling method. The proposed approach for magnetic equations based on nodal potential and reluctance mesh model equations is one of the paper novelties for the salient pole synchronous machine modeling in both healthy and faulty cases. This dynamic modeling method has less complexity compared to finite element method and pure nodal potential approaches. Solving the electric and magnetic equations by a single set of equations is the main advantage of the presented method, which has been addressed for a salient pole synchronous machine for the first time. Another advantage of the proposed study is the capability of modeling the healthy and faulty machine with interturn fault by a single model.

show abstract

Magnetic Equivalent Circuit Modeling of the AC Homopolar Machine for Flywheel Energy Storage

Cited by 66 publications

References 37 publications

Generadores Síncronos de Alta Velocidad: Una Evaluación Crítica

Generadores Síncronos de Alta Velocidad: Una Evaluación Crítica

Performance and Loss Analysis of Squirrel Cage Induction Machine Based Flywheel Energy Storage System

Modeling and stator Inter‐Turn short circuit fault detection for saturable salient pole synchronous machine by a non‐linear magnetic equivalent circuit approach

Contact Info

Product

Resources

About