Control of a four-phase switched reluctance generator: experimental investigations

Chancharoensook, P.; Rahman, M.F.

doi:10.1109/iemdc.2003.1210333

Cited by 18 publications

(11 citation statements)

References 13 publications

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“…Previous and older treatments of SRG have focused on the design of high-speed SRG (see [5] and the references cited therein), which mainly rely on the regular magnetic structures [6] of two opposing stator poles, per phase, and a minimal number of rotor poles. The SR machine can be easily controlled and matched to its load by controlling the instants of energizing and deenergizing the stator phases.…”

Section: Introductionmentioning

confidence: 99%

Similarity laws in low speed switched reluctance machines design

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Dente

Martins

et al. 2017

2017 52nd International Universities Power Engineering Conference (UPEC)

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-This paper presents a set of similarity laws appropriate for low speed switched reluctance machines design. Design methodologies of switched reluctance machines for low speed applications are generally oriented towards the choice of suitable combinations of stator and rotor poles in regular topologies. The proposed similarity laws provide an easy-to-use and robust methodology to compare different magnetic topologies, regular or non-regular, and have the capability to incorporate thermal and magnetic saturation phenomena by introducing constraints. With the assistance of finite-element analysis the issues surrounding the design of low speed SR multimachines topologies are discussed, leading into consideration of modular non-regular topologies. Using similarity laws, the modular topology is compared with a regular switched reluctance machine. The comparison results point out the reduction of copper losses of the modular topology over the regular topology. This paper extends previous discussions of switched machine design into a more general context.

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Section: Introductionmentioning

confidence: 99%

Similarity laws in low speed switched reluctance machines design

Lobato

Dente

Martins

et al. 2017

2017 52nd International Universities Power Engineering Conference (UPEC)

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“…Currently the synchronous and induction machines dominate the market of wind energy applications, although, the SRM has been the subject of current investigation and it shows to be a valid alternative for this field [2], [3] and [4].…”

Section: Introductionmentioning

confidence: 99%

Notice of Violation of IEEE Publication Principles - The use of Switched Reluctance menerator in wind energy applications

Darie

Cepișcă²

2008

2008 13th International Power Electronics and Motion Control Conference

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Using of the wind energy has become increasingly important as a renewable energy source and therefore is an increasing interest in exploiting it using a Switched Reluctance Machine as a generator and optimize its characteristics in this domain. This work analyzes the generator mode of the Switched Reluctance Machine in the direct coupling to the turbine shaft and coupled to the shaft through a gearbox.

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“…Regarding the air gap lengths, it is assumed that ≪ . In these terms, the electromagnetic torque is given by the derivative of the coenergy with respect to the rotor position (4) and the maximum torque is given by (5). The electromagnetic power in the generator regime as well as in the motor regime, shown in Fig.2, is calculated using the average torque 〈 〉 by (6).…”

Section: A Simplified Modelmentioning

confidence: 99%

“…Moreover, robustness and simple construction (only concentrated coils on the stator), control flexibility, high fault tolerance in a wide speed range [4][5], make this machine suitable for direct drive energy converters and attractive for harsh environmental applications. Previous and older treatments of SRG have focused on the design of high-speed SRG (see [6] and the references cited therein), which mainly rely on the regular magnetic structures of two opposing stator poles, per phase, and a minimal number of rotor poles.…”

Section: Introductionmentioning

confidence: 99%

Field-based models for low speed switched reluctance machine designs

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Dente

Martins

et al. 2016

2016 10th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG)

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-This paper presents a design assistance methodology of low speed Switched Reluctance Machines (SRM) using field-based models. The magnetic properties of the iron, the number of rotor poles, and the number of poles per phase, all play a significant role in the machine design. The proposed comparison procedure uses field-based models along with scale models, based on similarity laws, to compare SRM designs. The field-based models are here applied in dimensional analysis of regular and non-regular topologies distinguished by different characteristics of electric and magnetic circuits. As an added value for this methodology, similarity laws take into account physical phenomena like thermal changes and magnetic saturation. Hypotheses introduced in the methodology formulation were verified by finite element analysis. This work is motivated by the application of SRM to direct drive wind converters and other low speed renewable energy systems. As an application example of this methodology, a non-regular topology with short flux-paths was compared with a regular prototype, 3-phase, 12/16, SRM, designed for a direct drive wind turbine: a gain of power per unit of mass is achieved with the former one.Keywords -Field-based model, Similarity Laws, Low Speed Switched Reluctance Machine, Machine Design. I. INTRODUCTIONFollowing the tendency of offshore wind turbine installation and the enlargement of the wind turbine capacity, directly driven generators are gaining increasing interest on this particular research field of low speed energy conversion. Direct drive energy converters take important benefits from the elimination of the gearbox, which has traditionally been used to interface a slowly prime mover shaft with the generator shaft. In fact, the gearbox is a considerable cost component that reduces the system reliability and its overall efficiency [1]. Furthermore, the actual trend of exploring the offshore wind resources makes robustness and reliability vital to the economic operation of wind turbines in that specific environment. This work is motivated by the application of Switched Reluctance Generator (SRG) to direct-drive wind turbines and other low speed renewable energy systems.The option for the SRG topology analysis chosen by the authors for the proposed paper was also supported in the steep rise of the neodymium permanent magnet price, which is taking the focus off the recently successful directly driven permanent magnet synchronous generator [2].The Switched Reluctance (SR) machine is intrinsically a variable speed drive that can be easily controlled and matched to its load by settling the instants of energizing and deenergizing the stator phases [3]. Moreover, robustness and simple construction (only concentrated coils on the stator), control flexibility, high fault tolerance in a wide speed range [4][5], make this machine suitable for direct drive energy converters and attractive for harsh environmental applications. Previous and older treatments of SRG have focused on the design of high-speed SRG (...

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Control of a four-phase switched reluctance generator: experimental investigations

Cited by 18 publications

References 13 publications

Similarity laws in low speed switched reluctance machines design

Similarity laws in low speed switched reluctance machines design

Notice of Violation of IEEE Publication Principles - The use of Switched Reluctance menerator in wind energy applications

Field-based models for low speed switched reluctance machine designs

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