Brushless excitation

Dillman, T. L.; Keay, F. W.; Raczkowski, C.; Skooglund, J. W.; South, W. H.

doi:10.1109/mspec.1972.5218751

Cited by 20 publications

(6 citation statements)

References 9 publications

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“…As shown in Fig. 1, the first ESs were based on DC exciters [59]. These use DC generators as a power source, driven by a separate motor or by the main alternator shaft, and supply DC current to the field through slip rings.…”

Section: Excitation System Technologies and Their Evolutionmentioning

confidence: 99%

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

et al. 2019

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Wound-field synchronous machines (WFSMs) are included in the majority of large power generating units and special high-power motor drives, due to their high efficiency, flexible field excitation and intrinsic flux weakening capability. Moreover, they are employed in a wide range of high-end solutions in the low-to-medium power range. This contribution presents a comprehensive survey of classical and modern methods and technologies for excitation systems (ESs) of WFSMs. The work covers the fundamental theory, typical de-excitation methods and all the modern excitation equipment topologies in detail. It also includes a description of the state-of-the-art and the latest trends in the ESs of wound-field synchronous motors and generators. The purpose of the paper is to provide a useful and up-to-date reference for practitioners and researchers in the field.

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Section: Excitation System Technologies and Their Evolutionmentioning

confidence: 99%

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

et al. 2019

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“…In any case the generator should be controlled to maximize efficiency. Similarly to conventional wound field machines the HS rotor winding could be supplied through slip rings and brushes, or using a brushless exciter system [16].…”

Section: Control Of the Pddmentioning

confidence: 99%

Coil Excited Pseudo Direct Drive Electrical Machines

et al. 2017

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A Pseudo Direct Drive (PDD) equipped with a coil excited high-speed (HS) rotor is presented. An analytical model which predicts the flux density in the air spaces and permanent magnets (PM) of the PDD is presented, and it is shown, that a good agreement exists between the analytical and finite element (FE) predictions. Furthermore, the model is employed to investigate the effects of the key design parameters on the performance of a coil excited PDD for a 10MW wind turbine application and an optimised design is proposed. It is shown that shear stress in excess of 100kPa can be achieved, and that compared to a PM excited PDD a reduction in PM mass can be realized. It is also shown that the efficiency over the operating range of the wind turbine can be maximized by adopting an appropriate control strategy of the HS rotor excitation currents.

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“…Rotating power electronics (RPE) is not something completely new in the application of electrical machines. The passive rotating diode-bridge rectifier has been in operation in the brushless excitation system for synchronous machines since the 1960s [1].…”

Section: Introductionmentioning

confidence: 99%

Rotating Power Electronics for Electrical Machines and Drives - Design Considerations and Examples

Nøland

Molinas

2020

2020 15th IEEE Conference on Industrial Electronics and Applications (ICIEA)

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The industrial shift towards rotating power electronics (RPE) promotes brushless flexible rotor excitation, as well as battery-less rotor instrumentation and measurement devices for electrical machines. Recently, the high-power thyristor converter has been proven to be excellent for rotating applications. Moreover, MOSFET components have been successful for lowpower rotating applications. However, the question arises whether IGBT's, capacitors and related components are able to withstand the centrifugal forces that are generated due to shaft rotation. In fact, the manufacturers do not conventionally test their power electronic components against cyclic accelerational forces. Moreover, the insulation material in some types of semiconductor modules are viscous and will be affected by rotational forces. This paper addresses the current design challenges and presents new design criteria for RPE systems and applications. Finally, this paper reviews the current technology status for RPE concepts.

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Brushless excitation

Cited by 20 publications

References 9 publications

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

Excitation System Technologies for Wound-Field Synchronous Machines: Survey of Solutions and Evolving Trends

Coil Excited Pseudo Direct Drive Electrical Machines

Rotating Power Electronics for Electrical Machines and Drives - Design Considerations and Examples

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