The Rotary Era, Part 1: Early ac-to-dc Power Conversion [History]

Blalock, Thomas J.

doi:10.1109/mpe.2013.2265791

Cited by 5 publications

(3 citation statements)

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“…On the level of generation and mass supply it was the introduction of the rotary converter that allowed for the provision of electricity as a standardised product. Invented in 1888 by a former Edison engineer Charles Bradley, this was a device that could turn one type of current into another and transform a range of voltages, frequencies and phases into one form of output (Blalock, 2013). It regulated the flow, meaning that essentially the whole of the supply side of the electrification was operating on one protocol, making it suitable for utility provision.…”

Section: Plugging Inmentioning

confidence: 99%

Plugging in: Power sockets, standards and the valencies of national habitus

Taylor

2014

Journal of Material Culture

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This article examines why it is not possible to plug a British plug directly into a Dutch power socket. The author traces the development of the British Standard BS1363 plug-socket assembly and compares it to the European arrangement in order to demonstrate how the 'banal nationalism' of everyday life is formed and can be seen to be manifest in everyday utilitarian artefacts. A concept of nationhood that is formed in terms of 'national habitus' is elaborated, the nation is envisaged as being constituted by the socio-technological infrastructures upon which it depends, which are established as being formed by the governmentalities that have allowed them to come into being, and it is suggested that such a system will operate at a range of scales or valencies. By tracing the history of the two examples given, the intention is to demonstrate how each national habitus depends upon a particular technical development shaped by social forces.

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Section: Plugging Inmentioning

confidence: 99%

Plugging in: Power sockets, standards and the valencies of national habitus

Taylor

2014

Journal of Material Culture

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“…The war ended when the AC distribution system was adopted. The main reason the AC became victorious was the invention of the transformer, which could easily convert high-voltage without additional control [1], [2].…”

Section: Introductionmentioning

confidence: 99%

Hardware-in-the-Loop Simulation for Active Control of Tramcars With Independently Rotating Wheels

Lee

Liu

et al. 2019

IEEE Access

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The wheelset is an important part that affects the dynamics of railway vehicles. The main purpose of the wheelset is to solve the problem of stability, curve performance, comfort, and wear. A conventional railway vehicle adopts rigid-axle wheelset (RW) due to the self-centering mechanism. On the other hand, independently rotating wheels (IRWs) have not been widely applied in the railway industry, since they do not generate any self-centering mechanism. It creates excessive wear, and derailment may occur. However, the IRWs have excellent curving performance compared with the RWs, and it enables realizing a low-floor structure that is convenient for passengers to get on and off. The recent active control technology has made it possible to generate a centering force in the IRWs. There are still many obstacles for the practical use of this technology, and it is necessary to verify the control strategies through various test methods. In this paper, an analytical model is derived, and an active control strategy is studied. To verify the validity of the active control strategy, a novel hardware-in-the-loop simulation (HILS) configuration using a real-time model and a motor-generator set are proposed. INDEX TERMSActive control, hardware-in-the-loop simulation (HILS), motor control, independently rotating wheels (IRWs), railway vehicle, rigid-axle wheelset (RW).

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“…INDEX TERMS Four-switch three-phase inverter, four-voltage-vector, hybrid switching control, model-free predictive current control, synchronous reluctance motor. In the past few decades, power converters and motor drive applications have grown exponentially in various industries, such as manufacturing, power generation, and hybrid electric vehicles [1]- [2]. Thanks to the rapid development of fast and powerful microcontrollers, industrial electronics has changed the paradigm and become a leading industry for efficiency and increased performance.…”

mentioning

confidence: 99%

Hybrid Switching of Four-Voltage-Vector Model-Free Predictive Current Control for Four-Switch Three-Phase Inverter-Fed SynRM Drive Systems

Lin

Agustin

2022

IEEE Open J. Ind. Electron. Soc.

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Conventional model-based predictive current control (MBPCC) suffers from common drawbacks of high reliance on system model parameters and the use of a single input voltage vector that result in large pulsating current ripples and prediction errors. In the case of a four-switch three-phase inverter (FSTPI) topology, the implementation of the predictive controller is exacerbated due to limited numbers of candidate voltage vectors. This paper presents an integrated model-free predictive current control with a hybrid switching mechanism to solve the problem. The proposed method introduces the combined switching mechanism of input voltage vectors with fixed and variable modulations by increasing the number of switching voltage vectors. The four basic voltage vectors generated in the four-switch three-phase inverter create twenty-four new synthesized voltage vectors through fourfold linear expansions of the space vector plane. The switching durations of input voltage vectors are determined by calculating their optimal duty ratios. As a result, the proposed method improved the prediction accuracy by increasing the iteration calculations of current differences every sampling period. The proposed method, known as the hybrid switching of four-voltage-vector model-free predictive current control (HS-4VV-MFPCC), is practically tested via simulation and experimental works to evaluate its effectiveness and performance improvement.

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The Rotary Era, Part 1: Early ac-to-dc Power Conversion [History]

Cited by 5 publications

References 1 publication

Plugging in: Power sockets, standards and the valencies of national habitus

Plugging in: Power sockets, standards and the valencies of national habitus

Hardware-in-the-Loop Simulation for Active Control of Tramcars With Independently Rotating Wheels

Hybrid Switching of Four-Voltage-Vector Model-Free Predictive Current Control for Four-Switch Three-Phase Inverter-Fed SynRM Drive Systems

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