Performance of a magnetically suspended flywheel energy storage device

Ahrens, Markus; Kučera, L. J.; Larsonneur, R.

doi:10.1109/87.531916

Cited by 154 publications

(74 citation statements)

References 5 publications

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“…In recent decades, many control strategies have been applied to MSRs, such as decentralized PID [2][3][4], decentralized PID plus cross-feedback [5,6], centralized PID plus cross-feedback [1,[7][8][9][10], adaptive control [11], robust control [12,13], inverse control [14,15] and optimal control [16][17][18][19]. Among these control methods, centralized PID plus cross-feedback control is widely used in industrial applications because it is simple and convenient to implement.…”

Section: Introductionmentioning

confidence: 99%

Study on stability and rotating speed stable region of magnetically suspended rigid rotors using extended Nyquist criterion and gain-stable region theory

2017

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Study on stability and rotating speed stable region of magnetically suspended rigid rotors using extended Nyquist criterion and gain-stable region theory. ISA Transactions, 66, pp. 154-163. (doi:10.1016Transactions, 66, pp. 154-163. (doi:10. /j.isatra.2016 This is the author's final accepted version.There may be differences between this version and the published version. You are advised to consult the publisher's version if you wish to cite from it.http://eprints.gla.ac.uk/130660/

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Section: Introductionmentioning

confidence: 99%

Study on stability and rotating speed stable region of magnetically suspended rigid rotors using extended Nyquist criterion and gain-stable region theory

2017

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“…Their stiffness declines with the operating frequency [162] and they have limited control bandwidth [164] due to presence of coils and sensors and limited processing power of controllers. Gyroscopic effect and/or non-linearities can destabilize the rotor-bearings system at high speeds [165] and more complex control methods are needed such as cross-feedback [165] or non-linear feedback control [161].…”

Section: Active Magnetic Bearingsmentioning

confidence: 99%

Limits, Modeling and Design of High-Speed Permanent Magnet Machines

Borisavljevic¹

2013

Springer Theses

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“…An example is a flywheel for powering seam-welders, presented in [87]. The flywheel is a magnetically-levitated composite flywheel, rated at 250 kW and 1 kWh.…”

Section: Power Qualitymentioning

confidence: 99%

Flywheel Energy Storage for Automotive Applications

et al. 2015

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A review of flywheel energy storage technology was made, with a special focus on the progress in automotive applications. We found that there are at least 26 university research groups and 27 companies contributing to flywheel technology development. Flywheels are seen to excel in high-power applications, placing them closer in functionality to supercapacitors than to batteries. Examples of flywheels optimized for vehicular applications were found with a specific power of 5.5 kW/kg and a specific energy of 3.5 Wh/kg. Another flywheel system had 3.15 kW/kg and 6.4 Wh/kg, which can be compared to a state-of-the-art supercapacitor vehicular system with 1.7 kW/kg and 2.3 Wh/kg, respectively. Flywheel energy storage is reaching maturity, with 500 flywheel power buffer systems being deployed for London buses (resulting in fuel savings of over 20%), 400 flywheels in operation for grid frequency regulation and many hundreds more installed for uninterruptible power supply (UPS) applications. The industry estimates the mass-production cost of a specific consumer-car flywheel system to be 2000 USD. For regular cars, this system has been shown to save 35% fuel in the U.S. Federal Test Procedure (FTP) drive cycle.

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Performance of a magnetically suspended flywheel energy storage device

Cited by 154 publications

References 5 publications

Study on stability and rotating speed stable region of magnetically suspended rigid rotors using extended Nyquist criterion and gain-stable region theory

Study on stability and rotating speed stable region of magnetically suspended rigid rotors using extended Nyquist criterion and gain-stable region theory

Limits, Modeling and Design of High-Speed Permanent Magnet Machines

Flywheel Energy Storage for Automotive Applications

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