Redesign of Glenn research center D1 flywheel module

Jansen, Ralph; Wagner, Robert C.; Duffy, Kirsten P.; Hervol, David; Storozuk, R.J.; Dever, Timothy P.; Anzalone, S.M.; Trudell, J.J.; Konno, Kevin E.; Kenny, Andrew

doi:10.1109/iecec.2002.1392010

Cited by 2 publications

(4 citation statements)

References 2 publications

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“…FESS is now considered as an important technology for many applications in spaceflight, transportation, power industry, military equipment, etc [1][2][3][4][5][6][7][8][9]. However, almost all FESS modules in present usage are made up of a separate motor/generator, a flywheel, two sets of radial magnetic bearing, at least one set of axial magnetic bearings and two sets of touchdown bearings.…”

Section: Introductionmentioning

confidence: 99%

Control system design and implementation of a partially-self-bearing flywheel energy storage system

Zhang

Tseng

Nguyen

et al. 2011

2011 6th IEEE Conference on Industrial Electronics and Applications

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A compact flywheel energy storage system assisted by axial-flux partially-self-bearing permanent magnet motor has been proposed by the authors. The proposed machine combines axial magnetic bearing and motoring functionality into a single magnetic actuator, which not only spins the rotor-flywheel but also generates a levitation force to overcome the gravity. The mathematical model of the levitation force and rotational torque are developed. The control system of the position and speed is designed based on PID method. The experimental setup is built and the test results prove the feasibility of the proposed flywheel system concept, the correctness of the mathematical analysis and the validity of the designed control system. Index Terms-flywheel energy storage system, partially self bearing motor, axial flux PM motor, levitation force

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Section: Introductionmentioning

confidence: 99%

Control system design and implementation of a partially-self-bearing flywheel energy storage system

Zhang

Tseng

Nguyen

et al. 2011

2011 6th IEEE Conference on Industrial Electronics and Applications

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show abstract

“…The flywheel battery whose speed exceeds 60,000rpm can generate more than 80Whr/kg energy and 4 kW/kg power under the depth-of-discharge (DOD) of 75% nowadays [49,50], and projection values for the specific energy and power is 200Wh/kg and 30 kW/kg respectively [3].…”

Section: Comparisons Between Energy Storage Systemsmentioning

confidence: 99%

“…The specifications and other design data of the high speed 2-pole machine are listed in Table 3.3. According to the FESS developed by NASA [49], the maximum flywheel velocity is selected as 60,000 rpm. The maximum power of the machine is 4 kW, and the rated voltage is 220 V. The expected power factor and efficiency are both set to 0.9.…”

Section: Design Of the Partially-self-bearing Axial-flux Pm Machinementioning

confidence: 99%

“…Compared to the traditional FESSs, the proposed system has the advantages of simpler structure, easier operation and lower losses. Furthermore, the energy density, power density and efficiency of the proposed high speed FESS are comparable to those of the existing FESSs such as the FESSs developed by NASA[49].In this chapter, the magnetic analysis has been carried out to assist the machine design. The specification of a high-speed axial-flux PM machine was proposed and the machine wasdesigned based on the specific procedures.…”

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confidence: 98%

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Study of energy storage systems based on axial-flux flywheel-rotor electric machines

Zhang¹

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This thesis has proposed a compact and efficient Flywheel Energy Storage System (FESS) based on axial-flux partially-self-bearing permanent magnet (PM) machine. Five aspects on the design, analysis, control and implementation of the proposed FESS have been covered in the following sequence: (1) Design of the proposed FESS; (2) Modeling of axial-flux synchronous PM machine; (3) FEM analysis and model verification for the axial-flux PM machine; (4) Control design and experimental implementation of the proposed FESS; (5) Stabilizing synchronization control for the radial magnetic bearings. The conceptual FESS has been presented whereby the implementation of the axial-flux partially-self-bearing PM machine that provides dual functions of rotating the flywheel-rotor and levitating the flywheel-rotor in axial direction. Its design procedures have been described and the performance of a high-speed FESS employing such PM machine has been analyzed. This thesis has developed a multi-variable non-linear mathematical model of the dual-stator axial-flux PM synchronous machine. A linear model has been achieved after linearization. The three-dimensional finite element analyses have been implemented to examine the feasibility of the proposed FESS, to test the accuracy of the motor design and to verify the appropriateness of the mathematical model. Model-based predictive control (MPC) and proportional-integral-derivative (PID) control algorithms have both been employed to operate the axial-flux PM machine in the simulations. The PID control strategy for the proposed FESS has been implemented experimentally into a DSP-based drive control system whilst the hardware prototype of the FESS has been constructed. The experimental results have validated that the proposed FESS could be well droved. A stabilizing synchronization design has also been proposed by incorporating cross-coupling technology into the optimal control architecture in the control of radial ii ATTENTION: The Singapore Copyright Act applies to the use of this document. Nanyang Technological University Library Summary magnetic bearings for FESS. The simulation results has revealed that the resulting control system could be effective in recovering the unstable rotor and in suppressing the coupling effects of the gyroscopic rotation at high spinning speed in the presence of disturbances.

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Redesign of Glenn research center D1 flywheel module

Cited by 2 publications

References 2 publications

Control system design and implementation of a partially-self-bearing flywheel energy storage system

Control system design and implementation of a partially-self-bearing flywheel energy storage system

Study of energy storage systems based on axial-flux flywheel-rotor electric machines

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