Construction and Control of AMBs High Speed Flywheel

Abstract

The paper reports on investigation and development of a flywheel device intended for an energy storage prototype. The goal was to design and experimentally verify the concept of self-integrated flywheel with smart control of energy flow and accumulation. The Flywheel Energy Storage System (FESS) must has high energy efficiency and structural robustness. Investigation on structural dynamics of the composite flywheel connected with outer type rotor was carried out using Finite Element Method. The FESS is designed to run in vacuum and is supported on low-energy, controlled, active magnetic bearings (AMBs). The flywheel device of 10 MJ energy density and a weight of 150 kg with two integrated rotors/generators of 50 kW power density each is intended to operate up to 40 000 rpm.

AMB flywheel integration with photovoltaic system for household purpose – modelling and analysis

“…The sampling frequency of the AMBs controllers equal to 10 kHz. For more details of AMB flywheel configuration please refers to [11,12,18].…”

“…A review of flywheelbased energy storage systems has been given in [17]. The active magnetic bearing (AMB) flywheel prototype design and control approach have been given by the author in [11,12]. Major advantages of AMB flywheels result from modern technologies of composite materials with high tensile strength, which allow for high rotational speeds and high energy density [2,7].…”

Improving the Satellite Power Supply Continuity using Flywheel Energy Storage System

“…Moreover, the most important parameters of FESS for satellite applications are efficiency, lifetime, reliability, operating temperature, weight, volume, and system cost. Additionally, flywheel systems perform the same function as rechargeable electrochemical batteries, in addition to their recent better performance in many ways m [ 3 ] Over the past ten years, numerous developments have taken place in the flywheels in terms of materials with which they can be built [3,4] and the method for controlling their performance, which has increased their capabilities [5][6][7][8], while others Mohamed El Amir Attalla, and Hassna M. El Arwas "Improving the Satellite Power Supply Continuity using Flywheel Energy Storage System" concentrated on the flywheel sizing and its different applications [9,10]. Therefore, the flywheel storage capacity is higher than the past.…”

“…In 2011, a design was presented to build a long-lifetime flywheel with minor maintenance need for high energy density, supported by radial and axial magnetic bearings of low energy consumption. Thus, the energy-saving magnetic bearings flywheel is developed and verified via simulation and experimental investigations [4]. Also, in 2013, a flywheel associated with a gridconnected variable-speed wind generation scheme, using a Doubly-Fed Induction Generator (DFIG), has been investigated [5].…”