Energy storage technologies are developing rapidly, and their application in different industrial sectors is increasing considerably. Electric rail transit systems use energy storage for different applications, including peak demand reduction, voltage regulation, and energy saving through recuperating regenerative braking energy. In this …
Electric vehicles (EVs) experience rapid battery degradation due to high peak power during acceleration and deceleration, followed by subsequent charging and discharging cycles during urban drive. To meet the high-power demands and mitigate degradation, EVs are equipped with larger-sized battery energy storage systems (ESS) …
This paper describes the design and analysis of a regenerative braking system for a. permanent magnet synchronous motor (PMSM) drive for electric vehicle (EV) applications. First studied is the ...
In [137], a flywheel energy storage system was applied to achieve a voltage stabilization at Kehin electric railway system in Japan whose rated power was 3000 kW and energy capacity of 0.025 MW. ...
Flywheel energy storage is a common method of mechanical energy storage. The vehicle flywheel energy storage system proposed achieves the recovery and release of vehicle braking energy …
An electric vehicle deceleration assisting energy storage device comprises an electric vehicle motor, a transmission mechanism and a power generator. A belt pulley is fixedly connected to the edge of the electric vehicle motor, the transmission mechanism consists ...
This paper presents a cascaded-multilevel-inverter-based motor drive system with integrated segmented energy storage. A power-distribution strategy among the energy source, the segmented energy storage, and the electric motor is proposed under different operation modes. A design guideline for energy storage is provided to meet the …
Mathematical models of the train, driving cycle and flywheel energy storage system are developed. These models are used to study the energy consumption and the operating cost of a light rail transit train with and without flywheel energy storage. Results suggest that maximum energy savings of 31% can be achieved using a flywheel …
The research focuses on Regenerative Braking System (RBS) of Series Hybrid Energy Storage System(SHESS) with battery and ultracapacitor(UC), which serves the deceleration as the target. For the sake of eliciting the energy constraint equation, the …
Efficient regenerative braking of electric vehicles (EVs) can enhance the efficiency of an energy storage system (ESS) and reduce the system cost. To ensure swift braking energy recovery, it is paramount to know the upper limit of the regenerative energy during braking. Therefore, this paper, based on 14 typical urban driving cycles, proposes …
Hybrid Energy Storage Systems (HESSs) have gathered considerable interest due to their potential to achieve high energy and power density by integrating different storage technologies, such as batteries and capacitors, to name a few. Among the various topologies explored for HESSs, the multi-output multilevel converter stands out as …
This paper presents a C-rate control method for a battery/supercapacitor (SC) hybrid energy storage system (HESS) to enhance the life cycle of the battery in electric vehicles (EVs). The proposed HESS provides satisfactory power for dynamic movements of EVs (e.g., acceleration or braking) while keeping the battery current within …
Abstract: In this paper, the mechanical characteristics, charging/discharging control strategies of switched reluctance motor driven large-inertia flywheel energy storage …
Keywords: electric vehicle efficiency; motor controller efficiency; smart acceleration; smart deceleration. DOI: 10.1504/IJEHV.2018.098089 International Journal of Electric and Hybrid Vehicles, 2018 Vol.10 No.4, pp.283 - 298 …
The deceleration time is to determine the time required for AC motor drive to decelerate from its maximum output frequency to 0.0Hz. When an AC motor drive operates in a full load condition, large load inertia is likely to occur and cause motor continues to ramp when the output is stopped.
In this paper, the mechanical characteristics, charging/discharging control strategies of switched reluctance motor driven large-inertia flywheel energy storage system are analyzed and studied. The switched reluctance motor (SRM) can realize the convenient switching of motor/generator mode through the change of conduction area. And the …
The motor design features low rotor losses, a slotless stator, construction from robust and low cost materials, and a rotor that also serves as the energy storage rotor for the flywheel...
EVs possess an important while basic regenerative braking hardware: energy conversion mechanism—the motor and energy storage system (ESS)—the …
Innovations in electric vehicle technology have led to a need for maximum energy storage in the energy source to provide some extra kilometers. The size of electric vehicles limits the size of the batteries, thus limiting the amount of energy that can be stored. Range anxiety amongst the crowd prevents the entire population from shifting to a …
This paper provides an overview of the structures of automatic control systems for supercapacitor energy storage devices. The composition and principles of regulating …
Regenerative braking plays an important role in improving the driving range of electric vehicles. To achieve accurate and efficient braking deceleration control, this research focuses on energy recovery process with ultracapacitor (UC). According to the statistical analysis results of the characteristics for typical operation, a multi-step series …
Thermal energy storage technologies enable the desired heat or coldness to originate from centralised thermal generating facilities ... Design and analysis of bearingless flywheel motor specially for flywheel energy storage Electron Lett, 52 (2016), pp. 66-68, 10. ...
General principle The most common form of regenerative brake involves an electric motor functioning as an electric generator. In electric railways, the electricity generated is fed back into the traction power supply battery …
During this operation, the motor controller is designed to recover the kinetic energy and store it in the battery or the capacitor banks. Regenerative braking helps in extending the range of the electric vehicle by 8-25%. Apart from saving energy and enhancing the range, it also helps in effective control of the braking operation.
Results show that compared with the single energy scheme with lithium battery, under CLTC, as the control motor of the electric flywheel operates under high …
The multilevel control strategy for flywheel energy storage systems (FESSs) encompasses several phases, such as the start-up, charging, energy release, …
Li Zhongrui et al. [] used the working characteristics of flywheel energy storage to propose an optimized charging control strategy, which effectively suppressed the influence of motor loss power and load power.Li Bin et al. [] proposed a microgrid coordinated control strategy based on a battery/flywheel electromechanical hybrid energy …
A hybrid energy storage system (HESS), which consists of a battery and a supercapacitor, presents good performances on both the power density and the energy density when applying to electric vehicles. In this research, an HESS is designed targeting at a commercialized EV model and a driving condition-adaptive rule-based energy …
The paper signifies the advantages of regenerative braking and discusses the control design and simulation of a hybrid energy storage system (HESS) with a new method of energy …
In this lesson we''ll take a brief look at deceleration and braking methods employed by motor drives. We''ll examine coasting or free spin to stop, spring appl...